CN111502276A - Environment-friendly waterproof heat-preservation construction method - Google Patents
Environment-friendly waterproof heat-preservation construction method Download PDFInfo
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- CN111502276A CN111502276A CN202010319415.0A CN202010319415A CN111502276A CN 111502276 A CN111502276 A CN 111502276A CN 202010319415 A CN202010319415 A CN 202010319415A CN 111502276 A CN111502276 A CN 111502276A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 238000004321 preservation Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000011381 foam concrete Substances 0.000 claims abstract description 78
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910000077 silane Inorganic materials 0.000 claims abstract description 66
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 59
- 239000002131 composite material Substances 0.000 claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 18
- 239000000178 monomer Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000006185 dispersion Substances 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims description 31
- 238000005187 foaming Methods 0.000 claims description 30
- 239000006260 foam Substances 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 24
- 239000004088 foaming agent Substances 0.000 claims description 20
- 239000011734 sodium Substances 0.000 claims description 19
- 229910052708 sodium Inorganic materials 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 16
- 238000007790 scraping Methods 0.000 claims description 16
- 239000003381 stabilizer Substances 0.000 claims description 16
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 13
- 239000010881 fly ash Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 11
- -1 alkenyl sulfonate Chemical compound 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 10
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 10
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 229920000053 polysorbate 80 Polymers 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 9
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 8
- 235000013539 calcium stearate Nutrition 0.000 claims description 8
- 239000008116 calcium stearate Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000004078 waterproofing Methods 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000391 magnesium silicate Substances 0.000 claims description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 2
- 235000019792 magnesium silicate Nutrition 0.000 claims description 2
- 229940117013 triethanolamine oleate Drugs 0.000 claims description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 2
- 229960001763 zinc sulfate Drugs 0.000 claims description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 21
- 230000000694 effects Effects 0.000 description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- KDJNNYXXPNIWGP-UHFFFAOYSA-N 2-methylprop-1-ene triethoxysilane Chemical compound C(C)O[SiH](OCC)OCC.C=C(C)C KDJNNYXXPNIWGP-UHFFFAOYSA-N 0.000 description 8
- HXOGQBSDPSMHJK-UHFFFAOYSA-N triethoxy(6-methylheptyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCCC(C)C HXOGQBSDPSMHJK-UHFFFAOYSA-N 0.000 description 8
- 239000012855 volatile organic compound Substances 0.000 description 8
- 239000003973 paint Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 239000011440 grout Substances 0.000 description 5
- 239000003755 preservative agent Substances 0.000 description 5
- 230000002335 preservative effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 238000009435 building construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003075 superhydrophobic effect Effects 0.000 description 2
- 239000008030 superplasticizer Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Acoustics & Sound (AREA)
- Paints Or Removers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an environment-friendly waterproof heat-preservation construction method, which comprises the following steps: base layer treatment → heat insulation layer pouring → waterproof treatment. The waterproof treatment is to coat a graphene oxide/silane composite material on the surface of the heat preservation layer, wherein the graphene oxide/silane composite material is obtained by homogenizing a graphene oxide dispersion liquid, an emulsifier and water to obtain a water phase; homogenizing a silane monomer and a dispersing agent to obtain an oil phase; adding the oil phase into the water phase under the stirring condition, and then continuously stirring for 4-9 hours to obtain the graphene oxide/silane composite material. Compared with the prior art, the environment-friendly foam concrete heat-insulating layer is coated by adopting the environment-friendly graphene oxide/silane composite material, so that the waterproof performance of the heat-insulating layer is effectively improved, and the good environment-friendly waterproof heat-insulating performance is realized.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to an environment-friendly waterproof heat-preservation construction method.
Background
At present, the problem of energy shortage is very serious, and the energy consumed by the building industry is huge all the time, which is mainly the energy consumed by house heating. Therefore, the development of building heat-insulating materials is very important, and the heat-insulating property is closely related to the waterproof property. In the prior art, the construction method of environmental protection, water resistance and heat insulation is usually that a base layer is coated with a high molecular polymer waterproof paint or a high molecular polymer waterproof material is laid as a steam-proof layer, then a heat insulation layer is laid, and then the surface of the heat insulation layer is coated with the high molecular polymer waterproof paint or the high molecular polymer waterproof material is laid as a waterproof layer. The polymer waterproof coating and the high-molecular polymer waterproof material which are used in large quantities have organic volatile compounds (VOC), are easy to generate harm to human health, and have the problem of environmental pollution.
The foam concrete is prepared by foaming a concrete foaming agent in a physical or chemical mode to prepare foam, introducing the foam into concrete slurry, uniformly stirring the foam and other raw materials such as an additive and the like, and finally pouring a mold to perform maintenance. The heat-insulating brick has the advantages of small heat conductivity coefficient, good heat-insulating property, light weight, environmental protection, fire prevention and the like, but has certain problems when being applied to the field of building construction. For example, foam concrete has a certain degree of capillary water absorption, and is easy to absorb indoor water vapor, so that the heat insulation performance of the foam concrete is reduced, and brushing a high-molecular polymer waterproof coating or paving a high-molecular polymer waterproof material as a vapor barrier is against the original purpose of environmental protection. Therefore, it is necessary to develop an environmental protection waterproof thermal insulation construction method to solve the above problems.
Disclosure of Invention
In view of the defects of the prior art, the invention provides an environment-friendly waterproof heat-preservation construction method, which adopts environment-friendly foam concrete and coats the graphene oxide/silane composite material, effectively reduces the use of high-molecular polymer waterproof paint, high-molecular polymer waterproof coiled material and high-molecular polymer heat-preservation layer, reduces the problem of organic volatile compounds (VOC), realizes environment protection, and effectively improves heat-preservation and waterproof effects.
The technical scheme of the invention is as follows:
an environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely stirring 80-120 parts by weight of cement, 5-30 parts by weight of fly ash, 2-5 parts by weight of water reducing agent, 2-6 parts by weight of accelerator and 35-50 parts by weight of water for 1-3 min under the condition of a rotation speed of 100-300 rpm to obtain cement paste, mixing 2-4 parts by weight of foaming agent, 0.08-0.20 part by weight of foaming stability and 40-60 parts by weight of water for foaming for 2-8 min to obtain foam, stirring the cement paste and the foam for 3-7 min under the condition of a rotation speed of 20-100 rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by using a pipeline pump, casting by self-flowing, scraping by using a scraping bar, watering for 1 time every 8-12 hours after 12-24 hours, wherein the dosage is 0.2-0.8L/m each time2Maintaining for 4-10 days;
s3 waterproof treatment: coating a graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the using amount of the graphene oxide/silane composite material is 200-800 g/m2And curing for 4-10 days.
According to the invention, the graphene oxide/silane composite material is adopted, so that the generation of a silicate cement hydrate-ettringite crystal on the surface of the foam concrete can be promoted, the surface micro-roughness of the foam concrete is improved, the surface is reduced by matching with silane, the hydrophobic property of the surface of the foam concrete can be effectively improved, and the waterproof effect is provided.
The environment-friendly waterproof heat-insulation construction method can provide good waterproof effect and heat-insulation effect; however, the foam concrete has a certain capillary water absorption effect, and is easy to absorb indoor water vapor, so that the heat insulation effect of the foam concrete heat insulation layer is poor. In the existing waterproof and heat-insulating construction technology, in order to prevent indoor water vapor from permeating into the heat-insulating layer, a layer of airtight and watertight high polymer waterproof material is usually laid on the roof or coated with high polymer waterproof paint. The high-molecular polymer waterproof coating and the high-molecular polymer waterproof coating are not environment-friendly enough, Volatile Organic Compounds (VOC) are easy to bring physical harm to constructors, and meanwhile, the Volatile Organic Compounds (VOC) may exist indoors due to long-time accumulation and release. Therefore, the invention further improves the foam concrete, and the specific technical scheme is as follows:
an environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely stirring 80-120 parts by weight of cement, 5-30 parts by weight of fly ash, 5-12 parts by weight of silicone, 2-5 parts by weight of water reducing agent, 2-6 parts by weight of accelerator and 35-50 parts by weight of water for 1-3 min under the condition of the rotation speed of 100-300 rpm to obtain cement paste, mixing 2-4 parts by weight of foaming agent, 0.08-0.20 part by weight of foaming stabilizer and 40-60 parts by weight of water for foaming for 2-8 min to obtain foam, stirring the cement paste and the foam for 3-7 min under the condition of the rotation speed of 20-100 rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by using a pipeline pump, casting by self-flowing, leveling by using a scraping bar, watering for 1 time every 8-12 hours after 12-24 hours, wherein the dosage is 0.2-0.8L/m each time2Maintaining for 4-10 days;
s3 waterproof treatment: coating a graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the using amount of the graphene oxide/silane composite material is 200-800 g/m2And curing for 4-10 days.
By adding the silicone into the foam concrete formula, the overall hydrophobicity of the foam concrete can be effectively improved, and the capillary water absorption effect of the foam concrete is reduced.
Preferably, the water reducing agent is any one of an aliphatic water reducing agent, a polycarboxylic acid water reducing agent and a sulfamate water reducing agent.
Preferably, the accelerator is any one of sodium metaaluminate, magnesium silicate, aluminum sulfate, copper sulfate and zinc sulfate.
Preferably, the foaming agent is one of sodium dodecyl sulfate, α -sodium alkenyl sulfonate and sodium dodecyl benzene sulfonate, and further preferably, the foaming agent is α -sodium alkenyl sulfonate.
Preferably, the foaming stabilizer is calcium stearate and/or triethanolamine oleate.
Preferably, the graphene oxide/silane composite material is prepared by homogenizing 40-60 parts by weight of graphene oxide dispersion liquid, 1-5 parts by weight of emulsifier and 1-5 parts by weight of water to obtain a water phase; homogenizing 30-50 parts by weight of silane monomer and 7-15 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at the temperature of 45-60 ℃ and the rpm of 300-600, and continuously stirring for 4-9 hours to obtain the graphene oxide/silane composite material.
Preferably, the content of the graphene oxide in the graphene oxide dispersion liquid is 1-5%.
Preferably, the emulsifier is one or a combination of two or more of tween-80, propylene glycol methyl ether, sodium dodecyl sulfate and sodium dodecyl benzene sulfonate. Further preferably, the emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to a mass ratio of (3-6) to 1.
Preferably, the silane monomer is one of or a mixture of isobutylene triethoxysilane and isooctyl triethoxysilane. More preferably, the silane monomer is formed by mixing isobutene triethoxysilane and isooctyl triethoxysilane according to the mass ratio of (1-3) to (1-3).
Preferably, the dispersant is acrylic acid or itaconic acid.
The invention has the beneficial effects that:
compared with the prior art, the graphene oxide/silane composite material can promote the generation of an ettringite crystal which is a silicate cement hydration product on the surface of the foam concrete, improve the surface micro roughness of the foam concrete, reduce the surface by matching with silane, effectively improve the hydrophobic property of the surface of the foam concrete and provide a waterproof effect. Moreover, the use of high molecular polymer waterproof paint and high molecular polymer waterproof material is effectively reduced, the problem of organic volatile compounds (VOC) is reduced, and the heat preservation and waterproof effects are effectively ensured. Moreover, the invention also modifies the foam concrete, realizes full-scale waterproofing of the foam concrete, and can still provide good waterproofing effect after the waterproof layer on the surface of the foam concrete thermal insulation layer is damaged.
Detailed Description
The specific parameters of some substances in the embodiment of the invention are as follows:
the concrete indexes of the cement, P.O.52.5 and Huicha nidulans corporation are as follows:
silicone, also known as silicone oil or dimethicone, CAS number: 63148-62-9 and the silicone used in the examples of the present invention has a viscosity of 500. + -.30 mPas, which is commercially available from Shanghai Aladdin Biotech Co., Ltd.
Fly ash, class I fly ash and SiO256.7% of Al2O3The content is 21.4%, the ignition loss is 2.50%, and the water demand is 95%.
Polycarboxylate superplasticizer, model number RHEOP L US 410, brand: Basff.
Sodium metaaluminate, CAS number: 1302-42-7.
α -sodium alkenyl sulfonate, AOS for short, CAS number 68439-57-6.
The graphene oxide dispersion liquid adopted by the embodiment of the invention has the graphene oxide content of 3 wt%, and the type is as follows: TNWGO-50, a Chinese academy of sciences organic chemistry Co., Ltd.
Tween-80, CAS No.: 9005-65-6.
Propylene glycol methyl ether, CAS No.: 107-98-2.
Isobutylene triethoxysilane, CAS No.: 17980-47-1.
Isooctyltriethoxysilane, CAS No.: 35435-21-3.
Acrylic acid, CAS No.: 79-10-7.
Example 1
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 pouring an insulating layer: 100 parts by weight of cement, 10 parts by weight of fly ash, 2.5 parts by weight of polycarboxylate superplasticizer, 3 parts by weight of accelerator and 41 parts by weight of water are put into a stirrer and stirred for 2m at the rotating speed of 200rpmin to obtain cement paste, adding 3 parts by weight of foaming agent, 0.1 part by weight of foaming stabilizer and 50 parts by weight of water into a hydraulic foaming machine to foam for 5min to obtain foam, stirring the cement paste and the foam for 5min under the condition of 50rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by a pipeline pump, pouring by self-flowing, scraping by a scraping bar, and watering for 1 time every 12 hours after 24 hours, wherein the dosage of each time is 0.5L/m2Maintaining for 5 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 400g/m2And naturally curing for 5 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is formed by mixing isobutene triethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
The present embodiment also pours the foam concrete grout in step S2 to a size of 100 × 100 × 50mm3The mould is covered by a preservative film, and after 24 hours, the water is watered for 1 time every 12 hours, wherein the dosage is 0.5L/m2Curing for 7 days, drying the demolded foam concrete at 60 ℃ for 48h, then cutting into 30mm × 30mm × 20mm, polishing the cut surface for 3min, then ultrasonically cleaning for 20min, then drying in vacuum at 60 ℃ for 48h, and then drying the graphene oxide/silane composite material obtained in the step S3 at 400g/m2In such an amount that it is applied to the foamed concreteOne surface was cured at 20 ℃ and 85% relative humidity for 5 days, and finally the samples were oven dried at 75 ℃ to constant weight and subjected to hydrophobicity testing.
Example 2
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely placing 100 parts by weight of cement, 10 parts by weight of fly ash, 2.5 parts by weight of polycarboxylic acid water reducing agent, 3 parts by weight of accelerating agent and 41 parts by weight of water into a stirrer to be stirred for 2min under the condition of 200rpm to obtain cement paste, adding 3 parts by weight of foaming agent, 0.1 part by weight of foaming stabilizer and 50 parts by weight of water into a hydraulic foaming machine to be foamed for 5min to obtain foam, stirring the cement paste and the foam for 5min under the condition of 50rpm to obtain foam concrete slurry, conveying the foam concrete slurry to a construction area by a pipeline pump, casting by self-flowing, leveling by a scraping bar, watering for 1 time every 12 hours after 24 hours, wherein the dosage is 0.5L/m each time2Maintaining for 5 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 400g/m2And naturally curing for 5 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is prepared by mixing isooctyltriethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
The present embodiment also pours the foam concrete grout in step S2 to a size of 100 × 100 × 50mm3The mould is covered by a preservative film, and after 24 hours, the water is watered for 1 time every 12 hours, wherein the dosage is 0.5L/m2Curing for 7 days, drying the demolded foam concrete at 60 ℃ for 48h, then cutting into 30mm × 30mm × 20mm, polishing the cut surface for 3min, then ultrasonically cleaning for 20min, then drying in vacuum at 60 ℃ for 48h, and then drying the graphene oxide/silane composite material obtained in the step S3 at 400g/m2The dosage of the compound is coated on one surface of the foam concrete, the foam concrete is solidified for 5 days under the conditions of 20 ℃ and 85 percent of relative humidity, and finally, the sample is dried at 75 ℃ to be constant weight and then subjected to hydrophobicity test.
Example 3
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely placing 100 parts by weight of cement, 10 parts by weight of fly ash, 2.5 parts by weight of polycarboxylic acid water reducing agent, 3 parts by weight of accelerating agent and 41 parts by weight of water into a stirrer to be stirred for 2min under the condition of 200rpm to obtain cement paste, adding 3 parts by weight of foaming agent, 0.1 part by weight of foaming stabilizer and 50 parts by weight of water into a hydraulic foaming machine to be foamed for 5min to obtain foam, stirring the cement paste and the foam for 5min under the condition of 50rpm to obtain foam concrete slurry, conveying the foam concrete slurry to a construction area by a pipeline pump, casting by self-flowing, leveling by a scraping bar, watering for 1 time every 12 hours after 24 hours, wherein the dosage is 0.5L/m each time2Maintaining for 5 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 400g/m2And naturally curing for 5 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is formed by mixing isobutene triethoxysilane and isooctyl triethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
The present embodiment also pours the foam concrete grout in step S2 to a size of 100 × 100 × 50mm3The mould is covered by a preservative film, and after 24 hours, the water is watered for 1 time every 12 hours, wherein the dosage is 0.5L/m2Maintaining for 5 days; drying the demoulded foam concrete at 60 ℃ for 48h, and then drying the graphene oxide/silane composite material obtained in the step S3 at the ratio of 400g/m2The amount of (b) was applied to one surface of the foam concrete, leaving the coated side and the opposite side, while the other four sides were sealed with paraffin, cured at 20 ℃ and 85% relative humidity for 5 days, and finally the sample was dried at 75 ℃ to a constant weight and subjected to a capillary water absorption test.
The present embodiment also pours the foam concrete grout in step S2 to a size of 100 × 100 × 50mm3The mould is covered by a preservative film, and after 24 hours, the water is watered for 1 time every 12 hours, wherein the dosage is 0.5L/m2Curing for 7 days, drying the demolded foam concrete at 60 ℃ for 48h, then cutting into 30mm × 30mm × 20mm, polishing the cut surface for 3min, then ultrasonically cleaning for 20min, then drying in vacuum at 60 ℃ for 48h, and then drying the graphene oxide/silane composite material obtained in the step S3 at 400g/m2The dosage is coated on one surface of the foam concrete at the temperature of 20℃,Curing for 5 days under the condition of 85 percent of relative humidity, and finally drying the sample at 75 ℃ to constant weight and then carrying out hydrophobicity test.
Example 4
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely placing 100 parts by weight of cement, 10 parts by weight of fly ash, 8 parts by weight of silicone, 2.5 parts by weight of polycarboxylic acid water reducing agent, 3 parts by weight of accelerating agent and 41 parts by weight of water into a stirrer and stirring for 2min at the rotation speed of 200rpm to obtain cement paste, adding 3 parts by weight of foaming agent, 0.1 part by weight of foaming stabilizer and 50 parts by weight of water into a hydraulic foaming machine to foam for 5min to obtain foam, stirring the cement paste and the foam for 5min at the rotation speed of 50rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by a pipeline pump, casting by self-flowing, scraping by a scraping bar, watering for 1 time every 12 hours after 24 hours, wherein the dosage is 0.5L/m2Maintaining for 5 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 400g/m2And naturally curing for 5 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is formed by mixing isobutene triethoxysilane and isooctyl triethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
The present embodiment also pours the foam concrete grout in step S2 to a size of 100 × 100 × 50mm3The mould is covered by a preservative film, and after 24 hours, the water is watered for 1 time every 12 hours, wherein the dosage is 0.5L/m2Maintaining for 5 days; drying the demoulded foam concrete at 60 ℃ for 48h, and then drying the graphene oxide/silane composite material obtained in the step S3 at the ratio of 400g/m2The amount of (b) was applied to one surface of the foam concrete, leaving the coated side and the opposite side, while the other four sides were sealed with paraffin, cured at 20 ℃ and 85% relative humidity for 5 days, and finally the sample was dried at 75 ℃ to a constant weight and subjected to a capillary water absorption test.
Example 5
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely putting 80 parts by weight of cement, 5 parts by weight of fly ash, 5 parts by weight of silicone, 2 parts by weight of polycarboxylic acid water reducing agent, 2 parts by weight of accelerating agent and 35 parts by weight of water into a stirrer and stirring for 1min at the rotation speed of 100rpm to obtain cement paste, adding 2 parts by weight of foaming agent, 0.08 part by weight of foaming stabilizer and 40 parts by weight of water into a hydraulic foaming machine to foam for 3min to obtain foam, stirring the cement paste and the foam for 3min at the rotation speed of 20rpm to obtain foam concrete slurry, conveying the foam concrete slurry to a construction area by a pipeline pump, casting by self-flowing, scraping by a scraping bar, watering for 1 time every 12 hours after 24 hours, wherein the dosage is 0.3L/m each time2Maintaining for 10 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 200g/m2And naturally curing for 4 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is formed by mixing isobutene triethoxysilane and isooctyl triethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
Example 6
An environment-friendly waterproof heat-preservation construction method comprises the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely putting 120 parts by weight of cement, 30 parts by weight of fly ash, 12 parts by weight of silicone, 5 parts by weight of polycarboxylic acid water reducing agent, 6 parts by weight of accelerating agent and 50 parts by weight of water into a stirrer, stirring for 3min at the rotating speed of 300rpm to obtain cement paste, adding 4 parts by weight of foaming agent, 0.2 part by weight of foaming stabilizer and 60 parts by weight of water into a hydraulic foaming machine, foaming for 8min to obtain foam, stirring the cement paste and the foam for 7min at the rotating speed of 100rpm to obtain foam concrete slurry, conveying the foam concrete slurry to a construction area by a pipeline pump, casting by self-flowing, scraping by a scraping bar, watering for 1 time every 12 hours after 24 hours, wherein the dosage is 0.8L/m each time2Maintaining for 4 days;
s3 waterproof treatment: coating the graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the dosage is 800g/m2And naturally curing for 10 days.
The accelerating agent is sodium metaaluminate.
The foaming agent is α -sodium alkenyl sulfonate.
The foaming stabilizer is calcium stearate.
The preparation method of the graphene oxide/silane composite material comprises the following steps: homogenizing 50 parts by weight of graphene oxide dispersion liquid, 3 parts by weight of emulsifier and 3 parts by weight of water to obtain a water phase; homogenizing 40 parts by weight of silane monomer and 10 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at 50 ℃ and 400rpm, and then continuing stirring for 6h to obtain the graphene oxide/silane composite material.
The emulsifier is formed by mixing tween-80 and propylene glycol monomethyl ether according to the mass ratio of 5: 1.
The silane monomer is formed by mixing isobutene triethoxysilane and isooctyl triethoxysilane according to the mass ratio of 1: 1.
The dispersant is acrylic acid.
Test example 1
Six different positions on each sample of examples 1-3 were measured by a DSA25 contact angle instrument and averaged.
Table 1 hydrophobicity testing
| Contact angle theta | |
| Example 1 | 139.5 |
| Example 2 | 144.3 |
| Example 3 | 166.5 |
Note: if θ <90 °, the solid surface is hydrophilic, i.e. the liquid wets the solid more easily, with smaller angles indicating better wetting; if θ >90 °, the solid surface is hydrophobic, i.e. the liquid does not easily wet the solid and easily moves over the surface. If theta is larger than 150 degrees, the solid surface has super-hydrophobic property.
From table 1, it can be seen that the hydrophobic property of the surface of the foam concrete can be improved by adopting the graphene oxide/silane composite material provided by the invention, and the waterproof effect of the surface of the foam concrete is greatly improved. The reason for this may be: the graphene oxide promotes the generation of an ettringite crystal, which is a silicate cement hydration product on the surface of the foam concrete, and greatly improves the surface micro-roughness of the foam concrete; meanwhile, the silane reduces the surface energy, so that the silane obtains stronger super-hydrophobic property.
Test example 2
Water Absorption Test Water Absorption tests were carried out on the samples of examples 3, 4 with reference to the Test Method specified in ASTM C1585-2013< Standard Test Method for measuring of Rate Absorption of Water by Hydraulic details Conscretes >.
TABLE 2 Water absorption test
| Water absorption g.m after 24h2·h-0.5 | |
| Example 3 | 32400 |
| Example 4 | 1235 |
The environment-friendly waterproof heat-insulation construction method can provide good waterproof effect and heat-insulation effect; however, the foam concrete has a certain capillary water absorption effect, and is easy to absorb indoor water vapor, so that the heat insulation effect of the foam concrete heat insulation layer is poor. Therefore, in the prior art, a layer of airtight and watertight high polymer waterproof material is paved on the roof, or high polymer waterproof paint is coated on the roof, so as to prevent indoor water vapor from permeating into the heat insulation layer.
One of the technical problems to be solved by the present invention is to reduce the usage of high molecular polymer waterproof paint and high molecular polymer waterproof material, and reduce the problem of organic volatile compounds (VOC), and provide an environment-friendly waterproof and heat-insulating construction method. As can be seen from Table 2, by adding silicone to the foam concrete formulation of the present invention, the overall hydrophobicity of the foam concrete can be effectively improved, and the capillary water absorption of the foam concrete can be reduced. Meanwhile, the graphene oxide/silane composite material on the surface can still provide a waterproof effect for the wall surface after being damaged.
Test example 3
The crack resistance test refers to the research on the early deformation and crack resistance test of steel fiber fly ash lightweight aggregate concrete, namely Leperong, the early crack resistance test method specified in 2016, volume 41, phase 5 of Highway engineering, which tests the foam concrete of examples 3 and 4, wherein the experimental age is 3 days and is recorded for 1 time every 0.5 h.
TABLE 3 Water absorption test
| First cracking time/h | Total area of cracking/(mm)2·m-2) | |
| Example 3 | 43 | 3.12 |
| Example 4 | Is not cracked | 0 |
As can be seen from table 3, by adding silicone to the foam concrete formulation of the present invention, the crack resistance of the foam concrete can be effectively improved, and the possibility of the decrease of the waterproof and thermal insulation effects due to the cracks generated in the foam concrete is reduced.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. The environment-friendly waterproof heat-insulation construction method comprises the following steps of base layer treatment → heat-insulation layer pouring → waterproof treatment, and is characterized in that the waterproof treatment is to brush graphene oxide/silane composite material on the surface of the heat-insulation layer.
2. The construction method of environmental protection, water proofing and heat preservation according to claim 1, characterized by comprising the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 pouring an insulating layer: 80-120 parts by weight of cement, 5-30 parts by weight of fly ash, 2-5 parts by weight of water reducing agent, 2-6 parts by weight of accelerator and 35-50 parts by weight of water are mixed at a rotating speed of 100-300 rpStirring for 1-3 min under the condition of m to obtain cement paste, mixing 2-4 parts by weight of foaming agent, 0.08-0.20 part by weight of foaming stability and 40-60 parts by weight of water for foaming for 2-8 min to obtain foam, stirring the cement paste and the foam for 3-7 min under the condition of the rotating speed of 20-100 rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by using a pipeline pump, pouring by self-flowing, scraping by using a scraping bar, and watering for 1 time every 8-12 hours after 12-24 hours, wherein the dosage of each time is 0.2-0.8L/m2Maintaining for 4-10 days;
s3 waterproof treatment: coating a graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the using amount of the graphene oxide/silane composite material is 200-800 g/m2And curing for 4-10 days.
3. The construction method of environmental protection, water proofing and heat preservation according to claim 1, characterized by comprising the following steps:
s1 base layer processing: leveling the protruding part of the building base layer, cleaning dust with a brush, washing with water, and naturally drying;
s2 casting the heat-insulating layer, namely stirring 80-120 parts by weight of cement, 5-30 parts by weight of fly ash, 5-12 parts by weight of silicone, 2-5 parts by weight of water reducing agent, 2-6 parts by weight of accelerator and 35-50 parts by weight of water for 1-3 min under the condition of the rotation speed of 100-300 rpm to obtain cement paste, mixing 2-4 parts by weight of foaming agent, 0.08-0.20 part by weight of foaming stabilizer and 40-60 parts by weight of water for foaming for 2-8 min to obtain foam, stirring the cement paste and the foam for 3-7 min under the condition of the rotation speed of 20-100 rpm to obtain foam concrete paste, conveying the foam concrete paste to a construction area by using a pipeline pump, casting by self-flowing, leveling by using a scraping bar, watering for 1 time every 8-12 hours after 12-24 hours, wherein the dosage is 0.2-0.8L/m each time2Maintaining for 4-10 days;
s3 waterproof treatment: coating a graphene oxide/silane composite material on the surface of the foam concrete after the maintenance, wherein the using amount of the graphene oxide/silane composite material is 200-800 g/m2And curing for 4-10 days.
4. The environment-friendly waterproof heat-preservation construction method as claimed in claim 2 or 3, characterized in that: the water reducing agent is any one of an aliphatic water reducing agent, a polycarboxylic acid water reducing agent and an aminosulfonate water reducing agent.
5. The environment-friendly waterproof heat-preservation construction method as claimed in claim 2 or 3, characterized in that: any one of sodium metaaluminate, magnesium silicate, aluminum sulfate, copper sulfate and zinc sulfate is used as the accelerator.
6. The construction method of environmental protection, water proofing and heat preservation according to claim 2 or 3, characterized in that the foaming agent is one of sodium dodecyl sulfate, α -sodium alkenyl sulfonate and sodium dodecyl benzene sulfonate.
7. The environment-friendly waterproof heat-preservation construction method as claimed in claim 2 or 3, characterized in that: the foaming stabilizer is calcium stearate and/or triethanolamine oleate.
8. The environmental protection waterproof heat preservation construction method of claim 1 or 2 or 3, characterized in that: the graphene oxide/silane composite material is prepared by homogenizing 40-60 parts by weight of graphene oxide dispersion liquid, 1-5 parts by weight of emulsifier and 1-5 parts by weight of water to obtain a water phase; homogenizing 30-50 parts by weight of silane monomer and 7-15 parts by weight of dispersant to obtain an oil phase; adding the oil phase into the water phase at the temperature of 45-60 ℃ and the rpm of 300-600, and continuously stirring for 4-9 hours to obtain the graphene oxide/silane composite material.
9. The construction method of environmental protection, water proofing and heat preservation as claimed in claim 8, wherein: the emulsifier is one or the combination of two or more of tween-80, propylene glycol methyl ether, sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
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