CN113402243A - Method for improving durability of concrete product by using carbonized coating - Google Patents
Method for improving durability of concrete product by using carbonized coating Download PDFInfo
- Publication number
- CN113402243A CN113402243A CN202110700668.7A CN202110700668A CN113402243A CN 113402243 A CN113402243 A CN 113402243A CN 202110700668 A CN202110700668 A CN 202110700668A CN 113402243 A CN113402243 A CN 113402243A
- Authority
- CN
- China
- Prior art keywords
- carbonized
- parts
- coating
- durability
- improving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 102
- 239000011248 coating agent Substances 0.000 title claims abstract description 98
- 239000004567 concrete Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000003763 carbonization Methods 0.000 claims abstract description 50
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 9
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 7
- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims abstract 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 22
- 239000000920 calcium hydroxide Substances 0.000 claims description 22
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 7
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 7
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 7
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims description 4
- ARHMMDOXGIIARL-UHFFFAOYSA-N calcium;dihydroxy(dioxido)silane Chemical compound [Ca+2].O[Si](O)([O-])[O-] ARHMMDOXGIIARL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- FZVXUPLDQNBUQZ-UHFFFAOYSA-N [Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] FZVXUPLDQNBUQZ-UHFFFAOYSA-N 0.000 claims description 3
- 235000012241 calcium silicate Nutrition 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229920002101 Chitin Polymers 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 230000036961 partial effect Effects 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 44
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 16
- 230000003628 erosive effect Effects 0.000 description 14
- 238000005507 spraying Methods 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 10
- 239000007787 solid Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 5
- 229910052939 potassium sulfate Inorganic materials 0.000 description 5
- 235000011151 potassium sulphates Nutrition 0.000 description 5
- 239000012047 saturated solution Substances 0.000 description 5
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 5
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical compound [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
- 239000004137 magnesium phosphate Substances 0.000 description 1
- 229960002261 magnesium phosphate Drugs 0.000 description 1
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 1
- 235000010994 magnesium phosphates Nutrition 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
-
- 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
- C04B41/5076—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 masses bonded by inorganic cements
- C04B41/5083—Slag 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
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The invention discloses a method for improving the durability of a concrete product by utilizing a carbonized coating, which comprises the following steps: uniformly mixing 80-100 parts of carbonized active cementing material, 0-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water to obtain carbonized coating; and coating the carbonized coating on the surface of the product matrix, and standing and carbonizing to obtain the concrete product coated with the carbonized coating. By introducing the auxiliary calcium source, the invention can shorten the carbonization time, is beneficial to improving the utilization rate and the production efficiency of the carbonization device and meets the requirements of the production process of products; the invention applies the carbonized coating prepared by the carbonized active cementing materials such as steel slag and the like to the surface of the concrete product, realizes the aim of economically, conveniently and effectively improving the durability of the concrete product by the calcium carbonate coating, widens the application range of the carbonized active cementing materials, can greatly store carbon dioxide and has obvious environmental benefit.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a method for improving the durability of a concrete product by utilizing a carbonized coating.
Background
The concrete product has good quality controllability and short production period, and is widely applied to the construction of basic facilities such as fabricated buildings, bridges, tunnels and the like. However, the concrete product is easy to corrode and further destroy and lose efficacy when being in service in areas with high contents of sulfate, chloride and the like such as saline-alkali soil, coastal areas and the like, and the service time of the concrete product is greatly shortened, so that the concrete product has important significance in improving the durability.
Generally, effective methods for improving the erosion resistance of concrete products can be divided into two categories: (1) the erosion resistance of the concrete material is improved; (2) and carrying out surface coating treatment on the concrete product. The surface coating can economically, conveniently and effectively improve the durability of the concrete product and has wide application in engineering.
The surface coating material of concrete products is various, such as silane/siloxane, epoxy resin, polyurethane, asphalt, magnesium phosphate cement and the like. Researches show that the calcium carbonate has high stability to chloride ions and sulfate ions, can obviously improve the sulfate corrosion resistance and the chloride ion corrosion resistance of concrete products when being uniformly distributed on the surface of the concrete products to form a layer film structure, and has good application prospect when being used as a coating material of the concrete products.
However, the research on improving the durability of concrete products by using a carbonized coating mainly containing calcium carbonate is only reported recently. Meanwhile, the utilization rate of the product curing device is improved, and the improvement of the production efficiency is an important part in the production process of concrete products, so that the production efficiency must be considered when the product coating is researched and developed.
Disclosure of Invention
In view of the above, it is necessary to provide a method for improving the durability of a concrete product by using a carbonized coating, so as to solve the technical problems of low efficiency and low utilization rate of curing devices in the prior art.
The invention provides a method for improving the durability of a concrete product by utilizing a carbonized coating, which comprises the following steps:
s1, uniformly mixing 80-100 parts of carbonized active cementing material, 0-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water to obtain carbonized coating;
and S2, coating the carbonized coating on the surface of the product substrate, and standing and carbonizing to obtain the concrete product coated with the carbonized coating.
Compared with the prior art, the invention has the beneficial effects that:
by introducing the auxiliary calcium source, the invention can shorten the carbonization time, is beneficial to improving the utilization rate and the production efficiency of the carbonization device and meets the requirements of the production process of products; the invention applies the carbonized coating prepared by the carbonized active cementing materials such as steel slag and the like to the surface of the concrete product, realizes the aim of economically, conveniently and effectively improving the durability of the concrete product by the calcium carbonate coating, widens the application range of the carbonized active cementing materials, can greatly store carbon dioxide and has obvious environmental benefit.
Drawings
FIG. 1 is a process flow diagram of one embodiment of a method of the present invention for improving the durability of a concrete article using a carbonized coating;
FIG. 2 is a graph of a steam curing schedule for a steam concrete product used in the present invention;
FIG. 3 is a graph showing the autoclave curing system of the autoclaved concrete article used in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for improving durability of a concrete product using a carbonized coating, comprising the steps of:
s1, uniformly mixing 80-100 parts of carbonized active cementing material, 0-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water to obtain carbonized coating;
and S2, coating the carbonized coating on the surface of the product substrate, and standing and carbonizing to obtain the concrete product coated with the carbonized coating.
According to the invention, after water accounting for 25-45% of the total amount of the carbonization active cementing material and the auxiliary calcium source is added, the prepared coating has good fluidity, the coating process is more favorably realized, the formed coating has good compactness, and the water content can be reduced and the carbonization effect can be improved through the standing process. The low water content of the coating causes poor coating fluidity, finally causes poor coating compactness, and reduces the durability improving capability of the coating; too high a water content of the coating will not facilitate carbonization and will also reduce the ability of the coating to improve durability.
In this embodiment, the carbonized active cementing material is one or more of steel slag powder, gamma-dicalcium silicate, monocalcium silicate and tricalcium disilicate; the auxiliary calcium source is calcium hydroxide; the carbonized layer intensifier is one or more of polyethylene glycol, polyvinyl alcohol, chitin and carboxymethyl cellulose; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent. The method utilizes calcium hydroxide as an auxiliary calcium source, can shorten the carbonization time, is favorable for improving the utilization rate and the production efficiency of the carbonization device, and meets the requirements of the production process of products. On one hand, the excessive calcium hydroxide can cause the system to generate high heat in the carbonization process, so that the water of the coating is evaporated, and the subsequent carbonization is not facilitated to be continued, thereby reducing the carbonization degree and being not beneficial to improving the compactness; on the other hand, high content of calcium hydroxide tends to result in incomplete carbonization, while non-carbonized calcium hydroxide is disadvantageous in improving durability.
In this embodiment, the raw materials of the carbonized coating, calculated by mass percent, include: 80-100 parts of carbonized active cementing material, 10-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water.
In the present embodiment, the product substrate is at least one of a hardened concrete product, cement paste, and mortar product. Further, the hardened concrete product is a room temperature cured product, a steam cured product, or an autoclave cured product, preferably a steam cured product or an autoclave cured product, more preferably an autoclave cured product. The method of the invention is particularly suitable for improving the durability of steam cured concrete products.
In this embodiment, the coating mode is not limited by the present invention, and those skilled in the art can make routine selections as needed. For example, the coating is at least one of spraying, knife coating, or brush coating; the coating thickness is 0.2-2.0 mm.
In the embodiment, the temperature in the standing process is 5-50 ℃, the relative humidity is 10% -50%, and the time is 5-120 min.
In the embodiment, in the carbonization process, the temperature of the carbonization environment is 5-50 ℃, the relative humidity is 50-100%, the concentration of carbon dioxide is 80-99%, and CO is2The gas partial pressure is 0.1-0.5MPa, and the carbonization time is 4-24 h. Further, the carbonization time is 4-10 h.
For avoiding redundancy, the concrete products in the following embodiments of the present invention include normal temperature cured products, steam cured products and autoclave cured products; respectively obtained by the following steps:
curing the product at normal temperature: the proportion of the components of the concrete products with different strength grades is shown in table 1. Mixing the weighed components according to the proportion, stirring uniformly, and respectively pouring the mixture into a container with the thickness of 100mm multiplied by 100mm and a container with the thickness of 100mm multiplied by 100mm
The mould is molded in a vibration mode; then sealing and curing for 24 hours, demoulding, transferring to a curing chamber with the temperature of 20 +/-0.5 ℃ and the humidity of 95 +/-0.5 percent, and curing for 7 days; and finally, polishing and removing the floating slurry with the thickness of 0.1-0.2mm on the surface of the test block, and then wiping the test block with a wet rag for later use. Wherein, the concrete test block of 100mm multiplied by 100mm is used for the performance test of sulfate erosion resistance,
the test block is used for testing the corrosion resistance of the chloride ions.
| Numbering | Cement | Water (W) | Sand | Crushing stone | Water reducing agent |
| C30 | 380 | 159.6 | 744 | 1116 | 1.9 |
| C50 | 480 | 153.6 | 726 | 1089 | 3.9 |
| C80 | 550 | 137.5 | 724 | 1087 | 8.3 |
Wherein, the cement is the commercially available P.I 52.5 cement; the water is tap water; the sand is commercial river sand, and fineness modulus of the sand adopted by C30, C50 and C80 is 2.3, 2.6 and 2.5 respectively; the crushed stone is commercially available continuous graded crushed stone, and the crushed stones adopted by C30, C50 and C80 are respectively continuous graded limestone crushed stone with the grain sizes of 5-31.5mm, 5-20mm and 5-20 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 20%, and the water content in the water reducing agent is not counted in the weight part of water.
Steam curing the product: the proportion of each component of the Z30, Z50 and Z80 grade concrete products cured by steam is respectively the same as the proportion of C30, C50 and C80 grade concrete products cured at normal temperature, and the curing system is shown in figure 2.
Pressing and steaming to maintain the product: the proportions of the components of autoclaved grade-Y30, autoclaved grade-Y50 and autoclaved grade-Y80 concrete products are respectively the same as the proportions of normal-temperature cured grade-C30, grade-C50 and grade-C80 concrete products, and the curing system is shown in figure 3.
Example 1
(1) Mixing 90 parts of converter steel slag powder, 10 parts of calcium hydroxide, 0.1 part of polyvinyl alcohol (PVA), 0.2 part of sodium carboxymethylcellulose (CMC), 4 parts of water reducing agent and 34 parts of tap water, and uniformly mixing to obtain a carbonized coating; wherein the calcium hydroxide is chemical pure grade calcium hydroxide, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 40%, and the water content in the water reducing agent is not counted in the weight part of water;
(2) uniformly spraying the carbonized coating on a concrete test block by a paint spraying gun, controlling the spraying thickness to be 0.8-1.2mm, standing the sprayed test block for 30 minutes in an environment with the temperature of 20 +/-0.5 ℃ and the relative humidity of 45 +/-0.5%, and then putting the test block in a carbonization bucket for carbonization to obtain the concrete test block coated with the carbonized coating. Wherein the environmental temperature of the carbonization barrel is 20 +/-0.5 ℃, the carbonization humidity is controlled to be about 75 percent by potassium sulfate saturated solution, the concentration and the pressure of carbon dioxide are respectively 99 percent and 0.3MPa, and the carbonization time is 10 hours.
Example 2
(1) Mixing 100 parts of converter steel slag powder, 0.1 part of polyvinyl alcohol (PVA), 0.2 part of sodium carboxymethylcellulose (CMC), 6 parts of a water reducing agent and 28 parts of tap water, and uniformly mixing to obtain a carbonized coating; wherein the calcium hydroxide is chemical pure grade calcium hydroxide, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 40%, and the water content in the water reducing agent is not counted in the weight part of water;
(2) and (3) coating the carbonized coating on a concrete test block by scraping, wherein the scraping thickness is controlled to be 0.8-1.2mm, then standing the scraped test block for 30 minutes in an environment with the temperature of 20 +/-0.5 ℃ and the relative humidity of 45 +/-0.5%, and then putting the test block into a carbonization barrel for carbonization to obtain the concrete test block coated with the carbonized coating. Wherein the environmental temperature of the carbonization barrel is 20 +/-0.5 ℃, the carbonization humidity is controlled to be about 75 percent by potassium sulfate saturated solution, the concentration and the pressure of carbon dioxide are respectively 99 percent and 0.3MPa, and the carbonization time is 18 hours.
Example 3
(1) Mixing 80 parts of converter steel slag powder, 20 parts of calcium hydroxide, 0.7 part of polyvinyl alcohol (PVA), 1.3 parts of sodium carboxymethylcellulose (CMC), 1 part of water reducing agent and 45 parts of tap water, and uniformly mixing to obtain a carbonized coating; wherein the calcium hydroxide is chemical pure grade calcium hydroxide, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 40%, and the water content in the water reducing agent is not counted in the weight part of water;
(2) brushing the carbonized coating on a concrete test block, controlling the brushing thickness to be 0.8-1.2mm, standing the brushed test block for 120 minutes in an environment with the temperature of 20 +/-0.5 ℃ and the relative humidity of 45 +/-0.5%, and then putting the test block in a carbonization barrel for carbonization to obtain the concrete test block coated with the carbonized coating. Wherein the environmental temperature of the carbonization barrel is 20 +/-0.5 ℃, the carbonization humidity is controlled to be about 75 percent by potassium sulfate saturated solution, the concentration and the pressure of carbon dioxide are respectively 99 percent and 0.3MPa, and the carbonization time is 4 hours.
Comparative example 1
(1) Mixing 100 parts of converter steel slag powder, 0 part of calcium hydroxide, 0.1 part of polyvinyl alcohol (PVA), 0.2 part of sodium carboxymethylcellulose (CMC), 4 parts of water reducing agent and 34 parts of tap water, and uniformly mixing to obtain a carbonized coating; wherein the calcium hydroxide is chemical pure grade calcium hydroxide, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 40%, and the water content in the water reducing agent is not counted in the weight part of water;
(2) uniformly spraying the carbonized coating on a concrete test block by a paint spraying gun, controlling the spraying thickness to be 0.8-1.2mm, standing the sprayed test block for 30 minutes in an environment with the temperature of 20 +/-0.5 ℃ and the relative humidity of 45 +/-0.5%, and then putting the test block in a carbonization bucket for carbonization to obtain the concrete test block coated with the carbonized coating. Wherein the environmental temperature of the carbonization barrel is 20 +/-0.5 ℃, the carbonization humidity is controlled to be about 75 percent by potassium sulfate saturated solution, the concentration and the pressure of carbon dioxide are respectively 99 percent and 0.3MPa, and the carbonization time is 16 h.
Comparative example 2
(1) Mixing 60 parts of converter steel slag powder, 40 parts of calcium hydroxide, 0.1 part of polyvinyl alcohol (PVA), 0.2 part of sodium carboxymethyl cellulose (CMC), 4 parts of water reducing agent and 34 parts of tap water, and uniformly mixing to obtain a carbonized coating; wherein the calcium hydroxide is chemical pure grade calcium hydroxide, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent with the solid content of 40%, and the water content in the water reducing agent is not counted in the weight part of water;
(2) uniformly spraying the carbonized coating on a concrete test block by a paint spraying gun, controlling the spraying thickness to be 0.8-1.2mm, standing the sprayed test block for 30 minutes in an environment with the temperature of 20 +/-0.5 ℃ and the relative humidity of 45 +/-0.5%, and then putting the test block in a carbonization bucket for carbonization to obtain the concrete test block coated with the carbonized coating. Wherein the environmental temperature of the carbonization barrel is 20 +/-0.5 ℃, the carbonization humidity is controlled to be about 75 percent by potassium sulfate saturated solution, the concentration and the pressure of carbon dioxide are respectively 99 percent and 0.3MPa, and the carbonization time is 10 hours.
Test group 1
The concrete products coated with the carbonized coatings in the above examples 1 to 3 and the concrete products not coated with the carbonized coatings were evaluated for compressive strength, sulfate erosion resistance and chloride ion erosion resistance, and the test results are shown in tables 2 to 5.
Wherein, in order to test the influence of the carbonized coating on the strength of the concrete product, the part of the test block with the thickness of 100mm multiplied by 100mm is continuously maintained in a curing room with the temperature of 20 +/-0.5 ℃ and the humidity of 95 +/-0.5 percent to the age of 28 days; and 7-day test blocks are adopted for evaluating the chloride ion corrosion resistance and the sulfate corrosion resistance.
Wherein, the rapid chloride ion migration coefficient method (RCM method) of evaluating the corrosion resistance of the chloride ions is executed in the standard of the test method of the long-term performance and the durability performance of the common concrete (GB/T50082-2009).
The sulfate erosion-dry-wet cycle test is adopted for evaluating the sulfate erosion resistance, and the specific test method comprises the following steps:
s1, placing the test block in a container, and completely soaking the test block in a 5% sodium sulfate solution for 12 hours;
s2, discharging the sulfate solution by a pump until the test block is completely exposed to the air;
s3, after S2 is finished, the fan is started to blow the sulfate solution on the surface of the test block, the running time of the fan is 2 hours, and after the fan stops running, the test block is kept stand for 10 hours; then pumping 5% sodium sulfate solution into the container by a pump to S1 state;
the steps S1-S3 are a cycle of 24 hours, and the sodium sulfate solution is replaced every 14 days until the test block is obviously cracked.
TABLE 2 compressive Strength (MPa) of samples of different concrete products with/without a carbonation coating (example 1)
| Test specimen | Age of 7 days | Age of 28 days |
| C30 | 23.7 | 39.2 |
| C30 with a coating | 25.0 | 40.5 |
| C50 | 42.6 | 59.4 |
| C50 with a coating | 42.4 | 60.6 |
| C80 | 65.3 | 93.3 |
| C80 with a coating | 66.0 | 94.2 |
| Z30 | 29.1 | 37.3 |
| Z30 with a coating | 29.5 | 39.7 |
| Z50 | 48.9 | 58.7 |
| Z50 with a coating | 49.3 | 58.6 |
| Z80 | 70.1 | 89.8 |
| Z80 with a coating | 71.6 | 90.4 |
| Y30 | 38.7 | 37.2 |
| Y30 with a coating | 38.2 | 38.3 |
| Y50 | 56.3 | 57.7 |
| Y50 with a coating | 58.7 | 59.1 |
| Y80 | 85.4 | 87.5 |
| Y80 with a coating | 86.1 | 88.4 |
As can be seen from the results in Table 2, the carbonized coating has no adverse effect on the strength of the concrete products of different curing systems in 7 days and 28 days, and has small contribution to the strength of the concrete products. It follows that the treatment of the surface of the concrete article by means of the carbonised coating does not adversely affect the use of the concrete article component, and therefore the technical process is feasible in the manufacture and application of concrete articles.
TABLE 3 durability test of concrete products of Normal temperature group in each example
Table 4 durability test of concrete products in steam-cured groups in examples
TABLE 5 concrete product durability test of autoclave set in each example
As can be seen from the results in tables 3-5, the carbonized coating layer can significantly improve the durability of concrete products of different curing systems. In the aspect of sulfate erosion resistance, the carbonized coating can improve the sulfate erosion resistance of the concrete product, and particularly can obviously improve the sulfate erosion resistance of the low-strength concrete; the concrete article coated with the carbonized coating has a chloride diffusion coefficient significantly lower than that of the uncoated treated concrete article in terms of resistance to chloride ion attack.
The three coating modes of spraying, blade coating and brush coating can achieve the purpose of improving the sulfate erosion resistance and the chloride ion erosion resistance of the concrete product.
Furthermore, from the results shown in tables 2 to 5, it is clear that steam curing, particularly autoclaving, can significantly improve the early compressive strength of the concrete product, but has a large negative effect on the sulfate attack resistance and chloride ion attack resistance of the concrete product. After the concrete subjected to steam curing and autoclaving curing is subjected to surface carbonization coating treatment, the sulfate corrosion resistance and the chloride ion corrosion resistance of the concrete are both remarkably improved, and the chloride ion diffusion coefficient of the concrete is lower than that of the concrete subjected to normal-temperature curing and surface coating-free treatment in the same grade, so that the surface carbonization coating can overcome the adverse effects of low sulfate corrosion resistance and low chloride ion corrosion resistance on concrete products caused by steam curing, particularly autoclaving curing.
The concrete products of the autoclave group of the concrete products coated with the carbonized coatings in the comparative examples 1-2 were evaluated for compressive strength, sulfate erosion resistance and chloride ion erosion resistance by the method of test group 1, and the test results are shown in table 6.
TABLE 6
As can be seen from the data in Table 6, the addition of calcium hydroxide can shorten the carbonization time and improve the production efficiency without affecting the product performance; if the amount of calcium hydroxide added is too large, the durability will be significantly reduced.
Compared with the prior art, the invention has the beneficial effects that:
(1) the coating coated on the surface of the cement-based product forms a compact and hard protective layer on the surface of the product after carbonization treatment, can well isolate harmful ions in an erosion environment, can effectively prevent the concrete product from being eroded, and improves the durability of the concrete product.
(2) The steel slag powder, the gamma-type dicalcium silicate, the monocalcium silicate and the tricalcium disilicate adopted by the invention are nontoxic and harmless, the raw materials are rich, the preparation cost is low, and the economic benefit is good. Meanwhile, the steel slag powder is used as the carbonized coating material, so that the durability of concrete is improved, the resource utilization of solid wastes can be promoted, the application range of the steel slag is widened, and the environment benefit is good.
(3) The steel slag powder, the gamma-type dicalcium silicate, the monocalcium silicate and the tricalcium silicate have excellent carbonization activity and can react with CO2Reaction to form CaCO3Can utilize the high concentration CO in the factory2The flue gas is used as carbonized gas, thereby CO in the flue gas can be removed2Curing is carried out, and the environment benefit is remarkable.
(4) The coating material can be sprayed, brushed and blade-coated by adjusting the proportion, has good applicability to cement-based products with complex structures and shapes, can be widely applied to concrete prefabricated parts of projects such as railways, bridges, tunnels and the like, and has simple process and easy realization of required construction conditions.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A method of improving the durability of a concrete article using a carbonized coating, comprising the steps of:
uniformly mixing 80-100 parts of carbonized active cementing material, 0-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water to obtain carbonized coating;
and coating the carbonized coating on the surface of a product substrate, and standing and carbonizing to obtain the concrete product coated with the carbonized coating.
2. The method for improving the durability of a concrete product by utilizing the carbonized coating according to claim 1, wherein the raw materials of the carbonized coating comprise, by mass percent: 80-100 parts of carbonized active cementing material, 10-20 parts of auxiliary calcium source, 0.1-2.0 parts of carbonized layer reinforcing agent, 1-6 parts of water reducing agent and 25-45 parts of water.
3. The method for improving the durability of concrete products by using the carbonized coating according to claim 1 or 2, wherein the carbonized active cementing material is one or more of steel slag powder, gamma-type dicalcium silicate, monocalcium silicate and tricalcium disilicate.
4. The method for improving the durability of a concrete product using a carbonized coating according to claim 1 or 2, wherein the auxiliary calcium source is calcium hydroxide.
5. The method for improving the durability of a concrete product by using the carbonized coating according to claim 1 or 2, wherein the carbonized layer reinforcing agent is one or more of polyethylene glycol, polyvinyl alcohol, chitin and carboxymethyl cellulose.
6. The method for improving the durability of the concrete product by utilizing the carbonized coating according to claim 1 or 2, characterized in that the water reducing agent is a polycarboxylic acid type high efficiency water reducing agent.
7. The method for improving the durability of a concrete product by using a carbonized coating according to claim 1 or 2, characterized in that the product matrix is at least one of a hardened concrete product or a cement paste, a mortar product.
8. The method for improving the durability of a concrete product using a carbonized coating according to claim 7, wherein said hardened concrete product is a room temperature cured product, a steam cured product or an autoclave cured product.
9. The method for improving the durability of a concrete product by using a carbonized coating according to claim 1, wherein the temperature of the standing process is 5-50 ℃, the relative humidity is 10% -50%, and the time is 5-120 min.
10. The method for improving the durability of a concrete product by using a carbonized coating according to claim 1, wherein the temperature of the carbonization environment is 5-50 ℃, the relative humidity is 50% -100%, the carbon dioxide concentration is 80% -99%, and CO is added during the carbonization process2The gas partial pressure is 0.1-0.5MPa, and the carbonization time is 4-24 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110700668.7A CN113402243A (en) | 2021-06-23 | 2021-06-23 | Method for improving durability of concrete product by using carbonized coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110700668.7A CN113402243A (en) | 2021-06-23 | 2021-06-23 | Method for improving durability of concrete product by using carbonized coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113402243A true CN113402243A (en) | 2021-09-17 |
Family
ID=77682705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110700668.7A Pending CN113402243A (en) | 2021-06-23 | 2021-06-23 | Method for improving durability of concrete product by using carbonized coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113402243A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979256A (en) * | 2021-02-25 | 2021-06-18 | 山东创元水务有限公司 | Concrete anti-carbonization mortar treatment process |
| CN113955992A (en) * | 2021-10-28 | 2022-01-21 | 山东汉博昱洲新材料有限公司 | Efficient carbon-absorbing mineralized aerated concrete and preparation method thereof |
| CN113999049A (en) * | 2021-11-30 | 2022-02-01 | 大连理工大学 | Preparation method of carbonate coating for protecting concrete prefabricated part |
| CN114014564A (en) * | 2021-11-17 | 2022-02-08 | 安徽海螺新材料科技有限公司 | Steel slag activator and preparation method and application thereof |
| CN114634333A (en) * | 2022-03-29 | 2022-06-17 | 宁波中淳高科股份有限公司 | Low-carbon concrete segment |
| CN114656811A (en) * | 2022-04-12 | 2022-06-24 | 武汉理工大学 | Fireproof heat-preservation heat-insulation inorganic coating material and preparation method thereof |
| CN115259737A (en) * | 2022-08-18 | 2022-11-01 | 青岛理工大学 | Titanium sol carbon-fixing auxiliary agent, preparation method and application thereof, and method for solidifying carbon by using cement-based material |
| CN115490468A (en) * | 2022-10-14 | 2022-12-20 | 山东京韵泰博新材料科技有限公司 | Protective coating for building, protection method and application |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544390A (en) * | 2009-05-07 | 2009-09-30 | 广西武鸣金峰化工科技有限公司 | A method for preparing nano calcium carbonate |
| CN104209452A (en) * | 2014-06-16 | 2014-12-17 | 芜湖市鸿坤汽车零部件有限公司 | Modified steel slag sand alcohol-based casting coating and preparation method thereof |
| CN104343122A (en) * | 2013-07-24 | 2015-02-11 | 吕孟龙 | Concrete structure protection method |
| CN110818356A (en) * | 2019-12-02 | 2020-02-21 | 武汉理工大学 | Preparation method of high-performance carbonized reinforced concrete |
| CN111320424A (en) * | 2020-01-16 | 2020-06-23 | 武汉理工大学 | Concrete structure repairing method based on carbonization hardening |
| CN111606636A (en) * | 2020-05-18 | 2020-09-01 | 湖北工业大学 | Preparation method of early-strength glutinous rice mortar material |
| CN111925675A (en) * | 2020-07-07 | 2020-11-13 | 深圳市奇信集团股份有限公司 | Concrete anti-carbonization environment-friendly coating and construction method |
| CN112897966A (en) * | 2021-02-04 | 2021-06-04 | 武汉理工大学 | Calcium carbonate-based inorganic coating and preparation and use methods thereof |
-
2021
- 2021-06-23 CN CN202110700668.7A patent/CN113402243A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544390A (en) * | 2009-05-07 | 2009-09-30 | 广西武鸣金峰化工科技有限公司 | A method for preparing nano calcium carbonate |
| CN104343122A (en) * | 2013-07-24 | 2015-02-11 | 吕孟龙 | Concrete structure protection method |
| CN104209452A (en) * | 2014-06-16 | 2014-12-17 | 芜湖市鸿坤汽车零部件有限公司 | Modified steel slag sand alcohol-based casting coating and preparation method thereof |
| CN110818356A (en) * | 2019-12-02 | 2020-02-21 | 武汉理工大学 | Preparation method of high-performance carbonized reinforced concrete |
| CN111320424A (en) * | 2020-01-16 | 2020-06-23 | 武汉理工大学 | Concrete structure repairing method based on carbonization hardening |
| CN111606636A (en) * | 2020-05-18 | 2020-09-01 | 湖北工业大学 | Preparation method of early-strength glutinous rice mortar material |
| CN111925675A (en) * | 2020-07-07 | 2020-11-13 | 深圳市奇信集团股份有限公司 | Concrete anti-carbonization environment-friendly coating and construction method |
| CN112897966A (en) * | 2021-02-04 | 2021-06-04 | 武汉理工大学 | Calcium carbonate-based inorganic coating and preparation and use methods thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979256A (en) * | 2021-02-25 | 2021-06-18 | 山东创元水务有限公司 | Concrete anti-carbonization mortar treatment process |
| CN113955992A (en) * | 2021-10-28 | 2022-01-21 | 山东汉博昱洲新材料有限公司 | Efficient carbon-absorbing mineralized aerated concrete and preparation method thereof |
| CN113955992B (en) * | 2021-10-28 | 2023-02-28 | 山东京韵泰博新材料科技有限公司 | Efficient carbon-absorbing mineralized aerated concrete and preparation method thereof |
| CN114014564A (en) * | 2021-11-17 | 2022-02-08 | 安徽海螺新材料科技有限公司 | Steel slag activator and preparation method and application thereof |
| CN113999049A (en) * | 2021-11-30 | 2022-02-01 | 大连理工大学 | Preparation method of carbonate coating for protecting concrete prefabricated part |
| CN114634333A (en) * | 2022-03-29 | 2022-06-17 | 宁波中淳高科股份有限公司 | Low-carbon concrete segment |
| CN114656811A (en) * | 2022-04-12 | 2022-06-24 | 武汉理工大学 | Fireproof heat-preservation heat-insulation inorganic coating material and preparation method thereof |
| CN114656811B (en) * | 2022-04-12 | 2023-03-14 | 武汉理工大学 | Fireproof heat-preservation heat-insulation inorganic coating material and preparation method thereof |
| CN115259737A (en) * | 2022-08-18 | 2022-11-01 | 青岛理工大学 | Titanium sol carbon-fixing auxiliary agent, preparation method and application thereof, and method for solidifying carbon by using cement-based material |
| CN115490468A (en) * | 2022-10-14 | 2022-12-20 | 山东京韵泰博新材料科技有限公司 | Protective coating for building, protection method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113402243A (en) | Method for improving durability of concrete product by using carbonized coating | |
| KR101694807B1 (en) | Mortar with chloride resistance and acid resistance for repairing and reinforcing concrete using eco-friendly green cement, finishing materials for protecting concrete surface and method for repairing and reinforcing concrete using the same | |
| CN110563370B (en) | Production process for preparing recycled aggregate from waste concrete | |
| KR101931158B1 (en) | Mortar containing phosphoric acid-based ceramic resin composition and method for repairing and surface-protecting a concrete structure using the mortar | |
| KR102173957B1 (en) | Mortar composition for reparing and reinforcing concrete structure using acid resistant microorganism and high-sulfate cement and method for reparing and reinforcing concrete structure | |
| CN110451877B (en) | Building waste concrete-brick mixed self-repairing concrete and preparation method thereof | |
| CN110041035B (en) | C30 high-impermeability concrete with low consumption of rubber materials and preparation method thereof | |
| CN112028565A (en) | Recycled coarse aggregate seawater sea sand concrete and preparation method and application thereof | |
| CN109694224B (en) | High-durability concrete product with gradient structure and preparation method thereof | |
| CN113061002B (en) | High-durability micro-expansion green prestressed duct grouting material and preparation method thereof | |
| KR102610286B1 (en) | Manufacturing method for crack self-healing repair mortars with improved carbonation and salt resistance capacities | |
| CN108178609B (en) | Sea sand coating slurry capable of curing chloride ions and reinforcing method | |
| CN111620665A (en) | Low-shrinkage and carbonization-resistant steel slag geopolymer concrete | |
| CN113321531A (en) | Water-based double-component concrete sealing curing agent | |
| CN113929388A (en) | Wear-resistant anti-cracking cement mortar and preparation method thereof | |
| CN115321895A (en) | Anti-corrosion concrete and preparation method thereof | |
| Tripathi et al. | Bacterial based admixed or spray treatment to improve properties of concrete | |
| CN113461388B (en) | GO-TiO 2 Nano-fluid modified high-density self-cleaning concrete and preparation method thereof | |
| CN110590298B (en) | Acid rain freezing-resistant repair material for concrete structure of rail transit engineering | |
| CN114685140B (en) | Ecological protection layer for improving concrete durability, preparation method and application thereof | |
| CN112408878B (en) | Pressure-resistant geopolymer composite material and preparation method of pressure-resistant geopolymer using same | |
| CN101450846A (en) | Composite type slag powder and production method thereof | |
| CN113929397A (en) | High-impermeability freeze-thaw-resistance microbial concrete and preparation method thereof | |
| KR101750033B1 (en) | Eco-friendly materials containing concrete surface treatment composition and surface treatment method using the same | |
| KR100933224B1 (en) | Composition of polymer mortar and repair method of concrete structures using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210917 |
|
| RJ01 | Rejection of invention patent application after publication |