CN102092999B - Process method for chopped fiber reinforced aerated concrete - Google Patents
Process method for chopped fiber reinforced aerated concrete Download PDFInfo
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- CN102092999B CN102092999B CN 201010579074 CN201010579074A CN102092999B CN 102092999 B CN102092999 B CN 102092999B CN 201010579074 CN201010579074 CN 201010579074 CN 201010579074 A CN201010579074 A CN 201010579074A CN 102092999 B CN102092999 B CN 102092999B
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- concrete
- chopped strand
- resin
- steam
- pressing aero
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- 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
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/40—Surface-active agents, dispersants
- C04B2103/408—Dispersants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a process method for chopped fiber reinforced aerated concrete. A process for sequentially coating resin and inorganic compound particles on a fiber surface and adding coated chopped fibers and a dispersing agent into mixed slurry of autoclaved aerated concrete before the resin is cured is adopted, so that heat resistance and alkali resistance are improved, the bonding problem of the chopped fibers and a substrate and the dispersing problem of the chopped fibers are solved, and the reinforcing function of the chopped fibers can be brought into full play during high-temperature and high-pressure curing of the autoclaved aerated concrete. The aerated concrete reinforced by the method can keep the original light and heat preservation properties, and has the advantage of high intensity. By the reinforcing method, the formula of the original aerated concrete is not required to be changed; and the method is simple and practicable.
Description
Technical field
The present invention relates to the light thermal-insulation building material technical field, particularly a kind of enhancement type steam-pressing aero-concrete.
Background technology
Steam-pressing aero-concrete is to be main raw material with materials such as siliceous raw material such as calcareous raw materials such as lime, silica sand and cement, mixes with water with certain ratio of water to material, adds the whipping agent foaming again, treat the sclerosis cutting after, the goods of steam-cured gained under HTHP.Steam-pressing aero-concrete has a series of premium properties: light weight, thermal conductivity is less, thermal and insulating performance good; Can reduce the thickness of body of wall and the sole mass of buildings; Thereby dwindled the key dimension of buildings, improved the utilization ratio in soil, saved material.Simultaneously, steam-pressing aero-concrete can also improve the efficient of building operation, reduces the cost of construction.In addition, because the deadweight of whole buildings has descended, its shockproof ability has also just improved, thereby further promotes the dwelling house modernization process.Therefore, autoclave aerated concrete building block is one of novel wall material product of state key encourage growth.
But because steam-pressing aero-concrete contains numerous air-bubble, proportion is little, light weight, and it is big also to enbrittle simultaneously, and intensity is low, the shortcoming of toughness and shock resistance difference.There is the low problem of intensity in the steam-pressing aero-concrete of being not only the maintenance completion, and steam-cured preceding expanded moldings also is very easy to occur defective because intensity is very low in cutting action.
Adding of fiber can improve its tensile strength, bending strength and toughness in sand-cement slurry and concrete.Some patents also provide such method.As: with the combined wall board and the method for manufacture (publication number: CN1364968) of waste textile fibre reinforced concrete side surface; The making method of fibre reinforced concrete manhole cover (publication number: CN 1401860); High performance concrete reinforced by assorted fiber (publication number: CN 1686906); Be used to obtain have the prescription (publication number: CN 101309879) of the fiber reinforced concrete mixture of high mechanical strength and low unit weight, ultrahigh-strength fiber-reinforced cement composition, ultrahigh-strength fiber-reinforced mortar or concrete and ultrahigh-strength cement admixture (publication number: CN101160268).The fiber that is adopted in these patents has steel fiber, spun glass, waste spinning textured fiber, low elastic modulus fiber etc.
Though, existed some staple fibres to strengthen the patent of normal concrete, because preparation, the moulding process of gas concrete and normal concrete have very big difference, some above-mentioned staple fibres can not directly be used for the enhancing of steam-pressing aero-concrete.The preparation of steam-pressing aero-concrete is that the alkaline components in whipping agent and the slip reacts, and generates the process of hydrogen.Therefore, the slip alkalescence of steam-pressing aero-concrete is bigger, far above concrete alkalescence.In addition, steam-pressing aero-concrete needs the steam press maintenance of HTHP.For example, meta-aramid fibers is used for steam-pressing aero-concrete, owing to be heated and the effect of alkali, the aramid fiber performance degradation can not be brought into play reinforced effects preferably.Even and steel fiber has passed through antirust processing in use, in the life-time service process, the problem that reinforced effects reduces can appear also.Fibrous magnesium silicate is because the meeting cause cancer also is difficult to enhancing now.Therefore, strengthen in the technological process of gas concrete at chopped strand, it is very crucial in the problem alkaline-resisting, high temperature high voltage resistant of fiber in the gas concrete preparation how to solve chopped strand.
Adopting chopped strand to strengthen in the concrete process; Hindering chopped strand, to give full play to the major cause of reinforced effects be that chopped strand is agglomerating easily and divide uneven; Particularly under the bigger situation of the length of fiber volume rate and staple fibre, this severity also increases thereupon.At present mainly through technologies such as gunitees to overcome this shortcoming.When adopting staple fibre to strengthen steam-pressing aero-concrete; The reunion of fiber directly influences the forming process of the bubble of getting angry; Thereby influence the intensity and the heat-insulating property of aperture, distribution and the steam-pressing aero-concrete of pore, so the scattering problem of chopped strand in steam-pressing aero-concrete is the major issue that especially need solve.
Summary of the invention:
When strengthening steam-pressing aero-concrete for the staple fibre that solves the prior art existence; Fiber dispersion is bad; And the shortcoming that fiber incompatibility gas concrete is alkaline, HTHP requires; Of the present invention a kind of process method that chopped strand strengthens gas concrete that is used for is provided, can have obtained the steam-pressing aero-concrete that good dispersivity, alkali resistance, intensity that high temperature high voltage resistant property is good increase.
Technical scheme of the present invention is: a kind of process method that is used for chopped strand enhancing gas concrete; At chopped strand surface application of resin successively, inorganic compound particles; And when resin is still unhardened; The chopped strand and the dispersion agent that apply after handling are added in the mixed slurry of steam-pressing aero-concrete, press the ordinary method moulding, just support sclerosis and steam-cured processing, described chopped strand is p-aramid fiber or basalt chopped fiber.
Described resin is any one in acrylic resin, epoxy-phenolic resin, epoxy resin, the furans-epoxy resin.
Described epoxy resin is linear, aliphatic epoxy resin.
Described mineral compound with CEC and adsorptivity is any one in silicon-dioxide, aluminium sesquioxide, zirconium white, titanium oxide, the kaolin.
The diameter of described chopped strand is 6～12 μ m, length 3～12mm.
Described dispersion agent is any one in sodium lauryl sulphate, methyl amyl alcohol, derivatived cellulose, the SEPIGEL 305.
Beneficial effect
1. adopt p-aramid fiber or basalt chopped fiber to strengthen gas concrete, do not influence the heat-insulating property of steaming gas concrete after the enhancing.This is because the intensity of aramid fiber is high, toughness is big.Select higher, the good heat resistance of intensity in the aramid fiber, the kind of excellent performances such as acid-fast alkali-proof property is like para-aramid fiber.The main one-tenth SiO of basalt fibre
2, Al
2O
3, Fe
20
3, CaO, MgO, TiO
2Deng.Basalt fibre has the advantage of many uniquenesses, as outstanding mechanical property, high temperature resistant, water absorbability is low, and advantages such as good insulating, adiabatic sound-proofing properties excellence relatively are applicable in the steam-pressing aero-concrete.And the proportion of para-aramid fiber and basalt fibre is little, thermal conductivity is little, thermal insulation is good, mixes in the steam-pressing aero-concrete, can not reduce the light thermal-insulation characteristic of steam-pressing aero-concrete.
2. adopt dispersion agent to carry out pre-dispersed processing and perhaps directly dispersion agent is added in the raw material title complex of steam-pressing aero-concrete, improve the dispersiveness of chopped strand in the steam-pressing aero-concrete slip.
3. adopt the fiber surface application of resin, add the interfacial activity material and solve the problem that combines that steam-pressing aero-concrete prepares alkali-resistant problem and chopped strand with the matrix of chopped strand in the process, the intensity of raising steam-pressing aero-concrete.Adopt resin that short surface of cutting basalt fibre is applied processing, to improve the alkali-resistivity of chopped strand.In polyolefin resin, be the resin of staple with the Vestolen PP 7052, because price is low, physical and chemical performance is excellent, it is high to strengthen efficient, can be used as first-selection.In addition, also can select epoxy-phenolic resin, epoxy resin, furan nucleus-epoxy resins etc.Epoxy resin can be selected line style, aliphatic epoxy resin.Formed epithelium intensity is high more good more, and like this, resin and concrete bonding strength are higher, help improving the reinforced effects of fiber to steam-pressing aero-concrete.
4. the mineral compound that will have CEC and adsorptivity is adsorbed at fiber surface.The mineral compound ion makes chopped strand from the steam-pressing aero-concrete matrix, extract difficulty as the intermediate interface of chopped strand and steam-pressing aero-concrete, improves the reinforced effects of chopped strand.
5. the present invention mainly adopts dispersion agent that chopped strand is carried out the method for pre-dispersed processing or directly dispersion agent is added in the raw material title complex of steam-pressing aero-concrete, improves the dispersiveness of chopped strand in the steam-pressing aero-concrete slip.
6. before the steam-pressing aero-concrete preparation, the method that earlier chopped strand is proposed with the present invention is carried out resin and is applied processing.The adjustment hardening of resin time, when resin is still unhardened, the chopped strand of coated with resins is added in the mixed slurry of steam-pressing aero-concrete.Constantly harden, generate in the process of a series of silicic acid hydrates at steam-pressing aero-concrete and the steam-pressing aero-concrete matrix closely combines gradually, improve the reinforced effects of chopped strand.
Embodiment:
A kind of process method that is used for chopped strand enhancing gas concrete; Can improve the performance of chopped strand dispersed and alkali resistance, high temperature high voltage resistant in steam-pressing aero-concrete; Adopt resin and mineral compound that chopped strand is applied processing successively with CEC and adsorptivity; When resin is still unhardened, chopped strand after the coating processing and dispersion agent are added in the mixed slurry of steam-pressing aero-concrete, by ordinary method moulding, first foster the sclerosis and steam-cured processing;
Described chopped strand is p-aramid fiber or basalt chopped fiber.
Described resin is any one in acrylic resin, epoxy-phenolic resin, epoxy resin, the furans-epoxy resin.Described epoxy resin is linear, aliphatic epoxy resin.Epoxy resin can be selected the epoxy resin of the trades mark such as the CYD-128, E42, E44 of Ba Ling petrochemical iy produced for use.The YJ furane resin that furans-epoxy resin can select for use Wuxi anti-impregnating material of a specified duration ltd to produce, HF9200 furan nucleus-epoxy resins.The F-51 novolac epoxy F-44 novolac epoxy that epoxy-phenolic resin can select for use Wuxi anti-impregnating material of a specified duration ltd to produce, F-44-80 and F-53 phenolic aldehyde-epoxy resin that Jiangsu three wooden companies produce.
Before the steam-pressing aero-concrete preparation, the method that earlier chopped strand is proposed with the present invention is carried out resin and is applied processing.The adjustment hardening of resin time, when resin is still unhardened, the chopped strand of coated with resins is added in the mixed slurry of steam-pressing aero-concrete.Constantly harden, generate in the process of a series of silicic acid hydrates at steam-pressing aero-concrete and the steam-pressing aero-concrete matrix closely combines gradually.
Described mineral compound with CEC and adsorptivity is any one in silicon-dioxide, aluminium sesquioxide, zirconium white, titanium oxide, the kaolin.Inorganic compound particles can form to be coated with behind the mixture again and be attached to fiber surface with mixed with resin, also can be coated with after attaching fiber surface when still unhardened at resin, is evenly coated in fiber surface.
The diameter of described chopped strand is 6～12 μ m, length 3～12mm.
Cut basalt fibre to strengthen the key of steam-pressing aero-concrete in the preparation process be to cut in the slip that basalt fibre evenly spreads to steam-pressing aero-concrete short as far as possible with short.If chopped strand can not homodisperse in the slip of steam-pressing aero-concrete, can directly influence the mechanical property and the heat-insulating property of steam-pressing aero-concrete.The present invention mainly adopts dispersion agent that chopped strand is carried out the method for pre-dispersed processing or directly dispersion agent is added in the raw material title complex of steam-pressing aero-concrete, improves the dispersiveness of chopped strand in the steam-pressing aero-concrete slip.Dispersion agent can be selected any one in sodium lauryl sulphate, methyl amyl alcohol, derivatived cellulose, the SEPIGEL 305.
Comparative example 1:
Take by weighing flyash 544 grams, cement 96 grams, lime 128 grams, gypsum 32 grams, admixture 1.92 grams, water 560 grams, suds-stabilizing agent 0.064 gram.Casting after stirring, after precuring in 4 hours, steam press maintenance obtains steam-pressing aero-concrete again.Test its folding strength, ultimate compression strength.
Embodiment 1:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 8.08 grams.Successively acrylic resin and kaolin are coated in the short basalt fibre surface of cutting.Take by weighing the steam-pressing aero-concrete raw material same, preparation steam-pressing aero-concrete slip with comparative example 1.The weak point that resin is still uncured is cut basalt fibre and is added in the slip, adds 8 gram dispersion agents (sodium lauryl sulphate) again, the back casting that stirs, and after precuring in 4 hours, steam press maintenance obtains steam-pressing aero-concrete again.The physical and mechanical property that test is identical with comparative example 1.
Embodiment 2:
Take by weighing diameter 9 μ m, the weak point of length 6mm is cut basalt fibre 8.08 grams.Raw material weight, preparation method and technology prepare steam-pressing aero-concrete all with embodiment 1.The physical and mechanical property that test is identical with comparative example 1.
Embodiment 3:
Take by weighing diameter 9 μ m, the weak point of length 12mm is cut basalt fibre 8.08 grams.Raw material weight, preparation method and technology prepare steam-pressing aero-concrete all with embodiment 1.The physical and mechanical property that test is identical with comparative example 1.
Embodiment 4:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 2.02 grams.Raw material weight, preparation method and technology prepare steam-pressing aero-concrete all with embodiment 1.The physical and mechanical property that test is identical with comparative example 1.
Embodiment 5:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 4.04 grams.Raw material weight, preparation method and technology prepare steam-pressing aero-concrete all with embodiment 1.The physical and mechanical property that test is identical with comparative example 1.
Embodiment 6:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 12.12 grams.Raw material weight, preparation method and technology prepare steam-pressing aero-concrete all with embodiment 1.The physical and mechanical property that test is identical with comparative example 1.
The test result of the intensity of above embodiment is seen table 1
Table 1 inventive embodiments and intensity
Annotate: the implication of 1.D9L3 refers to that the short diameter of cutting basalt fibre is 9 μ m, and length is 3mm.Implication is similar therewith for other.
Can find out that by last table dispersiveness is better relatively when the length of chopped strand is relatively shorter, when the amount of fiber improved relatively, the enhanced effect also can be better.
Embodiment 7:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut para-aramid fiber 8.08 grams.Epoxy phenolics is coated in the chopped strand surface, when resin is still unhardened, silica-coated is cut the para-aramid fiber surface at weak point.Add 8 gram dispersion agents (methyl amyl alcohol) in the steam-pressing aero-concrete slip; The weak point that resin is still uncured is cut para-aramid fiber and is added the back that stirs in the slip by the ordinary method casting; Through 4 hours with maintenance after, steam press maintenance obtains steam-pressing aero-concrete again.
Embodiment 8:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 8.08 grams.Furans-epoxy coating is cut the basalt fibre surface short, when resin is still unhardened, aluminium sesquioxide is coated in the short basalt fibre surface of cutting.The weak point that resin is still uncured cut basalt fibre and 8 the gram dispersion agents (sodium cellulosate) add together stir in the slip back by the ordinary method casting, through 4 hours with maintenance after, steam press maintenance obtains steam-pressing aero-concrete again.
Embodiment 9:
Take by weighing diameter 9 μ m, the weak point of length 3mm is cut basalt fibre 8.08 grams.Epoxy resin and zirconium white are coated in the short basalt fibre surface of cutting successively; When resin is still unhardened; The weak point that resin is still uncured cuts basalt fibre and 8 gram dispersion agents (SEPIGEL 305) add the back that stirs in the slip together by the ordinary method casting; Through 4 hours with maintenance after, steam press maintenance obtains steam-pressing aero-concrete again.
Claims (5)
1. one kind is used for the process method that chopped strand strengthens gas concrete; It is characterized in that; At chopped strand surface application of resin successively, inorganic compound particles; And when resin is still unhardened, chopped strand after the coating processing and dispersion agent are added in the mixed slurry of steam-pressing aero-concrete, by ordinary method moulding, first foster the sclerosis and steam-cured processing;
Described chopped strand is p-aramid fiber or basalt chopped fiber; Described inorganic compound particles is any one in silicon-dioxide, aluminium sesquioxide, zirconium white, titanium oxide, the kaolin.
2. the process method that is used for chopped strand enhancing gas concrete as claimed in claim 1 is characterized in that described resin is any one in acrylic resin, epoxy-phenolic resin, epoxy resin, the furans-epoxy resin.
3. the process method that is used for chopped strand enhancing gas concrete as claimed in claim 2 is characterized in that described epoxy resin is linear, aliphatic epoxy resin.
4. the process method that is used for chopped strand enhancing gas concrete as claimed in claim 1 is characterized in that the diameter of described chopped strand is 6～12 μ m, length 3～12mm.
5. the process method that is used for chopped strand enhancing gas concrete as claimed in claim 1 is characterized in that described dispersion agent is any one in sodium lauryl sulphate, methyl amyl alcohol, derivatived cellulose, the SEPIGEL 305.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010579074 CN102092999B (en) | 2010-12-09 | 2010-12-09 | Process method for chopped fiber reinforced aerated concrete |
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|---|---|---|---|
| CN 201010579074 CN102092999B (en) | 2010-12-09 | 2010-12-09 | Process method for chopped fiber reinforced aerated concrete |
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| CN102092999A CN102092999A (en) | 2011-06-15 |
| CN102092999B true CN102092999B (en) | 2012-08-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2737093C2 (en) * | 2016-06-23 | 2020-11-24 | Эвоник Оперейшнс Гмбх | Reinforced building block made from autoclave hardening foam concrete (ahfc) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383501B (en) * | 2011-08-26 | 2013-08-14 | 天津师范大学 | Embedded type aerated concrete composite outer wall heat insulation board |
| CN104402505B (en) * | 2014-11-12 | 2016-08-24 | 安徽中龙建材科技有限公司 | Insulation air-entrained concrete building block and preparation method thereof |
| CN104446228A (en) * | 2014-12-23 | 2015-03-25 | 苏州万盛混凝土有限公司 | Preparation method of concrete with high fire resistance |
| RU2699249C2 (en) * | 2017-10-18 | 2019-09-04 | Общество с ограниченной ответственностью "АЛИТ-ТМ" | Method for production of reinforced articles from autoclave foam concrete and article |
| CN108275955A (en) * | 2018-04-11 | 2018-07-13 | 山东联海新型建材有限公司 | A kind of light-weighted autoclaved air entrained concrete plate material of thermal-insulating type and preparation method |
| CN112125606A (en) * | 2020-09-15 | 2020-12-25 | 国网北京市电力公司 | Process for treating fibre reinforced concrete, concrete mixed with chopped fibre bead chains |
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| CN1730854A (en) * | 2005-08-10 | 2006-02-08 | 大连理工大学 | Method for reinforcing sand adhesion strength on epoxy resin impregnated fiber woven net surface |
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| RU2737093C2 (en) * | 2016-06-23 | 2020-11-24 | Эвоник Оперейшнс Гмбх | Reinforced building block made from autoclave hardening foam concrete (ahfc) |
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