CN103058614B - Special thin anti-crack plastering mortar for autoclaved aerated concrete - Google Patents
Special thin anti-crack plastering mortar for autoclaved aerated concrete Download PDFInfo
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- CN103058614B CN103058614B CN201310030503.9A CN201310030503A CN103058614B CN 103058614 B CN103058614 B CN 103058614B CN 201310030503 A CN201310030503 A CN 201310030503A CN 103058614 B CN103058614 B CN 103058614B
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Abstract
The invention discloses a special thin anti-crack plastering mortar for autoclaved aerated concrete and belongs to the technical field of building materials. According to the special thin anti-crack plastering mortar disclosed by the invention, a dry material is added with water by a mass ratio that water to dry material ratio is equal to 1:4, and then stirred for 3-5 minutes to prepare mortar, wherein the dry material consists of the following components in mass by percentage: 20%-35% of cement, 10%-30% of 40-70-mesh quartz sand, 30%-50% of 80-100-mesh quartz sand, 2%-7% of 200-mesh coarse whiting powder, 1.5%-4% of redispersible emulsion powder; 0.15%-0.5% of water-retaining agent; 0.2%-0.7% of wood fiber and 0.11%-0.45% of short fiber. Being prepared by adopting quartz sand of 40-70 meshes or 80-100 meshes, the special thin anti-crack plastering mortar for the autoclaved aerated concrete disclosed by the invention has an excellent anti-crack performance, realizes effective control on contraction percentage of the mortar, causes no cracks during large-area construction, achieves good caking property, and realizes organic combination between the mortar and the surface layer of the autoclaved aerated concrete.
Description
Technical field
The special-purpose thin layer anti-cracking plastering of a steam-pressing aero-concrete mortar, belongs to building material technical field.
Background technology
Along with energy-saving and emission-reduction policy is in the promotion and implementation of building field and the implementation energetically of wall reform, air-entrained concrete building block because of its a series of advantage, is more and more subject to the favor in market as a kind of novel materials for wall, is widely used in construction work.
Steam-pressing aero-concrete is a kind of of gas concrete, to add aluminium powder to make air entraining agent in the batching with calcareous material (as cement, lime) and siliceous material (as sand, flyash, slag), through adding water stirring, casting, the expansion of getting angry, precuring cutting, then the porous silicate building block forming through autoclave curing.The unit weight of steam-pressing aero-concrete is 1/3rd of clay brick, and heat-insulating property is 3 ~ 4 times of clay brick, and sound-proofing properties is 2 times of clay brick, and anti-permeability performance is the more than a times of clay brick, and fire performance is 6 ~ 8 times of Steel Concrete.
But, due to characteristics such as air-entrained concrete building block self water-intake rate is large, vesicular structures, cubic deformation coefficient is bigger than normal, low strength, feature that material is more crisp, when being combined with common plastering mortar, shrinkage coefficient is inconsistent, easily make body of wall occur crack, coat of plaster produces big area be full of cracks, hollowing and the phenomenon such as come off, and has affected construction quality and building wall aesthetic.For above situation, the many enterprises of recent year and research institutions develop this and innovate, also formed the product of various formulas, the domestic national sector standard JC890-2001 that also worked out of while, yet domestic many quality producies are uneven, do not have good specific aim and practicality, aerated concrete block wall crack problem is not still solved effectively.
In order better to guarantee the quality of special plastering mortar and keep good heat-insulating property the invention provides to take that quartz sand and suitable consolidating material are the special-purpose thin layer anti-cracking plastering of the steam-pressing aero-concrete mortar that main raw material(s) is produced, its superior splitting resistance embodied in practical application technological standard and mutually coordinate, avoiding being out of shape the asynchronous hollowing cracking phenomena occurring because of both.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide a kind of and synchronize with steam-pressing aero-concrete distortion, splitting resistance, the special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete mortar that cohesiveness is strong.
The technical solution adopted for the present invention to solve the technical problems is: the special-purpose thin layer anti-cracking plastering of this steam-pressing aero-concrete mortar, is characterized in that: according to quality, than water: siccative=1:4, add water to stir 3 ~ 5min mortar processed; Described siccative mass percent is cement 20 ~ 35%, 40 ~ 70 order quartz sands 10 ~ 30% and 80 ~ 100 order quartz sand 30 ~ 50%, 200 order dicalcium powders 2 ~ 7%, redispersable latex powder 1.5 ~ 4%, water-holding agent 0.15 ~ 0.5%, xylon 0.2 ~ 0.7%, staple fibre 0.11 ~ 0.45%.Mortar first mixes siccative in use, then than water: siccative=1:4, adds water to stir 3 ~ 5min mortar processed according to quality.
Preferably, described cement is normal silicate 42.5 cement.
Described quartz sand silt content is less than 2%.
Preferably, described water-holding agent is Vltra tears.
Preferably, described staple fibre mean length is 0.6mm.
The present invention utilizes the thin layer anti-cracking plastering mortar that quartz sand and suitable consolidating material are the special use of main raw material(s) making steam-pressing aero-concrete.When this thin layer anti-cracking plastering mortar is used, base material does not need to brush any interfacial agents, does not need the enhancement process such as linked network, adopts thin layer to plaster during construction, depth of plastering is 3mm, its shrinkage value is similar to air-entrained concrete building block drying shrinkage value, and matching is good, can effectively prevent cracking of building body; Improve water retentivity of mortar, workability, density, antibiosis performance and cohesive strength, and constructing operation is convenient, is applicable to large-scale promotion application, has significant economic benefit and social benefit.
The present invention adopts inclusion-free silt content to be less than 2% quartz sand as aggregate, and its good aggregate collocation forms good skeleton in thin layer anti-cracking plastering mortar, can access the thin layer anti-cracking plastering mortar that workability is good closely knit.Redispersable latex powder in the present invention, is used in thin layer anti-cracking plastering mortar, to improve mortar force of cohesion and water-retentivity, guarantees that mortar obtains good cohesive strength.
Water-holding agent in the present invention, is used for carrying out water-keeping thickening in thin layer anti-cracking plastering mortar, improves the wet viscosity of construction simplicity and binding agent etc.Vltra tears preferably, as the water-holding agent of this sand-cement slurry, has pumping.In the slurry of plastering, as tamanori, improve smear and extend operable time.The water retention property of Vltra tears makes slurry can, because of so dry that to chap too soon, not strengthen the rear intensity of sclerosis after smearing.
Normal silicate 42.5 cement that adopt in the present invention are a kind of inorganic binders, are used for making the intensity of mortar to develop and guarantee the time of coagulation of mortar and good later strength rapidly.Staple fibre in the present invention, for effectively improving the cracking resistance of mortar, the ability such as freeze proof, impervious.Xylon in the present invention, can improve mortar workability, splitting resistance, the anti-property of hanging down, improve bonding strength and surface strength.Dicalcium powder in the present invention, not only can reduce cement consumption and reduce production costs, and can also increase toughness and the intensity of mortar.
The present invention is by the allotment of quartz sand fineness and the appropriate proportioning of consolidating material and add the water-holding agent of optimum quantity, make the plastering mortar coefficient of expansion of the present invention adapt to the coefficient of expansion of air-entrained concrete building block, self water retention capacity adapts to that air-entrained concrete building block self water-intake rate is large, the feature of vesicular structure just, makes the special-purpose thin layer anti-cracking plastering of steam-pressing aero-concrete of the present invention mortar.
Compared with prior art, the beneficial effect that the special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete of the present invention mortar has is: this thin layer anti-cracking plastering mortar resistance to cleavage is excellent, the shrinking percentage of mortar has obtained effectively controlling, large-area construction there will not be cracking, effectively prevents coat of plaster cracking; Adhesive property is good, mortar and the organic combination of steam-pressing aero-concrete surface layer, water-retentivity is high, density good, cohesive strength is large, and constructing operation is convenient, the significant advantages such as this product has energy-saving and environmental protection, intensity is high, construction comprehensive cost is low, good product quality.
Embodiment
Below in conjunction with specific embodiment, the special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete of the present invention mortar is done to progress and do not illustrate, wherein embodiment 1 is most preferred embodiment.
The present invention utilizes the thin layer anti-cracking plastering mortar that quartz sand and suitable consolidating material are the special use of main raw material(s) making steam-pressing aero-concrete.Preparation method of the present invention is: by the metering of recipe ratio row, take various starting material, in stirrer, add successively quartz sand, ordinary Portland cement (grade of compressive strength was 42.5 in 28 days), dicalcium powder, redispersable latex powder, water-holding agent preferentially to adopt Vltra tears, xylon, staple fibre to adopt 0.6mm staple fibre to stir, form thin layer anti-cracking plastering mortar product, during construction, according to the ratio of water cement ratio 1:4, mix, after stirring 3 ~ 5min, use.
The mass percent consumption that table 1 is embodiment 1 ~ 6 siccative and corresponding detected result of wiping one's face after over dry.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Normal silicate 42.5 cement | 30% | 32% | 32% | 26% | 20% | 35% |
| 40 ~ 70 object quartz sands | 20% | 22% | 28% | 30% | 29% | 10% |
| 80 ~ 100 object quartz sands | 41% | 38% | 30% | 37.45% | 39.04% | 50% |
| 200 order dicalcium powders | 5% | 4% | 6% | 3% | 7% | 2% |
| Redispersable latex powder | 2.9% | 3% | 2.8% | 2.6% | 4% | 1.85% |
| Water-holding agent | 0.3% | 0.4% | 0.35% | 0.25% | 0.15% | 0.5% |
| Xylon | 0.5% | 0.4% | 0.6% | 0.3% | 0.7% | 0.2% |
| Staple fibre | 0.3% | 0.2% | 0.25% | 0.4% | 0.11% | 0.45% |
| Delamination degree (mm) | 18 | 18 | 18 | 18 | 16 | 17 |
| Ultimate compression strength (MPa) | 5.3 | 5.4 | 5.2 | 5.3 | 5.1 | 5.5 |
| Cohesive strength (MPa) | 0.35 | 0.36 | 0.35 | 0.37 | 0.35 | 0.4 |
Wherein embodiment 1 ~ 4 water-holding agent used is Vltra tears, and embodiment 5,6 water-holding agents are polyacrylamide.
The special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete of the present invention mortar as can be seen from Table 1, after wiping one's face, performance is: delamination degree: 16 ~ 18mm, ultimate compression strength: 5.1 ~ 5.5MPa, cohesive strength 0.35 ~ 0.4MPa, meet the requirement of JC890-2001 industry standard, property indices detected result of the present invention and experiment are used and are shown that this product meets the properties requirement of industry standard to special plastering mortar, with excellent water-retentivity and splitting resistance, mortar is abundant aquation in use, bond more firm, pore is more closely knit, make mortar there is good cohesive force and the anti-property of hanging down, the phenomenon of stopping metope hollowing cracking occurs.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (3)
1. the special-purpose thin layer anti-cracking plastering of a steam-pressing aero-concrete mortar, is characterized in that: according to quality, than water: siccative=1:4, add water to stir 3 ~ 5min mortar processed; Described siccative mass percent is: cement 20 ~ 35%, 40 ~ 70 order quartz sand 10 ~ 30%, 80 ~ 100 order quartz sands 30 ~ 50%, 200 order dicalcium powders 2 ~ 7%, redispersable latex powder 1.5 ~ 4%, water-holding agent 0.15 ~ 0.5%, xylon 0.2 ~ 0.7%, staple fibre 0.11 ~ 0.45%;
Described water-holding agent is Vltra tears;
Described staple fibre mean length is 0.6mm.
2. the special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete according to claim 1 mortar, is characterized in that: described cement is normal silicate 42.5 cement.
3. the special-purpose thin layer anti-cracking plastering of a kind of steam-pressing aero-concrete according to claim 1 mortar, is characterized in that: described quartz sand silt content is less than 2%.
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| CN201310030503.9A CN103058614B (en) | 2013-01-25 | 2013-01-25 | Special thin anti-crack plastering mortar for autoclaved aerated concrete |
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| CN201310030503.9A CN103058614B (en) | 2013-01-25 | 2013-01-25 | Special thin anti-crack plastering mortar for autoclaved aerated concrete |
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| CN103058614B true CN103058614B (en) | 2014-10-08 |
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| CN104211338A (en) * | 2014-08-28 | 2014-12-17 | 成都市容德建筑劳务有限公司 | Crack-resisting composite mortar |
| CN105271961A (en) * | 2015-05-19 | 2016-01-27 | 连云港松彬建筑材料有限公司 | Coating mortar |
| CN105601209A (en) * | 2016-04-10 | 2016-05-25 | 欧振云 | Crack-resistant plastering mortar |
| CN105906263A (en) * | 2016-04-19 | 2016-08-31 | 金华市奥菲建材有限公司 | Autoclaved aerated concrete masonry environment-friendly mortar and preparation method of same |
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| CN107021707A (en) * | 2017-05-31 | 2017-08-08 | 福州市思科达建设科技有限公司 | A kind of cracking resistance granite stone powder thin layer motar |
| CN107151124A (en) * | 2017-06-01 | 2017-09-12 | 云南坤瑞泰隆建材科技股份有限公司 | A kind of steam-pressing aero-concrete thin layer decorative mortar |
| CN107117884B (en) * | 2017-06-19 | 2019-11-15 | 清远肆柒柒新材料科技有限公司 | A kind of microdilatancy Fireproof thermal insulation mortar and preparation method thereof |
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| CN111519775A (en) * | 2020-04-29 | 2020-08-11 | 河南远大可持续建筑科技有限公司 | Anti-cracking treatment method for joints of autoclaved aerated concrete wallboards |
| CN113307584A (en) * | 2021-07-01 | 2021-08-27 | 东莞市建安集团有限公司 | Thin-layer mortar and masonry construction method thereof |
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