CN102344273A - Preparation method of anti-shrinkage autoclaved aerated concrete block dry powder masonry mortar - Google Patents

Preparation method of anti-shrinkage autoclaved aerated concrete block dry powder masonry mortar Download PDF

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Publication number
CN102344273A
CN102344273A CN201010244416XA CN201010244416A CN102344273A CN 102344273 A CN102344273 A CN 102344273A CN 201010244416X A CN201010244416X A CN 201010244416XA CN 201010244416 A CN201010244416 A CN 201010244416A CN 102344273 A CN102344273 A CN 102344273A
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China
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dry
aerated concrete
cellulose
powder
shrinkage
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CN201010244416XA
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汤建新
贺江波
胡舜钦
许利剑
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汤建新
贺江波
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Priority to CN201010244416XA priority Critical patent/CN102344273A/en
Publication of CN102344273A publication Critical patent/CN102344273A/en
Pending legal-status Critical Current

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Abstract

The invention provides a preparation method of novel anti-shrinkage dry powder masonry mortar special for autoclaved aerated concrete blocks, and the components and ratios are: 15%-20% of anhydrite, 25%-35% of portland cement, 5%-16% of lime powder, 33%-54% of dry sand (20-40 meshes), 0.6%-0.8% of redispersable latex powder, 0.3%-0.5% of cellulose ether, and 0.4%-0.6% of calcium formate. The dry shrinkage value of the dry powder mortar is adjusted by adding cement and gypsum, and thus is close to a dry shrinkage value of an autoclaved aerated concrete block; the dry shrinkage value of a material for bonding the mortar is close to the dry shrinkage value of the autoclaved aerated concrete block; the synchronization of the shrinkage and the expansion overcomes quality accidents of empty drum, sun crack, and even shedding of masonry and floated coats caused by excessively rapid water loss of walls; and the invention has good value for popularization and application.

Description

A kind of preparation method of anti-contraction autoclave aerated concrete building block dry-mixed masonry mortar
One, technical field
The invention belongs to building material technical field, particularly a kind of preparation method of special-purpose dry-mix.
Two, background technology
Autoclave aerated concrete building block (hereinafter to be referred as aerated-block) China apply existing 30 surplus year; For a kind of so novel lightweight; Heat-insulating property is materials for wall preferably; Should be widelyd popularize; But for a long time; The aerated-block masonry is still built by laying bricks or stones with traditional brick-building art; And with traditional masonry mortar and the supporting use of facing way; Make body of wall produce persistent ailments such as " splitting; ooze; leak "; It mainly is because easy contraction of autoclave aerated concrete building block body of wall caused; Have a strong impact on the use of building and attractive in appearance, thereby influenced applying of aerated-block greatly.And the blockwork contraction is because the contraction of building block itself and masonry mortar contraction cause.Because of raining or moist zone, the concrete small block that drying shrinkage has tended towards stability is soaked once more, causes that body of wall inside produces certain stress.1.6~7.2 times of the brick heights of the modular ratio of little building block; The drying shrinkage value of building block is bigger 2~6 times than brick structures again; So the string stress of masonry is more much bigger than brick wall; When the tension of body of wall and slip resistance are not enough to resist string stress; Body of wall will strain cracking; Coat of plaster hollowing cracking even the phenomenon that comes off happen occasionally, and have a strong impact on the quality of the popularization and the construction work of novel wall material.
Three, summary of the invention
Technical problem: the present invention is directed to above-mentioned technological deficiency; Provide a kind of novel anti to shrink the special-purpose dry-mix of autoclave aerated concrete building block; Thereby reduce cost; Make the material and the autoclave aerated concrete building block of adhesive mortar close, pucker & bloat overcomes the body of wall dehydration synchronously to be caused too soon and builds the hollowing that occurs with coat of plaster, the dry and cracked even quality accident that comes off by laying bricks or stones.
Technical scheme: technical solution of the present invention is:
The present invention includes dehydrated gyp-, silicate cement, lime powder, dry sand, can split fiber in dispersed latex powder, ether of cellulose, resistance; Its quantitative proportion be dehydrated gyp-15%~20%, silicate cement 25%~35%, lime powder 5%~16%, dry sand (20~40 order) 33%~54%, can be at dispersed latex powder 0.6%~0.8%, ether of cellulose 0.3%~0.5%, calcium formiate 0.4%~0.6%.
Said ether of cellulose is made up of ionic Mierocrystalline cellulose or non-ionic type Mierocrystalline cellulose
Said ionic Mierocrystalline cellulose comprises carboxymethyl cellulose, and the non-ionic type Mierocrystalline cellulose comprises ethyl cellulose or methylcellulose gum or Natvosol.
Its making processes is: 1) raw material is prepared; 2) raw material is joined in metering; 3) join admixture; 4) dry blend; 5) dry sand is joined in metering; 6) mix stirring; 7) metering packing seven big steps, order of connection completion successively between the individual step; In this making processes, all raw materials are the powdery siccative.
Cement can increase the water tolerance and the intensity of gypsum among the present invention, and gypsum can weaken the contraction of cement, regulates the drying shrinkage value of mortar through adding cement and gypsum, makes it approach the drying shrinkage value of autoclave aerated concrete building block.Lime powder can improve the workability of mortar and heat release that minimizing thes cement solidifies is shunk; Add water-retaining admixture and can disperse rubber powder can improve with building block and cohesive strength; Add resistance and split fiber section minimizing crackle about 75%, can improve the flexibility of mortar, the generation that solves tiny crack.
Key of the present invention is that gypsum and cement add simultaneously, plays the complementary action of material, improves the early strength of mortar and the drying shrinkage value of regulating mortar; Adding multiple admixture is the weakness that will comprehensively change inorganic coagulation material, overcomes because of the body of wall suction is too fast becoming coat of plaster hollowing cracking phenomena with shrinking.Use the present invention can improve the cohesive force and the water-retentivity of mortar and masonry; Make the material of motar close with the autoclave aerated concrete building block material; Contraction is synchronous with expansion, and the generation that solves crackle, hollowing, obscission can prevent accidents resulting from poor quality of projects such as body of wall seepage.
Four, embodiment
Describe in the face of embodiments of the invention 1 down:
Embodiments of the invention 1 comprise gypsum, silicate cement, lime powder, dry sand, can be at dispersed latex powder, ether of cellulose, calcium formiate; Its quantitative proportion be dehydrated gyp-18%, silicate cement 30%, lime powder 5.5%, dry sand (20~40 order) 45%, can be at dispersed latex powder 0.6%, ether of cellulose 0.4%, calcium formiate 0.5%.
Its making processes is 1) the raw material preparation: be ready to anhydrous plaster powder, lime powder, cement, dry sand and powdery siccative; 2) raw material is joined in metering: the quantity that is ready to anhydrous plaster powder, lime powder, cement by ratio requirement respectively; 3) join admixture: the quantity that is ready to ether of cellulose, calcium formiate by ratio requirement respectively; 4) dry blend: anhydrous plaster powder, lime powder, cement, ether of cellulose, calcium formiate are sent the cantilevered mixer to; 5) dry sand is joined in metering: by ratio requirement dry sand is added the cantilevered mixer; 6) mix to stir: make material thorough mixing in the cantilevered mixer, stir; 7) metering packing: by product category metering, packing, warehouse-in, an order of connection is accomplished between each step.
In embodiments of the invention making processes, anhydrous plaster powder, lime powder, the cement that measures is added the cantilevered batch mixing drop into admixture while stirring, stirred 20 minutes, adding dry sand stirring 20 minutes, go out stirrer, metering, dress bag, warehouse-in.In this process, anhydrous plaster powder, lime powder, cement, dry sand must be siccatives, and metering must be that standard is gone errorless.The finished product of made meets People's Republic of China's building material industry standard JC890-2001 steam-pressing aero-concrete with building block mortar and plastering mortar.
Embodiment 2
Embodiments of the invention 2 comprise gypsum, silicate cement, lime powder, dry sand, can be at dispersed latex powder, ether of cellulose, calcium formiate; Its quantitative proportion be dehydrated gyp-16%, silicate cement 35%, lime powder 7.5%, dry sand (20~40 order) 40%, can be at dispersed latex powder 0.6%, ether of cellulose 0.4%, calcium formiate 0.5%.
Embodiment 3
Embodiments of the invention 3 comprise gypsum, silicate cement, lime powder, dry sand, can be at dispersed latex powder, ether of cellulose, calcium formiate; Its quantitative proportion be dehydrated gyp-20%, silicate cement 30%, lime powder 13.2%, dry sand (20~40 order) 35%, can be at dispersed latex powder 0.8%, ether of cellulose 0.4%, calcium formiate 0.6%.
Embodiment 4
Embodiments of the invention 4 comprise gypsum, silicate cement, lime powder, dry sand, can be at dispersed latex powder, ether of cellulose, calcium formiate; Its quantitative proportion be dehydrated gyp-17%, silicate cement 30%, lime powder 11.5%, dry sand (20~40 order) 40%, can be at dispersed latex powder 0.6%, ether of cellulose 0.4%, calcium formiate 0.5%.

Claims (4)

1. a novel anti is shunk the preparation method of the special-purpose dry-mix of autoclave aerated concrete building block, it is characterized in that its proportioning: dehydrated gyp-15%~20%, silicate cement 25%~35%, lime powder 5%~16%, dry sand (20~40 order) 33%~54%, can be at dispersed latex powder 0.6%~0.8%, ether of cellulose 0.3%~0.5%, calcium formiate 0.4%~0.6%.
2. the preparation method of the special-purpose dry-mix of anti-contraction autoclave aerated concrete building block according to claim 1, it is characterized in that said proportioning be dehydrated gyp-18%, silicate cement 30%, lime powder 5.5%, dry sand (20~40 order) 45%, can be at dispersed latex powder 0.6%, ether of cellulose 0.4%, calcium formiate 0.5%.
3. the preparation method of the special-purpose dry-mix of anti-contraction autoclave aerated concrete building block according to claim 1 is characterized in that said silicate cement is 32.5 grades of ordinary Portland cements.
4. the preparation method of the special-purpose dry-mix of anti-contraction autoclave aerated concrete building block according to claim 1; It is characterized in that said ether of cellulose is made up of ionic Mierocrystalline cellulose or non-ionic type Mierocrystalline cellulose; The ionic Mierocrystalline cellulose comprises carboxymethyl cellulose, and the non-ionic type Mierocrystalline cellulose comprises ethyl cellulose or methylcellulose gum or Natvosol.
CN201010244416XA 2010-08-04 2010-08-04 Preparation method of anti-shrinkage autoclaved aerated concrete block dry powder masonry mortar Pending CN102344273A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104163610A (en) * 2014-08-13 2014-11-26 福州大学 B07 grade autoclaved sand aerated concrete block prepared by adding saponin air entraining agents
CN104230294A (en) * 2014-09-13 2014-12-24 长沙海弘建材有限公司 Gypsum-based masonry mortar and preparation method thereof
CN104386980A (en) * 2014-10-24 2015-03-04 河南兴安新型建筑材料有限公司 Masonry mortar for autoclaved aerated concrete
CN104591648A (en) * 2014-12-31 2015-05-06 安徽中龙建材科技有限公司 Quick-drying aerated concrete block adhesive and preparation method and application of quick-drying aerated concrete block adhesive
CN105837120A (en) * 2016-04-14 2016-08-10 广西横县恒丰建材有限责任公司 Aerated concrete block masonry mortar and production method thereof
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
CN108117359A (en) * 2017-12-29 2018-06-05 河南兴安新型建筑材料有限公司 Self-heat conserving autoclave aerated concrete building block mending mortar and preparation method thereof
CN110330298A (en) * 2019-07-04 2019-10-15 长沙归一建材科技有限公司 Cement base fire coal clinker light mortar
CN112064880A (en) * 2020-08-21 2020-12-11 闫山 Masonry-free self-bonding concrete block and using method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104163610A (en) * 2014-08-13 2014-11-26 福州大学 B07 grade autoclaved sand aerated concrete block prepared by adding saponin air entraining agents
CN104163610B (en) * 2014-08-13 2016-02-24 福州大学 A kind of B07 level steam pressure sand aerated concrete block adding saponins air entrapment agent and prepare
CN104230294A (en) * 2014-09-13 2014-12-24 长沙海弘建材有限公司 Gypsum-based masonry mortar and preparation method thereof
CN104386980A (en) * 2014-10-24 2015-03-04 河南兴安新型建筑材料有限公司 Masonry mortar for autoclaved aerated concrete
CN104591648A (en) * 2014-12-31 2015-05-06 安徽中龙建材科技有限公司 Quick-drying aerated concrete block adhesive and preparation method and application of quick-drying aerated concrete block adhesive
CN105837120A (en) * 2016-04-14 2016-08-10 广西横县恒丰建材有限责任公司 Aerated concrete block masonry mortar and production method thereof
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
CN108117359A (en) * 2017-12-29 2018-06-05 河南兴安新型建筑材料有限公司 Self-heat conserving autoclave aerated concrete building block mending mortar and preparation method thereof
CN110330298A (en) * 2019-07-04 2019-10-15 长沙归一建材科技有限公司 Cement base fire coal clinker light mortar
CN112064880A (en) * 2020-08-21 2020-12-11 闫山 Masonry-free self-bonding concrete block and using method thereof

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