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The Research of Aerated Concrete Block Dedicated Mortar

Author: ZuoDi
Tutor: XiaoLiGuang
School: Jilin Architectural and Civil Engineering
Course: Materials Science
Keywords: Aerated concrete block Energy-saving insulation For supporting mortar Mechanism of action Performance
CLC: TU578.1
Type: Master's thesis
Year: 2010
Downloads: 172
Quote: 0
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Abstract


As to promote the implementation of energy conservation policies in the field of building and wall reform vigorously aerated concrete block as a new type of wall materials for its series of advantages, more and more favored by the market, is widely for construction works. However, due to the large aerated concrete block water absorption, porous structure characteristics, when used in combination with ordinary mortar, easy to make wall cracks, plaster layer of a large area of ??cracking, hollowing and shedding phenomenon, affecting the quality of the project and the building wall aesthetic effect. The ordinary mortar (thermal conductivity 0.8 ~ 1.0 W / (m · K)) with lightweight insulation block (thermal conductivity of 0.15 W to 0.35 W / (m · K)) between the thermal conductivity of a big gap, easy to make the entire Masonry \In this study, in the same time to solve the problems of ordinary mortar and aerated concrete between cracks mainly to solve the problem of excessive thermal conductivity difference between the two, to improve the insulation performance of aerated concrete supporting mortar. Special insulation of aerated concrete block masonry mortar and insulation surface mortar perlite the ultrafine pottery sand were used as aggregate and EPS, while adding the polymer latex powder, hydroxyethyl cellulose ether and polypropylene fiber to improve its performance. This thesis explores the impact of the influencing factors ash on the performance of dedicated supporting mortar, the sweep surface electron microscopy of dedicated mortar specimens, microstructure analysis and mechanism analysis. The results showed that: special insulation masonry mortar, cement and perlite the ultrafine ceramic sand ratio 1:1.5 (mass ratio), the best performance; dedicated insulation masonry mortar along with the increase in thermal conductivity of EPS aggregate quantity coefficient decreases, the the strength downward trend is also very obvious, the paper insulation surface mortar the EPS particles of ash 10% of the (total cement quality); redispersible latex powder modified mortar raised 7 days after the first wet, repeating the mistake of raising 21 days of curing conditions, the strength of the mortar for supporting value when the dosage of 2%, the optimal performance for supporting mortar; mixing polypropylene fibers, can significantly improve the crack resistance performance for supporting mortar performance, enhanced resistance to cracking. But when the polypropylene fiber content of more than 0.2% polypropylene fiber is easy to form the fiber group, supporting the mortar compressive strength and flexural strength will decline; incorporation hydroxyethyl cellulose ether can significantly improve the water retention properties of the mortar. Impact test, by single factor and orthogonal experimental design to determine the influencing factors of the best content and special mortar optimal mixture ratio, and its comprehensive performance test and performance meet the specification standards. Cement with perlite ultrafine ceramic sand ratio of 1:1.5 (mass ratio), special insulation masonry compressive strength of the mortar 11.12MPa, the thermal conductivity is 0.133 W / (m · K), qualified frost resistance; dedicated thermal insulation surface mortar in EPS particle content is 10% (accounting for the quality of the cement), the compressive strength of 1.07MPa, the thermal conductivity of 0.0548 W / (m · K), frost resistance qualified. Effective solution to the northern region, quite different thermal conductivity, aerated concrete blocks with ordinary mortar wall to produce \Studied in this thesis, aerated concrete supporting mortar supporting the use of aerated concrete block wall (wall thickness 490mm) reach 65% of the northern region building energy efficiency requirements can.

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CLC: > Industrial Technology > Building Science > Building Materials > Waterproof,moisture-proof material,caulking,sealing materials > Caulking , sealing materials > Mortar
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