Properties of modified dry masonry mixtures for effective masonry units

International Scientific Conference of Young Scientists: Advanced Materials in Construction and Engineering

材料科学;土木建筑工程;工业技术

Semenov, V.^1 ; Rozovskaya, T.^1

Moscow State University of Civil Engineering, Department of Building Materials, Moscow

129337, Russia^1

关键词: Air entraining admixtures;    High-strength characteristics;    Light weight aggregate;    Optimal composition;    Optimal mixtures;    Redispersible polymer powder;    Technological properties;    Water retention capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/71/1/012042/pdf
DOI  :  10.1088/1757-899X/71/1/012042

来源: IOP

【 摘 要 】

The paper is devoted to the problem of the development of dry light-weight mixtures with hollow ceramics microspheres (CMS) for masonry works. For the one-layer fencing structures including effective masonry units, the use of "warm" masonry mortars is necessary. The used light-weight masonry mortars do not provide the brand strength and thermal uniformity of the fencing structures because of high average density. The CMS are effective light-weight aggregate for such mortars. The influence of the dosage of CMS on the physics- and-mechanics parameters and the technological properties of the masonry mortars has been studied. The optimal mixture compositions have been obtained and their main properties have been determined. The influence of an air-entraining admixture and redispersible polymer powders on the average density and physics-and-mechanics parameters of the masonry mortars have been studied. The optimal compositions of light-weight dry masonry mixtures with CMS have been suggested. It has been established that the mortars, obtained from such mixtures, have the requisite average density, the water retention capacity more than 95 %, high homogeneity and high strength characteristics. The application of the proposed mixtures enables to reduce the construction material costs and to improve the energy efficiency of the fencing structures.