ACCOUNTING FOR THE INFLUENCE OF HUMIDITY PROPERTIES OF AUTOCLAVE- CURED CELLULAR CONCRETE IN THE DESIGN AND CONSTRUCTION OF ENCLOSING STRUCTURES

Bulletin of Science and Research Center “Stroitelstvo” Pub Date : 2021-08-31 DOI:10.37538/2224-9494-2021-3(30)-88-99

V. Strotskiy, A. Krokhin, V. Savin

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Abstract

The results of studies of porosity, water absorption, moisture shrinkage and frost resistance of cellular concrete, which are some of the main factors determining the durability of cellular concrete enclosing structures manufactured using autoclave hardening technology, are considered. Methods for determining water absorption, moisture shrinkage and frost resistance are presented. The relationship between the moisture shrinkage and the capillary forces (the sum of the surface tension forces on the micromeniscs of liquid in the capillaries of cellular concrete), as well as the dependence of the shrinkage on the size (radius) of the capillary and gas pores of cellular concreteand on the water-solid ratio (W/S-factor) of cellular concrete, is established. In the field of frost resistance of cellular concrete, the relationship between the structure of the pore space of concrete and its deformation characteristics under the action of negative temperatures is studied. The effect of the presence of gas pores in cellular concrete on the reduction of frost expansion deformations is described.

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在围护结构设计和施工中考虑蒸压养护泡沫混凝土湿度特性的影响

考虑了多孔混凝土的孔隙率、吸水率、收缩率和抗冻性的研究结果，这些是决定采用蒸压硬化技术制造的多孔混凝土围护结构耐久性的一些主要因素。介绍了吸水率、收缩率和抗冻性的测定方法。建立了水收缩与毛细力(毛细孔中液体的表面张力之和)之间的关系，以及收缩与毛细孔和气孔的大小(半径)和水固比(W/ s因子)的关系。在泡沫混凝土抗冻领域，研究了负温度作用下混凝土孔隙空间结构与其变形特性的关系。叙述了多孔混凝土中气孔的存在对减少冻胀变形的影响。

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Bulletin of Science and Research Center “Stroitelstvo”

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