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

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.