SHRINKAGE STRAIN AT THE FORMATION OF THE STRUCTURE OF CELLULAR CONCRETE
Structure formation of cellular concrete in a limited volume leads to the creation of the pressure gradient and the concentration and redistribution of moisture in the mineral matrix and also to increase its density. With well-chosen mixture compositions and modes of formation it can lead to low-shrinkage of autoclaved aerated concrete. The authors study shrinkage of traditional cellular concrete and optimal compositions and its changes over time. It is shown that the greatest shrinkage occur in the early stages of structure formation and hardening of aerated concrete. The optimization is implemented and the technique of selection of non-autoclaved aerated concrete is developed.