Behavior of Silicate Bricks During Prolonged Contact with the Ground

Data on the effect of long-term storage of silicate bricks in various conditions: in the air and on the ground, on its strength and phase composition are presented. It has been established that over seven years of storage, there is no decrease in the compressive strength of the brick, regardless of its initial strength. Analysis of the phase composition of the silicate brick showed that portlandite, calcite and tobermorite are present in all samples in addition to quartz. Quantitative analysis of the curves of differential thermal analysis indicates that when storing bricks on the ground, the processes of carbonation of free lime and calcium hydrosilicates in the stone occur much faster, which is probably due to its higher humidity and more favorable conditions for the penetration of carbon dioxide into the depth of the structure. It is likely that a longer period of time is needed to identify the influence of storage conditions and the initial strength of silicate bricks on their durability, which will be a continuation of this study.