Hardening of carbonate filled concretes in different conditions

Abstract

At Tashkent chemical-technological institute, a study is being conducted to obtain strong concrete based on carbonate aggregates. These studies were conducted on flexible concrete mixes and aggregates up to 40mm in size, so the strength of the concrete did not exceed 40 kG/cm2 as a rule. Experiments show that in non-high-grade concrete, the strength of the limestone aggregates has a relatively small effect on the strength of the concrete. For example, the difference in the strength of concretes made of Baishevsk limestone and granite gravel does not exceed 5%, while the strength of the filler rocks differs by 10 times. Their results show that fillers made from ordinary limestone and carbonate wastes of the soda plant, despite the low strength of the rocks (average from 15 to 100 kG/cm), based on their structure, texture and chemical-mineralogical composition, at normal cement consumption, 150–300 kG/cm and has been shown to provide a higher strength concrete yield.