Radiation‐resistant cements based on aluminates and chromites of alkaline earth elements

Abstract

The aim of the research is to develop and produce cements based on compositions of aluminates and chromites of alkaline earth elements which include hydraulically active phases with high strength characteristics and a high mass absorption coefficient of ionizing radiation for the creation of protective concretes. It was established that the obtained cements are high‐strength (compressive strength at the age of 28 days – 28‐79 MPa, bending strength – 5.0‐6.5 MPa); fast‐setting –the beginning of hardening from 10 min. to 2 h. 05 min., the end – from 30 min. to 3 h. 10 min.; fast‐hardening (compressive strength at the age of 3 days of hardening – 22–51 MPa) with a water‐cement ratio of 0.18–0.23, mass absorption coefficient of γ‐radiation 220–280 cm ² /g.