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Title: Durability of the Concrete based on a Sulphate-Aluminate Cement

Author(s): Panchenko, Alexander I.; Bazhenov, Yuri M.; and Kharchenko, Igor Ya

Publication: Symposium Paper

Volume: 326


Appears on pages(s): 33.1-33.10

Keywords: chemical contraction, durability, expanding sulphate-aluminate additive, inherent strains, micro cracks

DOI: 10.14359/51711015

Date: 8/10/2018


The results of the studies given in the article show that chemical shrinkage (contraction) in the medium-weight concrete (cement consumption of about 350 kg/m3 (589.9 lb/yd 3)) leads to a decrease in the volume of the mortar part by an average of 1.6%. Such shrinkage strains are the cause of tensile stresses that exceed the tensile strength of the cement stone and the strength of adhesion of the cement stone to the aggregate. This causes micro cracks in cement stone and in the area of its contact with the aggregate, which increases structural defectiveness and reduces the concrete durability. The use of expanding additives of the sulfoaluminous type in an amount of 6-8% of the cement mass significantly reduces structural defectiveness and increases the concrete durability: frost resistance, waterproofness, resistance to heating-cooling and moistening-drying processes.