supplementary cementitious materials

PROPERTIES OF FRESH AND HARDENED SELF-COMPACTING CONCRETE CONTAINING SUPPLEMENTARY CEMENTITIOUS MATERIALS

This paper presents the properties of fresh and hardened self-compacting concrete (SCC) containing supplementary cementitious materials, such as complex sulphoaluminosilicate additive based on the metakaolin and gypsum, fly-ash and limestone microfiller. If sufficient gypsum is present the main hydration products in unclinker part is a thin crystals of ettringite. Ettringite is formed by a topochemical reaction in a closed space at the beginning of the formation of the cement matrix, which ensures the compaction of SCC.

RESEARCH ON THE STRUCTURE FORMATION PROCESSES IN THE SYSTEM «BLAST FURNANCE SLAG - WASTEPAPER SLUDGE ASH»

Concrete production is one of the largest consumers of natural non-metallic materials. To mitigate the environmental impact associated with cement production The use of wastepaper sludge ash (WSA) from paper recycling is a new promising direction for saving fuel, energy, and natural resources in cement and concrete production, aimed at reducing the proportion of clinker in cement by replacing part of the cement with supplementary cementitious materials.