Analysis of the development of autogenous shrinkage of CEM I 42.5R and CEM III/A 42.5N cement pastes with different water to cement ratios

In concrete technology, cements with a high content of Portland clinker are increasingly being replaced by blended binders lower carbon footprint. Such include blastfurnace cements, which successfully used in concretes designed for large-scale elements, self-compacting concretes, as well the precast industry. Blast furnace exhibit strength gain relative to and heat hydration. Composites that incorporate them significantly more resistant occurrence thermal stresses at early stages curing concrete. This paper provides comparative study development autogenous shrinkage cement pastes made from CEM I 42.5R III/A 42.5N variable w/c ratio using dilatometric method on proprietary instrument covered patent PL241667. Furthermore, tests consistency, setting times compressive were performed after 2, 7 28 days curing. From analyses carried out, it was found containing blast show greater over period compared cement. The pozzolanic reaction granulated slag contributes increase recorded shrinkage. An water-cement has an impact decreased gain, value research results indicate need take into account when designing high-performance due increased susceptibility microcracks durability material.