Evaluation of the Shrinkage Produced with the Use of Cements with Pozzolanic Additions in the Production of Concrete

Early age cracking in concrete is caused by a combination of the chemical and autogenous shrinkage exhaustion water pores during hydration cement phases. Generally, this process takes place first 72 h casting. The use supplementary cementitious materials (SCMs) can mitigate due to several factors, among them: dilution effect, provision extra nucleation sites high specific surface SCMs, increased retention associated with presence fine SCMs. This paper compares impact two SCMs systems on early following concretes: (i) pozzolanic natural pozzolan (zeolite) (ii) ternary binder limestone-calcined clay (LC3). study was Carried out paste concrete. addition calcined limestone decreases better than any other system, including Portland-pozzolan system. It related lower clinker factor improved better-developed microstructure at ages energetic reaction alumina phase C3A, enhanced (Al2O3) provided clay.