EFFECT OF IRANIAN NATURAL POZZOLANS ON DURABILITY OF SELFCOMPACTEDCONCRETE EXPOSE TO HIGH TEMPRATURES(STYDY ON GREEN TUFF OF ABYEK)

In the present article, first the mix design of self-compacted concrete is being optimized forthe compression resistance through adopting Taguchi method. In this process, first adopting commonmethods of mix design of self-compacted concrete resulted in three mix designs and their ۷-day compressionresistance and through using these mix design and Taguchi method, the optimized mix design was prepared.In the next phase, the impact of Green Tuff of Abyek pozzolan which is a kind of natural pozzolan in Iranwas investigated on the durability of the self-compacted concrete expose to high temperature. So the samplesincluding ۰, ۱۰, ۲۰, ۳۰ and ۴۰ percent pozzolan and their behavior in high temperature were discussed. Theexperiments carried out on the new concrete in the present research involved slump flow, J-ring, L-box, Vfunnel,U-box, compression resistance experiment and porosity percentage. The results of the study revealedthat the more the percentage of the present pozzolan in the concrete, the less the fall of the compressionresistance and the reduction of porosity percentage expose to high temperature. The concrete samples in theages of ۷, ۲۸ and ۹۰ days were experimented

کلیدواژه ها:

Self-compacted Concrete ، optimization of mix design ، Taguchi method ، Compressionresistance ، High temprature