Effect of Elevated Temperatures on Properties of Blended Cements with Clinoptilolite

Ahmet BEYCİOGLU, Hüseyin Yılmaz ARUNTAŞ, Osman GENCEL, Haley E. HAGG LOBLAND, Ayhan ŞAMANDAR, Witold BROSTOW

Abstract


We have investigated the effect of elevated temperature on properties of clinoptilolite blended cements. Clinoptilolite was used at 5 %, 10 %, 15 % and 20 % replacement by weight for Portland cement while sand and water quantities were kept constant in all mix designs. Dry weights, flexural strengths, and compressive strengths of specimens were determined as a function of time. The same properties were again evaluated after specimens, having reached the age of 90 days, were exposed to 300 °C, 400 °C and 500 °C temperatures for 3 h. Initial setting times for all cements prepared were ≥ 60 minutes, the limiting time according to TS EN 197-1. The mortars with 5 % or 10 % cliniptilolite substitution have compressive strength exceeding 42.5 MPa after being subjected to 400 °C and 500 °C.

DOI: http://dx.doi.org/10.5755/j01.ms.22.4.13354


Keywords


blended cement, clinoptilolite, cement compressive strength, elevated temperatures

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Print ISSN: 1392–1320
Online ISSN: 2029–7289