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The Effect of Adding Zeolite and Silica Fume on Properties of Hardened Ordinary and High Strength Concretes with Cement Grades 32.5, 42.5, and 52.5 by Mohammad Kazem Sharbatdar; Hadi Roudy; Mohammad Najim Wahedy is a Earth and Planetary Sciences article available to read on EtoBox.

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In this paper, the effects of replacing natural zeolite and industrial by-products of silica fume with a portion of cement on ordinary and high-strength concretes with a compressive strength of 35 and 50 MPa were investigated. Twenty-four concrete mix designs, with three different grades of cement with compressive strengths of 32.5, 42.5, and 52.5 MPa, were considered. The percentage of zeolite replacement was 10, 20, and 30%, and silica fume was 7.5% by weight of cement. The compressive and tensile strength tests were performed at the ages of 28, 56, and 90 days, and as well as the XRD, DTA, TGA, and DTG tests were performed. The test results indicated that although the compressive strength of concrete containing zeolite in 28 days was less than that of normal concrete, the 56 and 90-day strengths of concretes containing up to 20% zeolite were almost equal to or even more than that of ordinary concrete, and the desired strengths were achieved. Also, the addition of 7.5% silica fume had a positive effect on compressive strength, and even in combination with 30% zeolite, it had compensated for the decrease in strength. The addition of up to 20% zeolite for ordinary concrete increase

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Author

Mohammad Kazem Sharbatdar; Hadi Roudy; Mohammad Najim Wahedy

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)