The effect of using granite waste and combined granite-ceramic porcelain waste on the properties of reactive powder concrete (RPC)

Document Type : Research Article

Authors

Department of Mechanical, Civil and Architectural Engineering, Kho.C., Branch, Islamic Azad University, Iran

Abstract

In the manufacture of reactive powder concrete (RPC), a large amount of silica sand is consumed. To reduce the dependence of RPC concrete on silica sand, using waste is a very suitable and low-cost option. In this research, the effect of replacing granite waste powder (GWP) as well as placing porcelain ceramic waste (PCW) and granite waste powder as a combination instead of silica sand in making RPC concrete was investigated with 9 mixing designs. Microsilica was used with 12.5% and 25% of cement weight. In all designs, the ratio of water to cement materials (W/CM) was considered equal to 20% and super-lubricant (SP) equal to 2% of cement weight. The consumption of granite waste was replaced by 50 and 75% of the weight of silica sand, and in combined designs, 50% of the weight of granite waste was replaced with porcelain ceramic waste. The samples were baked with water vapor at 95°C for 3, 7, 14 and 28 days to test the compressive and bending strength. The design that contained cementitious materials with 25% microsilica and sand materials consisting of 50% silica sand and 50% combined waste obtained the highest compressive strength at all ages. The lowest compressive strength, which was even lower than the control design, was seen in the design containing 12.5% microsilica and 75% granite without porcelain ceramic waste. In the bending strength test, the highest strength was observed in the design that contained 75% combined waste and 25% microsilica.

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Amirkabir Journal of Civil Engineering
Volume 57, Issue 9
December 2025
Pages 1571-1596

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