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Materials 2015, 8(2), 638-651; doi:10.3390/ma8020638

Properties of Chemically Combusted Calcium Carbide Residue and Its Influence on Cement Properties

Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China
Department of Civil Engineering, COMSATS Institute of Information Technology, Abbottabad 22010, Pakistan
Authors to whom correspondence should be addressed.
Academic Editor: Duncan Gregory
Received: 23 November 2014 / Accepted: 5 February 2015 / Published: 13 February 2015
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Calcium carbide residue (CCR) is a waste by-product from acetylene gas production. The main component of CCR is Ca(OH)2, which can react with siliceous materials through pozzolanic reactions, resulting in a product similar to those obtained from the cement hydration process. Thus, it is possible to use CCR as a substitute for Portland cement in concrete. In this research, we synthesized CCR and silica fume through a chemical combustion technique to produce a new reactive cementitious powder (RCP). The properties of paste and mortar in fresh and hardened states (setting time, shrinkage, and compressive strength) with 5% cement replacement by RCP were evaluated. The hydration of RCP and OPC (Ordinary Portland Cement) pastes was also examined through SEM (scanning electron microscope). Test results showed that in comparison to control OPC mix, the hydration products for the RCP mix took longer to formulate. The initial and final setting times were prolonged, while the drying shrinkage was significantly reduced. The compressive strength at the age of 45 days for RCP mortar mix was found to be higher than that of OPC mortar and OPC mortar with silica fume mix by 10% and 8%, respectively. Therefore, the synthesized RCP was proved to be a sustainable active cementitious powder for the strength enhanced of building materials, which will result in the diversion of significant quantities of this by-product from landfills. View Full-Text
Keywords: calcium carbide residue; by-product; reactive cementitious powder; chemical combustion calcium carbide residue; by-product; reactive cementitious powder; chemical combustion

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sun, H.; Li, Z.; Bai, J.; Memon, S.A.; Dong, B.; Fang, Y.; Xu, W.; Xing, F. Properties of Chemically Combusted Calcium Carbide Residue and Its Influence on Cement Properties. Materials 2015, 8, 638-651.

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