JUN, L.; CHANGWEI, X.; RUNQING, L.; HONG, Q.
Shenyang Jianzhu University, School of Material Science and Engineering
This paper introduces a method of saving materials and energy through making small hollow blocks by including a slag admixture in the lightweight aggregate concrete. Using parametric studies on design, this paper took slag content, water binder ratio and admixture dosage into consideration and focused on the influence of slag content on the physical and mechanical properties of lightweight aggregate concrete small hollow blocks. The results show that: when water binder ratio admixture dosage and curing system are kept fixed, as the range of slag content charges from 30%-40%, with the increase in slag content, the compressive and bending strength of small hollow blocks increased first and then decreased; water content and absorption and relative moisture content decreased first and then increased; frost resistance increased then decreased; softening coefficient first increased and then decreased. When the slag content is 35%, the physical and mechanical properties of lightweight aggregate concrete small hollow block are the best, and all the indexes of physical and mechanical properties meet the standard requirements for non-bearing lightweight aggregate concrete hollow block.
slag, content, lightweight aggregate concrete, small hollow block, physical property, mechanical property