Red Cement-based Decorative Mortar Prepared with Dry Electroplating Sludge Containing Pb as Red Pigm

• 作 者: 李好新 杨晓杰 SUO Zhi XIA Yibing HE Daihua
• 机 构: Key Laboratory of Advanced Civil Engineering Materials Ministry of Education, Tongji University,Beij
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2014年02期
• 关键词: mortar hydration EPSP compressive sludge satisfactory paste colors evident flexu

Red cement-based decorative mortars were prepared with different content electroplating sludge containing Pb(EPSP), and their colors, water absorption, strengths, hydration characteristics and heavy metal leachabilities were investigated. The experimental results show that EPSP can adjust the mortar color well as the red pigments exclusively used in the decorative mortars. EPSP will result in the increase of water absorption, but the mortar produced with 5% EPSP still has the very satisfactory water absorption. The mortars with EPSP are provided with nearly the same compressive, flexural and tensile bond strengths as those of the control. EPSP has no notable influence on the paste hydration. But it can densify the mortar microstructures. It is also evident that heavy metal concentrations in leachates of the mortars with EPSP are far lower than the recommended in the GB5085.3-2007.

The experimental results show that EPSP can adjust the mortar color well as the red pigments exclusively used in the decorative mortars. EPSP will result in the increase of water absorption, but the mortar produced with 5% EPSP still has the very satisfactory water absorption. tensile bond strengths as those of the control. EPSP has no not affect on the paste hydration. But it can also transform the mortar microstructures. It is also evident that heavy metal concentrations in leachates of the mortars with EPSP are far lower than the recommended in the GB5085.3-2007.