Study on the Adsorption Properties of Regenerated Micropowder toPolycarboxylic Acid Water-reducing Agents
ZHOU Wenjuan1,2, XIE Qian1, ZHAO Lei3
1 College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture; 2 Beijing Engineering Research Center for Engineering Structure and New Materials, Beijing 100044, China; 3 Shougang Environment Industry Co.,Ltd., Beijing 100041, China
Abstract: Regenerated micropowder is a fine powder produced in the process of resource utilization of construction waste, with porous and rough surface properties. In this experiment, the specific surface area, net slurry flow and TOC content of the regenerated micropowder were determined to analyze and evaluate the effect of regenerated micropowder on the adsorption performance of polycarboxylic acid water-reducing agent. The results showed that the finer the micropowder, the stronger the adsorption of water-reducing agent; the adsorption of water-reducing agent was significant in pores from 20 nm to 100 nm.
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