Recent advances in waterglass sand technologies

摘要

This paper reports some new understandings and advances in waterglass sand technologies. Themultiple chemical modification process can increase the binding strength of the waterglass sand by up to 50%-70%.Therefore, the additions of the modified waterglass can be decreased to 3.0%-4.0% for CO2process and to 2.0%-2.5% for organic ester hardening process, and greatly improve the collapsibility and reclaimability of the sand. Basedon the new understandings and experimental results reported in this paper, several original ideas, such as nanomodification, have been proposed to promote advances of waterglass sand technologies