The influence of adding the HS powder and PVA sol together or respectivly on the original and retained strewth, bench life and moisture resistance of the CO_2 sodium silicate sand was studied.

• 研究了HS粉与PVA单独及复合使用后对水玻璃砂初始强度、残留强度,可使用时间以及抗吸湿性的影响。