This paper discussed the CO2 blowing harden technique and how the property of waterglass, sand influence on the strength and collapsibility of VRH-CO2 water-glass sand,and has usedin production and employment.

• 本试验探索了水玻璃砂在真空状态下吹CO2气体的硬化工艺及水玻璃、原砂性能对VRH－CO2法水玻璃砂强度及清散性的影响，并进行了生产应用试验。