【摘要】 针对目前水玻璃砂应用中存在的缺陷，本交通过大量实验，找到了一种新型的复合改性剂．该改性方法不仅工艺简单，而且可使水玻璃加入量降到3．5％，此时，即=0．52MPa、24h=2．39MPa，比未改性的提高117％，残＜0．40MPa．具有优良的工艺性能．更多还原

【Abstract】 A new complex modifing agent was found whicb can resolve the problem ekisting in tbe application ofsodium silicate among casting. If this modifing technology is used,the filling amount of sodium silicate can be reducedto3. 5 %. Atthemeantime, the initialstrengthofthissodiumsilicatesandis 0. 52MPa, theultimatestrengthis2. 39MPa which is 1. 17 times higher than the strength of the un-modified sodium silicate sand,And the other castingper formances of this modified sodium silicate sand are also good.更多还原