干粉激发煤矸石基地质聚合物的性能研究

将氢氧化钠与碳酸钙混合制备碱性干粉激发剂，并与煤矸石、粉煤灰混合制备地质聚合物胶凝材料，对碱性干粉激发剂特性，聚合物材料的凝结时间、吸水率、抗压强度等基本特性进行研究，并与采用氢氧化钠溶液激发剂的聚合物特性进行对比。结果表明：生成得到的聚合物的浓度与干粉激发剂中碳酸钙的量成反比；与采用氢氧化钠溶液激活的聚合物相比，采用干粉激发剂激发的聚合物凝结时间短、吸水率低、抗压强度高，说明干粉激发剂有独有优势。干粉激发聚合物的吸水率随水灰比的增加而增加，需注意控制水灰比；干粉激发聚合物抗压强度与干粉激发剂中的氢氧化钠浓度有关，氢氧化钠的浓度过高或过低都会导致抗压强度下降。

Study on Coal Gangue Based Geopolymer Characteristics with Dry Powder Activator

Sodium hydroxide and calcium carbonate powder was mixed together to produce alkaline dry powder activator. Geopolymer cementing material was made with coal gangue, fly ash and the dry powder activator. Characteristics of the dry powder activator, setting time, absorption rate and compressive strength of the geopolymer were studied. Comparison was made with those activated by sodium hydroxide solution. The results showed that concentration of the geopolymer was adversely proportional to calcium carbonate in dry powder activator. Compared with geopolymer activated by sodium hydroxide solution, geopolymer activated by dry powder activator has shorter setting time, low absorption rate and higher compressive strength, which shows unique advantage of dry powder activator. Absorption rate of dry powder activator geopolymer increases with the increase of water cement ratio. It is necessary to control water cement ratio. Compressive strength of dry powder activator geopolymer is related to concentration of sodium hydroxide in dry powder activator, too high or low concentration leading to a decline of compressive strength.