采用旋转黏度计、流变仪研究了硅酸钠溶液模数、质量分数及温度对硅酸钠溶液及土聚新拌物流变性能的影响；探讨了硅酸钠溶液超声改性对土聚新拌物工作性能的改善效果.结果表明：常温(18~25℃)下，硅酸钠溶液黏度在其模数为2.2时出现最小值，但随着温度的升高，模数对溶液黏度的影响逐渐减弱.当硅酸钠溶液处于真溶液区域(模数<1.8)时，土聚新拌物黏度随硅酸钠溶液模数增大变化不大; 当硅酸钠溶液处于水玻璃SiO2聚合区域(模数>2.2)时，土聚新拌物黏度随硅酸钠溶液模数增大急剧增加.硅酸钠溶液质量分数越高，硅酸钠溶液和土聚新拌物的黏度均越大.在硅酸钠溶液温度为30℃时，土聚新拌物的黏度达到最低值.硅酸钠溶液超声改性可改善其黏度，增大土聚新拌物的扩展度，并提高土聚物的抗压强度.

The effect of modulus, mass fraction and temperature of sodium silicate solution(SS) on the rheological characteristics of SS and geopolymer slurry(GS) were analyzed by means of viscometer and rheometer. Meanwhile, the effect of SS modified by ultrasonic on the workability of GS was studied. The results show that the viscosity of SS for 2.2 modulus get the minimum value in ambient temperature(1825℃), but the effect of modulus on viscosity of SS is gradually weaker with the raise of temperature. When SS is in the true solution(highionized) zone(modulus<1.8), the difference of GS viscosity of different SS modulus is little, while in the water glass(SiO2polymerized) zone(modulus>2.2), the viscosity of GS increases sharply with the increase of modulus of SS. With increasing of the mass fraction of SS, both viscosity of GS and SS are all increased.The viscosity of GS gets the minimum value at 30℃ in different SS modulus. The SS modified by ultrasonic could improve the fluidity of GS and increase the compressive strength of geopolymer.

广州市科技攻关引导项目(2004D038)