氢氧化钾-钠水玻璃激发剂对碱激发矿渣胶凝材料性能的影响

采用氢氧化钾调节钠水玻璃模数制备复合碱激发剂,以钠水玻璃模数、碱掺量为变量,分析氢氧化钾对钠水玻璃激发矿渣胶凝材料性能的影响,研究氢氧化钾-钠水玻璃激发矿渣胶凝材料在流动度、凝结时间及抗压强度等方面的变化规律。结果表明,氢氧化钾-钠水玻璃复合激发剂的激发效果优于单一钠水玻璃激发剂。当钠水玻璃模数为1.2、碱掺量为8%(质量分数)时,氢氧化钾-钠水玻璃激发矿渣胶凝材料流动度可达240 mm,7 d、28 d抗压强度可达98.88 MPa和104.59 MPa,比同等条件下的钠水玻璃激发矿渣胶凝材料7 d、28 d抗压强度分别提高了16.7%和22.9%。

Effect of Potassium Hydroxide-Sodium Water Glass Activator on Properties of Alkali-Activated Slag Cementitious Materials

Potassium hydroxide was used to adjust the modulus of sodium water glass to prepare compound alkali activator. Taking sodium water glass modulus and alkali content as variables,the effect of potassium hydroxide on sodium water glass activated slag cementitious material performance was analyzed, and the change law of fluidity, setting time and compressive strength of potassium hydroxide-sodium water glass activated slag cementitious material was studied. The results show that the stimulating effects of potassium hydroxide-sodium water glass compound alkali activator are better than those of single sodium water glass activator. When the sodium water glass modulus is 1.2 and the alkali content is 8% (mass fraction), the fluidity of potassium hydroxide-sodium water glass activated slag cementitious materials reaches up to 240 mm, and the compressive strength of 7 d and 28 d reaches up to 98.88 MPa and 104.59 MPa, which is 16.7% and 22.9% higher than that of the sodium water glass activated slag cementitious materials under the same conditions.