论文部分内容阅读
通过黄河泥沙的活性指数(PAI)和活性率(K)以及黄河泥沙基生土砌块的抗压强度和软化系数,来评价CaCl_2,CaCl_2与水玻璃复合激发剂对黄河泥沙的活化效果,并通过FTIR和XRD分析了CaCl_2的活化机理.结果表明:CaCl_2与水玻璃质量比为1∶1的复合激发剂能够明显改善黄河泥沙的反应活性,其用量为6%(质量分数)时,胶砂试件的活性指数达到0.63;CaCl_2通过Ca~(2+)与黏粒中Na~+的离子交换作用,加速黏土矿物的水解并释放出硅铝离子,从而提高黄河泥沙的反应活性,改善黄河泥沙基生土砌块的力学性能.
Through the activity index (PAI) and activity rate (K) of the Yellow River sediment and the compressive strength and softening coefficient of the Yellow River sediment-based soil mass, the activation of the Yellow River sediment by CaCl2, CaCl2 and water glass complex stimulants And the activation mechanism of CaCl_2 was analyzed by FTIR and XRD.The results showed that the composite activator with the mass ratio of CaCl_2 and water glass of 1: 1 could obviously improve the reactivity of sediment in the Yellow River with the dosage of 6% (mass fraction) , The activity index of the mortar reaches 0.63; CaCl_2 accelerates the hydrolysis of clay minerals and releases the aluminosilicate ions through the ion exchange between Ca 2+ and Na + in the clay so as to improve the sediment Reactivity to improve the mechanical properties of the Yellow River silt - based soil mass.