摘要
通过正交实验分析了固化体的最佳质量配比,研究了掺不同水样对固化体性能的影响,并采用浓缩脱硫废水作为掺和物,研究了固化体对结合Cl-能力的影响。结果表明:固化体的最佳质量配比为m(水泥):m(粉煤灰):m(高盐水):m(河砂)=0.97:0.17:0.60:0.98;水中Cl-与水泥中铝酸三钙相生成的Friedel's盐能提高固化体抗压强度;浓缩脱硫废水中的硫酸盐会导致结合Cl-能力下降,Cl-浸出率升高;固化体中自由Cl-质量分数较高,可用作无钢筋材料或路缘石等。
Orthogonal experiments were carried out to determine the optimal mass ratio of various components in the solidified wastewater, and to study the effects of different water samples on the properties of the blocks. Taking the concentrated desulfurization wastewater as the blending medium, the chloride ion binding ability of the solidified desulfurization wastewater was researched. Results show that the optimal mass ratio of the solidified body is as follows:cement:fly ash:high-salt brine:sand=0.97:0.17:0.60:0.98;the Friedel's salt formed by the reaction of Cl- in water with C3A in cement could increase the compressive strength of the blocks;the sulfate in concentrated FGD wastewater reduces the Cl- binding capacity and increases the Cl- leaching rate of the blocks;solidified blocks with high content of free Cl- could be taken as the non-reinforced materials or road stones, etc.
作者
马双忱
向亚军
陈嘉宁
万忠诚
张净瑞
柴晋
MA Shuangchen;XIANG Yajun;CHEN Jianing;WAN Zhongcheng;ZHANG Jingrui;CHAI Jin(Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, Hebei Province, China;Shengfa Environmental Technology (Xiamen) Co., Ltd., Xiamen 361000, Fujian Province, China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2019年第9期740-746,共7页
Journal of Chinese Society of Power Engineering
关键词
脱硫废水
水泥固化
正交实验
结合CL^-能力
CL^-浸出率
desulfurization wastewater
cement-based solidification
orthogonal experiment
Cl- binding capacity
Cl- leaching rate
