Characteristics of chloride ingress into mortars containing ceramic waste aggregate
Characteristics of chloride ingress into mortars containing ceramic waste aggregate
复制标题
含陶瓷废骨料砂浆中氯化物侵入特征
DOI：
10.1007/s10163-014-0264-8
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
津熊 茂
中科院分区：
文献类型：
--
作者：
東山浩士;M. Sappakittipakorn;佐野正典;高橋 修;津熊 茂
利用电子探针显微分析仪研究了含陶瓷废骨料砂浆的氯离子侵入特性。以电瓷绝缘子废弃物为原料，经破碎、研磨等工艺制备了CWA。研究了用CWA代替全部细集料的CWA砂浆与典型河砂（RS）砂浆的对比。对于两种砂浆，水与水泥的比率（W/C）在0.4、0.5和0.6下变化。通过在5.0重量%氯化钠溶液中浸泡24、48和96周，将氯化物引入砂浆。很明显，CWA砂浆比RS砂浆具有更小的氯离子渗透。此外，为了证明CWA如何减少氯化物进入，进行CWA和RS砂浆的孔径分布或在模拟孔溶液的高碱性溶液中CWA和RS颗粒上的ζ电位。CWA砂浆比RS砂浆具有低得多的孔体积，而两种颗粒的zeta电位没有显著差异。因此表明孔径分布比zeta电位具有更大的影响。
The characteristics of chloride ingress into mortar containing ceramic waste aggregate (CWA) were investigated by using an electron probe micro-analyzer. The CWA was produced from electric porcelain insulator wastes via the processes of crushing and grinding. The CWA mortar in which entire fine aggregate was replaced with the CWA was studied in comparison with typical river sand (RS) mortar. For both mortars, the water to cement ratio (W/C) was varied at 0.4, 0.5, and 0.6. The chloride ingress was introduced to the mortars through the immersion in a 5.0 wt% sodium chloride solution for 24, 48, and 96 weeks. It is clearly evident that the CWA mortar had smaller chloride penetration than the RS mortar. Furthermore, to manifest how the CWA reduced the chloride ingress, either the pore size distribution of the CWA and the RS mortars or the zeta potential on the CWA and the RS particles in a high-alkaline solution simulating the pore solution was conducted. The CWA mortars had much lower pore volume than the RS mortars, whereas the zeta potential of both particles was not markedly different. It was thus indicated that the pore size distribution is of greater influence than the zeta potential.