CHARACTERISTICS OF CHLORIDE DIFFUSION AND PORE VOLUME IN CERAMIC WASTE AGGREGATE MORTAR CONTAINING GGBS
CHARACTERISTICS OF CHLORIDE DIFFUSION AND PORE VOLUME IN CERAMIC WASTE AGGREGATE MORTAR CONTAINING GGBS
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DOI：
10.21660/2016.26.35860
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发表时间：
2016
影响因子：
0.7
通讯作者：
H. Higashiyama
中科院分区：
文献类型：
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作者：
H. Higashiyama
以某电力公司提供的电瓷绝缘子废料为原料，将其粉碎粉碎，制成陶瓷废骨料。研究了含矿渣颗粒砂浆作为一种生态高效砂浆。水胶比（W/B）分别为0.4、0.5和0.6。采用GGBS作为辅助胶凝材料，增强了抗氯离子侵入性。用20%和40%的GGBS代替部分CWA砂浆，在5% NaCl溶液中浸泡48周和96周。采用电子探针微分析（EPMA）和压汞法测定了不同浸渍时间下氯化物的扩散和孔径分布。CWA砂浆抗氯离子侵入的效果与GGBS置换水平成正比。在W/B为0.6时，除无GGBS的CWA外，表观氯化物扩散系数沿浸渍时间变化不大。此外，表观氯离子扩散系数与孔径小于0.1 μm的累积孔体积密切相关。
Ceramic waste aggregates (CWAs) were made from electric porcelain insulator wastes supplied from an electric power company, which were crushed and ground to fine aggregate sizes. The CWA mortar as an eco-efficient has been investigated containing ground granulated blast-furnace slag (GGBS). The water-to-binder ratio (W/B) of the CWA mortars was varied at 0.4, 0.5, and 0.6. The GGBS, which enhances the chloride ingress resistance, was utilized as a supplementary cementitious material. The CWA mortars partially replaced by the GGBS at 20% and 40% were immersed into a 5% NaCl solution for 48 and 96 weeks. The chloride diffusion and the pore size distribution were assessed by using an electron probe microanalysis (EPMA) and a mercury intrusion porosimetry at each immersion time. The resistance to the chloride ingress of the CWA mortar was effective in proportion to the GGBS replacement level. The changing of the apparent chloride diffusion coefficients except for the CWA without the GGBS at the W/B of 0.6 was small along the immersion time. Moreover, the apparent chloride diffusion coefficient was well related to the cumulative pore volume less than 0.1 μm of pore diameter.