宋光辉1,2
临海结构混凝土盐雾干湿循环试验研究
宋光辉1,2
摘 要:采用盐雾试验箱进行临海结构混凝土盐雾干湿循环条件下抗氯离子侵蚀性能的相关研究,系统研究了干湿循环制度、盐雾浓度以及矿物掺合料掺量等影响因素。研究结果表明,干湿时间比越大,氯离子含量越大,氯离子侵蚀越严重;盐雾浓度越大,氯离子含量越高;粉煤灰、磨细矿渣的掺入可提高临海结构混凝土材料抗氯离子侵蚀性能,粉煤灰掺量不宜超过40%,当粉煤灰和磨细矿渣掺量各25%时,氯离子含量最低,临海结构混凝土抗氯离子侵蚀性能最佳。
Abstract: Salt spray chamber was used to study on resistance to chloride corrosion performance of coastal structural concrete under salt spray dry-wet cycle. The influence factors including dry-wet cycle system, salt concentration and mineral admixture dosage were studied systematically. The results show that chloride ion content increases with the increase of the dry-wet time ratio or salt concentration. The resistance to chloride ion penetration performance of coastal structural concrete can be improved by using fly ash and slag. The content of fly ash should not exceed 40%. The chloride ion content is lowest, when fly ash and slag is each 25% of binder, the coastal structural concrete obtain the best resistance to chloride ion penetration performance.
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