Effect of carbon dioxide on chloride penetration and chloride ion diffusion coefficient of blended Portland cement mortar
Effect of carbon dioxide on chloride penetration and chloride ion diffusion coefficient of blended Portland cement mortar
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DOI：
10.1016/j.conbuildmat.2007.06.002
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发表时间：
2008-08-01
影响因子：
7.4
通讯作者：
Sirivivatnanon, Vute
中科院分区：
文献类型：
--
作者：
Chindaprasirt, Prinya;Rukzon, Sumrerng;Sirivivatnanon, Vute
研究了CO2对棕榈油粉煤灰（POA）、稻壳粉煤灰（RHA）和分级粉煤灰（FA）混合波特兰水泥砂浆氯离子渗透和氯离子扩散系数的影响。普通波特兰水泥（OPC）部分地被火山灰和火山灰的混合物替代。砂浆与恒定的水水泥比和类似的流量用于测试。本研究使用了5%CO2的加速测试环境。对水泥砂浆进行了快速氯离子渗透试验（RCPT）、改良快速迁移试验（MRMT）和3%NaCl溶液浸泡30 d后的氯离子渗透深度测定。对于OPC砂浆，通过RCPT、MRMT和NaCl浸泡试验测量，暴露于二氧化碳环境不会降低砂浆的抗氯离子渗透性。然而，暴露于二氧化碳显着降低含火山灰砂浆的抗氯离子渗透性。这一减少与火山灰的更换量有关。(c)爱思唯尔有限公司出版
This paper presents a study of the effects of carbon dioxide on chloride penetration and chloride ion diffusion coefficient of blended Portland cement mortar containing ground palm oil fuel ash (POA), ground rice husk ash (RHA) and classified fly ash (fine fly ash, FA). Ordinary Portland cement (OPC) is partially replaced with pozzolan and blends of pozzolans. Mortars with constant water to cement ratio and similar flow were used for the tests. This research used accelerated testing environment with 5% CO2. Rapid chloride penetration test (RCPT), modified rapid migration test (MRMT) and chloride penetration depth after 30 days of immersion in 3% NaCl solution of mortars were determined on the mortars with and without exposure to carbon dioxide environment. For OPC mortar, the exposure to carbon dioxide environment does not lower the chloride penetration resistance of mortar as measured by RCPT, MRMT and NaCl immersion test. However, the exposure to carbon dioxide significantly decreases the chloride penetration resistance of mortar containing pozzolans. This decrease is related to the replacement level of pozzolans. (c) Published by Elsevier Ltd.