A study on thaumasite form of sulfate attack (TSA) using XRD, TG and SEM
A study on thaumasite form of sulfate attack (TSA) using XRD, TG and SEM
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DOI：
10.1007/s10973-005-7198-2
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发表时间：
2006-04
影响因子：
4.4
通讯作者：
A. Skaropoulou;G. Kakali;S. Tsivilis
中科院分区：
文献类型：
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作者：
A. Skaropoulou;G. Kakali;S. Tsivilis
碳硫硅钙石形式的硫酸盐侵蚀（TSA）涉及含有石灰石的水泥和混凝土，并归因于碳硫硅钙石的形成。这项工作涉及确认碳硫硅钙石形成水泥砂浆。研究了三种类型的水泥：波特兰水泥和含有15和30%质量/质量石灰石的波特兰石灰石水泥。试样在1.8%MgSO4溶液中于5 ℃下固化12个月。通过XRD、TG、SEM等手段对碳硫硅钙石的形成进行了验证。结果表明，含石灰石的砂浆在低温下易发生TSA。XRD、TG和SEM的组合导致碳硫硅钙石的阳性鉴定，并解决了众所周知的碳硫硅钙石和钙矾石混淆的问题。
The thaumasite form of sulphate attack (TSA) concerns cements and concretes containing limestone and is attributed to the formation of thaumasite. This work deals with the confirmation of thaumasite formation in cement mortars. Three types of cement were examined: Portland cement and Portland limestone cement containing 15 and 30% mass/mass limestone. The specimens were cured at 5C, for 12 months, in a 1.8% MgSO4solution. The formation of thaumasite was checked and confirmed by XRD, TG and SEM. It was concluded that mortars containing limestone suffer from TSA at low temperature. The combination of XRD, TG and SEM leads to the positive identification of thaumasite and resolves the well known problem of thaumasite and ettringite confusion.