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Dynamic mechanical thermo-analysis of Portland cement paste hydrated for 45 years

机译:水化45年的硅酸盐水泥浆的动态力学热分析

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摘要

The effect of prolonged hydration of Portland cement paste on engineering behavior was investigated using dynamic mechanical thermo-analysis (DMTA) methods. Specimens ranged in age from 3 days to 45 years. Compacts of hydrated cement powders and normally hydrated paste specimens were tested. Age dependent nanostructural characteristics of C-S-H were shown to influence the mechanical response of cement paste. Evidence was provided to support the use of compacts as structural models for hydrated cement paste. Details of ageing effects on the DMTA parameters (storage modulus and internal friction) as a function of temperature and porosity are reported.
机译:使用动态机械热分析(DMTA)方法研究了波特兰水泥浆长时间水化对工程行为的影响。标本的年龄从3天到45岁不等。测试了水合水泥粉和正常水合糊状样品的压块。 C-S-H的随年龄变化的纳米结构特征显示出会影响水泥浆的机械响应。提供了证据支持将压坯用作水合水泥浆的结构模型。报告了老化对DMTA参数(储能模量和内摩擦)随温度和孔隙率变化的影响的详细信息。

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