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首页> 外文期刊>Materials Research >A Comparative Study Between the Early Stages Hydration of a High Strength and Sulphate Resistant Portland Cement and the Type II F Portland Cement Through Non Conventional Differential Thermal Analysis and Thermogravimetry
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A Comparative Study Between the Early Stages Hydration of a High Strength and Sulphate Resistant Portland Cement and the Type II F Portland Cement Through Non Conventional Differential Thermal Analysis and Thermogravimetry

机译：非常规差热分析和热重分析法对高强度耐硫酸盐硅酸盐水泥和ⅡF型硅酸盐水泥早期水化的比较研究

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摘要

This work presents a study, which compares the early stages of hydration of a High Initial Strength and Sulphate Resistant Portland Cement (HIS SR PC) with those of Type II F Portland Cement (PC II), by Non-Conventional Differential Thermal Analysis (NCDTA) within the first 24 hours of hydration. Water/cement (w/c) ratios equal to 0.5, 0.6 and 0.66 were used to prepare the pastes. The hydration of these two types of cement was monitored on real time by NCDTA curves, through the thermal effects of the hydration reactions, from which cumulative evolved energy curves were obtained. These techniques allow one to analyse the influence of each type of cement on the main stages that occur during the hydration process. Thermogravimetric analysis were also performed at 4 and 24h of hydration for both cements, to analyse the influence of each kind of cement on the amount of the main formed hydrated products. The results showed that with 4h of hydration, the total combined water amount released from the hydrated products was higher for the PC II pastes than for the HIS SR PC pastes. Otherwise, with 24h of hydration, the amount of the total combined water released from the hydrated products was higher for the HIS SR PC pastes than for the PC II pastes.
机译：这项工作提出了一项研究，通过非常规差热分析（​​NCDTA）比较了高初始强度和耐硫酸盐硅酸盐水泥（HIS SR PC）与II F型硅酸盐水泥（PC II）的水合早期阶段。 ）在补水的前24小时内。使用等于0.5、0.6和0.66的水/水泥（w / c）比来制备糊剂。通过水化反应的热效应，通过NCDTA曲线实时监测这两类水泥的水化反应，从而获得累积的演化能量曲线。这些技术使人们能够分析每种水泥对水化过程中主要阶段的影响。还对两种水泥在水合4和24h时进行了热重分析，以分析每种水泥对主要形成的水合产物数量的影响。结果表明，在水合4h后，PC II糊剂从水合产物中释放的总结合水量高于HIS SR PC糊剂。否则，在水合24小时后，HIS SR PC浆料从水合产物中释放的总结合水量要大于PC II浆料。

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