Effect of temperature on the hydration of the main clinker phases in Portland cements: Part II, blended cements
Effect of temperature on the hydration of the main clinker phases in Portland cements: Part II, blended cements
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DOI：
10.1016/s0008-8846(98)00107-0
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发表时间：
1998-09-01
影响因子：
11.4
通讯作者：
Sharp, JH
中科院分区：
文献类型：
--
作者：
Escalante-Garcia, JI;Sharp, JH
三种混合水泥的水化，基于先前研究的两种纯水泥，在10 ℃至60 ℃的五个温度下对掺有矿渣、粉煤灰和火山灰的波特兰水泥进行了跟踪。水泥在水下固化，并在一年的时间内以不同的时间间隔进行测试。的水化产物，其特征在于通过定量X射线衍射和热重分析。与纯水泥一样，观察到水化程度的温度反转，导致60 ℃时的水化程度与10 ℃时相比有所降低，但置换材料的存在改变了各个水泥相的水化模式。阿利特、C（3）A和铁素体相的水合作用明显加速，尽管PFA对阿利特水合作用的加速程度不如其他替代材料。在较高的温度下，粉煤灰延缓了贝利特的水化速率，但矿渣或火山灰的存在加速了贝利特的水化速率。甲烷的PFA和火山灰的消耗转移到更早的时间和较低的CH含量在较高的温度下的最大值。(C)1998 Elsevier Science Ltd.
The hydration of three blended cements, i.e., Portland cement blended with GGBFS, PFA, and volcanic ash, based on two neat cements investigated previously, has been followed at five temperatures ranging from 10 degrees C to 60 degrees C. The cements were cured under water and tested at various time intervals over a period of one year. The hydration products were characterised by means of quantitative X-ray diffraction and thermogravimetry. As with the neat cements, a temperature inversion in the degree of hydration was observed, leading to a reduction in the degree of hydration at 60 degrees C compared with that at 10 degrees C, but the presence of the replacement materials changed the hydration patterns of the individual cement phases. There was a clear acceleration of the hydration of alite, C(3)A, and the ferrite phase, although PFA did not accelerate alite hydration to the same extent as the other replacement materials. The rate of hydration of belite was retarded by PFA at higher temperatures, but accelerated by the presence of slag or volcanic ash. The depletion of CH by PFA and volcanic ash was shifted to earlier times and lower maximum values of CH content at higher temperatures. (C) 1998 Elsevier Science Ltd.