Geopolymers
Inorganic polymeric new materials
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Tongsheng Zhang
Tongsheng Zhang
Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, China
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Qijun Yu
Qijun Yu
Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, China
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Jiangxiong Wei
Jiangxiong Wei
Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, China
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Peng Gao
Peng Gao
Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, China
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Pingping Zhang
Pingping Zhang
Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, China
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Abstract
To optimize the hydration process of blended cement, cement clinker and supplementary cementitious materials (SCMs) were ground and classified into several fractions. Early hydration process of each cementitious materials fraction was investigated by isothermal calorimeter. The results show fine cement clinker fractions show very high hydration rate, which leads to high water requirement, while fine SCMs fractions present relatively high hydration (or pozzolanic reaction) rate. Cement clinker fractions in the range of 8–24 μm show proper hydration rate in early ages and continue to hydrate rapidly afterward. Coarse cement clinker fractions largely play “filling effect” and make little contribution to the properties of blended cement regardless of their hydration activity (or pozzolanic activity). The hydration process of blended cement can be optimized by arranging high activity SCMs, cement clinker, and low activity SCMs in fine, middle, and coarse fractions, respectively, which not only results in reduced water requirement, high packing density, and homogeneous, dense microstructure, but also in high early and late mechanical properties.
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| Journal of Thermal Analysis and Calorimetry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1969 |
| Volumes per Year |
1 |
| Issues per Year |
24 |
| Founder | Akadémiai Kiadó |
| Founder's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. |
| Publisher | Akadémiai Kiadó Springer Nature Switzerland AG |
| Publisher's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11. |
| Responsible Publisher |
Chief Executive Officer, Akadémiai Kiadó |
| ISSN | 1388-6150 (Print) |
| ISSN | 1588-2926 (Online) |
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Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
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