Effect of particle size on early heat evolution of interground natural pozzolan blended cements

Date

2019-05-10

Author

Ardoğa, Mehmet Kemal
Erdoğan, Sinan Turhan
Tokyay, Mustafa

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Natural pozzolans are increasingly being used in blended cements due to their compositional uniformity and local abundance in some countries. They influence hydration, both at early and late ages. A control portland cement and three interground cements containing natural pozzolan were produced using a laboratory ball mill and sieved through 10-mu m, 35-mu m and 50-mu m sieves to yield different cement size subgroups. The heat evolution of each subgroup was investigated up to 2 days using isothermal calorimetry. The compositions of the size subgroups and their early hydration behaviors were found to differ from those of the unsieved cement subgroups. Subgroups containing finer pozzolan particles had higher heat of hydration due to the nucleation effect. In the coarse cement subgroups with relatively lower amounts of clinker, the dilution effect was dominant. It was shown that early heat evolution characteristics of cements can be controlled, among other ways, by adjusting the particle size distribution.

Subject Keywords

lntergrinding, Natural pozzolan, Cement, Particle size, Heat, Hydration

URI

https://hdl.handle.net/11511/30790

Journal

CONSTRUCTION AND BUILDING MATERIALS

DOI

https://doi.org/10.1016/j.conbuildmat.2019.02.055

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

M. K. Ardoğa, S. T. Erdoğan, and M. Tokyay, “Effect of particle size on early heat evolution of interground natural pozzolan blended cements,” CONSTRUCTION AND BUILDING MATERIALS, pp. 210–218, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30790.