Browsing School of Science and Computing (JA) by Author "Njau, Karoli N."

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Influence of scoria and pumice on key performance indicators of Portland cement concrete

Mboya, Hieronimi A.; Njau, Karoli N.; Mrema, Alex L.; King’ondu, Cecil K. (Elsevier, 2019-02)

Cement industries have a huge CO2 signature that can be reduced in an effort to mitigate climate change via precise cement substitution with supplementary cementing materials (SCMs). The substituting materials and their ...
Measurement of pozzolanic activity index of scoria, pumice, and rice husk ash as potential supplementary cementitious materials for portland cement

Mboya, Hieronimi A.; King’ondu, Cecil K.; Njau, Karoli N.; Mrema, Alex L. (Hindawi Publishing Corporation, 2017-08)

This work investigated the properties of scoria and pumice as supplementary cementitious materials (SCMs) for Portland cement and compared to those of rice husk ash (RHA). X-ray fluorescence, X-ray diffraction, and pozzolanic ...

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