Article Number: DRJCMS12129868
ISSN: 2354-4163

Vol.7 (1), pp. 12-19, March 2020

Copyright © 2020

Author(s) retain the copyright of this article

Original Research Article

Compatibility Test of Hybrid Cement with Sawdust and Water Mixes in the Production of Cement Bonded Composite

*Ogunleye, M. B.

Olayiwola, Y. B.

Fabiyi, J. S.


The suitability of hybrid cement, Obeche sawdust, and water using the hydration test were investigated. The effect of calcium chloride (CaCl2) incorporation on the hydration parameters was examined. The hydration parameters considered in this project are maximum hydration temperature (Tmax), setting time (tmax), time ratio (tR), and inhibitory index. Two sets of sawdust (without and with hot water extraction) were used as fiber reinforcement/filler in the cement matrix. Hot water treatment maintained at 80°C for about 2 h was conducted. Coconut shell ash was reacted with 5% calcium hydroxide to produce coconut shell pozzolana. After the production of the pozzolan, two different formulations of hybrid cement were considered which were 80:20 and 60:40 (% basis) of Portland cement to pozzolan. The control was 100% Portland cement. The increase of pozzolan in the hybrid cement showed considerable differences in the hydration reaction. Calcium chloride treatment considerably improved the compatibility of the various hybrid cement with wood particles. The combination of all the hydration parameters employed in this project was evidenced that the two hybrid cement formulated from Portland cement and coconut shell ash pozzolan are compatible with Obeche wood for the production of cement bonded composites.

Keywords: Hybrid cement, pozzolan, hydration, compatible, inhibitory

 Received: February 3, 2020  Accepted: March 26, 2020  Published: March 30, 2020

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