Unconfined Compressive Strength Development and Microstructure of Calcium Carbide Residue and Biomass Ash Admixed in Compacted Soft Bangkok Clay

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DOI: https://doi.org/10.14456/kmuttrd.2013.4
Keywords:
Biomass Ash Calcium Carbide Residue Soft Bangkok Clay Unconfined Compressive Strength

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Runglawan Rachan
Assistant Professor, Department of Civil Engineering, Faculty of Engineering.
Songsuda Vichan
Lecturer, Department of Civil Engineering, Faculty of Engineering.

Abstract

Abstract

This paper presents the unconfined compressive strength development and microstructure of calcium carbide residue and biomass ash admixed in compacted soft Bangkok clay. The study on microstructure was carried out using Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS) and X – ray Diffraction (XRD). The initial soil water content at 1.2 times of the optimum water content and CCR:BA ratio of 60:40 were found to give a maximum strength for the stabilization. The strength development in both blended cementitious materials admixed in compacted soft Bangkok clay was dependent on cementitious products, which were ettringite and C-A-S-H compound, due to the pozzolanic reaction.

Keywords : Biomass Ash; Calcium Carbide Residue; Soft Bangkok Clay; Unconfined  Compressive Strength

Article Details

Issue
Vol. 36 No. 1 (2013): January - March
Section
Original Articles