Abstract
Laterite constitutes a mixture of hydrous iron and aluminium oxides and kaolinite along with quartz. Since the normal firing schedules used for the consolidation of clays are not suitable for laterites, attempts have been made to use a chemical binder for their consolidation. Studies based on thermal analysis and infrared spectroscopy reveal that phosphoric acid could react with kaolinite and hydrous iron oxide and the products formed from the reaction could act as tile binding phase. The increase in compressive strength of the blocks of laterite after reaction with phosphoric acid has been explained on the basis of differential thermal analysis, infrared spectral data and certain mineralogical investigations.
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