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Abstract Mutually demolishing and eroding occur between the alkaline reinforcement material and the acidic laterite. The alkali erosion tests were designed for laterite based on the chemical analysis of the materials and the principle of life acceleration. The content changes of the effective ions representing the losses of crucial substances in laterite were detected from the leachate from the eroded laterite of the control experiments. Main engineering indices were tested on virgin and eroded laterite to obtain the degradation of the engineering qualities of laterite. The relationships between the ion contents and the engineering indices were established and analysed. The relationships between the engineering indices and the losses of chemical substances were studied using the stepped regression analysis of multiple variables. The effect of effective ions on engineering quality was thoroughly discussed with the relationships derived. Significant quantitative correlations exist between the changes of main engineering indices and the losses of chemical substances in laterite eroded by alkali. Degradation mechanism of the laterite eroded by alkali was revealed，which may be useful for analyzing the speed and trend of deterioration in laterite engineering.
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Received: 26 January 2014
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2014, Vol. 33 
