Prediction on mechanical properties of slurry-based and cement-fly ash-stabilized macadam
Yingjun Jiang · Journal of Guangxi University · 2013
In order to reveal the influence of slurry strength on cement-fly ash-stabilized macadam performance,strength characteristics of cement-fly ash slurry and cement-fly ash fine aggregate slurry of different proportion were studied.The influence of slurry strength and age on the mechanical properties of the cement-fly ash gravel was analyzed.Finally,the mechanical properties of slurry strength based and cement-fly ash stabilized macadam was predicted.The results indicate that along with the increase of age and the decrease of dosage ratio of cement-fly ash,the strength of fly ash cement slurry increases;in the first 60 d,along with the increase of age and dosage ratio of fine aggregate-fly ash,the strength of cement-fly ash fine aggregate slurry increases;after 60 d,the strength of cement-fly ash fine aggregate slurry increases first and then decreases with the increase of the dosage ratio of fine aggregate-fly ash;there is a high correlation between the slurry strength and the mechanical properties of cement-fly ash stabilized macadam;the proposed prediction equation has clear physical meaning and correlates well with the strength change of cement-fly ash stabilized macadam;in cement-fly ash stabilized macadam,the suggested proportions of fly ash and cement are 4%～6% and 3%～4%,respectively.