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| Influence of construction waste composite powder on mechanical and shrinkage properties of cement stabilized aggregate |
| Key Laboratory of Highway Engineering in Special Region of Ministry of Education， Chang′an University， Xi′an， Shaanxi 710064， China |
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Abstract In order to alleviate semi-rigid base cracking, the mechanical and shrinkage properties of cement stabilized aggregate were investigated with different construction waste composite powder materials (CWCPM) dosage. The improved effect of CWCPM on the microcosmic mechanism of cement stabilized aggregate was analyzed through DSC-TG thermal analysis. The results show that the 28 d unconfined compressive strength and the 90 d flexural strength of the specimens are improved by CWCPM. The shrinkage performance of cement stabilized aggregate was also improved. The CWCPM has good filling effects to improve the compactness of the cement base material. The powder materials of CWCPM have good superposition and volcano ash effects, which improves the composition of cement hydration products to reduce Ca(OH)2 content.
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Received: 21 July 2015
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2016, Vol. 37 
