Research on the Road Performance of Rubber Powder Fiber Composite Modified Cement Stabilized Macadam
In this paper,with ordinary cement stabilized macadam,rubber powder modified cement stabilized macadam and fiber-modified cement-stabilized macadam as the control group,the dry shrinkage resistance,frost resistance,impact resistance,and mechanical properties of rubber and fiber composite-modified cement-stabilized macadam is studied.The results show that:(1)the improvement of dry shrinkage resistance and frost resistance of rubber powder to cement-stabilized macadam is better than that of PAV fiber,and the impact resistance of PAV fiber is better than that of rubber powder.(2)After rubber and fiber composite modification,the 28-day dry shrinkage strain of cement-stabilized macadam decreases by 72.3％,the strength loss after the freeze-thaw cycle decreases by 74.8％,and the initial cracking impact toughness increases by 317.7％.(3)The mechanical properties of cement-stabilized macadam can be decreased by rubber powder modification,and the strength loss caused by rubber powder modification can be compensated by rubber and fiber composite modification.The mechanical strength of cement-stabilized macadam after composite modification is the same as that of ordinary cement-stabilized macadam.
semi-rigid basecement stabilized macadamcomposite modification of rubber powder and fiberdry shrinkage resistancefrost resistanceimpact resistance
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