To improve the mechanical and durability properties of cement stabilized-macadam,the evolution law of series mechanical properties of cement stabilized-macadam with different PVA fi-ber length and dosage were investigated,and the optimum length and dosage of PVA fiber were de-termined.On this basis,the difference in durability between ordinary cement-stabilized macadam and PVA fiber cement-stabilized macadam was studied by means of freeze-thaw cycle and fatigue test.The results show that the series mechanical properties of PVA fiber cement stabilized-macadam increase and then decrease with the increase of PVA fiber length or dosage.Compared with the oth-er test schemes,the comprehensive performance of PVA fiber cement stabilized-macadam with 12 mm length and 0.9 kg/m3 dosage is the best.At 28 d,after 5,10 and 15 freeze-thaw cycles,the compressive strength retention rate of PVA fiber cement stabilized-macadam with 12 mm length and 0.9 kg/m3 dosage is 90.21％～84.39％.The fatigue life of PVA fiber cement stabilized-macadam with 12 mm length and 0.9 kg/m3 dosage increases by 135.29％～175.01％under 0.7～0.8 stress intensity ratio.
维普
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