Research on Effect of Material Composition of Emulsified Asphalt Cold-recycled Mixture on Its Low-temperature Crack Resistance Property
In order to solve the problem of insufficient low-temperature crack-resistance property of in-situ cold-recycled mixture,the effects of mineral powder,machine-made sand and 9.5 mm～19 mm coarse aggregate on the low-temperature crack-resistance property of cold-recycled mixture are compared and analyzed by indirect tension(IDT),semi-circular bending(SCB)and other test methods.The research shows that the fracture work(W)of IDT test and the fracture energy(Gf)of SCB test can distinguish the low-temperature property of different types of cold-recycled mixtures with a small data variability(about 12%and 15%respectively).Compared without mineral powder,the W and Gf of the cold recycled mixture with 3%mineral powder are increased by 116%and 45%respectively.When the content of manufactured sand is 20%～30%,W and Gf can be increased by 45%and 37%respectively compared with that without manufactured sand.When the content of 9.5 mm～19 mm coarse aggregate is 10%～30%,W and Gf can be increased by at least 92%～130%and 38%～50%respectively compared with that without coarse aggregate.It is suggested that the content of 9.5 mm～19 mm coarse aggregate in the cold-recycled mixture is 10%～30%,the content of manufactured sand is 20%～30%,and the content of mineral powder is 3%.
万方数据
维普
