旧水泥路面板粒化再生混合料级配设计的试验研究

Experimental Study of Gradation Design of Granular Recycled Mix for Old Concrete Pavement

结合旧水泥混凝土路面粒化集料的特性,应用传统级配设计方法与最小空隙率法级配设计理论,对比分析了再生混合料空隙率和密度等物理性能的差异,论证了采用最小空隙率法进行级配设计的合理性。通过比较两种设计方法得出的混合料的无侧限抗压强度和冻融循环试验结果,得出水泥板再生粒化料采用最小空隙率法进行级配设计时,再生混合料的力学性能和耐久性要优于按照传统级配设计方法,且设计方法简单,所需设计参数较少,更符合水泥板粒化料的特性,适宜在工程应用中推广。

Based on the characters of the existing concrete road granulated regeneration aggregate,and using the traditional grading design method and the minimum voidage design method,the differences of the void content and the density of the recycled mix are analyzed,and the gradation designed by the minimum voidage is rational.By the comparison of the test results of the unconfined compression strength and the freeze-thaw cycles through the two different design methods,the mechanical properties and durability of the granulated regeneration aggregate are superior to the traditional method.And at the same time,the minimum voidage method is simple and need the less design parameters,thus it suits to be popularized in the future engineering.