Consistent Foamed Asphalt Contents Needed for Cold In-Place Recycled Pavement Layers in Practice

H. Lee, Byungkyu Moon, A. Buss, C. Jahren
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Abstract

Cores were recovered from the right wheel path and between wheel paths at 8 locations US 34 in Mills and Wapello Counties. The cores were cut into discs to isolate the pavement layers and the discs were fabricated into semicircular bending test specimens. Asphalt contents among CIR cores varied significantly and that CIR specimens with higher asphalt binder contents exhibited higher flexibility index values. From the output of these tests, the CIR pavement layers were found to be more flexible in comparison to the HMA layers, that CIR layers have higher flexibility that allow them to serve as a stress relieving layer and mitigate reflective cracking.
冷就地再生铺装层需要一致的发泡沥青含量
在Mills和Wapello县的8个地点的右轮径和轮径之间回收了岩心。将岩心切割成圆盘,隔离路面层,并将圆盘制作成半圆形弯曲试件。不同CIR岩心沥青含量差异显著,沥青粘结剂含量越高的CIR试件柔韧性指数值越高。从这些测试的结果来看,与HMA层相比,CIR路面层具有更大的灵活性,CIR层具有更高的灵活性,可以作为应力释放层并减轻反射裂缝。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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