Evaluation of Laboratory and Field Performance of High Performance Cold Mix Patching Material with Reduced Volatile Organic Compound Content

摘要

Laboratory and field performance of a High Performance Cold Mix (HPCM) utilizing a cutback asphaltcement binder that is compliant with potential Volatile Organic Compound (VOC) restrictions anticipatedto be implemented by Environment Canada was evaluated.An HPCM cutback asphalt binder meeting an ASTM D402 distillation test criteria limiting the VOCcontent to 0.5 percent at 260 degrees Celsius was developed and used in a production trial of reducedVOC compliant HPCM patching material. A conventional HPCM cutback asphalt binder with a VOC of38.5 percent at 260 degrees Celsius served as the control. Bulk stockpiles of reduced VOC andconventional HPCM were produced in a cold process using a pug mill with wet and unheated aggregates.A laboratory evaluation of stockpile field samples over a five month period found that both the low VOCcontent and conventional HPCM materials had acceptable properties in terms of low temperatureworkability, mix cohesion, moisture sensitivity, compaction at low temperatures, and draindown.The field performance of the non VOC and conventional HPCM was monitored over a four month periodunder slow moving heavy construction vehicle traffic. Both materials performed well when evaluated forbleeding, dishing, disintegration of the cold mix material along the edge of the pothole, missing coldpatch, raveling, and shoving.