Incorporating rubber aggregates grinding from end-of-life waste tires into cement- based materials could help improve the resistance of the composites to shrinkage cracking. However, few studies were found on rubber aggregate incorporation into cement-treated base materials. This study added rubber aggregates size 1-3 mm to cement-treated aggregates type Dmax25 (4% cement) at different contents of 1%, 2% and 5%, by weight of dry graded aggregates. These rubberized cement-treated materials were then assessed in the laboratory to determine fundamental mechanical properties. Two pavement segments were also constructed using the composites incorporating 0% and 2% rubber aggregates. The results showed that the cement-treated base materials contained 0%, 1% and 2% rubber aggregates that met the mechanical properties requirements for pavement bases. In addition, two transverse cracks (1 mm wide and 3,25 m long) appeared in the reference cement-treated base (without rubber aggregates) 30 days after the pavement was paved, whereas the one incorporating rubber aggregate was still intact. This observation demonstrated that rubber aggregates could help the cement-treated base reduce shrinkage and limit resulting cracking. The research promotes using crumb rubber aggregates from waste tires in pavement construction, limiting environmental pollution caused by end-of-life tires.
Lọc theo danh mục
Lượt truy cập :
18,644,422
Xem toàn văn