摘要
Abstract
In response to the demands of plastic pollution control and low-carbon transformation of road engineering,this paper proposes a dual-blending modified asphalt technology of thermoplastic/thermosetting recycled plastics.The mix ratio was optimized through the L9(34)orthogonal test.The optimal parameters were determined based on indicators such as Marshall stability,rutting stability and freeze-thaw splitting strength ratio,and an environmental benefit evaluation method was proposed.Meanwhile,a 2500-meter test road was paved to verify the long-term performance.The results show that 25％LDPE+60％epoxy resin particles(mixed at 170℃,5.4％oil-to-stone ratio)make the rutting stability of the mixture reach5 680 times/mm(99.3％higher than the conventional),and the freeze-thaw splitting strength ratio is89.2％.During the10-month service period,the rutting depth was only3.2 mm,and the lateral crack rate decreased by64.9％.The carbon emissions per kilometer are 87.5tCO2e,with a reduction of 6.8％.This technology achieves a coordinated improvement in road performance and environmental benefits.关键词
再生塑料/双掺改性/正交优化/路用性能/环境效益Key words
Recycled plastic/Double-admixture modification/Orthogonal optimization/Road performance/Environmental benefits分类
交通工程
