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A study on use of waste polyethylene in bituminous paving mixes

机译:废聚乙烯在沥青混合料中的应用研究

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摘要

Bituminous mixes are most commonly used all over the world in flexible pavement construction. It consists of asphalt or bitumen (used as a binder) and mineral aggregate which are mixed together, laid down in layers and then compacted. Under normal circumstances, conventional bituminous pavements if designed and executed properly perform quite satisfactorily but the performance of bituminous mixes is very poor under various situations. The present locally available OMFED polyethylene used as stabilizer in SMA, BC and DBM mixes to fulfil the present requirements of paving mixes. Optimum binder content (OBC) and optimum polyethylene content (OPC) have been derived by using Marshall Procedure. The OBCs have been found to be 4% for SMA and 4.5% for both BC and DBM by using stone dust as filler. By replacing some gradation of fine aggregate by granulated blast furnace slag and fly ash as filler the OBCs have been found to be 5% of bitumen for SMA and 4% of bitumen for both BC and DBM mixes. Similarly, OPC has been found to be 2% by weight of mixes for SMA and DBM and 1.5% for BC mixes where stone dust has been used as filler. After replacement of some gradation of fine aggregate by slag and considering fly ash as filler the OPCs have been found to be 1.5% of polyethylene for all types of mixes. Then considering OBC and OPC, the SMA, BC, and DBM mixes have been prepared and different performance tests like Drain down test, Static indirect tensile Strength Test and Static Creep test have been carried out to evaluate the effects of polyethylene as an stabilizer on mix properties. It is concluded from present investigation that addition of OMFED Polyethylene to mixes improve the mix properties like Marshall Stability, Drain down characteristics and indirect tensile strength.
机译:沥青混合料在世界各地最常用于柔性路面施工中。它由沥青或沥青(用作粘合剂)和矿物骨料组成,它们混合在一起,分层放置然后压实。在正常情况下,传统的沥青路面如果设计和执行得当,效果会令人满意,但沥青混合物的性能在各种情况下都非常差。当前本地可用的OMFED聚乙烯在SMA,BC和DBM混合物中用作稳定剂,以满足目前对摊铺混合物的要求。最佳粘合剂含量(OBC)和最佳聚乙烯含量(OPC)已通过使用Marshall程序得出。通过使用石粉作为填充剂,发现SMA的OBC为4%,BC和DBM的OBC为4.5%。通过用粒状高炉矿渣和粉煤灰作为填料代替一些细骨料,已发现SMA的OBC为5%的沥青,而BC和DBM混合物均为4%的沥青。同样,在石粉已被用作填料的情况下,发现SMA和DBM的混合物的OPC含量为2%,而BC混合物的含量为1.5%。在用炉渣代替某些等级的细骨料并考虑使用粉煤灰作为填料后,发现对于所有类型的混合物,OPC均为聚乙烯的1.5%。然后考虑到OBC和OPC,制备了SMA,BC和DBM混合物,并进行了不同的性能测试,例如排水试验,静态间接拉伸强度测试和静态蠕变测试,以评估聚乙烯作为稳定剂对混合物的影响属性。从目前的研究得出的结论是,向混合物中添加OMFED聚乙烯可改善混合物的性能,例如马歇尔稳定性,排水特性和间接拉伸强度。

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    Mohanty Monika;

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