Evaluation of Water Absorption Performance onMechanical Strength and Durability of ConcreteContaining Granules of Recycled Polyethylene

With the increasing use of alternative materials in concrete construction, the need for acomprehensive study of the performance of such materials in concrete is inevitable. One of thebiggest environmental challenges around metropolitan areas is how to recycle and removeplastic waste from the environmental cycle. The recycling cycle of these materials is very longand costly. Long service life is considered synonymous with durability. Because durabilityunder one set of conditions does not necessarily mean durability under another set of conditions,it is common to refer to the environment when defining durability. In this research, theperformance of water absorption on mechanical strength and durability of concrete containingrecycled polyethylene granules has been investigated. The replacement rate of recycledpolyethylene granules is ۵, ۱۰, ۱۵, ۲۰, ۲۵%. Recycled granules have replaced sand (FA) andaggregate (FC). By adding ۱۰% granules to replace sand and aggregate, concrete slump becamesmoother than the control sample. Also, the specific gravity of concrete has decreased comparedto the control sample. The results of concrete mechanical strength and durability of concretewith the addition of ۱۰% granule replacement granule (FC) have better results than sandreplacement (FA). The results obtained in a period of ۹۰ days show that by adding the optimalamount of aggregate (FC) granules, the compressive strength compared to the control samplehas increased by ۵.۸%. Tensile strength has increased by ۶.۷% compared to the control sample.The water absorption rate decreased by ۹.۶% compared to the control sample, the waterinfiltration rate decreased by ۱۷.۳% compared to the control sample, and the resistance rate inthe melting and frost test increased by ۸.۱%.

کلیدواژه ها:

Water Absorption ، Durability ، Mechanical Strength ، Granules ، RecycledPolyethylene