Mix proportion design and mechanical property of recycled Polyethylene terephthalate concrete

摘要

The mix proportion and mechanical property of polyethylene terephthalate (PET) concrete are studied by orthogonal test and mix proportion design. Different limestone, basalt aggregate and mineral is used to mix with melted PET to produce PET concrete. The effect of mineral materials, PET and mineral/aggregate ratio (PETWA/AG), sand ratio, PET/mineral ratio (PET/MA) and materials of coarse aggregate on PET concrete mechanical property is analyzed. The results show that the most important factor is PETWA/AG and then are sand ratio and PET/MA. Basalt is better than limestone as coarse aggregate in PET concrete. From high to low compression strength sequence of PET concrete mixed with different mineral is fly ash with 5% talc, only mixed fly ash or Portland cement (PC), mixed fly ash with 5% asphalt, without any mineral. The best mix proportion of PET concrete is PETWA/AG=1/3, sand ratio=35% and PET/fly ash=2～1.