Influence of uncoated and coated plastic waste coarse aggregates to concrete compressive strength

Abstract

Abstract. The use of plastic waste as coarse aggregates in concrete is part of efforts to reduce environmental pollution. In one hand the use of plastic as aggregates can provide lighter weight of the concrete than concrete using natural aggregates, but on the other hand bond between plastic coarse aggregates and hard matrix give low concrete compressive strength. Improvement of the bond between plastic coarse aggregate and hard matrix through a sand coating to plastic coarse aggregate whole surface is studied. Sand used to coat the plastic aggregates are Merapi volcanic sand which are taken in Magelang. Three mixtures of polypropylene (PP) coarse plastic aggregates, Cimangkok river sand as fine aggregates, water and Portland Cement Composite with a water-cement ratio of 0.28, 0.3 and 0.35 are conducted. Compression test are performed on concrete cylindrical specimens with a diameter of 10 cm and a height of 20 cm. The results in general show that concrete specimens using plastic aggregates coated with sand have higher compressive strength compared to those of concrete specimens using plastic aggregates without sand coating. The bond improvement is indirectly indicated by the betterment of concrete compressive strength.

Stress and Strain Behavior of Confined Lightweight Concrete using Sand Coated Polypropylene Coarse Aggregate

“…However, a lack of information on the characteristics of lightweight concrete containing plastic aggregates is one of the main barriers hindering acceptance of this product in the construction industry. Polypropylene coarse aggregate, as shown in Figure 1, with or without sand coating, has been studied by Purnomo et al (2017a) and Pamudji et al (2018), who found a better bond between the coarse aggregate and hard matrix in the presence of the sand coating. Polypropylene has versatile physical characteristics and is inexpensive (Maddah, 2016;Jawaid and Khan, 2018); however, knowledge of the characteristics, strength, and stress and strain behaviors of lightweight concrete with plastic aggregate is still limited.…”

Examining Polyethylene Terephthalate (PET) as Artificial Coarse Aggregates in Concrete

“…Research on low-density polyethylene LDPE plastic waste [7] and research on polyethylene plastic waste [8,9] as a substitute for fine aggregate in concrete have also been published. Other research works were on polycarbonate [10], and polypropylene (PP) wastes [11] as substitutes for coarse aggregate in concrete. Research on electronic plastic waste as a substitute for fine and coarse aggregates has also been carried out [12].…”

The Influence of River and Volcanic Sand as Coatings on Polypropylene Waste Coarse Aggregate Towards Concrete Compressive Strength

“…Some types of plastic previously used as aggregates in concrete mixtures include high density polyethylene (HDPE) [11], [12], polyethylene terephthalate (PET) [4], [9], [13]- [17], polyvinyl chloride (PVC) [18], [19], polypropylene (PP) [20], and electronic wastes (e-wastes) [21], [22].…”

“…To increase the interaction between cement paste and plastic aggregates to improve the mechanical performance of the concrete, Purnomo et al [20] coated the surface of the coarse aggregate PP developed by Pamudji el al [23] with volcanic sand, Choi et al [15] used raw materials from PET bottles waste and GBFS for making the lightweight aggregate, while Choi et al [4] used PET bottles waste and river sand powder.…”

“…This research is part of the coarse aggregate development of plastic waste conducted by Pamudji et al [23] and Purnomo et al [20] to investigate the effect of coating poplypropylene (PP) waste coarse aggregate surface with sand types on concrete performance. In Indonesia, there are two types of sand ordinarily used for making concrete and they include river sand (RS) and volcanic sand (VS).…”