Open Access

ARTICLE

Experimental Research on the Physical and Mechanical Properties of Concrete with Recycled Plastic Aggregates

Haikuan Wu^1,2, Changwu Liu^1,2,*, Song Shi^1,2, Kangliang Chen^1,2

1 State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
2 College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China

* Corresponding Author: Changwu Liu. Email:

(This article belongs to the Special Issue: Renewable materials for sustainable development)

Journal of Renewable Materials 2020, 8(7), 727-738. https://doi.org/10.32604/jrm.2020.09589

Received 03 January 2020; Accepted 06 March 2020; Issue published 01 June 2020

Abstract

In order to study the effect of recycled plastic particles on the physical and mechanical properties of concrete, recycled plastic concrete with 0, 3%, 5% and 7% content (by weight) was designed. The compressive strength, splitting tensile strength and the change of mass caused by water absorption during curing were measured. The results show that the strength of concrete is increased by adding recycled plastic into concrete. Among them, the compressive strength and the splitting tensile strength of concrete is the best when the plastic content is 5%. With the increase of plastic content, the development speed of early strength slows down. Silane coupling agent plays a positive role in the strength of recycled plastic concrete. The water absorption saturation of concrete has been basically completed in the early stage. The addition of silane coupling agent makes the porosity of concrete reduce and the water absorption of concrete become poor. By summing up the physical and mechanical properties of recycled plastic concrete, it could be found that the addition of recycled plastic was effective for the modification of concrete materials. Under the control of the amount of recycled plastic, the strength of concrete with recycled plastic aggregates can meet the engineering requirements.

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