Open Access

ARTICLE

Recycled Aggregate Pervious Concrete: Analysis of Influence of Water-Cement Ratio and Fly Ash under Single Action and Optimal Design of Mix Proportion

by Shoukai Chen^1,4,5, Chunpeng Xing¹, Mengdie Zhao^2,*, Junfeng Zhang³, Lunyan Wang^1,4,5,*, Qidong He⁶

1 School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
2 College of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
3 College of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
4 Key Laboratory of Water Environment Simulation and Treatment of Henan Province, Zhengzhou, 450002, China
5 Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Zhengzhou, 450045, China
6 Water Conservancy and Electric Power Building Survey, Design and Research Institute of Chongqing, Chongqing, 401120, China

* Corresponding Authors: Mengdie Zhao. Email: ; Lunyan Wang. Email:

(This article belongs to the Special Issue: Recycled Concrete Towards a Sustainable Society)

Journal of Renewable Materials 2022, 10(3), 799-819. https://doi.org/10.32604/jrm.2022.017285

Received 28 April 2021; Accepted 09 July 2021; Issue published 28 September 2021

Abstract

Pervious concrete is recommended, which is of great benefit to the ecological environment and human living environment. In this paper, the influences of five water-cement ratios and four fly ash contents to replace the cement by mass with a water-cement ratio of 0.30 on the properties of Recycled Aggregate Pervious Concrete (RAPC) were studied. Following this, based on the Grey relational-Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) optimization method, the strength, permeability, abrasion loss rate, and material costs of RAPC were adopted as evaluation indices to establish a mix proportion optimization model. The results show that the increase of water-cement ratio and fly ash replacement level of RAPC leads to decreased compressive strength while an increase in the permeability and abrasion loss rate. According to test results based on the optimal model 0.30 was identified as the best mix proportion. In addition, ecological-economic analysis of RAPC raw materials was carried out by comparing different natural aggregates. The results of EE (embodied energy) and ECO_2e (embodied CO₂ emission) pointed out that the combination of recycled aggregate and fly ash leads to significant ecological and economic benefits.

---

Keywords

---