Predicting the Compressive Strength of Rubberized Concrete Using Artificial Intelligence Methods

Amedeo Gregori,Giri Venkiteela,Chiara Castoro

doi:10.3390/su13147729

Amedeo Gregori, Giri Venkiteela + Show 1 more

Open Access

https://doi.org/10.3390/su13147729

Copy DOI

Abstract

In this study, support vector machine (SVM) and Gaussian process regression (GPR) models were employed to analyse different rubbercrete compressive strength data collected from the literature. The compressive strength data at 28 days ranged from 4 to 65 MPa in reference to rubbercrete mixtures, where the fine aggregates (sand fraction) were substituted with rubber aggregates in a range from 0% to 100% of the volume. It was observed that the GPR model yielded good results compared to the SVM model in rubbercrete strength prediction. Two strength reduction factor (SRF) equations were developed based on the GPR model results. These SRF equations can be used to estimate the compressive strength reduction in rubbercrete mixtures; the equations are provided. A sensitivity analysis was also performed to evaluate the influence of the w/c ratio on the compressive strength of the rubbercrete mixtures.

Highlights

IntroductionMore than 500 million units of waste tyres are discarded every year without any treatment [1] and their increasing number has raised concerns worldwide due to the threat they pose directly and indirectly to human health and the environment
Waste tyre disposal represents a growing environmental problem, not to be overlooked.Globally, more than 500 million units of waste tyres are discarded every year without any treatment [1] and their increasing number has raised concerns worldwide due to the threat they pose directly and indirectly to human health and the environment
The main purpose of this study is to develop a simple model that can predict the compressive strength reduction of concrete containing crumb rubber as a partial replacement for fine aggregates

Summary

Introduction

More than 500 million units of waste tyres are discarded every year without any treatment [1] and their increasing number has raised concerns worldwide due to the threat they pose directly and indirectly to human health and the environment. For this reason, recycling of waste tyres has been implemented in many countries. This crumb rubber can be added into concrete mixture as partial replacement of the natural aggregates [2], modifying the concrete properties [3,4,5,6,7,8,9,10,11]

Objectives

Results

Conclusion