Prediction Model of Compressive Strength Development in Concrete Containing Four Kinds of Gelled Materials with the Artificial Intelligence Method

Guohua Liu,Jian Zheng

doi:10.3390/app9061039

Abstract

Green concrete has been widely used in recent years because its production compliments environmental conservation. The prediction of the compressive strength of concrete using non-destructive techniques is of interest to engineers worldwide. Such methods are easy to carry out because they require little or no sample preparation. Conventional models and artificial intelligence models are two main types of models to predict the compressive strength of concrete. Artificial intelligence models main include the artificial neural network (ANN) model, back propagation (BP) neural network model, fuzzy model etc. Since both conventional models and artificial intelligence models are flawed. This study proposes to build a concrete compressive strength development over time (CCSDOT) model by using conventional method combined with the artificial intelligence method. The CCSDOT model performed well in predicting and fitting the compressive strength development in green concrete containing cement, slag, fly ash, and limestone flour. It is concluded that the CCSDOT model is stable through the use of sensitivity analysis. To evaluate the precision of this model, the prediction results of the proposed model were compared to that of the model based on the BP neural network. The results verify that the recommended model enjoys better flexibility, capability, and accuracy in predicting the compressive strength development in concrete than the other models.

Highlights

Concrete is defined as a composite mixture of cement, aggregate, water, and when necessary chemical and mineral admixtures, and it is one of the most important materials in the construction industry
It is concluded that the concrete compressive strength development over time (CCSDOT) model is stable through the use of sensitivity analysis
It is important to decide the proper number of groups for each similar mix proportion trial test

Summary

Introduction

Concrete is defined as a composite mixture of cement, aggregate, water, and when necessary chemical and mineral admixtures, and it is one of the most important materials in the construction industry. Green concrete is one kind of the various concretes which has been used widely recently. In the last few decades, chemical and mineral admixtures, such as fly ash, slag, and limestone flour, were gradually added into concrete, and such forms of concrete were used in large civil engineering and hydraulic projects. The utilization of mineral admixtures in concrete has shown a dramatic increase due to its economic, environmental, and technical benefits. Using mineral admixtures to replace partial cement is an effective way to reduce environmental pollution [5,6,7,8,9,10].

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