Compressive strength prediction and optimization design of sustainable concrete based on squirrel search algorithm-extreme gradient boosting technique  

作　　者：Enming LI Ning ZHANG Bin XI Jian ZHOU Xiaofeng GAO 

机构地区：[1]ETSI Minas y Energía,Universidad Politécnica de Madrid,Madrid 28003,Spain [2]Leibniz Institute of Ecological Urban and Regional Development(IOER),Dresden 01217,Germany [3]Department of Civil and Environmental Engineering,Politecnico Di Milano,Milano 20133,Italy [4]School of Resources and Safety Engineering,Central South University,Changsha 410083,China [5]Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment(Ministry of Education),College of Environment and Ecology,Chongqing University,Chongqing 400045,China

出　　处：《Frontiers of Structural and Civil Engineering》2023年第9期1310-1325,共16页结构与土木工程前沿（英文版）

基　　金：funding provided by the China Scholarship Council (Nos.202008440524 and 202006370006);supported by the Distinguished Youth Science Foundation of Hunan Province of China (No.2022JJ10073);Innovation Driven Project of Central South University (No.2020CX040);Shenzhen Sciencee and Technology Plan (No.JCYJ20190808123013260).

摘　　要：Concrete is the most commonly used construction material.However,its production leads to high carbon dioxide(CO_(2))emissions and energy consumption.Therefore,developing waste-substitutable concrete components is necessary.Improving the sustainability and greenness of concrete is the focus of this research.In this regard,899 data points were collected from existing studies where cement,slag,fly ash,superplasticizer,coarse aggregate,and fine aggregate were considered potential influential factors.The complex relationship between influential factors and concrete compressive strength makes the prediction and estimation of compressive strength difficult.Instead of the traditional compressive strength test,this study combines five novel metaheuristic algorithms with extreme gradient boosting(XGB)to predict the compressive strength of green concrete based on fly ash and blast furnace slag.The intelligent prediction models were assessed using the root mean square error(RMSE),coefficient of determination(R^(2)),mean absolute error(MAE),and variance accounted for(VAF).The results indicated that the squirrel search algorithm-extreme gradient boosting(SSA-XGB)yielded the best overall prediction performance with R^(2) values of 0.9930 and 0.9576,VAF values of 99.30 and 95.79,MAE values of 0.52 and 2.50,RMSE of 1.34 and 3.31 for the training and testing sets,respectively.The remaining five prediction methods yield promising results.Therefore,the developed hybrid XGB model can be introduced as an accurate and fast technique for the performance prediction of green concrete.Finally,the developed SSA-XGB considered the effects of all the input factors on the compressive strength.The ability of the model to predict the performance of concrete with unknown proportions can play a significant role in accelerating the development and application of sustainable concrete and furthering a sustainable economy.

关 键 词：sustainable concrete fly ash slay extreme gradient boosting technique squirrel search algorithm parametric analysis 

分 类 号：TU528[建筑科学—建筑技术科学]