玄武岩纤维增强再生混凝土正交试验与强度预测  

Orthogonal test and strength prediction of basalt fiber reinforced recycled concrete

作　　者：皇民 赵玉如 苑俊杰 毕洁同 王松 HUANG Min;ZHAO Yuru;YUAN Junjie;BI Jietong;WANG Song(College of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院土木工程学院

出　　处：《河南工程学院学报（自然科学版）》2019年第4期22-27,共6页Journal of Henan University of Engineering：Natural Science Edition

基　　金：河南省科技攻关计划(162102310403);河南省教育厅自然科学研究重点项目(12A560004);郑州市科技发展计划项目(20130816);河南工程学院博士基金项目(D2012008)

摘　　要：对影响玄武岩纤维增强再生混凝土(BFRRC)强度的水胶比、再生粗骨料替代率、玄武岩纤维掺量和玄武岩纤维长度4因素进行了四因素三水平正交试验设计,研究了4种因素对BFRRC强度的影响规律,利用卷积神经网络对BFRRC的强度发展进行了预测研究。结果表明:水胶比越低,相应的混凝土强度越高;随着再生粗骨料替代率的增加,再生混凝土抗压与抗折强度先降低后提高;掺入玄武岩纤维后,再生混凝土的抗折强度明显提高,而抗压强度则随纤维掺量的增加先提高后降低;综合BFRRC强度的影响因素与再生骨料的循环经济要求,确定其最优配比为A 1B 3C 3D 3;建立了卷积神经网络BFRRC强度预测模型,预测结果与实测值十分接近,可以作为BFRRC配合比设计的参考。The orthogonal test design of four factors and three levels were carried out to study the influence of four factors on the strength of BFRRC,such as water-binder ratio,replacement rate of recycled coarse aggregate,basalt fiber content and basalt fiber length.The influence of four factors on the strength of BFRRC was studied.The strength of BFRRC was determined by using convolution neural network theory.The test results show that the lower the water-binder ratio is,the higher the strength of concrete will be;with the increase of the replacement ratio of recycled coarse aggregate,the compressive and flexural strength of recycled concrete decreases first and then increases;with the addition of basalt fiber,the flexural strength of recycled concrete increases significantly,while the compressive strength increases first and then decreases with the increase of the content of fibers.Combining the strength influencing factors of BFRRC with the recycling economy requirements of recycled aggregate,the optimum ratio of BFRRC to recycled aggregate is determined as A 1B 3C 3D 3.The BFRRC strength prediction model based on convolution neural network is established.The prediction results are very close to the measured values,which can be used as a reference for BFRRC mixture design.

关 键 词：玄武岩纤维 再生混凝土 正交试验 强度预测 卷积神经网络 

分 类 号：TU528.572[建筑科学—建筑技术科学]