Abstract: For the sake of relieving the resource shortage in the construction of large-scale coastal defense projects in reef of the South China Sea, coral aggregate seawater concrete (CASC) with better regional applicability was designed. We employed the orthogonal test and the signal-to-noise ratio (SNR) based Taguchi method to explore the impact of total cementitious material content, pre water absorption rate, sand rate and net water to binder ratio on compressive strength of CASC. Then we verified the superiority of Taguchi method, confirmed and quantified the influe-nce degree of various factors on compressive strength of CASC, proposed a multivariate nonlinear regression model on compressive strength of CASC. The results show that the SNR based Taguchi method exhibited great superiority to conventional orthogonal test. The optimum design parameters of CASC turned out to be the total cementitious material content of 550 kg·m-3, pre water absorption rate of 5%, sand rate of 50%, and net water to binder ratio of 0.25. The influence degree of pre water absorption, net water to binder ratio, sand rate and total cementitious material content on CASC decreased successively. Specifically, the contribution of pre water absorption rate accounted the largest proportion (67.6%), followed by net water to binder ratio (17.8%), and sand rate (0.7%). The establishment of regression model show exceeding significance to guide the preparation of high-strength CASC.
作者简介: 巩位,2017年6月毕业于兰州理工大学,获得工程硕士学位。2017年9月至今,于南京航空航天大学攻读博士学位,主要从事混凝土耐久性的研究。 余红发,中国科学院“百人计划”入选者。担任RIELM中国分会会员,ACI中国分会理事,中国菱镁行业协会副会长,中国硅酸盐学会与中国建筑学会等学术职务。研究方向包括:盐湖镁建材、高性能混凝土、珊瑚混凝土等新型水泥混凝土材料、混凝土结构耐久性与寿命设计、混凝土材料与结构的抗冲击爆炸行为等。在ASCE Journal of Materials in Ci-vil Engineering、ACI Materials Journal、Construction and Building Material、Ocean Engineering、Materials Science and Engineering C、《硅酸盐学报》、《建筑结构学报》等国内外刊物发表学术论文300余篇,SCI/EI收录130余篇,授权中国发明专利30余项,出版学术专著2部。
引用本文:
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