基于熵权可拓理论的我国再生混凝土粗骨料质量等级评价
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摘要
再生混凝土粗骨料质量等级综合评价是一个涉及多项参数指标的复杂性决策问题,对此提出了基于熵权可拓理论的再生混凝土粗骨料质量等级评判模型,并依据《混凝土用可再生粗骨料标准》(GB/T 25177-2010)选取表观密度、孔隙率、坚固性等7项指标作为其质量等级评价的评判因子。首先,运用可拓学的理论知识,在引入经典域、节域、待评物元的基础上,通过物元变换构建再生混凝土粗骨料质量等级评价的物元体系,并计算各指标关联系数;然后,再结合熵权法确定物元指标体系的权重系数,建立熵权物元可拓评价模型,对再生混凝土粗骨料质量等级进行综合评价;最后,通过以某文献中5批再生粗骨料实验结果为实例对其质量等级进行评判,验证了该模型的实用性和可靠性。
The comprehensive evaluation of coarse aggregate quality grade of recycled concrete is a complex decision problem involving multiple parameter indexes.A new model of recycled coarse aggregate quality grade based on entropy weight extension theory is proposed,and according to "Renewable coarse aggregate standards for concrete"(GB/T 25177-2010),the seven indexes such as apparent density,porosity and robustness are selected as the evaluation factors of the quality grade evaluation.Firstly,based on the theoretical knowledge of extension science,on the basis of introducing the classical domain,the section domain and the material element to be evaluated,the material element system of quality evaluation of coarse aggregate of recycled concrete is established by means of matterelement transformation,and the correlation coefficient of each index is calculated.Then,the entropy weight method is used to determine the weight coefficient of the matter-element index system,and the entropy weight matter element extension evaluation model is established to evaluate the coarse aggregate quality grade of recycled concrete.Finally,the experimental results of five batches of recycled coarse aggregate from a literature were used to evaluate the quality grade,the validity and reliability of the model were verified.
The comprehensive evaluation of coarse aggregate quality grade of recycled concrete is a complex decision problem involving multiple parameter indexes.A new model of recycled coarse aggregate quality grade based on entropy weight extension theory is proposed,and according to "Renewable coarse aggregate standards for concrete"(GB/T 25177-2010),the seven indexes such as apparent density,porosity and robustness are selected as the evaluation factors of the quality grade evaluation.Firstly,based on the theoretical knowledge of extension science,on the basis of introducing the classical domain,the section domain and the material element to be evaluated,the material element system of quality evaluation of coarse aggregate of recycled concrete is established by means of matterelement transformation,and the correlation coefficient of each index is calculated.Then,the entropy weight method is used to determine the weight coefficient of the matter-element index system,and the entropy weight matter element extension evaluation model is established to evaluate the coarse aggregate quality grade of recycled concrete.Finally,the experimental results of five batches of recycled coarse aggregate from a literature were used to evaluate the quality grade,the validity and reliability of the model were verified.
引文
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[2]BS 882 Specification for aggregates from natural sources for concrete[S].London:British Standards Institution,1992.
[3]ASTM D 2940 03 Standard specification for graded aggregate material for bases or sub bases for high ways or airports[S].USA:American Society for Testing and Materials,2003.
[4]Hoon L,Ji H K,Kwan H K,et al.Application of DEM model to breakage and liberation behaviour of recycled aggregates from impact-breakage of concrete waste[J].Minerals Engineering,2008,21(11):761-765.
[5]Etxeberria M,MaríA,Barra M,et al.Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J].Cement&Concrete Research,2007,37(5):735-742.
[6]Tam V Y,Tam C M.A new approach in assessing cement mortar remains on recycled aggregate[J].Magazine of Concrete Research,2007,59(6):413-422.
[7]王思源,朱平华.再生混凝土粗骨料质量等级模糊综合评估方法[J].混凝土,2010(7):87-89.
[8]鲍学英,王起才.灰色聚类法在再生混凝土粗骨料质量等级评价中的应用[J].土木建筑与环境工程,2014,36(3):112-117.
[9]陈兆荣,雷勋.基于熵权可拓的我国能源安全评价模型[J].系统工程,2015,33(7):153-158.
[10]杨贵军,蒋朝辉.基于熵权-可拓理论的高炉软熔带位置状态模糊综合评判方法[J].自动化学报,2015,41(1):75-83.
[11]杨卓,戎晓力,卢浩,等.基于熵权物元可拓理论的隧道塌方风险评估[J].安全与环境学报,2016,16(2):15-19.
[12]梁桂兰,徐卫亚.基于熵权的可拓理论在岩体质量评价中的应用[J].岩土力学,2010,16(2):535-540.
[13]李秋义,全洪珠,秦原.混凝土再生骨料[M].北京:中国建筑工业出版社,2011.
[2]BS 882 Specification for aggregates from natural sources for concrete[S].London:British Standards Institution,1992.
[3]ASTM D 2940 03 Standard specification for graded aggregate material for bases or sub bases for high ways or airports[S].USA:American Society for Testing and Materials,2003.
[4]Hoon L,Ji H K,Kwan H K,et al.Application of DEM model to breakage and liberation behaviour of recycled aggregates from impact-breakage of concrete waste[J].Minerals Engineering,2008,21(11):761-765.
[5]Etxeberria M,MaríA,Barra M,et al.Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J].Cement&Concrete Research,2007,37(5):735-742.
[6]Tam V Y,Tam C M.A new approach in assessing cement mortar remains on recycled aggregate[J].Magazine of Concrete Research,2007,59(6):413-422.
[7]王思源,朱平华.再生混凝土粗骨料质量等级模糊综合评估方法[J].混凝土,2010(7):87-89.
[8]鲍学英,王起才.灰色聚类法在再生混凝土粗骨料质量等级评价中的应用[J].土木建筑与环境工程,2014,36(3):112-117.
[9]陈兆荣,雷勋.基于熵权可拓的我国能源安全评价模型[J].系统工程,2015,33(7):153-158.
[10]杨贵军,蒋朝辉.基于熵权-可拓理论的高炉软熔带位置状态模糊综合评判方法[J].自动化学报,2015,41(1):75-83.
[11]杨卓,戎晓力,卢浩,等.基于熵权物元可拓理论的隧道塌方风险评估[J].安全与环境学报,2016,16(2):15-19.
[12]梁桂兰,徐卫亚.基于熵权的可拓理论在岩体质量评价中的应用[J].岩土力学,2010,16(2):535-540.
[13]李秋义,全洪珠,秦原.混凝土再生骨料[M].北京:中国建筑工业出版社,2011.