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再生混凝土粗骨料的质量分级优选评价

李福海 靳贺松 余泳江 胡志明 王奕彬

李福海, 靳贺松, 余泳江, 胡志明, 王奕彬. 再生混凝土粗骨料的质量分级优选评价[J]. 西南交通大学学报, 2019, 54(4): 793-800, 815. doi: 10.3969/j.issn.0258-2724.20170786
引用本文: 李福海, 靳贺松, 余泳江, 胡志明, 王奕彬. 再生混凝土粗骨料的质量分级优选评价[J]. 西南交通大学学报, 2019, 54(4): 793-800, 815. doi: 10.3969/j.issn.0258-2724.20170786
LI Fuhai, JIN Hesong, YU Yongjiang, HU Zhiming, WANG Yibin. Optimization Evaluation of Quality Classification of Concrete with Recycled Coarse Aggregate[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 793-800, 815. doi: 10.3969/j.issn.0258-2724.20170786
Citation: LI Fuhai, JIN Hesong, YU Yongjiang, HU Zhiming, WANG Yibin. Optimization Evaluation of Quality Classification of Concrete with Recycled Coarse Aggregate[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 793-800, 815. doi: 10.3969/j.issn.0258-2724.20170786

再生混凝土粗骨料的质量分级优选评价

doi: 10.3969/j.issn.0258-2724.20170786
基金项目: 国家自然科学基金资助项目(51308471);国家重点研发计划(2016YFB0303603-4);中央高校基本科研业务费专项资金资助(2682015ZD13)
详细信息
    作者简介:

    李福海(1979—),男,高级工程师,博士,研究方向为混凝土结构及材料,E-mail:lifuhai2007@home.swjtu.edu.cn

  • 中图分类号: TU528

Optimization Evaluation of Quality Classification of Concrete with Recycled Coarse Aggregate

  • 摘要: 为了克服再生骨料比选中主观、随意性等因素带来的误差,并确保对其质量作出科学合理选择,基于组合权重-可拓学理论,建立了混凝土再生粗骨料质量评价模型,根据《混凝土用再生骨料标准》确定评价指标体系和分类等级界限,利用层次分析法和熵权理论确定各指标的主、客观权重;依据可拓学理论求解不同等级下各个指标的样本关联度,然后结合组合权重法计算样本在不同等级下的关联函数值;按照数值越大越优原则进行质量等级评价,最后结合实例检验了评价方法的科学合理性. 研究结果表明:组合权重-可拓学理论综合评价法既能遵循规范单一因素法的评估步骤,还可以详细排序比较各项指标不同等级下的结果;通过实例计算出5组样本的质量等级分别为Ⅱ级、Ⅰ级、Ⅰ级、Ⅱ级、Ⅰ级,这与前人模糊理论评估结果一致;3种权重方法不仅计算出7项再生粗骨料性能指标的具体权重值,而且也能体现出各指标的相对重要性. 通过对再生骨料的质量优选研究,可以为再生混凝土的工程应用提供理论参考.

     

  • 图 1  质量评价层次结构分布

    Figure 1.  evaluation quality Hierarchical structure of quality evaluation

    图 2  混凝土再生粗骨料质量综合评价流程

    Figure 2.  Comprehensive evaluation process of quality of concrete with recycled coarse aggregate

    表  1  层次分析法矩阵判断标度赋值

    Table  1.   Scales assignment of matrix in AHP

    标度赋值含义(重要性比较)
    1XiXj 两元素具有同样重要性
    3XiXj 两元素相比,Xi 稍重要
    5XiXj 两元素相比,Xi 明显重要
    7XiXj 两元素相比,Xi 极其重要
    9XiXj 两元素相比,Xi 强烈重要
    2、4、6、8表示上述相邻判断标度赋值的中间值
     说明:XjXi 两元素相比时,标度取值为上述数值的倒数.
    下载: 导出CSV

    表  2  判断矩阵构造因素

    Table  2.   Structural factor of judgment matrix

    元素X1X2···Xj···Xn
    X1a11a12···a1j···a1n
    X2a21a22···a2j···a2n
    $\vdots$$\vdots$$\vdots$$\vdots$$\vdots$
    Xiai1ai2···aij···ain
    $\vdots$$\vdots$$\vdots$$\vdots$$\vdots$
    Xnan1an2···anj···ann
    下载: 导出CSV

    表  3  判断矩阵的lRI数值汇总

    Table  3.   lRI of judment matrix

    nlRInlRI
    1061.24
    2071.32
    30.5881.41
    40.9091.45
    51.12101.40
    下载: 导出CSV

    表  4  混凝土再生粗骨料质量分级与评价指标

    Table  4.   Quality classification and evalution indexes of concrete with recycled coarse aggregate

    指标Ⅰ(优质)Ⅱ(良好)Ⅲ(合格)Ⅳ(不合格)
    C1/(kg•m–3> 2 450(2 350,2 450](2 250,2 350]≤2 250
    C2/%< 47[47,50)[50,53)≥53
    C3/%< 12[12,20)[20,30)≥30
    C4/%< 5.0[5.0,9.0)[9.0,15.0)≥15.0
    C5/%< 0.5[0.5,0.7)[0.7,1.0)≥1.0
    C6/%< 1.0[1.0,2.0)[2.0,3.0)≥3.0
    C7/%< 3.0[3.0,5.0)[5.0,7.0)≥7.0
    下载: 导出CSV

    表  5  混凝土再生粗骨料质量等级与适用范围

    Table  5.   Quality grades and scope of application of concrete with recycled coarse aggregate

    质量等级作用环境等级工程种类
    Ⅰ级A-F 级构筑物与非构筑物、建筑结构物与非结构物、预应力混凝土与路面
    Ⅱ级A-C 级构筑物与非构筑物、建筑结构物与非结构物、预应力混凝土与路面
    Ⅲ级A-B 级路基、路堤与绝缘障碍物
    Ⅳ级A-B 级路堤与绝缘障碍物
    下载: 导出CSV

    表  6  样本实测值

    Table  6.   Actual measurement datas of the samples

    样本C1/(kg•m–3)C2/%C3/%C4/%C5/%C6/%C7/%
    S12 6205316.01.00.93.402.5
    S22500509.89.20.52.4010.2
    S32 4354423.11.41.00.184.9
    S42 3604631.63.10.40.435.8
    S52 3005317.512.00.71.409.0
    下载: 导出CSV

    表  7  修正补充后的再生粗骨料质量分级汇总

    Table  7.   Quality grades of concrete with recycled coarse aggregate after corrected

    指标Ⅰ级Ⅱ级Ⅲ级Ⅳ级
    (优质)(良好)(合格)(不合格)
    C1/
    (kg•m–3)
    (2 450,
    2 650]
    (2 350,
    2 450]
    (2 250,
    2 350]
    [2 150,
    2 250]
    C2/%[44,47)[47,50)[50,53)[53,56]
    C3/%[0,12)[12,20)[20,30)[30,40]
    C4/%[0,5)[5,9)[9,15)[15,20]
    C5/%[0,0.5)[0.5,0.7)[0.7,1.0)[1.0,1.5]
    C6/%[0,1.0)[1.0,2.0)[2.0,3.0)[3.0,4.0]
    C7/%[0,3.0)[3.0,5.0)[5.0,7.0)[7.0,11.0]
    下载: 导出CSV

    表  8  关联函数计算结果

    Table  8.   Calculation results of associative function

    样本等级关联值
    C1C2C3C4C5C6C7
    S1Ⅰ级0.30–0.6670.200.400.400.80–0.25
    Ⅱ级0.850.5–0.3330.800.250.700.167
    Ⅲ级0.9000.200.889–0.200.400.39
    Ⅳ级0.92100.4670.9330.143–2.00.643
    S2Ⅰ级0.500.333–0.2890.31300.4670.90
    Ⅱ级0.2500.1830.02100.200.867
    Ⅲ级0.5000.51–0.0220.286–0.333–0.80
    Ⅳ级0.6250.3330.6730.3870.500.200.40
    S3Ⅰ级0.06500.3960.560.50.360.279
    Ⅱ级0.0751.00.1550.720.3750.82–0.021
    Ⅲ级0.2831.0–0.2250.8440.6670.910.02
    Ⅳ级0.46251.00.290.90700.1430.30
    S4Ⅰ级0.30–1.00.70–1.5830.3330.830.35
    Ⅱ级–0.050.333–0.050.380.200.570.133
    Ⅲ级0.0450.6670.160.6560.4290.785–0.182
    Ⅳ级0.3440.778–0.2350.7930.600.8570.1875
    S5Ⅰ级0.500.6670.2390.4670.2220.2220.75
    Ⅱ级0.250.50–0.1670.27300.400.667
    Ⅲ级–0.5000.125–0.6000.300.50
    0.2500.4170.2730.300.5331.0
    下载: 导出CSV

    表  9  再生粗骨料的各类权重计算结果

    Table  9.   Calculation results of various weights of concrete with recycled coarse aggregate

    权重类型权重
    C1C2C3C4C5C6C7
    主观0.1130.0740.2710.3420.0390.0530.108
    客观0.1230.1720.0960.2190.1370.1230.131
    组合0.1200.1420.1490.1990.1650.1020.125
    下载: 导出CSV

    表  10  待评再生粗骨料在各等级下的综合关联度及综合评价结果

    Table  10.   Correlation degree and the comprehensive evaluation results of the RCA and the quality grades

    样本综合关联度最大关联值评定等级
    Ⅰ级Ⅱ级Ⅲ级Ⅳ级
    S10.167 00.416 10.371 30.265 70.416 1Ⅱ级
    S20.386 70.190 20.044 80.352 50.386 7Ⅰ级
    S30.432 40.420 30.415 80.423 30.432 4Ⅰ级
    S4– 0.133 40.417 20.382 60.384 40.417 2Ⅱ级
    S50.436 30.254 6– 0.067 70.375 30.436 3Ⅰ级
    下载: 导出CSV
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  • 收稿日期:  2017-11-17
  • 修回日期:  2018-06-20
  • 网络出版日期:  2019-06-14
  • 刊出日期:  2019-08-01

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