[1]栗威,韦慧,王兆仑,等.城市建筑废弃物再生水泥稳定混合料路用性能[J].长安大学学报(自然科学版),2019,39(04):52-61.
　LI Wei,WEI Hui,WANG ZHAO lun,et al.Pavement performance of a regenerated cement stabilized mixture on construction waste[J].Journal of Chang’an University (Natural Science Edition),2019,39(04):52-61.
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城市建筑废弃物再生水泥稳定混合料路用性能()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第39卷
期数:
2019年04期
页码:
52-61
栏目:
道路工程
出版日期:
2019-07-15

文章信息/Info

Title:
Pavement performance of a regenerated cement stabilized mixture on construction waste
作者:
栗威; 韦慧; 王兆仑; 李玉梅; 冯学茂
（1. 河南省交通科学技术研究院有限公司，河南 郑州 450006; 2. 长沙理工大学〓公路养护技术国家工程实验室，湖南 长沙 410076; 3. 广西新恒通高速公路有限公司，广西 南宁 530029）
Author(s):
LI Wei1; 2;  WEI Hui2;  WANG ZHAOlun2;  LI Yumei1;  FENG Xuemao3
(1.Henan Transportation Research Institute CO., LTD, Zhengzhou 450006, Henan, China; 2. State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410076, Hunan, China; 3. Guangxi Xinhengtong Expressway CO., LTD, Nanning 530029, Guangxi, China）
关键词:
道路工程; 建筑废弃物; 再生集料; 水泥稳定混合料; 路用性能
Keywords:
road engineering;  construction waste;  regenerated aggregate;  cement stabilized mixture;  pavement performance
文献标志码:
A
摘要:
为探究建筑废弃物再生集料应用于道路基层的适用性和可行性，通过对再生原材料基本力学性能分析，建立优化混合料配合比设计方法，确定再生集料粒径类型、与天然集料混合比例及水泥胶结料用量等，研究再生集料掺量（质量分数为10%、18%、28%，下同）、养护龄期（7~90 d）等因素对再生混合料力学强度性能、力学刚度、抗冻性能、抗冲刷性能及收缩性能的影响。研究结果表明：再生集料的力学强度低于天然集料，吸水率达到10%，在掺量28%时，选用5~10 mm粒径组成的再生集料混合料力学强度值高于10~20 mm粒径的再生集料，试验结果的离散性也显著下降；随再生集料掺量的增加，再生混合料的路用性能指标均出现劣化现象，其中对劈裂强度的劣化幅度最大，抗压回弹模量影响次之，而抗压强度的影响最小；在掺量［10%,18%］范围内，冻融强度损失的下降幅度较大，而冲刷质量损失在掺量（18%,28%］时的下降幅度较大；随养护龄期的增加，再生集料掺量越高，其力学强度改善效果也更明显，能够显著弥补早期强度不足；随环境温度的提高，再生混合料的温缩系数也显著增加，且进一步提高了再生集料掺量变化对温缩系数的敏感性；与天然集料相比，城市建筑废弃物再生集料的基本性能指标有所减低，但通过合理的加工处理，仍能满足部分等级道路基层施工的相关规范要求，建议在使用过程中加强原材料指标控制。
Abstract:
To analyze the feasibility and applicability of construction waste recycling aggregate on a road base, an optimal design method for a mixture ratio was established. The recycled aggregate size type and the mixing ratio of natural aggregate and cement were determined. The influences of such factors as recycled aggregate proportion (mass fraction, 10, 18, and 28%, the same below) and curing age (7~90 d) on mechanical strength performance and the mechanical stiffness, frost resistance, erosion resistance, and shrinkage performance of the recycled mixture were studied. The results show that the mechanical strength of the recycled aggregate is lower than that of natural aggregate and the water absorption rate reaches 10%, and when the mixing amount reaches 28%, the mechanical strength of the mixture composed of the 5 to 10 mm recycled aggregate, is higher than that of the 10 to 20 mm recycled aggregate, and the dispersion of the test results also significantly decreases. With an increase in the regenerated aggregate dosage, the pavement performance indicators of the regenerated aggregate are all deteriorated, among which, the degradation amplitude of splitting strength is the largest, followed by the compressive resilient modulus, the effect of compressive strength is the smallest. Within the range of 10% to 18% of the mixing amount, the loss of freezethaw strength significantly decreases while the loss of washing quality significantly decreased within the range of 18% to 28%. With the increase in curing age, the higher the proportion of recycled aggregate, the more obvious the improvement effect of the mechanical strength, which can compensated for the lack of early strength. With an increase in ambient temperature, the temperature contraction coefficient of the regenerated mixture significantly increases and the sensitivity of the regenerated aggregate dosage to the temperature contraction coefficient is further improved. Compared to natural aggregate, the basic performance indexes of urban construction waste recycling aggregate are reduced. However, it can still meet the standard requirements in part of the grade road base via reasonable processing and it is suggested to strengthen the control of the raw material index during application. 5 tabs, 13 figs, 25 refs.

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更新日期/Last Update: 2019-07-29