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山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (1): 11-17.doi: 10.6040/j.issn.1672-3961.0.2022.114

• • 上一篇    

强化方式与材料对再生粗集料的性能规律分析

赵之仲1,柳泓哲2*,唐亮3,杨振宇4,王日升1   

  1. 1.山东交通学院交通土建工程学院, 山东 济南 250357;2.北京建筑大学交通与土木工程学院, 北京 102616;3.山东省路桥集团有限公司, 山东 济南 250014;4.山东高速股份有限公司, 山东 济南 250014
  • 发布日期:2023-02-13
  • 作者简介:赵之仲(1978— ),男,山东德州人,副教授,硕士生导师,主要研究方向为路面结构与材料. E-mail:zhaozhizhong@sdjtu.edu.cn*通信作者简介:柳泓哲(1994— ),男,山东济南人,博士研究生,主要研究方向为路面结构与材料. E-mail: 1108140620004@stu.bucea.edu.cn
  • 基金资助:
    “十三五”国家重点研发计划(2018YFB1600100);山东省交通运输厅科技计划(2018B02-01、2019B63、2020B93);山东省自然科学基金资助项目(ZR2020QE274);山东省重点研发计划(软科学项目)(2020RKB01602)

Analysis on the performance law of brick-concrete recycled coarse aggregate by strengthening methods and materials

ZHAO Zhizhong1, LIU Hongzhe2*, TANG Liang3, YANG Zhenyu4, WANG Risheng1   

  1. 1. School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, Shandong, China;
    2. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China;
    3. Shandong Luqiao Group Co., Ltd., Jinan 250014, Shandong, China;
    4. Shandong Hi-speed Company Limited, Jinan 250014, Shandong, China
  • Published:2023-02-13

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摘要： 为解决砖混再生粗集料(brick-concrete recycled coarse aggregate, BCRCA)性能不足问题,采用自主研发的负压强化设备研究强化工艺参数。基于X射线衍射分析技术分析钛石膏-矿渣(titanium gypsum-slag slurry, T-S)浆体的强化作用机理,提出灌入饱和度评价指标。将强化后BCRCA用于水泥稳定碎石中,研究其强度变化规律。试验结果发现:选择负压压力为-75 kPa、负压温度为70 ℃、负压时间为14 min作为负压强化最优工艺参数;经过T-S浆体负压强化后,BCRCA的压碎值和吸水率分别降低到27.3%和6.8%,与水泥浆浸泡的BCRCA相比,压碎值和吸水率分别降低了6.83%和23.59%,表观密度从2.615 g/cm3提高至2.678 g/cm3,开口孔隙的灌入饱和度从22.5%提升至35.1%;将强化骨料用于水泥稳定碎石时,无侧限抗压强度和劈裂强度较浸泡强化时提高了40.7%、22.9%。负压强化方式下T-S浆体可以有效强化砖混再生粗集料。

关键词: 砖混再生粗骨料, 负压强化, 工艺参数, 评价指标, 力学性能

中图分类号: 

  • TU458
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