| 引用本文: | 徐松,王叶飞,殷杰,袁燕,方雷,贾晓娟.水泥稳定冷再生混合料材料组成设计与强度特性研究[J].材料科学与工艺,2025,33(3):29-37.DOI:10.11951/j.issn.1005-0299.20230283. |
| XU Song,WANG Yefei,YIN Jie,YUAN Yan,FANG Lei,JIA Xiaojuan.Study on composition design and strength characteristics of cement-stabilized cold recycled mixture materials[J].Materials Science and Technology,2025,33(3):29-37.DOI:10.11951/j.issn.1005-0299.20230283. |
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| 摘要: |
| 为了研究多种因素对水泥稳定冷再生混合料路用性能的影响,并揭示其微观机理,本文控制了如新集料替换比例、成型方式、压实功和废旧沥青混合料含量等关键参数,并对水泥稳定冷再生混合料的无侧限抗压强度和劈裂强度进行了深入的分析。通过扫描电镜技术对水泥-水稳层集料的界面过渡区进行了微观观察,并探讨了水泥稳定冷再生混合料的强度形成机理。结果表明,新集料的强化效果随水泥掺量的增加而显现,高掺量的新集料能显著提升试件后期的强度。振动成型或增加压实功能提升混合料的密实度和抗力性能。此外,微观观察揭示,水泥-新集料界面主要为致密网状硅酸钙,其粘结力良好,而水泥-旧集料界面则呈疏松结构,其疏松多孔的水化物是抑制混合料性能的主要因素。 |
| 关键词: 道路工程 水泥稳定冷再生混合料 劈裂强度 抗压强度 微观形貌 强度特性 |
| DOI：10.11951/j.issn.1005-0299.20230283 |
| 分类号:U414 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(52278446). |
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| Study on composition design and strength characteristics of cement-stabilized cold recycled mixture materials |
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XU Song1, WANG Yefei2, YIN Jie1, YUAN Yan1, FANG Lei1, JIA Xiaojuan3
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(1.College of Civil Engineering, Fuzhou University, Fuzhou 350108, China; 2.School of Civil Engineering & Transportation, South China University of Technology, Guangzhou 510640, China; 3. Fujian Provincial Key Laboratory of Highway Engineering, Fuzhou 350108, China)
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| Abstract: |
| In order to study the influence of various factors on the road performance of cement-stabilized cold recycled mixtures and to reveal their micro-mechanisms, this paper controlled key parameters such as the proportion of new aggregate replacement, molding method, compaction work and content of waste asphalt mixtures, and conducted an in-depth analysis of the unconfined compressive strength and splitting strength of cement-stabilized cold recycled mixtures. By scanning electron microscope technique, the authors carried out microscopic observation on the interfacial transition zone of cement-water-stabilized layer aggregates and explored the strength formation mechanism of cement-stabilized cold recycled mixtures. The results show that the strengthening effect of the new aggregate becomes evident with the increase of cement dosage. Higher dosage of the new aggregate can significantly enhance the strength of the specimen in the later stage. Vibration molding or the addition of compaction function enhance the densification and resistance properties of the mixtures. In addition, microscopic observation reveals that the cement-new aggregate interface primarily consists of dense reticulated calcium silicate with good bonding strength. On the other hand , the cement-old aggregate interface exhibits a loose structure, with the porous hydration products being the main factor inhibiting the performance of the mixture. |
| Key words: road engineering cement-stabilized cold recycled mixture splitting strength compressive strength micro-mechanism strength characteristics |
