[1]刘玉,周承旺,梁金龙,等.路用黏质粉土冷粘轻集料制备及强度试验研究[J].长安大学学报(自然科学版),2026,46(2):15-27.[doi:10.19721/j.cnki.1671-8879.2026.02.002]
　LIU Yu,ZHOU Cheng-wang,LIANG Jin-long,et al.Study on preparation and strength testing of road-used clayey silt cold-bonded lightweight aggregates[J].Journal of Chang’an University (Natural Science Edition),2026,46(2):15-27.[doi:10.19721/j.cnki.1671-8879.2026.02.002]
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路用黏质粉土冷粘轻集料制备及强度试验研究()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第46卷
期数:
2026年2期
页码:
15-27
栏目:
道路工程
出版日期:
2026-04-18

文章信息/Info

Title:
Study on preparation and strength testing of road-used clayey silt cold-bonded lightweight aggregates
文章编号:
1671-8879(2026)02-0015-13
作者:
刘玉1; 周承旺1; 梁金龙2; 康祖玮3; 王金刚2; 韩鑫4
(1. 长安大学 公路学院,陕西 西安 710064; 2. 中铁七局集团有限公司,河南 郑州 450016; 3. 中铁上海投资集团有限公司,上海 201101; 4. 北京金港场道工程建设有限公司,北京 100073)
Author(s):
LIU Yu1;  ZHOU Cheng-wang1;  LIANG Jin-long2;  KANG Zu-wei3;  WANG Jin-gang2;  HAN Xin4
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. China Railway Seventh Group Co., Ltd., Zhengzhou 450016, Henan, China; 3. China Railway(Shanghai)Investment Group Co., Ltd.,Shanghai 201101, China; 4. Beijing Jingang Airport Road Construction Co., Ltd., Beijing 100073, China)
关键词:
道路工程;  冷粘轻集料;  室内试验;  黏质粉土;  筒压强度
Keywords:
road engineering;  cold-bonded lightweight aggregates;  indoor testing;  clayey silt;  cylinder strength
分类号:
U414
DOI:
10.19721/j.cnki.1671-8879.2026.02.002
文献标志码:
A
摘要:
为了缓解工程建设对传统矿质集料的依赖性,推动公路工程可持续发展,基于粉体造粒技术,依托郑州某工程项目,提出一种低碳、高效的人造集料制备方法。该方法以黏质粉土为主要原材料,分别采用普通硅酸盐水泥(OPC)、快硬硫铝酸盐水泥(RAC)、矿渣硅酸盐水泥(GSC)作为冷粘剂,制备普通硅酸盐水泥轻集料(OPCLA)、快硬硫铝酸盐水泥轻集料(RACLA)和矿渣水泥轻集料(GSCLA)。基于室内试验探索粉土RACLA的最佳工艺参数,建立冷粘剂类型、掺量、养护龄期与轻集料物理和力学性能之间的影响。研究结果表明:通过控制最佳造粒工艺参数(含水率为15%,转速为30 r/min,倒料速度为0.6 kg/s),可得到成粒率为91.3%、颗粒饱满且成型均匀的轻集料; RACLA在养护龄期小于3 d时强度增长速度最快,适用于工期紧张的项目; OPCLA在养护龄期大于28 d时,单颗粒强度可达到3.55 MPa,筒压强度为6.96 MPa,表现出较高的后期强度水平; GSCLA以GGBS替换30%(质量分数)OPC,强度虽有所下降,但成本大幅降低,经济性更为突出; 轻集料单颗粒强度与筒压强度之间可用线性关系式进行表征; 综合性能评价显示,养护龄期大于3 d时冷粘轻集料在施工与服役阶段均能满足路基和基层的性能要求; 提出的人造轻集料制备方法可为道路工程中路基与基层材料的应用提供技术支撑。
Abstract:
To reduce the reliance of engineering construction on traditional mineral aggregates and promote the sustainable development of highway engineering, a low-carbon and efficient artificial aggregate preparation method based on powder granulation technology was proposed based on an engineering project in Zhengzhou. Clayey silty soil was used as the main raw material, and ordinary Portland cement(OPC), rapid-hardening aluminate cement(RAC), and slag cement composed of ground granulated blast-furnace slag mixed with ordinary Portland cement(GSC)were adopted as cold binders to prepare ordinary Portland cement lightweight aggregates(OPCLA), rapid-hardening aluminate cement lightweight aggregates(RACLA), and slag cement lightweight aggregates(GSCLA), respectively. Based on laboratory experiments, the optimal process parameters for the preparation of cold-bonded lightweight aggregates from silty soil were investigated, and the influences of cold binder type, binder content, and curing age on the physical and mechanical properties of the lightweight aggregates were established. The results show that, by controlling the optimal granulation process parameters, including a moisture content of 15%, a rotational speed of 30 r/min, and a feeding rate of 0.6 kg/s, lightweight aggregates with a granulation rate of 91.3%, uniform, and well-formed particles are obtained. RACLA exhibits the fastest strength development within the first 3 days of curing and is suitable for projects with tight construction schedules. After 28 days of curing, the single-particle strength and crushing strength of OPCLA reach 3.55 and 6.96 MPa, respectively, indicating a high level of later-age strength. When 30% of OPC is replaced by ground granulated blast-furnace slag in GSCLA, the strength decreases to a certain extent, whereas the cost significantly reduces, resulting in superior economic performance. The fitting results show that the single-particle strength of lightweight aggregates can be represented by a linear relationship with the crushing strength. Comprehensive performance evaluation shows that the cold-bonded lightweight aggregates after 3 days of curing can meet the performance requirements of subgrade and base layers during both construction and service stages. The artificial lightweight aggregates preparation method proposed in this study can provide technical support for the application of subgrade and base materials in road engineering.4 tabs, 11 figs, 36 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-08-01
基金项目:国家自然科学基金项目(52478436); 陕西省自然科学基础研究计划项目(2020JM-249); 陕西省教育厅服务地方专项计划项目(24JE007)
作者简介:刘 玉(1979-),男,河南周口人,教授,工学博士,从事路用冷粘轻集料的材料开发与技术研究,E-mail:yul@chd.edu.cn。
更新日期/Last Update: 2026-04-20