Study and Application of Gneiss in Preparation of Graded Gravel Base Material

被引：1
|
作者：
Zhao, Xiaodong [1 ]
Yu, Xinjie [2 ]
Tang, Xiaoliang [2 ]
Li, Rongxu [2 ]
机构：
[1] Shijiazhuang Rd & Bridge Construct Grp, Shijiazhuang 050091, Hebei, Peoples R China
[2] Beijing Zhonglu Gaoke Highway Technol Co Ltd, Beijing 100091, Peoples R China
来源：
2020 6TH INTERNATIONAL CONFERENCE ON ENERGY MATERIALS AND ENVIRONMENT ENGINEERING | 2020年 / 508卷
关键词：
D O I：
10.1088/1755-1315/508/1/012123
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Because a lot of abandoned tunnel slag is produced in road engineering construction and the using rate is low, based on the Shijiazhuang section of the Xifu section of the Taihang mountain highway, the lithology of abandoned tunnel slag is analyzed. Its physical and mechanical properties are evaluated by laboratory tests, and its feasibility as an aggregate of graded gravel base is demonstrated. The gradation of the crushed stone mixture is composed of fine aggregate limestone mixed with abandoned tunnel gneiss, and the related characteristics are studied. The results show that the strength of the mixture could be significantly improved by replacing the fine aggregate with limestone, and the California load ratio (CBR) value of the crushed stone mixture with 0 similar to 3 mm and 3 similar to 5 mm limestone could reach 377.2%, and the unconfined compressive strength could reach 1.2 MPa.
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页数：9
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