中文核心期刊
CSCD来源期刊
中国科技核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2014, Vol. 33 ›› Issue (5): 61-64.DOI: 10.3969/j.issn.1674-0696.2014.05.13

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硬质砂岩级配碎石应用研究

刘唐志1，黄犀纯2，张建卫2，李俊杰1   

  1. 1.重庆交通大学 土木建筑学院，重庆 400074；2.路桥建设重庆公司，重庆 400020
  • 收稿日期:2013-05-01 修回日期:2013-10-11 出版日期:2014-10-15 发布日期:2015-03-10
  • 作者简介:刘唐志（1976—），男，江西泰和人，副教授，博士，主要从事道路工程方面的研究。E-mail:liutangzhi@yahoo.com.cn。

Application of Graded Siliceous Sandstone

Liu Tangzhi1, Huang Xichun2, Zhang Jianwei2, Li Junjie1   

  1. 1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China;2. Chongqing Expressway Development of CRBC International Co. Ltd., Chongqing 400020, China
  • Received:2013-05-01 Revised:2013-10-11 Online:2014-10-15 Published:2015-03-10

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摘要： 针对砂岩碎石物理性质差异较大的特点，依托重庆涪丰石高速公路项目，通过室内试验评价其物理、力学性能，对砂岩碎石作为级配碎石原料的可行性进行论证；依据CBR值比选其合理级配类型；以细集料石灰岩掺配砂岩构成级配碎石并研究相关特性。结果表明：硬质砂岩碎石密度较低，吸水率较大，可作为级配碎石原料；依据CBR值比选出连续型级配较为合理；掺配细集料石灰岩对结构强度有一定提高，0.075 mm以下细料的塑性指数及1.18~4.75 mm集料强度显著影响级配碎石强度，砂岩级配碎石强度主要由各档碎石的密实填充形成。

关键词: 道路工程, 硬质砂岩, 垫层, 级配, 集料掺配

Abstract: According to the large differences of siliceous sandstones in physical properties, the feasibility of using siliceous sandstone as graded broken stone material was undertaken, which was based on Fu-Feng-Shi Expressway of Chongqing and the evaluation of their physical and mechanical properties through laboratory test. Secondly, the reasonable gradation types based on the CBR index were selected. Finally, the fine aggregate limestone was mixed with sandstone to get the graded broken stone and explore its interrelated properties. The results show that the siliceous sandstone rubble with low density and high water absorption can be used as the graded broken stone material; continuous gradation on the basis of CBR index is more reasonable; the strength of structure can be improved at a certain degree by blending fine aggregate limestone; the strength of graded broken stone is significantly influenced by fine aggregate with plasticity index under 0.075 mm and aggregate strength between 1.18 and 4.75 mm. The strength of graded sandstone is mainly composed of various levels of gravel packing.

Key words: road engineering, siliceous sandstone, bed course, gradation, aggregate mixing

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