土工基础

›› 2019, Vol. 33 ›› Issue (3): 355-358.

• 工程实录 • 上一篇    下一篇

玄武岩细观结构与物理力学特性及路面选用甄别

王朋朋1，张 搏2   

  1. （1.贵州宏信创达工程检测咨询有限公司，贵阳 550014；2.贵州民族大学建筑工程学院，贵阳 550025）
  • 收稿日期:2018-11-25 修回日期:2018-12-10 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:王朋朋（1983-），男，高级工程师，地质工程硕士，研究方向为高速公路施工技术管理、隧道超前预报、勘察设计等。

Meso-structure and Mechanical Properties of Basalt Aggregates as Roadway Surface Course Material

WANG Pengpeng1， ZHANG Bo2   

  1. (1.Guizhou Hongxin Chuangda Engineering Testing & Consulting Co., Ltd., Guiyang 550014；
    2.College of Civil Engineering, Guizhou Minzu University, Guiyang 550025)
  • Received:2018-11-25 Revised:2018-12-10 Online:2019-06-20 Published:2019-08-16

摘要： 毕节地区玄武岩分布广泛，但由于其成因、形成期次、构造背景等因素差异，导致该区玄武岩工程力学指标并不稳定，部分玄武岩不满足路面用砂石料工程力学指标要求。选取毕节地区峨眉山玄武岩样品，根据矿物成分和细观结果将区域玄武岩划分为三种类型，对玄武岩的压碎值、磨耗值和磨光值等三个物理力学指标进行测试。结果表明：受细观结构及矿物成分影响，玄武岩压碎值、磨耗值和磨光值指标存在较大差异；角砾状玄武岩和杏仁状玄武岩磨光值较高，而蚀变程度较低的交织结构拉斑玄武岩和角砾状拉斑玄武岩，均可用于潮湿区高速公路及一级公路表面层。

关键词: 玄武岩, 粗集料, 岩矿分析, 细观结构, 路用特征

Abstract: Due to its good mechanical properties, basalt is widely used as a good coarse aggregate in the highway construction. The Emeishan formation basalt samples in Bijie area were tested and three different types of basalt can be categorized based on their mineral composition and mesostructure properties. The values for crushing, abrasion and polishing were laboratory tested. The test results indicated that, due to the effect of mineral composition and mesostructures, these representative values might vary significantly. Higher abrasion values were obtained from angulartype and almond type basalt samples. The fresh or slightly weathered pulled basalt with interlocked structures can be used as aggregates for the surface course for the pavements in expressway and firstclass highway in wet weather areas.

Key words: Basalt, Coarse Aggregate, Rock Mineral Analysis, Microstructures, Roadway Surface Course