石灰岩矿物与化学组成及其在沥青路面结构中的应用研究

发布时间：2018-05-02 13:38

本文选题：石灰岩 + 矿物及化学组成　；参考：《重庆交通大学》2014年硕士论文

【摘要】：由于沉积地区、形成原因和条件、所含矿物成分等差异,造成地壳中存在众多类别的石灰岩。根据矿物化学成分的不同,石灰岩可分为白云质石灰岩、硅质石灰岩、粘土质石灰岩等。不同种类的石灰岩,其集料的强度、压碎值、磨耗值、磨光值等技术特性也是不相同的。集料是路面结构层主要和重要的原材料,各结构层对集料技术特性的要求是不同的,本文依托于《石灰岩在云南省高速公路沥青路面抗滑表层中的应用研究》项目,重点分析石灰岩矿物组成、化学成分与其集料技术特性的关系,研究不同岩性石灰岩的集料在沥青路面结构层中的适用性。本文选取云南省龙瑞高速公路沿线8个石料场的石灰岩进行研究。采用X-射线衍射仪、光谱分析仪、激光粒度仪等仪器对8个石料场的石料进行矿物组成、化学组成、集料的颗粒形态等检测分析。测试不同集料的表观相对密度、吸水率、压碎值、磨耗值、磨光值、抗压强度、坚固性和粘附性等技术指标,借助灰色关联理论分析方法和灰色关联分析软件分析计算石灰岩矿物组成与其集料的技术特性的关联度。结果表明：8个石料场的石灰岩集料具有不同的物理、力学性质,而这些性质都与石灰岩集料的矿物和化学组成有关。其中石灰岩矿物组成中方解石与其集料的技术特性关联度最大,即矿物组成中方解石的含量很大程度上决定了石灰岩集料的物理力学性质。根据分析结果和沥青路面结构层的选材要求,进一步分析了不同技术特性的石灰岩在路面结构层中的适用性。并选取十五标和恩和石料场进行沥青路面抗滑表层路用性能的测试,通过高温稳定性、低温稳定性、水稳定性和抗滑耐磨试验,表明十五标石料场可用于高速公路沥青路面的抗滑表层中。文章从石灰岩的矿物组成、化学成分角度分析不同集料的技术特性,并提出其在沥青路面结构中的适用性,研究成果对今后沥青路面结构选材方法以及石料微观特性分析都有一定的理论意义和实用价值。
[Abstract]:There are many kinds of limestone in the crust because of the difference of the sedimentary area, the formation reason and the condition, the mineral composition and so on. According to the mineral chemical composition, limestone can be divided into dolomitic limestone, siliceous limestone, clay limestone and so on. Different kinds of limestone have different technical properties such as aggregate strength, crushing value, wear value, polishing value and so on. Aggregate is the main and important raw material of pavement structure layer, and the requirements of each structural layer on the technical characteristics of aggregate are different. This paper relies on the project "Application Research of Limestone in the Anti-skid Surface of Asphalt pavement of Yunnan Expressway". The relationship between mineral composition, chemical composition and technical characteristics of limestone is analyzed, and the applicability of aggregate of different lithologic limestone in asphalt pavement structure layer is studied. In this paper, the limestone of 8 stone quarries along Long Rui Expressway in Yunnan Province is studied. The mineral composition, chemical composition and particle morphology of the aggregate in 8 stone fields were analyzed by means of X-ray diffractometer, spectrometer and laser particle size analyzer. The apparent relative density, water absorption, crushing value, wear value, polishing value, compressive strength, firmness and adhesion of different aggregates were measured. The correlation degree between the mineral composition of limestone and the technical characteristics of its aggregate is calculated by means of the grey correlation theory analysis method and the grey correlation analysis software. The results show that the limestone aggregates in the eight sites have different physical and mechanical properties which are related to the mineral and chemical composition of the limestone aggregates. The correlation between calcite and its aggregates is the largest among them, that is, the content of calcite in the mineral composition determines the physical and mechanical properties of limestone aggregates to a great extent. According to the analysis results and the requirements of asphalt pavement structure layer selection, the applicability of limestone with different technical characteristics in pavement structure layer is further analyzed. And select 15 standard and en he stone field to test the performance of asphalt pavement anti-skid surface, through high temperature stability, low temperature stability, water stability and anti-slide wear resistance test, The results show that the 15-year standard stone field can be used in the anti-skid surface of highway asphalt pavement. This paper analyzes the technical characteristics of different aggregates from the point of view of mineral composition and chemical composition of limestone, and puts forward its applicability in asphalt pavement structure. The research results have certain theoretical significance and practical value for the selection method of asphalt pavement structure and the analysis of the microscopic characteristics of stone.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414;U416.216

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