钢渣混凝土物理力学性能的试验研究

发布时间：2018-04-12 23:30

本文选题：导电混凝土 + 钢渣　；参考：《沈阳建筑大学》2014年硕士论文

【摘要】：混凝土凭借其抗压强度高、耐久性好、强度等级范围宽等优点,已经是目前建筑行业用量最大的建筑材料。但是,大部分的混凝土还是以传统的形式应用在建筑的主体部分。随着智能混凝土概念的提出,越来越多的专家和学者对混凝土导电性能展开了研究。近年来的研究表明,混凝土的导电性能可用于电力行业接地装置以及结构的自我监控等领域。近年来,由于接地装置的腐蚀问题严重威胁着电力系统的安全运行,使其倍受人们关注。引起接地事故及隐患的主要原因是由于地下接地装置的腐蚀破坏。而且对埋入变电站正下方的接地装置进行维修和更换是相当麻烦的事情,其工作量以及花费的金额都是巨大的。因而,这是一个摆在我们面前亟待解决的问题。导电混凝土对接地电极的包裹可以起到有效的降阻防腐的效果。考虑到安全性和经济性,导电混凝土包裹在接地体的表面,以提高接地体的耐腐蚀性,这具有延长接地网使用寿命的重要意义。然而这一部分的研究仍然处于初级阶段,仍然是不完整的,所以很有必要对混凝土体积电阻率以及导电性进行系统的理解与研究。针对以上问题本文提出并研究了钢渣混凝土作为一种新型的混凝土在接地网中的应用前景。本文针对钢渣的物理力学性能以及国内外专家学者对钢渣的研究现状,展开了钢渣混凝土的导电性能、力学性能以及抗渗防腐性能的试验研究,为接地装置防腐提供了理论和实验基础。文章主要研究了钢渣混凝土的抗压强度、电阻率、压敏性以及抗渗性能,同时分析了影响以上性能的各种内外因素。论文在阐述实验现象的同时,对钢渣混凝土的导电性、压敏性以及抗渗性能机理做出了简单分析,取得了如下研究成果：(1)以钢渣为骨料配制出的钢渣混凝土,在具有优秀工程力学性能的同时还兼具突出的导电性能,这对于控制导电混凝土的配制成本意义重大,而且还开辟了钢渣的一种全新的应用途径,具有显著的社会、经济、生态环境效益；(2)试验研究了不同钢渣掺量的混凝土的各项物理力学性能,结果表明钢渣与水泥的质量比在1-3范围内时,混凝土表现出了良好的综合性能；(3)试验考察了钢渣混凝土的导电性能及力学性能与钢渣掺量、养护龄期以及粉煤灰的掺入等因素之间存在的关系；(4)试验在对钢渣混凝土压敏性的研究过程中,指出了其体积电阻率与轴向压力之间的相互关系。试件在受压过程中,电阻率的变化呈现一种先减小后趋于平缓,最后迅速增大的趋势；(5)本文在研究钢渣混凝土压敏性能的同时,对影响钢渣混凝土压敏性能的各种影响因素做了相应的试验研究；(6)文章以空气渗透系数法对钢渣混凝土的抗渗性能进行了试验研究,发现随着钢渣掺量的增加,钢渣混凝土的抗渗性能先增强后降低,在此基础之上,对钢渣混凝土抗渗性能造成影响的各项因素进行了试验分析。
[Abstract]:Concrete with high compressive strength, good durability, strength grade of a wide range of advantages, the construction industry is currently the largest amount of building materials. However, most of the concrete or in the application of traditional form in the construction of the main part. With the development of intelligent concrete concept, more and more experts and scholars begin to study conducting the performance of the concrete. Recent studies show that the conductive properties of concrete can be used for the grounding device and the structure of the electric power industry self monitoring and other fields. In recent years, due to the safe operation of grounding device corrosion problem is a serious threat to the power system, which has attracted much attention. The main cause of the grounding accident and the potential is damage due to corrosion of underground grounding device. But the ground buried just below the substation device for repair and replacement is a very troublesome thing, the workload to The amount and cost is huge. Therefore, this is a place in front of us to solve problems. The conductive concrete grounding electrode package can play a drop of effective corrosion protection effect. Considering the safety and economy of conductive concrete is wrapped on the surface of the grounding body, in order to improve the ground the corrosion resistance, which has important significance to prolong the service life of the grounding grid. However, the study of this part is still in the initial stage, is still not complete, so it is necessary to understand the system of volume resistivity and conductivity of concrete and research. To solve the above problems this paper proposes and application prospect of steel slag concrete as a new type of concrete in the grounding grid. In this paper the physical and mechanical properties of steel slag as well as the domestic and foreign experts and scholars on the slag research situation, launched the conductivity of steel slag concrete, The mechanical properties and impermeability test of corrosion resistance, provides theoretical and experimental basis for grounding device corrosion. The compressive strength of steel slag concrete, this paper mainly studies the resistivity, pressure sensitive and impermeability, and analyzes various influence factors inside and outside the above performance in this paper. The experimental phenomena at the same time, conductivity on the pressure sensitivity of steel slag concrete, and impermeability mechanism makes a simple analysis, the findings are as follows: (1) using steel slag as aggregate of steel slag concrete, has excellent performance in engineering mechanics but also possesses excellent electrical conductivity, for the control of conductive concrete preparation cost is of great significance, but also it opens up a new way of application of steel slag, has the remarkable social, economic, ecological and environmental benefits; (2) the test of different steel slag concrete Physical and mechanical properties, and the results show that the steel slag cement mass ratio in the range of 1-3, concrete is a good comprehensive performance; (3) the performance test of steel slag and conductive and mechanical properties of steel slag concrete, the relationship between curing time and fly ash and other factors; (4) test in the process of study on pressure sensitivity of steel slag concrete, points out the relationship between the volume resistivity and axial pressure. The specimens in compression process, the change of resistivity showed a decreased slowly, finally the rapidly increasing trend; (5) at the same time, in the pressure sensitive performance study of steel slag concrete. The various factors of the influence of varistor properties of steel slag concrete has been studied accordingly; (6) the air permeability coefficient method anti permeability test on steel slag concrete, with steel slag The impermeability of steel slag concrete first increased and then decreased. The factors affecting the impermeability of steel slag concrete were tested and analyzed.

【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528

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