寒冷地区海洋环境下高性能混凝土合理配合比研究

发布时间：2018-01-14 08:15

本文关键词：寒冷地区海洋环境下高性能混凝土合理配合比研究　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：青龙河大桥和纳潮河2号大桥地处渤海湾,该地区的混凝土结构长年遭受较严重的海水侵蚀以及冻害,导致结构的耐久性不足。为确保寒冷地区海洋环境下混凝土结构长期安全性能,本文以曹妃甸经济开发特区的青龙河大桥和纳潮河2号大桥为背景,通过理论与试验研究,探讨适用于寒冷地区海洋环境下混凝土的配合比设计方法,研究的主要内容及结论如下:1、详细介绍混凝土的各组成成份,探讨各组成成份对混凝土性能的影响。由于高性能混凝土以耐久性作为首要考虑目标,所以矿物掺合料的选取至关重要。通过分析探讨矿物掺合料的研究现状,选择粉煤灰和矿渣粉的复合掺合料作为寒冷地区海洋环境下高性能混凝土的原材料。2、介绍高性能混凝土配合比的常用设计方法,通过对比分析,选择全计算法研究寒冷地区海洋环境下高性能混凝土的配合比。3、基于全计算法,计算C45等级高性能混凝土的配合比。根据计算得出的配合比,设计相关的性能测试试验。根据试验结果分析全计算法计算寒冷地区海洋环境下高性能混凝土配合比存在的不足,并提出修正后的全计算法。4、以基准配合比为依据,结合试验得出修正系数γ的合理取值范围。运用修正后的全计算法,计算C50和C55等级高性能混凝土的配合比。根据计算结果设计相关验证试验,通过试验结果来验证修正后的全计算法的适用性。
[Abstract]:Qinglong River Bridge and tidal creek No. 2 bridge is located in Bohai Bay, the concrete structure in the area has suffered serious erosion and damage, which leads to the deficiency of the durability of the structure. In order to ensure that the marine environment in cold area of concrete structures under the long-term safety, based on the economic development of Caofeidian Qinglong River Bridge and Tidal River No. 2 bridge as the background, through theoretical and experimental research, to explore the application with the marine environment in cold regions under the concrete design method, the main research contents and conclusions are as follows: 1, introduces the concrete components, the effects of different components on the properties of concrete. Because of the high performance concrete durability as the primary consider the target, so essential mineral admixture selected material. Through the analysis of present situation of mineral admixtures, combined with fly ash and slag powder as material For the cold area under the marine environment of the high performance concrete raw material.2, the high performance concrete mix ratio design method, through comparative analysis, choose the calculation method of high performance concrete in cold area in the marine environment, with the ratio of.3, overall calculation method based on calculation with C45 grade high performance concrete according to the ratio. With the calculated ratio, design related performance test. According to the test results, calculation of concrete in cold area of high performance marine environment mix problems analysis method, and put forward the calculation method of.4 modified, with benchmark mix as the basis, combined with the test results of the reasonable range of gamma correction coefficient using. The whole algorithm revised the calculation of C50 and C55 with the grade of high performance concrete. According to the results of design verification test, through the test results to verify the modified full The applicability of the calculation method.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528

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