毕业论文---新桥机场跑道高性能混凝土

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1、 摘要摘要 随着对机场运输要求的日益提高，发展“长寿命低维护道面” ，提高混凝土 的抗折强度与耐久性等诸多性能是当前道面混凝土的发展趋势。 本文利用正交试 验的方法，以最少的试验组数确定干硬性混凝土的最佳配合比。找到道面混凝土 抗折强度、密实度、耐磨性能与水灰比，砂率，水泥用量的关系。对于强度存在 最适合的砂率，水灰比与抗折、抗压强度均成反比。水泥用量的增加明显提高混 凝土的强度，但要综合考虑经济效益问题。对于耐磨性能试验结果证明砂率越小 耐磨性能越好。并且通过功效分析法，综合考虑各因素的影响大小，结合工程实 际找到最佳配合比。粉煤灰的掺入通过扫描电镜观察可以与水化产物凝胶 Ca （OH）2发

2、生二次反应改善孔结构。试验中还用到了减水剂，钢纤维，来达到混 凝土的高抗折强度和对耐久性的提高，并取得不错的效果。 关键词关键词：干硬性混凝土 耐久性 粉煤灰 钢纤维 Abstract With the increasing requirements of the airport transportation, development, “long-life low maintenance pavement“ to increase the flexural strength of concrete, and many performance and durability of the cur

3、rent development trend of the concrete pavement. In this paper, orthogonal experiment to determine the minimum number of test group the best dry concrete mix. Find the flexural strength of concrete pavement, density, abrasion resistance and water-cement ratio, sand ratio, the relationship between th

4、e amount of cement. There is the most suitable for the strength of sand ratio, water-cement ratio and the flexural and compressive strength are inversely proportional. Increase in cement content significantly improved the strength of concrete, but considering the economic problems. For the wear test results show that the smaller the wear rate of the better sand. And through the efficacy analysis, considering the size of the various factors, combined with engineering practice to find the