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首页> 外文期刊>Materials and structures >Prediction and model development for fatigue performance of pervious concrete made with over burnt brick aggregate
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Prediction and model development for fatigue performance of pervious concrete made with over burnt brick aggregate

机译：用烧焦砖骨料制造的渗透混凝土疲劳性能的预测与模型开发

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摘要

The inadequacy of regular stone aggregate in North East India, has motivated the developers to search for an alternate construction material and prime subject of the present study is to use waste crushed bricks as a coarse aggregate in pervious concrete pavement. Pervious concrete, due to its inclusive beneficial aspects has become an embryonic solution to fight against the current hydrological and environmental threats. A number of research have been carried out to characterize the pervious concrete, however, there is a lack of study related to the fatigue performance of pervious concrete pavement. As the pavements are often subjected to fatigue loading, the present study mainly focuses on the response of pervious concrete pavement under the action of fatigue loading. Laboratory tests are performed on beam specimens under various stress levels and loading frequencies. Different types of aggregate gradations are also used to account the size effect of the coarse aggregate. The S-N curves for fatigue life is generated to obtain the relationship between the stress level and fatigue life and it is observed that the S-N curve follows a power law, irrespective of loading frequencies. The survival percentage of porous specimens are checked through non-parametric Kaplan-Meir survival analysis and the distributions of the fatigue data are checked through lognormal and 3-parameter Weibull distributions. Further, a modified fatigue model is developed for idealising the fatigue life of pervious concrete pavement made with over burnt brick aggregate and compared with the existing fatigue models.
机译：印度东北印度常规石材总产的不足，该研究的开发人员正在寻找替代建筑材料和本研究的素质主题是将废弃碎砖用作腐烂的混凝土路面中的粗骨料。由于其包容性的有益方面，透水混凝土已成为对抗目前水文和环境威胁的胚胎解决方案。已经进行了许多研究，以表征了透水的具体，然而，缺乏与透水混凝土路面的疲劳性能有关的研究。随着路面经常受到疲劳载荷，本研究主要集中在疲劳负荷作用下渗透混凝土路面的响应。在各种应力​​水平下对梁样本进行实验室测试和装载频率。不同类型的聚集灰度也用于考虑粗骨料的尺寸效应。生成疲劳寿命的S-N曲线以获得应力水平与疲劳寿命之间的关系，并且观察到S-N曲线遵循动力法，而不管装载频率如何。通过非参数kaplan-meir存活分析检查多孔样本的存活百分比，并通过Lognormal和3参数Weibull分布检查疲劳数据的分布。此外，开发了一种改进的疲劳模型，用于理想，用于理想，用于燃烧砖聚集体的透雕混凝土路面的疲劳寿命，与现有的疲劳模型相比。

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