Experimental study on the effect of aggregate content on fracture behavior of concrete

Felix E. Amparano; Yunping Xi; Young-Sook Roh

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Experimental study on the effect of aggregate content on fracture behavior of concrete

机译：骨料含量对混凝土断裂性能影响的试验研究

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Effect of aggregate content on fracture behavior of concrete is studied by testing on 48 geometrically similar three-point bend concrete beams. The results are analyzed by using a size effect method, in which the fracture behavior of concrete is characterized by two parameters: fracture energy G{sub}f and effective fracture process zone c{sub}f. Test results showed that with increasing volume fraction of aggregate in the range 45-75%: (1) the compressive strength of concrete decreases slightly (15%), and can be practically considered to be a constant; (2) fracture energy G{sub}f varies within 25%, and there is not critical volume fraction which gives the maximum G{sub}f; and (3) the size of the fracture process zone decreases, which may be explained by the change in coarseness of grain structures defined in terms of mosaic patterns.

机译：通过在48个几何相似的三点弯曲混凝土梁上进行试验，研究了骨料含量对混凝土断裂性能的影响。使用尺寸效应方法对结果进行分析，其中混凝土的断裂行为由两个参数表征：断裂能G {sub} f和有效断裂过程区c {sub} f。试验结果表明，随着骨料体积分数的增加，在45-75％范围内：（1）混凝土的抗压强度略有下降（15％），在实践中可以认为是恒定的; （2）断裂能G {sub} f在25％之内变化，并且没有临界体积分数给出最大G {sub} f。（3）断裂过程区的尺寸减小，这可以用镶嵌图案定义的晶粒结构的粗糙度变化来解释。

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《Engineering Fracture Mechanics》 |2000年第1期|共20页
作者
Felix E. Amparano; Yunping Xi; Young-Sook Roh;
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正文语种 eng
中图分类工程力学;
关键词
Fracture; Concrete; Aggregates; Mosaic patterns; Size effect; Beam tests;

机译：断裂;混凝土;骨料;马赛克图案;尺寸效应;梁测试;

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1. Experimental study on the effect of aggregate content on fracture behavior of concrete [J] . Amparano F.E., Xi Y. Engineering Fracture Mechanics . 2001,第1期

机译：骨料含量对混凝土断裂性能影响的试验研究
2. Experimental and Analytical Studies on Fracture Behavior of Fiber-Reinforced Structural Lightweight Aggregate Concrete [J] . Sumit Sahoo, Chandrashekhar Lakavath, S. Suriya Prakash Journal of materials in civil engineering . 2021,第5期

机译：纤维增强结构轻质混凝土骨折行为的实验分析研究
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机译：不同含水量和环境温度下轻质骨料混凝土热性能的试验研究
4. Experimental Study on Flexural Behaviors of Ali-lightweight Aggregate Concrete Beams and Slabs [C] . Yanmin Yang, Hao Zhang International Conference on Non-Conventional Materials and Technologies . 2012

机译：Ali-轻质骨料混凝土梁和板坯弯曲行为的实验研究
5. An experimental study on the guidelines for using higher contents of aggregate micro fines in portland cement concrete. [D] . Ahn, Namshik. 2000

机译：关于在硅酸盐水泥混凝土中使用更高含量的骨料微粉的指导原则的实验研究。
6. Experimental and Numerical Studies on the Direct Shear Behavior of Sand–RCA (Recycled Concrete Aggregates) Mixtures with Different Contents of RCA [O] . Yiming Liu, Shiqiang Huang, Lihua Li, 2021

机译：砂RCA（再生混凝土聚集体）混合物与RCA不同含量的实验和数值研究
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Experimental study on the effect of aggregate content on fracture behavior of concrete

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