Evaluation of Mechanical Properties of Two-Stage Concrete and Conventional Concrete Using Nondestructive Tests

Ali M. Rajabi; Farzam Omidi Moaf; Hakim S. Abdelgader

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Evaluation of Mechanical Properties of Two-Stage Concrete and Conventional Concrete Using Nondestructive Tests

机译：使用非破坏性测试评估两级混凝土和常规混凝土的机械性能

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Different types of concrete mixtures are used as building materials. The manufacturing process of two-stage concrete (TSC) differs from that of conventional concrete. This study investigated conventional mechanical properties derive empirical relations for estimation of the mechanical parameters of TSC and conventional concrete mixtures. TSC was used to prepare 216 specimens and conventional concrete was used to prepare 108 specimens that then were aged for 28 days. Uniaxial compression, Brazilian tensile strength, and point load tests were carried out as destructive testing. Schmidt hammer and ultrasonic pulse velocity tests were carried out as nondestructive testing. The data from testing were categorized as regression or test data. Empirical relations were derived between the parameters for the two types of concrete, and these relations were validated. It was concluded that indirect, nondestructive testing of engineering materials, including concrete, considerably increases the speed and decreases the estimation cost of determining the mechanical parameters. This method can be recommended for estimation of these mechanical parameters.

机译：不同类型的混凝土混合物用作建筑材料。两级混凝土（TSC）的制造过程与常规混凝土的制造过程不同。本研究研究了常规的力学性质来估计TSC和常规混凝土混合物的机械参数的经验关系。使用TSC制备216个标本，使用常规混凝土制备108℃下28天的样品。单轴压缩，巴西拉伸强度和点载试验是作为破坏性测试进行的。施密锤和超声波脉冲速度试验是无损检测的。从测试中的数据被分类为回归或测试数据。验证了两种混凝土的参数之间的经验关系，这些关系得到了验证。它的结论是，间接的，包括混凝土的工程材料的间接测试，显着提高了速度并降低了确定机械参数的估计成本。可以建议使用该方法来估计这些机械参数。

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《Journal of materials in civil engineering》 |2020年第7期|04020185.1-04020185.10|共10页
作者
Ali M. Rajabi; Farzam Omidi Moaf; Hakim S. Abdelgader;
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作者单位

Dept. of Engineering Geology School of Geology College of Science Univ. of Tehran Tehran 1417614411 Iran;

Dept. of Civil Engineering Univ. of Qom Qom 3391758774 Iran;

Faculty of Civil and Environmental Engineering Gdansk Univ. of Technology Gabriela Narutowicza 11/12 80-233 Gdansk Poland Dept. of Civil Engineering Univ. of Tripoli P.O. Box 83038 Tripoli Libya;

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正文语种 eng
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Empirical relations; Mechanical parameters; Destructive and nondestructive tests; Two-stage concrete; Preplaced aggregate concrete; Conventional concrete;

机译：实证关系;机械参数;破坏性和无损测试;两级混凝土;预先复制骨料混凝土;传统混凝土;

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专利

1. Development of Prediction Models for Mechanical Properties and Durability of Concrete Using Combined Nondestructive Tests [J] . Amini Kamran, Cetin Kristen, Ceylan Halil, Journal of materials in civil engineering . 2019,第2期

机译：结合无损检测方法开发混凝土力学性能和耐久性预测模型
2. Statistical Modeling of Hydraulic and Mechanical Properties of Pervious Concrete Using Nondestructive Tests [J] . Amini Kamran, Wang Xuhao, Delatte Norbert Journal of materials in civil engineering . 2018,第6期

机译：使用无损检测的渗透混凝土水力学性能统计模型
3. Mechanical properties of old concrete using destructive and ultrasonic nondestructive testing methods [J] . I. N. Prassianakis, P. Giokas Magazine of Concrete Research . 2004,第5期

机译：使用破坏性和超声非破坏性测试方法的旧混凝土力学性能
4. Evaluation of residual mechanical properties of steel fiber-reinforced reactive powder concrete after exposure to high temperature using nondestructive testing [C] . Xiaomeng Hou, Muhammad Abid, Wenzhong Zheng Conference on Performance-based Fire and Fire Protection Engineering . 2018

机译：使用非破坏性测试在高温暴露于高温后钢纤维增强活性粉混凝土的残留力学性能评价
5. Nondestructive testing and evaluation of concrete. [D] . Malik, Akhtar Ali. 1992

机译：混凝土的无损检测和评估。
6. Mesoscale Modelling of Concretes Subjected to Triaxial Loadings: Mechanical Properties and Fracture Behaviour [O] . Qingqing Chen, Yuhang Zhang, Tingting Zhao, 2021

机译：经过三轴载荷的混凝土的Messcale建模：机械性能和骨折行为
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。
8. Application of Nondestructive Testing Techniques for Evaluation of the Engineering Properties of Portland Cement Concrete. Volume 1. [R] . seals,roger k. anderson,david a. 1975

机译：无损检测技术在硅酸盐水泥混凝土工程性能评价中的应用。第1卷。

Evaluation of Mechanical Properties of Two-Stage Concrete and Conventional Concrete Using Nondestructive Tests

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