Residual compressive strength of hardened OPC/CAC paste after fire exposure

Zhang Qi; Xu Shilang; Zeng Qiang

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Residual compressive strength of hardened OPC/CAC paste after fire exposure

机译：火灾后硬化的OPC / CAC胶的残余抗压强度

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Cementitious fire-retardant coatings are widely used for fire protection of structures. Recently, blended pastes of ordinary Portland cement (OPC) and calcium aluminate cement (CAC) have started to be used as binders in cementitious fire-retardant coatings, but the fire resistance and chemical composition of various OPC/CAC pastes are still not clear. The residual compressive strengths of binary cement pastes with various OPC/CAC ratios after fire exposure were studied in this work. The mineral composition and microstructure of the pastes were characterised by X-ray diffraction and environmental scanning electron microscopy/energy dispersive spectrometry, respectively. It was found that the paste with an OPC/CAC ratio of 60/40 was the most fire-resistant.

机译：水泥质阻燃涂料被广泛用于建筑物的防火。近来，普通波特兰水泥（OPC）和铝酸钙水泥（CAC）的混合浆料已开始用作水泥质阻燃涂料的粘合剂，但各种OPC / CAC浆料的耐火性和化学组成仍不清楚。在这项工作中，研究了具有不同OPC / CAC比的二元水泥浆在火灾后的残余抗压强度。分别通过X射线衍射和环境扫描电子显微镜/能量分散光谱对糊的矿物组成和微观结构进行表征。已发现，OPC / CAC比为60/40的糊剂最耐火。

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来源
《Magazine of Concrete Research》 |2019年第10期|548-556|共9页
作者
Zhang Qi; Xu Shilang; Zeng Qiang;
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作者单位

Zhejiang Univ, Coll Civil Engn & Architecture, Inst Adv Engn Struct & Mat, Hangzhou, Zhejiang, Peoples R China;

Zhejiang Univ, Coll Civil Engn & Architecture, Inst Adv Engn Struct & Mat, Hangzhou, Zhejiang, Peoples R China;

Zhejiang Univ, Coll Civil Engn & Architecture, Inst Adv Engn Struct & Mat, Hangzhou, Zhejiang, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
cement paste; cement; cementitious materials; compressive strength;

机译：水泥浆;水泥;胶凝材料;抗压强度;

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专利

1. Residual compressive strength of hardened OPC/CAC paste after fire exposure [J] . Zhang Qi, Xu Shilang, Zeng Qiang Magazine of Concrete Research . 2019,第9a10期

机译：火灾曝光后硬化OPC / CAC糊的残留抗压强度
2. Microstructure-based modeling of residual yield strength and strain hardening after fire exposure of aluminum alloy 5083-H116 [J] . Patrick T. Summers, Adrian P. Mouritz, Scott W. Case, Materials Science and Engineering . 2015,第apra24期

机译：基于微观结构的铝合金5083-H116火灾后残余屈服强度和应变硬化的建模
3. Superior physico-mechanical, fire resistivity, morphological characteristics and gamma radiation shielding of hardened OPC pastes incorporating ZnFe_2O_4 spinel nanoparticles [J] . Construction and Building Materials . 2020,第Feba20期

机译：掺有ZnFe_2O_4尖晶石纳米粒子的硬化OPC浆料的优异物理力学，耐火性，形态学特征和伽马辐射屏蔽
4. Using high temperature for improve compressive strength of ordinary Portland cement paste (OPC) - A new approach [C] . Abdoullah Namdar, Fadzil Mat Yahaya, Mashita Mohd Yusoff International Conference on Advanced Materials Research . 2014

机译：使用高温提高普通波特水泥膏（OPC）的抗压强度 - 一种新方法
5. Probabilistic Multilevel Constitutive Model of the Compressive Strength of Hardened Cement Paste Reinforced with MWCNts [D] . Cruz, Yohanna Mejia. 2018

机译：用MWCNTS加固硬化水泥浆料抗压强度的概率多型模型
6. Residual Compressive Strength of Recycled Aggregate Concretes after High Temperature Exposure [O] . Francisco B. Varona, Francisco Baeza-Brotons, Antonio J. Tenza-Abril, 2020

机译：高温暴露后再生骨料混凝土的残余抗压强度
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。

Residual compressive strength of hardened OPC/CAC paste after fire exposure

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