CHARACTERISTICS OF CRACK GROWTH OF HIGH PERFORMANCE CONCRETE SUBJECTED TO FIRE

机译：高性能混凝土裂纹生长特征对火灾进行火灾

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This experimental investigation was conducted to identify the characteristics of crack growth of high performance concrete (HPC) subjected to fire. The R-curve flattening shows that the crack growth resistance has been significantly reduced by elevated temperature. Explosive spalling is an extreme case of the internal cracking driven mainly by vapor pressure. All these results confirmed the vapor pressure mechanism for spalling behavior which should be more significant for denser concrete.

机译：进行了该实验研究以确定对火灾的高性能混凝土（HPC）的裂纹生长特征。 R曲线平坦化表明，裂纹生长抗性已经显着降低了升高的温度。爆炸性剥落是内部裂缝主要通过蒸汽压力驱动的极端情况。所有这些结果证实了用于剥落行为的蒸气压机构，对于更密集的混凝土应该更加重要。

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《International symposium on modern concrete composites infrastructures》|2000年||共7页
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Peng Gai-Fei; Chan Sammy Yin Nin; Michael Anson;
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正文语种
中图分类混凝土结构、钢筋混凝土结构;
关键词
high performance concrete; fire resistance; vapor pressure; crack growth; explosive spalling;

机译：高性能混凝土;耐火;蒸气压;裂纹增长;爆炸剥落;

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专利

1. Characteristics of Crack Growth in High Performance Concrete Subjected to Fire [J] . Gaifei PENG, Sammy Yin Nin CHAN, Jianhua YAN Journal of Materials Science & Technology . 2005,第1期

机译：火灾下高性能混凝土的裂纹扩展特征
2. The Influence Of Cracks On Chloride-induced Corrosion Of Steel In Ordinary Portland Cement And High Performance Concretes Subjected To Different Loading Conditions [J] . S.J.Jaffer, C.M. Hansson Corrosion science . 2008,第12期

机译：裂纹对不同载荷条件下普通硅酸盐水泥和高性能混凝土中氯离子腐蚀的影响
3. Performance of Concrete Members Subjected to Large Hydrocarbon Pool Fires [J] . Renata I. Zwiers, Bruce J. Morgan PCI journal . 1989,第1期

机译：遭受大型烃池火的混凝土构件的性能
4. CHARACTERISTICS OF CRACK GROWTH OF HIGH PERFORMANCE CONCRETE SUBJECTED TO FIRE [C] . Peng Gai-Fei, Chan Sammy Yin Nin, Michael Anson MCCI'2000 . 2000

机译：火灾下高性能混凝土的裂纹扩展特征
5. How Air Voids Affect the Performance of Concrete Subjected to Fire [D] . Chen, Yu. 2019

机译：空气空隙如何影响混凝土的性能受到火灾
6. Fire Performance of Heavyweight Self-Compacting Concrete and Heavyweight High Strength Concrete [O] . Farhad Aslani, Fatemeh Hamidi, Qilong Ma 2019

机译：重型自密实混凝土和重型高强混凝土的防火性能。
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。

CHARACTERISTICS OF CRACK GROWTH OF HIGH PERFORMANCE CONCRETE SUBJECTED TO FIRE

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