EFFECT OF CURING CONDITION BEFORE FREEZING AND THAWING TEST TO FROST RESISTANCE OF HIGH STRENGTH CONCRETE AND HIGH FLUIDITY CONCRETE

Yukio HAMA; Eisuke HAMADA; Osamu SENBU

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EFFECT OF CURING CONDITION BEFORE FREEZING AND THAWING TEST TO FROST RESISTANCE OF HIGH STRENGTH CONCRETE AND HIGH FLUIDITY CONCRETE

机译：冻融试验前的固化条件对高强度混凝土和高流动性混凝土抗冻性的影响

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Frost resistance of high strength/high fluidity concrete was investigated by conducting freezing and thawing tests on specimens with different pre-test curing conditions, outdoor exposure tests for 7 to 12 years, and freezing and thawing tests on specimens after outdoor exposure using 43 mixtures. The effect of initial curing conditions on the frost resistance was found to be greater with high strength/high fluidity concrete than with normal strength concrete. High strength/high fluidity concrete also exhibited significant losses in frost resistance after outdoor exposure. Autogenous shrinkage and drying shrinkage of high strength/high fluidity concrete having a low water-binder ratio are considered to cause fine cracks during exposure, adversely affecting its frost resistance.

机译：高强度/高流动性混凝土的抗冻性是通过对具有不同预测试固化条件的样品进行冷冻和融化测试，7到12年的室外暴露测试以及在室外暴露后使用43种混合物对样品进行冷冻和融化测试来研究的。发现高强度/高流动性混凝土的初始养护条件对抗冻性的影响大于普通强度混凝土。在室外暴露后，高强度/高流动性混凝土的抗冻性也显着降低。具有低水粘合剂比率的高强度/高流动性混凝土的自发收缩和干燥收缩被认为在暴露期间引起细裂纹，从而不利地影响其抗冻性。

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《セメント·コンクリ-ト論文集》 |2002年第56期|共6页
作者
Yukio HAMA; Eisuke HAMADA; Osamu SENBU;
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原文格式 PDF
正文语种 jpn
中图分类水泥工业;
关键词
High strength concrete; High fluidity concrete; Frost resistance; Exposure test; Air content; Spacing factor;

机译：高强度混凝土;高流动性混凝土;耐冻性;暴露试验;空气含量;间距因数;

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1. EFFECT OF CURING CONDITION BEFORE FREEZING AND THAWING TEST TO FROST RESISTANCE OF HIGH STRENGTH CONCRETE AND HIGH FLUIDITY CONCRETE [J] . Yukio HAMA, Eisuke HAMADA, Osamu SENBU セメント·コンクリ-ト論文集 . 2002,第56期

机译：冻融试验前的固化条件对高强度混凝土和高流动性混凝土抗冻性的影响
2. Frost resistance of concrete: proceedings of The international RILEM Workshop on Resistance of concrete to freezing and Thawing with or without de-icing chemicals [J] . M.J. Setzer, R. Auberg Journal of Cold Regions Engineering . 1999,第1期

机译：混凝土的抗冻性：RILEM国际研讨会（在有无除冰剂的情况下抗冻融性）的会议记录
3. Ice Formation as an Indicator of Frost-Resistance on the Concrete Containing Slag Cement in Conditions of Freezing and Thawing [J] . MOSKALENKO Oleksandr, RUNOVA Raisa Materials science forum . 2016,第期

机译：在结冰和融化条件下，冰的形成是含矿渣水泥混凝土抗冻性的指标
4. Effect of Curing Method on the Strength Development and Freezing-Thawing Durability of the Concrete Incorporating High Volume Blast-Furnace Slag Subjected to Initial Frost Damage [C] . Kyung-Taek Koh, Gum-Sung Ryu, Jang-Hwa Lee International Conference on Materials and Products Manufacturing Technology . 2013

机译：固化方法对初始霜冻损伤的高卷高炉渣的混凝土强度发展和冻融耐久性的影响
5. Examining the freezing and thawing behavior of concretes with improved performance through internal curing and other methods. [D] . Jones, Wesley A. 2014

机译：通过内部固化和其他方法检查混凝土的冻融性能，以改善性能。
6. Frost Resistance Number to Assess Freeze and Thaw Resistance of Non-Autoclaved Aerated Concretes Containing Ground Granulated Blast-Furnace Slag and Micro-Silica [O] . Eldar Sharafutdinov, Chang-Seon Shon, Dichuan Zhang, 2019

机译：评估磨碎的高炉矿渣和微硅粉的非高压加气混凝土的抗冻性值以评估其抗冻融性
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. Freezing and Thawing Resistance of High-Strength Concrete. [R] . Philleo, R. E. 1986

机译：高强混凝土的抗冻融性。

EFFECT OF CURING CONDITION BEFORE FREEZING AND THAWING TEST TO FROST RESISTANCE OF HIGH STRENGTH CONCRETE AND HIGH FLUIDITY CONCRETE

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