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Comparison of flexural property between high performance polypropylene fiber reinforced lightweight aggregate concrete and steel fiber reinforced lightweight aggregate concrete

機譯：高性能聚丙烯纖維輕骨料混凝土與鋼纖維輕骨料混凝土抗彎性能的比較。

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The main purpose of this study was to investigate the flexural property of high performance polypropylene fiber reinforced lightweight aggregate concrete (HPPLWC) and steel fiber reinforced lightweight aggregate concrete (SFLWC). Firstly, two widely used standards (ASTM C1609 and JSCE SF-4) were used to evaluate their flexural toughness. Meanwhile, the advantages and disadvantages of these two methods in evaluating the flexural toughness of HPPFLWC and SFLWC were analyzed. Then, a new toughness evaluating method specified in JG/T 472-2015 was used. In addition, the optimal fiber content was proposed according to the flexural toughness of fiber reinforced lightweight aggregate concrete. The results showed that the optimal high performance polypropylene fiber (HPPF) content and steel fiber (SF) content were 1.1 vol% and 2.0 vol% respectively. SFs performed better on improving the equivalent initial flexural strength and equivalent residual flexural strength than HPPFs. HPPFs' effectiveness on post peak behavior was higher than its effectiveness on pre-peak behavior. However, SFs performed better on pre-peak behavior than its effect on post-peak behavior. (C) 2017 Elsevier Ltd. All rights reserved.
機譯：這項研究的主要目的是研究高性能聚丙烯纖維增強輕骨料混凝土（HPPLWC）和鋼纖維增強輕骨料混凝土（SFLWC）的抗彎性能。首先，使用兩種廣泛使用的標準（ASTM C1609和JSCE SF-4）評估其撓曲韌性。同時，分析了這兩種方法在評價HPPFLWC和SFLWC的彎曲韌性方面的優(yōu)缺點。然后，使用了JG / T 472-2015中指定的新的韌性評估方法。另外，根據(jù)纖維增強輕骨料混凝土的抗彎韌性，提出了最佳纖維含量。結(jié)果表明，最佳高性能聚丙烯纖維（HPPF）含量和鋼纖維（SF）含量分別為1.1vol％和2.0vol％。與HPPF相比，SF在改善等效初始抗彎強度和等效殘余抗彎強度方面表現(xiàn)更好。 HPPF對峰值后行為的有效性高于其峰值前行為的有效性。但是，SF在峰前行為上的表現(xiàn)要好于峰后行為。 （C）2017 Elsevier Ltd.保留所有權(quán)利。

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