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首页> 外文期刊>Construction and Building Materials >Assessing the bond strength of Glass Fiber Reinforced Polymer (GFRP) bars in Portland Cement Concrete fabricated with seawater through pullout tests
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Assessing the bond strength of Glass Fiber Reinforced Polymer (GFRP) bars in Portland Cement Concrete fabricated with seawater through pullout tests

机译：通过拉出试验评估玻璃纤维增​​强聚合物（GFRP）棒的玻璃纤维增​​强聚合物（GFRP）棒的粘结强度

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Portland Cement Concrete (PCC) is the most used construction material worldwide and its use is expected to increase in the future. PCC intensively uses two main natural resources, namely aggregates and fresh water. The concrete industry consumes about 2 billion tons of potable water annually. Due to climate change, rapid population growth, and industrial activity, there is a scarcity of fresh water; by 2025 more than half of the world's population will be living in water-stressed areas. In contrast, there is abundant seawater in the world, which represents about 97.5% of the total Earth's water. However, the incorporation of seawater in PCC is a complex problem because the sulfate ions can affect the microstructure durability and the chloride ions can accelerate reinforcing steel corrosion, which can compromise the structural integrity. Glass Fiber Reinforced Polymer (GFRP) bars may be used as an alternative reinforcing material to avoid corrosion. This paper assesses the bond strength of two types of GFRP bars with either a sand-coating or spiral grooves using a standard pullout test. Control samples were prepared using concrete made with potable water and compared with companion specimens made with seawater. Parallel experimental programs were carried out in Chile and Canada, with a total of 70 test specimens. The results suggest that there is no statistically significant difference in the short-term (28 day) bond strength of GFRP bars in seawater concrete compared to normal concrete. (C) 2020 Elsevier Ltd. All rights reserved.
机译：波特兰水泥混凝土（PCC）是全球最常用的建筑材料，其使用预计将来会增加。 PCC集中利用两个主要的自然资源，即骨料和淡水。混凝土行业每年消耗约20亿吨饮用水。由于气候变化，人口迅速增长和工业活动，淡水稀缺;到2025年，世界上一半以上的人口将居住在耐水区。相比之下，世界上有丰富的海水，占地球总水的约97.5％。然而，PCC中的海水掺入是一个复杂的问题，因为硫酸硫离子可以影响微观结构耐久性，并且氯离子可以加速增强钢腐蚀，这可能会损害结构完整性。玻璃纤维增​​强聚合物（GFRP）棒可用作替代加强材料，以避免腐蚀。本文评估了使用标准拉出试验的砂涂或螺旋槽的两种类型GFRP棒的粘合强度。使用用饮用水制成的混凝土制备对照样品，并与海水制成的伴侣标本进行比较。并行实验计划在智利和加拿大进行，共有70个测试标本。结果表明，与普通混凝土相比，海水混凝土中GFRP棒的短期（28天）粘合强度没有统计学显着差异。 （c）2020 elestvier有限公司保留所有权利。

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