This paper presents experimental investigation on improvement of mechanical properties of both plain cement concrete (PCC) and fibre reinforced concrete (FRC) confined with un-plastisized poly-vinyl chloride (UPVC) pipes, which has been considered for enhancing durability of concrete structures. UPVC pipes with outer diameter 160 mm and length 300 mm have been used with three different average thicknesses viz. 2.55 mm, 4.0 mm and 5.8 mm, respectively to explore its composite performance, effectiveness in strength and ductility improvement in construction industry particularly in corrosion environment. Three series of concrete M20, M25, M30 have been designed as per the latest version of Indian Standard Code of practice IS 10262:2009. A total of 54 concrete filled UPVC pipe specimen and 27 unconfined concrete control specimen have been cast and tested using displacement controlled universal testing machine having 2000 kN capacity. The modes of deformation, load-deformation curve have been noted and detail analysis & comparison has been made with unconfined, control specimen. Attempt has also been made to study UPVC pipe confinement effect on improvement of concrete strength and the load–deformation behaviour considering both PCC and FRC.

中文翻译：

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UPVC管约束PCC和FRC力学性能的实验研究。

本文提出了实验研究，以改善普通水泥混凝土（PCC）和用未增塑的聚氯乙烯（UPVC）管约束的纤维增强混凝土（FRC）的机械性能，已考虑将其用于增强混凝土结构的耐久性。已使用外径为160毫米，长度为300毫米的UPVC管，具有三种不同的平均厚度。分别研究2.55毫米，4.0毫米和5.8毫米，以探索其复合性能，在建筑行业特别是在腐蚀环境下提高强度和延展性的有效性。根据印度标准操作规范IS 10262：2009的最新版本，设计了三个系列的混凝土M20，M25，M30。使用容量为2000 kN的位移控制万能试验机浇铸和测试了总共54根混凝土填充UPVC管样品和27根无限制混凝土对照样品。记录了变形模式，载荷-变形曲线，并对无约束的控制样本进行了详细的分析和比较。还尝试研究同时考虑PCC和FRC的UPVC管约束对改善混凝土强度和载荷-变形行为的影响。