Size Effect on the Bond Behavior of Grouted Reinforcing Bars Embedded in Light-weight Concrete

The ACES bulletin. Association for Comparative Economic Studies (U.S.) Pub Date : 2021-01-01 DOI:10.24086/aces2020/paper.220

Aamer Abbas, Y. Yaqoob, Ola Hussein, I. Al-Ani

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Abstract

This study presents experimentally the bond behavior of light-weight concrete specimens with grouted reinforcing bars in comparison with conventional concrete specimens. A total of (9) pull-out specimens were studied; (3) specimens of conventional concrete, (3) specimens of light-weight concrete, and other (3) specimens of grouted light-weight concrete. Two variables are adopted in this investigation: specimen width and type of concrete (conventional concrete, light-weight concrete and grouted light-weight concrete). The study contains a discussion of the general behavior of the specimens in addition to the study of the ultimate bond capacity, maximum bond stresses and the relationship between the stress and the slip for different pull-out specimens. Results show that bond strength is highest for the largest specimen size (bond strength of grouted light-weight concrete specimen with specimen width 400 mm is higher than that of the specimen with (200 mm) width by about (13.13%)). Also, bond strength is highest for the grouted light-weight concrete specimen (bond strength of grouted light-weight concrete specimen is higher than conventional concrete specimen by (11.11%)).

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轻量混凝土中预埋灌浆钢筋粘结性能的尺寸效应

本文通过试验研究了灌浆配筋轻型混凝土试件与普通混凝土试件的粘结性能。共研究了(9)个拔除标本;(3)常规混凝土试件，(3)轻混凝土试件，其他(3)灌浆轻混凝土试件。本研究采用两个变量:试件宽度和混凝土类型(常规混凝土、轻混凝土和灌浆轻混凝土)。研究了不同拉拔试件的极限粘结能力、最大粘结应力以及应力与滑移的关系，并对试件的一般行为进行了讨论。结果表明:试件尺寸越大，粘结强度最高(试件宽度为400 mm的灌浆轻混凝土试件的粘结强度比试件宽度为200 mm的试件的粘结强度高约13.13%);同时，灌浆轻混凝土试件的粘结强度最高(灌浆轻混凝土试件的粘结强度比常规混凝土试件高11.11%)。

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