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MECHANICAL PROPERTIES OF MRP LIGHTWEIGHT CONCRETE AND EFFECT OF COMPRESSIVE STRENGTH ON SHEAR CAPACITY OF BEAMS

Authors: Wissam Kadhim AlsaraJ --- Layth Abedalbari Aljaberi --- Hayam Yousuf Alhamdani
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 4 Pages: 145-154
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The objective of this study is to investigate the effect of compressive strength on the shear capacity of Modified Reactive Powder Lightweight Concrete (MRPLWC) Beams. The structural behavior of (3) MRPLWC beams without web reinforcement under two point loading system , are studied. Three percentage of Silica Fume (SF) were used to improve the compressive strength of MRPLWC. The experimental results pointed that a positive correlation between the compressive strength and diagonal cracking load and ultimate shear load. Increasing the compressive strength from (89.53 MPa) to (90.3) MPa lead to increase the diagonal cracking load Vcr and increasing ultimate shear load Vu .


Article
SHEAR RESISTANCE OF MRPC LIGHTWEIGHT CONCRETE BEAMS WITHOUT STIRRUPS

Authors: Wissam Kadhim AlSaraj --- Layth Abedalbari AlJaberi --- Hayam Yousuf Alhamdani
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 5 Pages: 1-11
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

: Shear behavior of (9) modified reactive powder lightweight concrete beams (MRPLWC) beams without web reinforcement under two point loading system, are studied. A number of variables are used to show their effects on the diagonal cracking load and ultimate shear load. Those variables are: volume fraction of fiber (Vf), ratio of longitudinal reinforcement (ρ) and the ratio of the shear span to the effective depth (a/d). The test results show that the shear strength increased by increasing the volume fraction and the ratio of longitudinal reinforcement, while a reduction in shear capacity is noticed by increasing the ratio of shear span to effective depth (a/d).

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