Engineering properties and structural behaviour of high strength reinforced concrete beams
type: CreativeWork
description: High Strength Concrete (HSC) has become a viable alternative to lower strength concrete. However, its utilisation is increasing faster than the development of suitable design recommendations. This is because limited and diverse investigations have been carried out concerning engineering properties and structural behaviour of HSC. The experimental investigation and theoretical considerations described in this thesis have been undertaken as an attempt to start to remedy this problem. As part of the investigation into the structural behaviour of HSC beams, a series of 18 different concrete mixes were tested in order to optimise HSC mixes using local aggregates. The effect of different factors such as w/c ratios, silica fume and superplasticizer dosages on compressive strength and splitting tensile strengths in the range of 80 to 120 N/mm2 (MPa) were studied. Additionally, new mathematical expressions were developed to replace some of the currently used relationships concerning HSC as a material, for a wide range of concrete mixes. The second part of this investigation concerned the structural behaviour of singly reinforced HSC beams in flexure. A total of 13 beams were manufactured using selected concrete mixes obtained from the first part of the investigation, i.e., 80, 100 and 120 MPa respectively. The size of the beam specimens was determined in order to make the beam fail in flexure, and also to be sufficiently large to simulate a real structural element of HSC. There were three beams in each of four groups, with the exception of group two which had four. For each group of beams the tensile reinforcement ratios were 1.03%, 1.42%, 1.94%, and 4.04% respectively. The test variables were thus the concrete strength and the longitudinal reinforcement ratio. The third part of this investigation concerned the structural behaviour of doubly reinforced HSC beams in flexure. Four beams were cast and tested using the same criteria of the singly reinforced beams. The variables …
abstract: High Strength Concrete (HSC) has become a viable alternative to lower strength concrete. However, its utilisation is increasing faster than the development of suitable design recommendations. This is because limited and diverse investigations have been carried out concerning engineering properties and structural behaviour of HSC. The experimental investigation and theoretical considerations described in this thesis have been undertaken as an attempt to start to remedy this problem. As part of the investigation into the structural behaviour of HSC beams, a series of 18 different concrete mixes were tested in order to optimise HSC mixes using local aggregates. The effect of different factors such as w/c ratios, silica fume and superplasticizer dosages on compressive strength and splitting tensile strengths in the range of 80 to 120 N/mm2 (MPa) were studied. Additionally, new mathematical expressions were developed to replace some of the currently used relationships concerning HSC as a material, for a wide range of concrete mixes. The second part of this investigation concerned the structural behaviour of singly reinforced HSC beams in flexure. A total of 13 beams were manufactured using selected concrete mixes obtained from the first part of the investigation, i.e., 80, 100 and 120 MPa respectively. The size of the beam specimens was determined in order to make the beam fail in flexure, and also to be sufficiently large to simulate a real structural element of HSC. There were three beams in each of four groups, with the exception of group two which had four. For each group of beams the tensile reinforcement ratios were 1.03%, 1.42%, 1.94%, and 4.04% respectively. The test variables were thus the concrete strength and the longitudinal reinforcement ratio. The third part of this investigation concerned the structural behaviour of doubly reinforced HSC beams in flexure. Four beams were cast and tested using the same criteria of the singly reinforced beams. The variables …
author: Adwan, Osama
language: eng
date published: 1997-7
date modified: 2026-07-24T00:50:23Z
provider: Abertay University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Abertay Dundee