Mohammed Hashim Mohammed

Mustansiriyah University

This paper presents an experimental investigation of the flexural behavior of reinforced concrete one-way slabs with longitudinal hollows. Hollow ratios (weight reductions) used in this work are 11.43% and 22.86%. Two longitudinal reinforcement ratios (ρ = 0.58 % and 1.03 %) and four steel fibers volumetric ratios (Vf = 0, 0.2, 0.4, and 0.8%), were...

Seven ultra high-performance concrete (UHPC) beams without shear reinforcement are tested in this work to examine their structural behavior as shear failure is a major concern in such members. Coarse aggregate was not used in two of the beams while the other five are made with coarse aggregate as 50% replacement of fine sand. Three longitudinal ste...

Recycling demolition waste materials as construction materials offers environmental as well as economic benefits by protecting virgin materials and reducing overall costs of project. This paper presents an experimental investigation on flexural behavior of reinforced concrete beams made with coarse aggregate fully 100 % or partially 50 % replaced b...

The coefficient of friction is a measurement of the frictional force between two objects. As the temperature of the pavement changes, it might slide against the resistance of the supporting subbase. In order for pavement to perform as anticipated, this resistance must be calculated. Concrete cracking does not occur when the pavement is joined. A me...

The coefficient of friction is a quantity indicates the ratio of frictional force between objects. As pavement experiences thermal changes, it may slide against supporting subbase resistance. This resistance must be determined in order for pavement to perform as anticipated. Cracking of concrete does not occur if the pavement is jointed. In the joi...

This paper presents an experimental investigation on stress-strain behavior of normal and high strength self-compacting concrete with two different maximum aggregate sizes. Eight mixes are adopted for this purpose with nominal compressive strength ranging from 20 to 80 MPa and maximum aggregate size of 10 and 20 mm. Results show that the ascending...

One of the most serious problems of reinforced concrete structures is corrosion of embedded reinforcing steel bars especially in aggressive environments. To control steel corrosion, several approaches have been followed but do not introduce 100% corrosion resistance and guaranteed longterm performance. Glass Fiber Reinforced Polymer (GFRP) bars are...

In this paper, the ABAQUS / CAE 6.13.1 program is used to study the effect of several variables on the efficiency of the load transfer through an expansion joint in plain concrete pavement system under the influence of the static wheel load. The variables that have been addressed are the diameter of dowel bar (12, 16 and 20 mm), subgrade soil type...

This paper deals with load-deflection behavior the jointed plain concrete pavement system using steel dowel bars as a mechanism to transmit load across the expansion joints. Experimentally, four models of the jointed plain concrete pavement system were made, each model consists of two slabs of plain concrete that connected together across expansion...

This paper deals with load-deflection behavior the jointed plain concrete pavement system using steel dowel bars as a mechanism to transmit load across the expansion joints. Experimentally, four models of the jointed plain concrete pavement system were made, each model consists of two slabs of plain concrete that connected together across expansion...

This paper presents an experimental investigation consists of casting and testing in shear seven rectangular simply supported reinforced concrete beams. Two of the tested beams are made with reactive powder concrete (RPC) without coarse aggregate and five with reactive powder concrete with coarse aggregate which is called modified reactive powder c...

This paper presents an experimental investigation on shear behavior of GFRP reinforced high strength concrete beams externally strengthened in shear using CFRP with various configurations: full side sheets, U-strips, vertical side strips and diagonal side strips; and three steel fiber ratios (0%, 0.5% and 1%). Results show that using GFRP bars as t...

An experimental investigation was conducted to investigate the behavior of ultra-high strength modified reactive concrete (MRPC) columns before and after strengthening with carbon fiber reinforced polymer (CFRP) sheets jacketing under eccentric axial load. Twelve columns were tested up to failure, strengthened and retested in order to examine stren...

This paper presents an experimental investigation on the flexural behavior of reinforced concrete slabs under one way bending. Sixteen simply supported slabs of dimensions 1000mm×450mm×50 or 70mm were manufactured and tested. Twelve slabs were constructed using self compacting concrete (SCC) and four using conventional concrete (CC). Four variables...

This paper presents an experimental investigation consisting of casting and testing in flexure twenty four rectangular simply supported reinforced concrete beams.Three of the tested beams are made with conventional concrete (CC), five with reactive powder concrete (RPC) and sixteen as hybrid beams of the two concretes. RPC is used in tension in ten...

This paper presents an experimental investigation consist of casting and testing of twenty four rectangular simply supported reinforced concrete beams. Three of the tested beams were made with conventional concrete (CC), five with reactive powder concrete (RPC) and sixteen as hybrid beams of the two types of concrete. RPC is used in tension zone (a...

This paper presents investigation on the strength and deformation characteristics of reinforced normal and high strength concrete rectangular beams failed in shear and repaired by epoxy injection. Eight simply supported reinforced concrete beams without shear reinforcement are tested, four of which are made with normal-strength concrete (NSC) and f...