Roslli Noor Mohamed

Universiti Teknologi Malaysia | UTM · Department of Structure and Materials

Investigating fluctuation in thermal loads is essential to understand the imposed deformations and stresses within structural elements. These deformations and stresses must be within the allowable limits to avoid structural failure or serviceability defects. The shrinkage and creep of the concrete impose additional stresses on all concrete elements...

Investigating fluctuation in thermal loads is essential to understand the imposed deformations and stresses within structural elements. These deformations and stresses must be within the allowable limits to avoid structural failure or serviceability defects. The shrinkage and creep of the concrete impose additional stresses on all concrete elements...

This paper analyses the field test results for three concrete slabs poured in UAE to define the thermal response within the test period including the hourly environment temperature fluctuations and correlated lateral thermal deformations. Time-dependent properties (TDP) and non-time dependent properties (NTDP) ETABS finite element models are genera...

Steel fibre reinforced self-compacting concrete (SFRSCC) consolidates under its own weight and has been shown to have the ability to provide an efficient reinforcement mechanism. The concrete with an adequate amount of steel fibre might increase the load and deformation capacities of the structural elements, particularly the tension dominant member...

Concrete buildings are subjected to fluctuation in seasonal temperature loads between summer and winter in the Arabic area. The long-term effects of such temperatures on concrete buildings, accompanied by the variation in ambient temperatures, induce thermal displacements and forces in concrete structures. The thermal forces and displacements influ...

The Arabic area is known for its significant changes in climate temperatures within different seasons. Riyadh, Cairo, Abu Dhabi, Ras Al-Khaimah, Kuwait, and Baghdad are subjected to the maximum variance in daily temperatures and presents the mean values of daily temperatures considering the data collected by the Hong Kong observatory in China for t...

In this paper, there will be an analysis study to figure out the impact of the environment thermal loads, shrinkage and creep at multi-storeies reinforced concrete frame buildings in the Arabic area. Etabs models will be prepared based on NTDP and TDP of ordinary concrete, considering two columns heights as 3m and 6m, and two supports conditions as...

Research on the bond behaviour between deformed steel bars and the Self-Compacting Concrete (SCC) has been conducted extensively. However, bond study using the high-strength SCC (HSSCC) added with steel fibres is still rare and has not been fully explored. Therefore, in this study, experimental works were carried out to investigate the effects of a...

Palm oil clinker (POC) is a waste from the production process of palm oil, a hard and porous materials. Many studies have focused on the effect of POC use on strength while this study discusses the ability of POC in concrete to absorb sound and its relationship with concrete properties. The study was done by replacing natural river sand in stages o...

Effects of different surface textures on the interface shear strength, interface slip, and failure modes of the concrete-to-concrete bond are examined through finite element numerical model and experimental methods in the presence of the horizontal load with ‘push-off’ technique under different normal stresses. Three different surface textures are...

Concrete filled steel tube (CFST) column is a composite member comprising of structural hollow steel tube and concrete core. This paper evaluates the effect of fly ash (FA) and silica fume (SF) on square CFST stub columns’ behavior under concentric loading. The self-compacting concrete (SCC) grade used is M60 with the addition of 50% FA and 10% SF...

Experimental research on the performance of fly ash and silica fume selfcompacting concrete filled steel tube (FSS CFST) stub columns under axial compression were conducted. The main parameters varied in the tests are steel tube’s diameter to thickness ratio, D/t (from 20 to 33), and yield strength (from 275.83 MPa to 350.51 MPa). The self-compacti...

A complex geometry of precast reinforced concrete half-joint beams has resulted from the high shear force at the recessed ends of such beams. Immense levels of reinforcements are provided close to the re-entrant corner of these beams to prevent the propagation of diagonal cracks and sudden failure. However, this condition leads to reinforcement con...

The application of flat slab in construction offers a good deal, whereby the elimination of beam could reduce the overall height of the building and self-weight of structure. However, a drawback is that a high concentration of shear forces and bending moments at the column peripheries are produced, which cause punching shear failure. Previous resea...

The paper focused on the feasibility of substituting the ordinary Portland cement with waste supplementary cementing materials (SCMs) that is, fly ash (FA) and silica fume (SF). The aim is to improve the compressive strength of self-compacting high-performance concrete (SCHPC) and to find environmentally friendly and economical application of the a...

The end region of the dapped-end beam experienced multiaxial stress actions, which requires high amounts of reinforcement and this resulted to the closely space reinforcement. Therefore, hooked-end steel fibres were mixed into all beam specimens to partly replace the secondary shear and bursting reinforcement to reduce the congestion issue. A serie...

This research mainly focuses on the pullout behaviour of different ribbed bars size embedded in plain Self-Compacting Concrete (SCC) and also in SCC with Steel Fibers (SCCSF). The diameter of the ribbed bars was 12, 16 and 20 mm. The steel fibers used in this study were the hooked end type with 35 mm length and an aspect ratio of 63.6. This study a...

Earthquake is one of the natural disaster that cannot be avoided and could give great impact to the world and living things on it. Malaysia is located nearby two seismically active plate boundaries which are between Indo-Australian and Eurasian Plate on the west and between Eurasian and Philippine Plate on the east. Earthquake that happen along the...

This paper presents the results of experimental work on the mechanical properties of self-compacting high-performance concrete (SCHPC) containing fly ash (FA) and silica fume (SF). The paper focused on the feasibility of substituting the ordinary Portland cement with waste supplementary cementing materials to decrease the abundant disposal of FA li...

Purpose The purpose of this paper is to examine the mechanical properties, material composition of spent garnet as a sand replacement in high-strength concrete at room and elevated temperatures. Bonding of the concrete containing spent garnet and reinforcing rebar is investigated. Moreover, the optimum thickness of concrete cover subjected to eleva...

Concrete cover plays an important role in protecting the reinforcement from harmful environments and high temperatures. In this study, the effects of the concrete cover containing garnet and rebar prepared with cover thicknesses of 20 and 30 mm and subjected to temperatures of 20°C, 200°C, 400°C, 600°C and 800°C for 1-hour duration were determined...

This study involves the investigation of the effects of steel fibre content volume on the biaxial stress behaviour of steel fibre self-compacting concrete (SFSCC) at different stress ratios. This study covers compression-compression, compression-tension, and tension-tension stress regions. The results are discussed in terms of the uniaxial and biax...

Noise pollution from traffic is an increasing environmental problem worldwide. The most popular mitigation measure is the control of path by means of construction of noise barriers. Current concrete barrier incorporated with perforated surface infilled with non-mineral fibre sound absorbing material on the highway side are the commonly found. The d...

Wavelet Transforms (WT) have been receiving an increasing attention for the detection of damage in structures based on vibration response. The existence of the problem of boundary distortion in WT may lead to unreliable results at and around the boundaries of the structure. Previous studies have applied methods such as signal extension, zero paddin...

Ever since Self-Compacting Concrete (SCC) was introduced, various attempts have been made to further enhance its quality and robustness. The addition of steel fibers into the SCC mix is found to have increased the hardened properties of concrete. However, it is also acknowledged that the addition of steel fibers into the fresh SCC mix poses a negat...

This paper presents the experimental results and theoretical study on the shear strength of reinforced steel fibre concrete beams. Failure of reinforced concrete beams in form of diagonal tension failure has been very complex to predict accurately. The inclusion of steel fibre substantially increased the ductility of the concrete and improves the s...

Durability has become one of the major indicators to dictate a good quality of concrete. Rapid growing in construction leads to the demand of high strength concrete which can bear high stress and high resistance towards any hazard and harsh environment thus providing a safe structure. High performance concrete (HPC) has been identified as one of th...

This paper provides general overview on the development of biaxial behaviour of plain concrete and steel fibre reinforced concrete (SFRC) under various types of loading conditions, namely, biaxial compression, biaxial tension-compression and biaxial tension. The biaxial behaviour including failure envelope, ultimate strength, failure mode and stres...

This paper presents the physical and mechanical performance of steel fibre reinforced self-compacting concrete (SFRSCC) using fly ash as cement replacement at 30% by weight of cement. It is understood that the weakness of concrete is the tensile resistance which is can be improve with the addition of steel fibre. This paper deals with the medium co...

This paper presents the findings of an experimental data on the effects of inclined shearreinforcement in reinforced concrete (RC) beam. Two types of shear reinforcement of RC beamwere investigated, conventional stirrups (vertical links) and inclined shear reinforcement (45degrees of inclined shear reinforcement). The RC beam with conventional stir...

Lightweight concrete (LWC) has been identified as an innovative technique for construction purposes. Lightweight concrete can be categorized into three different types which are no-fine aggregate concrete, lightweight aggregate concrete and aerated concrete. This paper studied the characteristic of the lightweight concrete in term of mechanical pro...

The bent-up bars have not been used as shear reinforcement in beams since the past 40 years or so. In all cases of design and construction nowadays, shear forces are resisted by vertical links only. Some complications in installing the multiple set of bent-up bars, the less opportunity to have sufficient number of bent-up bars due to small number o...

Self-compacting lightweight concrete (SCLWC) is an innovative high performance concrete which uses palm oil clinker (POC), a waste by-product from the palm oil industry, as the lightweight aggregates. This paper presents a research on the effects of utilising only POC as coarse aggregates on the fresh and hardened properties of SCLWC. Properties of...

This paper presents an experimental test program that was carried out to investigate the shear performance of steel fibre self-compacting concrete (SFSCC) beams. In this paper, the mechanical performance of results from all mixtures used to cast normal concrete (NC), self-compacting concrete (SCC) and steel fibre self-compacting concrete (SFSCC) we...

Grouted connections are defined as the system used to join steel rebars available in precast components by means of grouting the splice sleeve and steel rebars together. The bond between the infill material and the steel bar is the key factor that governs the capacity and the performance of the connection. This study was carried out to investigate...

Precast concrete building system has gained its popularity in Malaysia because of the many advantages such as high quality of structural components, less labour intensive at the construction site, and shorter completion time of a project. One of the constraints in precast concrete structures is to ensure that the connections are strong enough to en...

Many structural failures in precast concrete buildings are initiated by connection failures. To avoid such failures, the connections should have enough strength to join the reinforcement bars between precast concrete panels. This paper presents the structural performance and behaviour of a proposed splice sleeve connection using generic steel pipe....

The application of self-compacting concrete (SCC) in speeding the development of construction technology has become a growing trend due to its known advantages. It is now well established since it has three significant properties which are flowing or filling ability, passing ability and segregation resistance as the main self-compactability charact...

This paper present the results of combined bending and shear test on composite slabs reinforced with steel fibres in-situ concrete topping. The mechanical properties of steel fibre reinforced concretes (SFRCs) were first determined by varying the fibre dosage from 0% to 1.25%. The result shows that there was not much improvement on the SFRC propert...