Mustaqqim Abdul Rahim
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Preferred name
Mustaqqim Abdul Rahim
Official Name
Mustaqqim, Abdul Rahim
Alternative Name
Abdul Rahim, Mustaqqim
Abdul Rahim, M.
Rahim, Mustaqim Abdul
Rahim, M. Abdul
Mustaqqim, Abdul Rahim
Rahim, Mustaqqim Abdul
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Scopus Author ID
56353069700
Researcher ID
IRA-4259-2023

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Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab

2022-07-18 , Shamshinar Salehuddin , Zaini S.S. , Johari M.A.M. , Nur Liza Rahim , Mustaqqim Abdul Rahim

The use of reinforced concrete flat slabs in building construction increases the floor-to-floor clearance, expedites site operations, and offers aesthetically rewarding features. However, punching shear failure in a flat slab is brittle in nature and can be potentially catastrophic. Many studies have been conducted to improve the punching shear capacity of flat slabs but some of the proposed punching shear reinforcements were complicated and costly. This research aimed to evaluate the effectiveness of a simple and cost-effective; truss-shaped punching shear reinforcement embedded in a 1200 mm × 1200 mm × 175 mm thick flat slab specimen. Three types of truss-shaped punching shear reinforcements were prepared. All specimens were supported at the edges and subjected to gravity load tests. The results showed that the introduction of truss-shaped punching shear reinforcement increased the punching shear capacity in the range of 7.71% to 21.47%. The maximum deflection of these specimens exhibited an insignificant increase compared to the control specimen, suggesting that punching failure governed the ultimate behavior. The additional strength offered by truss-shaped punching shear reinforcement makes flat slabs as a construction material more appealing because they allow them to withstand higher design loads.

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The Behavior of Non-Destructive Test for Different Grade of Concrete

2020-12-28 , Mustaqqim Abdul Rahim , Mohd Shahidan Shaari , Onn L.C. , Saiful Bahari N.A.A. , Rahman N.A. , Afizah Ayob

Rebound hammer tests are generally preferred as a non-destructive testing method as compared to destructive testing methods such as compression tests. In this study, a general series of rebound hammer tests and destructive tests were carried on in a heavy concrete laboratory. A set of concrete cubes measuring 100 x 100 x 100 mm were cast and subjected to water curing for 7, 14 and 28 days to obtain the cube strength and rebound number. Three grades of concrete, namely M20, M25 and M30 were used in this experiment. At 28 days, the minimum target strength should be 30 MPa. The rebound hammer tests were conducted before the compression tests. The data obtained for each test was evaluated and tabulated in the findings of this study. It was found that the variation between predicted strength and experimental strength for the rebound hammer test was 0.18%. This indicates that the rebound hammer test is able to predict strength with acceptable accuracy.

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Exploring the Properties of Mortar Containing Incineration Fly Ash

2021-11-26 , Norlia Mohamad Ibrahim , Rohaya Abdul Malek , Nur Liza Rahim , Mustaqqim Abdul Rahim , Roshazita Che Amat , Syakirah Afiza Mohammed , Badri N.A.

Fly Ash (FA) is one of the waste materials generated from the combustion of solid waste through incinerator and contains hazardous substances. Further treatment to the ash needs to be done to avoid further environmental destruction. As an alternative solution for this problem, FA is used as a replacement material for cement in the mortar. The main objective of this study is to explore the potential use of FA as partial replacement of cement in mortar. The percentage of FA used to replace the cement in this study is 0%, 5%, 10%, 15% and 20%. Several important tests were conducted to identify main properties of the mortar such as compressive strength, water absorption, density and ultra-pulse velocity. Mortar containing 15% of fly ash has the highest of compression strength which is 35 MPa after 28 days. Besides, the mortar containing 5% of fly ash has the highest result of water absorption test and density test whereas mortar containing 20% of fly ash has the highest value for pulse velocity after 28 days. Thus, mortar containing fly ash has good physical and mechanical properties.

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