Pusat Pengajian Kejuruteraan Awam - Tesis

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Performance evaluation of steel slag as natural aggregates replacement in asphaltic concrete
(2008-11-01)
Teoh, Cherh Yi
Steel slag is one of the industry wastes engineered into road construction material. This study was carried out to evaluate the performance of steel slag aggregates as road construction material and its performance compared to granite aggregates. The steel slag aggregates were tested for its physical and mechanical properties. Two dense mix designs incorporating penetration grade 80/100 bitumen and one porous mix design incorporating penetration grade 60/70 bitumen were used to produce the specimens for testing. The dense mix specimens are referred to as 100% Steel Slag Dense Asphalt (SSDA) and 50% Steel Slag 50% Granite Dense Asphalt (SSGDA) while the porous mix specimens are referred to as Steel Slag Porous Asphalt (SSPA). During the first phase of the study, SSDA and SSGDA were tested for performance evaluation through resilient modulus, dynamic creep, Marshall stability and indirect tensile strength. Apart from the tests stated (except for indirect tensile strength), SSPA were also tested for abrasion loss and water permeability. In the second phase of the study, the same tests as those carried out in the first phase were carried out on aged specimens. Resistant against permanent deformation and low temperature cracking improved after aging for both dense mixes and porousmixes. Test results revealed that steel slag inhibits great potential as road construction material.
Fuzzy logic-ordered weighted average model for effective municipal solid waste landfill site selection using comprehensive spatial environmental, physical and socio-economic criteria
(2018-01-01)
Ahmad, Siti Zubaidah
In Malaysia, the landfill method of municipal solid waste disposal is still the most popular due to its economic, easiness and technological ability. However, the process of opening new landfill requires tedious planning decision with regard to identifying the suitable sites. Even though the current landfill site selection (LSS) procedures in the National Strategic Plan for Solid Waste Management (NSPSWM) guidelines had specify the mitigation measures to be followed, the restrictions on the appropriateness of suitable sites for new landfill had not been deliberated comprehensively. The guidelines have not distinctly characterized the constraints or criteria for the site suitability problem as prescribed by the local Enviromental Impact assessment (EIA) guidelines.
Influence Of Palm Oil Fuel Ash As Supplementary Binder On Properties Of Polymer Modified Concrete
(2014-03)
Zakaria, Nurhana
Malaysia being the second largest world's palm oil producer has led to the mounting up of the waste produced from this industry and has caused environmental problem. Palm Oil Fuel Ash (POFA) is an agricultural waste from palm oil mill that has been proven to have pozzolanic properties which can enhance the properties of concrete when used as supplementary cementitious material in concrete. POFA used in this research was processed by means of sieving, grinding and subjecting it to heat treatment of 500±50°C for l hour before undergoing the second grinding stage. The raw and processed POFA were characterized to confirm its pozzolanic characteristics. Previous researchers have recommended the use of POFA in concrete especially for strength enhancement. The use of SBR as polymer modifier in concrete has been introduced since long time ago. Although the addition of polymer modifier in concrete improved its durability properties, however, it did not enhance the compressive strength of the concrete significantly. The main objective of this research is to observe the effect of using POFA as partial cement replacement on the engineering and transport properties of Polymer Modified Concrete (PMC).
Leakage Impact On Non Revenue Water (Nrw) In Sungai Petani (Kedah Tengah District), Kedah Darul Aman
(2014-03)
Mohamad Saad, Mohd Zaidi
Leakage is well known as the main reason of high physical loss in non-revenue water (NRW) and is divided into major and minor leakages. A leakage study was done in 10 District Meter Zones (DMZs) in Sungai Petani, Kedah. NRW data had been collected in cooperation with Syarikat Air Darul Aman (SADA). Data taken from year 2008 until2012 were used to investigate the major and minor leakages by doing visual inspection at site and analysis of the results were done. The baseline inflow and baseline average water consumption in cubic meter per day were collected from the Primayer 'data logger' and SADA billing systems to determine the real water losses. Statistical analysis were used to study the relationship between number of leakage with NRW cost saving, number of connection and length of pipe by using the Statistical Product and Service Solution (SPSS).
Performance Of Fire-Damaged Reinforced Concrete Rectangular Columns Retrofitted With Fiber Reinforced Polymer Composites
(2014-12)
Moghtadernejad, Nima
In this experimental study, a total of twenty-one rectangular RC columns have been prepared and tested under axial compression test in three groups: un-heated, heated, heated-and-repaired with FRP. The objectives of the study were firstly to study the effect of fire temperature at 500°C and 600°C on the compressive strength and secant axial stiffness; and secondly to study the effect of repairing with GFRP and CFRP including the number of layers on improvement in compressive strength and axial stiffness, of RC columns. The RC columns were exposed to fire with the method of steady-state test under temperatures of 500°C and 600°C. The heated RC columns were repaired with unidirectional CFRP and GFRP jackets in one and two layers for the purpose of investigating the improvement in the compressive strength and the secant axial stiffness of the rectangular RC columns. The experimental results show that the residual compressive strength of RC columns were 43.1 % and 34% of the compressive strength of un-heated RC columns after being exposed to temperatures of 500°C and 600°C, respectively.

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