Pusat Pengajian Kejuruteraan Awam - Tesis
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- PublicationFuzzy 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 ZubaidahIn 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.
- PublicationInfluence Of Palm Oil Fuel Ash As Supplementary Binder On Properties Of Polymer Modified Concrete(2014-03)Zakaria, NurhanaMalaysia 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).
- PublicationLeakage Impact On Non Revenue Water (Nrw) In Sungai Petani (Kedah Tengah District), Kedah Darul Aman(2014-03)Mohamad Saad, Mohd ZaidiLeakage 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).
- PublicationPerformance Of Fire-Damaged Reinforced Concrete Rectangular Columns Retrofitted With Fiber Reinforced Polymer Composites(2014-12)Moghtadernejad, NimaIn 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.
- PublicationEffect of the slenderness ratio on masonry wall under axial compressive cyclic loading(2014-07-01)Wan Ibrahim, Wan RohaninaSlenderness ratio is one of the factors affecting the capasity of masonry wall to resist compressive loading. Masonry wall structure is able to withstand compression load but having the large live to dead load ratio would impair the structure capability to withstand cycles of repeated loading and unloading condition. When the masonry structure is exposed to this combined factor, it is desirable to investigate the effect of the slenderness ratio on masonry wall subjected to cyclic compressive loading. In this study, twelve specimens of single leaf wall had been tested under monotonic and cyclic compressive loading with different height representing three different slenderness ratios. From this study the strees-strain curve of the monotonic and cyclic load test was obtained and the relationship between the compressive strenght and slenderness ratio of the masonry wall had been evaluated. It was observed that the masonry wall subjected to the cyclic compressive load behave as expected whereas the strength of the wall was decreased as the slenderness ratio increased and the cyclic loading pattern did not show significant effect. Meanwhile the stress-strain curves of cyclic test generally showed good agreement with the curves of the monotonically loaded specimens. This study also investigates the masonry wall strength subjected to compressive loading in relation to slenderness ratio effect using numerical modelling analysis, it was concluded that the analysis perfomed satisfactorily with poor accuracy and the vertically loaded wall under cyclic load test exhibited face-shell spalling and vertical cracking through the web and face shell and for the increasing the wall slenderness ratio, the wall chipping break about the middle of the wall due to buckling.