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Khairulazman, Nurul Afiffah
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Mineralogical analysis of plutonic and volcanic rocks at selected slope sections of the Kuala Lumpur-Karak Highway Khairulazman, Nurul Afiffah; Jelani, Jestin; Suif, Zuliziana; Umor, Mohd Rozi; Azmi, Nur Anati; Md Yusof, Zainuddin; Ahmad, Nordila; Abd Halim, Abd Akram Haikal; Rosle, Qalam A’zad
SINERGI Vol 29, No 1 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.1.024

Abstract

The Kuala Lumpur-Karak Highway (KL-KH) is a key route connecting Kuala Lumpur to the East Coast states of Peninsular Malaysia. It passes through three distinct geological formations: the Kuala Lumpur Granite, Genting Sempah Complex, and Bentong Raub Suture Zone. These formations feature unique rock mineral compositions and microstructures that influence the strength and behavior of rock masses. This study used X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) to analyze the mineralogical properties of plutonic and volcanic rock samples from the highway. The plutonic sample from KM29 (GKM29) consists of quartz, muscovite, and albite, while the volcanic sample from KM93 (LKM93) is rhyolite, containing quartz, albite, muscovite, and biotite. While both samples share similar minerals, they differ in texture, mineral proportions, and carbon content. The GKM29 sample has a more granular texture, while the LKM93 sample is finer. These differences in mineral composition and texture affect the mechanical properties of the rocks, including strength and durability, which are crucial for slope stability. Understanding these variations is essential for assessing slope stability and potential geological hazards along the highway. This study emphasizes the importance of early geological assessments for effective slope management and road safety, enabling better planning and maintenance strategies.
Experimental study of rainfall intensity on silty sand slope Jelani, Jestin; Suif, Zuliziana; Ahmad, Nordila; Muhammad Sadiq Rabbani, Muhammad Jazil Rabbani; Khairulazman, Nurul Afiffah
SINERGI Vol 29, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.2.024

Abstract

Malaysia, located in the tropical region, is blessed with an abundance of rainfall, particularly during the monsoon season. Previous studies have shown that major landslide occurrences in Malaysia are primarily caused by frequent and prolonged rainfall. This study is conducted to investigate the effect of different rainfall intensities on the silty sandy slope through a small-scale slope model. The soil samples were collected from Bukit Tabur, Kuala Lumpur, Malaysia, to construct a 60° slope model. A continuous rainfall intensity of 50, 100, and 150 mm/hour was considered in the study to determine the type and duration of failure. Two cameras were positioned at the front and side of the slope model to capture the elapsed time since the onset of rainfall. The gullies failures were observed in all experiments. It is due to the soil on the slope surface reaching nearly full saturation, causing runoff water to move down the slope and drain downstream, resulting in surface erosion. Such a failure mechanism agreed well with the failures (formed gullies) recorded on the downstream slope of the Bukit Tabor after high-intensity rainfalls. The time of failure for different rainfall intensities was compared to the highest rainfall intensity. The duration of slope failure for 50 mm/hr and 100 mm/hr is approximately 30% and 5% slower than that of rainfall intensity at 150 mm/hr. The results suggest that the slope is more prone to failure with higher rainfall intensities. 
Co-Authors Abd Halim, Abd Akram Haikal Ahmad, Nordila Azmi, Nur Anati Jelani, Jestin Md Yusof, Zainuddin Muhammad Sadiq Rabbani, Muhammad Jazil Rabbani Rosle, Qalam A’zad Suif, Zuliziana Umor, Mohd Rozi