Aizat Mohd Taib

Universiti Kebangsaan Malaysia | ukm · Department of Civil Engineering

Currently, there are many natural disasters such as floods, landslides, earthquakes, and climate change. These disasters certainly affect the conditions of human life from economic, social, and environmental perspectives. Therefore, it is necessary to take preventive action and learn so that people understand the potential for disasters and how to...

Landslides have been classified as the most dangerous threat around the world, causing huge damage to properties and loss of life. Increased human activity in landslide-prone areas has been a major contributor to the risk of landslide occurrences. Therefore, machine learning has been used in landslide studies to develop a landslide predictive model...

Malaysia has experienced a number of slope failures in the past and vegetation is one of the solutions that can help to increase the stability of slopes by preventing erosion and provide interlocking forces in the soil materials. This study investigates the effect of vegetation on riverbank slope stability in Malaysia. The analysis was conducted to...

Soil slope instability is a grave concern in regions with high annual precipitation, especially in tropical countries. The impact of soil instability on the economies of these countries is severe since it usually causes fatalities and property loss. The research and development of the systems to reduce the impact of soil slope failures by predictin...

Along with sea-level rise, one of the most detrimental effects of climate change, is salinity leakage, it significantly affects agricultural activities throughout most of the world. This occurrence is becoming increasingly dangerous. The purpose of this study was to use Geographic Information Systems (GIS) to assess the current situation of agricul...

Soil erosion is a captious environmental problem in regions of hot tropical climates, causing loss of land and natural disasters such as river sedimentation, flooding, and slope failures. Based on soil properties and their response to erosion agents, efforts have been made to develop simplified models and indices for the estimation of erosion. ROM...

The presence of isolated or clustered granite boulders in tropical weathered masses commonly formed a very thick heterogeneous zone in weathering Zone 3 to 5. The boulders with various characteristics are always misinterpreted during the geotechnical design process due to being poorly understood and studied. This study aims to determine the physico...

The soil erodibility (K) factor is one of the key parameters used for predicting and estimating soil erosion in models such as Universal Soil Loss Equation (USLE) and Modified Universal Soil Loss Equation (RUSLE). It is the inherent resistance of soil to survive erosion and reflects the susceptibility of soil to the erosion process. Long-term studi...

Biogeotechnology is a subfield of geotechnical engineering that utilizes microbial approaches to improve the engineering parameters of soil. The use of biological processes in the soil reclamation process shows great potential in terms of sustainability and environmental friendly compared to treatment using chemicals such as cement and lime. These...

Coffee is currently one of the most prized food commodities. Its production has grown so much in recent times, however, the waste by-products generated are also huge. It is envisioned that with rapid urbanization and construction, the use of these by-products can offset the demand for construction materials such as cement and concrete. It is now ge...

Soil erosion seriously threatens environmental sustainability, affecting water quality and quantity, urban infrastructure, soil fertility and productivity, and forestry. Several empirical- and physical-based models have been developed to estimate soil erosion. Soil erodibility is one of the key factors used in these models for the assessment of soi...

Finding alternatives to natural resources is important for a sustainable future and is essential to infrastructure projects. Among these replacements is the use of coffee waste as soil stabilizers. Coffee husk ash (CHA) is a solid waste obtained by the processing of coffee beans on a farm or factory. The main aim of this study is to determine the g...

This paper analyses experimental data on sediment incipient motion with varying sediment bed thickness (of d50, 5, 10 and 24 mm). Sediment particles (with sizes ranging from 0.5 mm to 4.78 mm) were used to evaluate the effect of deposited bed. Variation of shear velocity estimation was investigated where the critical Shields parameter was expressed...

Uniaxial compressive strength (UCS) is one of the most widely used strength parameters in geotechnical design. The value is obtained through direct testing method, carried out through careful procedures of testing in a laboratory setting. As such, it is relatively more expensive, more tedious and requires longer time to complete. Considering that U...

The assessment of soil erosion risk has been widely studied, and various methods have been established. However, most of the methods require extensive field and laboratory works that are time-consuming. The previous literature mainly focused on utilizing the existed empirical models like USLE and its derivatives. The establishment of empirical corr...

This study determines the effectiveness of horizontal drains on a slope which refers to a landslide at Putrajaya, Malaysia, in 2007. The incident buried 27 cars, and about 1200 people were transferred to a safe place. The main cause was identified as continuous and heavy rainfall. In Malaysia, abundant rainfall is common during the wet season. Ther...

Spectral analysis of surface wave (SASW) method for in-situ non-destructive testing of stiffness profiles of soil and pavement sites have undergone various improvements since its inception during the 1980s. Improvements have been in both data-acquisition (sampling and sensors) as well as in data-processing (forward calculation and inversion algorit...

Locating hard layers or bedrock is particularly important in deep subsurface exploration. However, due to the scale effect of conventional testing, it is sometimes difficult to provide a greater overview of the subsurface conditions. This motivates a method that is capable of providing better resolution to a certain depth. This paper presents an in...

The study was carried out to produce an advisory system based on the blackspot accidents mapping at the North-South Expressway (NSE). Blackspots are location where the road traffic crashes have historically concentrated by type of accident in which the accident caused fatalities, severe injuries, minor injuries and damage. This research aims to ide...

The main cause of problematic soil failure under a certain load is due to low bearing capacity and excessive settlement. With a growing interest in employing shallow foundation to support heavy structures, it is important to study the soil improvement techniques. The technique of using geosynthetic reinforcement is commonly applied over the last fe...

Graphical abstract Abstract Several methods can be used to model pavement structures, namely multi-layered elastic theory (MET), finite element method (FEM), or finite difference method (FDM). In this study, three computer programs, KENLAYER and EVERSTRESS 5.0 which are based on MET, and ANSYS, representing the FEM, are used in Falling Weight Defle...

The use of recycled crumb rubber (CR) in asphalt pavements could be an essential step towards ensuring a more sustainable future in addition to opening a new investment opportunity for global investors. Asphalt modifers have the ability to enhance the performance of fexible pavements and contribute towards ensuring a more sustainable environment. T...

The climate of Malaysia, which is hot and humid, has a great impact on soil-root interaction. This study aims to determine the influence of soil-root interaction in slopes, which is calculated in the form of factor of safety. A numerical slope model is studied with Vetiver grass (Vetiveria Zizanioides sp.) as the vegetative cover at a residential p...

During welding process of shear studs connectors, some were unintendedly welded with a certain degree of inclined angle. The inclined shear studs may not sufficient to transfer sufficient forces to the surrounding concrete in order to have complete composite actions. Therefore the main aim of this study is to investigate the shear transfer mechanis...

Several methods can be used to model pavement structures, namely multi-layered elastic theory (MET), finite element method (FEM), or finite difference method (FDM). In this study, three computer programs, KENLAYER and EVERSTRESS 5.0 which are based on MET, and ANSYS, representing the FEM, are used in Falling Weight Deflectometer (FWD) test on a pav...

One of the most frequently used waste materials is reclaimed asphalt pavement (RAP). The use of RAP can help reduce the cost of a project and ensure that the project is eco-friendly. Therefore, the aim of this study is to give a detailed description of the production of RAP to ensure that the rehabilitation and maintenance of pavements as well as t...

The rapid population growth of Kajang town and the increase in the number of vehicles have caused an increase in the daily trips made on most streets and at the intersections of the town, especially during peak hours. This has worsened the traffic congestion on the road networks. This study aims to evaluate the existing level of service (LOS) and c...

Rapid urbanisation and the increase in population has led to massive use of underground spaces, especially in the city. Before an underground structure is built, the use of retaining structure is crucial in order to prevent the excavation from failure. Diaphragm wall is a widely used retaining structure, particularly for deep excavation. A holistic...

Nowadays, a large amount of municipal solid waste (MSW) is generated due to the rapid urbanisation in developing countries leads to the demand for larger and higher capacity landfills. Bioreactor landfill technology has been introduced to accelerate the stability of landfill and to solve the issue of limited landfill area. However, the accelerated...

Deep basement construction has always been extensively constructed in urban areas especially in Kuala Lumpur where the area is dense and limited. The design of basement retaining wall and its support system involves careful analysis, design and monitoring system. The focus in this study is to model the actual cases on site by using Finite Element S...

Knowledge in modelling unsaturated slope behaviour remains limited. Research findings have challenged the common assumption of fully saturated conditions for all soil problems thus widening the perspective of partially saturated states. The calibration of unsaturated soil parameters requires good understanding of the soil-water characteristic curve...