Azman Mohamed - Academia.edu (original) (raw)
Papers by Azman Mohamed
Bilge International Journal of Science and Technology Research
The use of recovered asphalt pavement can reduce the amount of new bitumen and aggregates used in... more The use of recovered asphalt pavement can reduce the amount of new bitumen and aggregates used in pavement construction and rehabilitation (RAP). RAP is a waste product that results from the removal of an old or damaged pavement surface. Although it has been used since the 1970s, and numerous recommendations for using RAP in the new mixture have been made, there are only a few research available. Because the materials used are recycled, it is also cost-effective and environmentally friendly. The purpose of this study is to characterize soil that has been blended with reclaimed asphalt pavement (RAP) for use on the local road shoulder. RAP is one of the rehabilitation procedures used to repair a deteriorated surface by removing the upper pavement and replacing it with new pavement. According to earlier study, mixing dirt with different materials improves the finding. The goals of this study are to establish the material qualities of soil and RAP, determine the optimum moisture conten...
Journal of Building Engineering
Physics and Chemistry of the Earth, Parts A/B/C
Implementation of Project Based Learning (PtBL) in Universiti Teknologi Malaysia (UTM) as part of... more Implementation of Project Based Learning (PtBL) in Universiti Teknologi Malaysia (UTM) as part of Outcome Based Education (OBE) framework have faced various challenges (i.e revamp on the undergraduate co-curricullum, required high commitments from academicians & faculty and facilities to cater PtBL activities). This paper discusses the effectiveness of PtBL teaching method in an effort to develop the students’ soft skills in tandem with the technical or professional competencies; and problems, challenges and potential improvement in the course. The Survey Camp course which is offered at year one of a four years civil engineering degree programme in the Faculty of Civil Engineering (FKA), UTM was chosen for this study. It is a ten days fieldwork in which the students will carry out an engineering survey project from field to finish in groups of five to six students supervised by the academic staff. Assessment of the technical aspects was based on the students ability to meet the minimum engineering surveying’s standard whereas the assesment of soft skills was conducted during various sessions of the survey projects. Survey questionaires were given at the beginning and the end of the course as part of evaluation of the course effectiveness. The research has found that the technical aspects were achievable though with lesser degree for the engineering design. However, on the soft skills, students demonstrated an overall improvement of competency but it was difficult to determine the levels for the average students while the best and poor performers were easily observed.
Advanced Science Letters, 2018
Housing industry is one of the main drivers in nation development. The Malaysian government is ac... more Housing industry is one of the main drivers in nation development. The Malaysian government is actively promoting policies to ensure quality and affordable houses to all nations. Thus, this scenario shows that sustainability is becoming prominent in Malaysian housing industry. This concept was recently introduced in Malaysia; however, there is a lack of interest among industry stakeholders. This paper discusses a research that identified the challenges of implementing sustainability in Malaysian housing industry by, firstly, understanding the issues related. Semi-structured interview approach is employed to few housing developers in the southern region of Malaysia due to the concept is still new and fewer implementations in the industry. Through the interviews, industry stakeholders provide their different views on the barriers of implementing sustainability and strategies to promote sustainable housing in Malaysia. Findings of the interviews help in increasing awareness of industry stakeholders about the importance of sustainable concept in housing development.
Journal of Advanced Civil and Environmental Engineering, 2020
Internal friction angle (φ) is one of the important parameter in a foundation engineering, especi... more Internal friction angle (φ) is one of the important parameter in a foundation engineering, especially in the stress distribution event. The higher value of the internal friction angle shows the higher of the material can withstand the lateral force. Cohesion factor (c) is also an integral part of the shear strength for the foundation material. In the granular soil such as sand or non-cohesive material, including aggregate, cohesion value usually assumed as zero, although some cohesion factor may be applied. In this research, two different materials were tested for their shear strength. The materials were Natural Crushed Aggregate (NCA) and Recycled Concrete Aggregate (RCA). Each material was also tested under two different circumstances. First, the materials were tested in a small-scale direct shear (SSDS) test with the maximum material size of 0.425 mm and 2.0 mm. Secondly, the materials were tested in a large-scale direct shear (LSDS) test with the graded size of aggregate accordi...
IOP Conference Series: Earth and Environmental Science, 2018
IOP Conference Series: Materials Science and Engineering, 2019
Unpredictable tropical weather particularly rainfall can possibly interfere the compaction work o... more Unpredictable tropical weather particularly rainfall can possibly interfere the compaction work of asphalt pavement. Heavy rainfall often leads the asphalt to cool and harden quickly and become difficult to compact. This study evaluates the effect of rainfall on the compaction properties of hot mix asphalt (HMA). A dense-graded mix of AC14 was prepared using 60/70 PEN bitumen and compacted at different temperatures. A handy steel roller was used to compact the slab samples with the size of 305 mm × 305 mm × 50 mm. The cooling rate and time available for compaction (TAC) were monitored using thermocouple under different levels of artificial rainfall and wind speed generated in the laboratory to simulate the wet conditions. The slabs were then cored at 100 mm diameter and tested for the volumetric properties. The result shows that environmental conditions and mix temperature determines the cooling rate and final density of the asphalt pavement. In addition, the TAC decreases as the co...
IOP Conference Series: Materials Science and Engineering, 2019
Natural crushed aggregate (NCA) is the most common material for aggregate throughout the world. T... more Natural crushed aggregate (NCA) is the most common material for aggregate throughout the world. The consumption of the NCA itself is rising up through the years. Concrete structures and road construction are some of the most consuming aggregate material, especially NCA. Therefore, aggregate such as recycled concrete aggregate (RCA) has become an alternative material for some particular civil construction. The implementation of RCA as road construction material has been raised for a long time ago especially in road base layer. Road base layer as foundation for road pavement must provide an adequate strength to hold the working load on the pavement surface. RCA is more heterogeneous material compared to NCA as the RCA contain many substances, such as aggregate, cement, sand, and some additive substances. Hence, it effects the strength of the RCA as construction material. In this paper, the properties of the RCA are investigated to get the characteristic of the aggregate. Density, wate...
Jurnal Teknologi, 2014
Underside Shaped Concrete Block (USCB) is a groove shaped block on the underside surface. The USC... more Underside Shaped Concrete Block (USCB) is a groove shaped block on the underside surface. The USCB concept utilizes groove pattern to grip and produce better resistance to the underside surface of block units onto the bedding sand layer. However, the horizontal movement of block units is the major problem in pavement due to vehicle braking and accelerated action. This paper presents the laboratory evaluation on vertical and horizontal displacement of shell groove-USCB pavement laid onto different bedding sand layer thickness. The bedding sand layer thickness an essential parameter to produce better USCB’s performance. A series of laboratory scale test were conducted to study USCB type of the Shell-Rectangular 15 mm (Shell-R15) laid on three different loose bedding sand layer thicknesses of 50 mm, 70 mm and 90 mm respectively. Then, push-in loading test and horizontal loading test were performed. The result indicates, the bedding sand layer thickness has significant influence to...
Physics and Chemistry of the Earth, Parts A/B/C
Construction and Building Materials
Journal of Innovative Transportation
It is frequently essential to add rejuvenators to recycled mixtures comprising reclaimed asphalt ... more It is frequently essential to add rejuvenators to recycled mixtures comprising reclaimed asphalt pavement (RAP) to increase their performance. In this research, CR was desulfurized using WEO to produce a compound rejuvenator. The asphalt mixes containing 100% RAP binder were modified and rejuvenated with 0%, 3%, 6%, 9%, and 12% WEO-CR. The performance of the HMA samples were assessed using the Marshall stability-flow test, indirect tensile strength (ITS) test, and wheel-tracking device. The results showed that using a 9% WEO-CR rejuvenator restores the physical properties of the aged binder. In addition, the findings revealed that adding 100% RAP binder to the asphalt mixtures increased the tested properties of HMA samples; however, for the long-term performance of HMA, the aged binder may adversely affect the performance of the HMA mixture. Therefore, the addition of the WEO-CR rejuvenator was found to improve the overall performance of the mixture which improved the physical and chemical properties of the asphalt binder and enhanced the mechanical performance of HMA compared to the control mixture.
Journal of Physics: Conference Series
The increase in the amount of reclaimed asphalt pavement (RAP) and environmental concerns for bit... more The increase in the amount of reclaimed asphalt pavement (RAP) and environmental concerns for bitumen production have contributed to the use of RAP in road construction and maintenance. The use of higher than 15% of RAP adversely affects the physical and rheological properties of the asphalt binder and the mechanical properties of mixtures. Therefore, the use of bitumen and asphalt mixture improver were necessary to reduce the negative effects generated with the use of RAP. This paper aims to study the effect of fiberglass (FG) (0.5%, 1.0%, 1.5%, and 2%) on the mechanical properties of asphalt concrete containing 25%, 50% RAP and 9% waste engine oil. The performance of RAP asphalt mixtures incorporated with FG was evaluated using the Marshall stability test, moisture susceptibility test, and immersion wheel rutting test. The results indicated that the use of FG and RAP materials to rejuvenated asphalt mixtures resulted in an increase in the values of Marshall stability and rutting r...
Advanced Science Letters, 2018
Advanced Science Letters, 2018
Construction and Building Materials, 2022
International Journal of Pavement Engineering, 2021
Bilge International Journal of Science and Technology Research
The use of recovered asphalt pavement can reduce the amount of new bitumen and aggregates used in... more The use of recovered asphalt pavement can reduce the amount of new bitumen and aggregates used in pavement construction and rehabilitation (RAP). RAP is a waste product that results from the removal of an old or damaged pavement surface. Although it has been used since the 1970s, and numerous recommendations for using RAP in the new mixture have been made, there are only a few research available. Because the materials used are recycled, it is also cost-effective and environmentally friendly. The purpose of this study is to characterize soil that has been blended with reclaimed asphalt pavement (RAP) for use on the local road shoulder. RAP is one of the rehabilitation procedures used to repair a deteriorated surface by removing the upper pavement and replacing it with new pavement. According to earlier study, mixing dirt with different materials improves the finding. The goals of this study are to establish the material qualities of soil and RAP, determine the optimum moisture conten...
Journal of Building Engineering
Physics and Chemistry of the Earth, Parts A/B/C
Implementation of Project Based Learning (PtBL) in Universiti Teknologi Malaysia (UTM) as part of... more Implementation of Project Based Learning (PtBL) in Universiti Teknologi Malaysia (UTM) as part of Outcome Based Education (OBE) framework have faced various challenges (i.e revamp on the undergraduate co-curricullum, required high commitments from academicians & faculty and facilities to cater PtBL activities). This paper discusses the effectiveness of PtBL teaching method in an effort to develop the students’ soft skills in tandem with the technical or professional competencies; and problems, challenges and potential improvement in the course. The Survey Camp course which is offered at year one of a four years civil engineering degree programme in the Faculty of Civil Engineering (FKA), UTM was chosen for this study. It is a ten days fieldwork in which the students will carry out an engineering survey project from field to finish in groups of five to six students supervised by the academic staff. Assessment of the technical aspects was based on the students ability to meet the minimum engineering surveying’s standard whereas the assesment of soft skills was conducted during various sessions of the survey projects. Survey questionaires were given at the beginning and the end of the course as part of evaluation of the course effectiveness. The research has found that the technical aspects were achievable though with lesser degree for the engineering design. However, on the soft skills, students demonstrated an overall improvement of competency but it was difficult to determine the levels for the average students while the best and poor performers were easily observed.
Advanced Science Letters, 2018
Housing industry is one of the main drivers in nation development. The Malaysian government is ac... more Housing industry is one of the main drivers in nation development. The Malaysian government is actively promoting policies to ensure quality and affordable houses to all nations. Thus, this scenario shows that sustainability is becoming prominent in Malaysian housing industry. This concept was recently introduced in Malaysia; however, there is a lack of interest among industry stakeholders. This paper discusses a research that identified the challenges of implementing sustainability in Malaysian housing industry by, firstly, understanding the issues related. Semi-structured interview approach is employed to few housing developers in the southern region of Malaysia due to the concept is still new and fewer implementations in the industry. Through the interviews, industry stakeholders provide their different views on the barriers of implementing sustainability and strategies to promote sustainable housing in Malaysia. Findings of the interviews help in increasing awareness of industry stakeholders about the importance of sustainable concept in housing development.
Journal of Advanced Civil and Environmental Engineering, 2020
Internal friction angle (φ) is one of the important parameter in a foundation engineering, especi... more Internal friction angle (φ) is one of the important parameter in a foundation engineering, especially in the stress distribution event. The higher value of the internal friction angle shows the higher of the material can withstand the lateral force. Cohesion factor (c) is also an integral part of the shear strength for the foundation material. In the granular soil such as sand or non-cohesive material, including aggregate, cohesion value usually assumed as zero, although some cohesion factor may be applied. In this research, two different materials were tested for their shear strength. The materials were Natural Crushed Aggregate (NCA) and Recycled Concrete Aggregate (RCA). Each material was also tested under two different circumstances. First, the materials were tested in a small-scale direct shear (SSDS) test with the maximum material size of 0.425 mm and 2.0 mm. Secondly, the materials were tested in a large-scale direct shear (LSDS) test with the graded size of aggregate accordi...
IOP Conference Series: Earth and Environmental Science, 2018
IOP Conference Series: Materials Science and Engineering, 2019
Unpredictable tropical weather particularly rainfall can possibly interfere the compaction work o... more Unpredictable tropical weather particularly rainfall can possibly interfere the compaction work of asphalt pavement. Heavy rainfall often leads the asphalt to cool and harden quickly and become difficult to compact. This study evaluates the effect of rainfall on the compaction properties of hot mix asphalt (HMA). A dense-graded mix of AC14 was prepared using 60/70 PEN bitumen and compacted at different temperatures. A handy steel roller was used to compact the slab samples with the size of 305 mm × 305 mm × 50 mm. The cooling rate and time available for compaction (TAC) were monitored using thermocouple under different levels of artificial rainfall and wind speed generated in the laboratory to simulate the wet conditions. The slabs were then cored at 100 mm diameter and tested for the volumetric properties. The result shows that environmental conditions and mix temperature determines the cooling rate and final density of the asphalt pavement. In addition, the TAC decreases as the co...
IOP Conference Series: Materials Science and Engineering, 2019
Natural crushed aggregate (NCA) is the most common material for aggregate throughout the world. T... more Natural crushed aggregate (NCA) is the most common material for aggregate throughout the world. The consumption of the NCA itself is rising up through the years. Concrete structures and road construction are some of the most consuming aggregate material, especially NCA. Therefore, aggregate such as recycled concrete aggregate (RCA) has become an alternative material for some particular civil construction. The implementation of RCA as road construction material has been raised for a long time ago especially in road base layer. Road base layer as foundation for road pavement must provide an adequate strength to hold the working load on the pavement surface. RCA is more heterogeneous material compared to NCA as the RCA contain many substances, such as aggregate, cement, sand, and some additive substances. Hence, it effects the strength of the RCA as construction material. In this paper, the properties of the RCA are investigated to get the characteristic of the aggregate. Density, wate...
Jurnal Teknologi, 2014
Underside Shaped Concrete Block (USCB) is a groove shaped block on the underside surface. The USC... more Underside Shaped Concrete Block (USCB) is a groove shaped block on the underside surface. The USCB concept utilizes groove pattern to grip and produce better resistance to the underside surface of block units onto the bedding sand layer. However, the horizontal movement of block units is the major problem in pavement due to vehicle braking and accelerated action. This paper presents the laboratory evaluation on vertical and horizontal displacement of shell groove-USCB pavement laid onto different bedding sand layer thickness. The bedding sand layer thickness an essential parameter to produce better USCB’s performance. A series of laboratory scale test were conducted to study USCB type of the Shell-Rectangular 15 mm (Shell-R15) laid on three different loose bedding sand layer thicknesses of 50 mm, 70 mm and 90 mm respectively. Then, push-in loading test and horizontal loading test were performed. The result indicates, the bedding sand layer thickness has significant influence to...
Physics and Chemistry of the Earth, Parts A/B/C
Construction and Building Materials
Journal of Innovative Transportation
It is frequently essential to add rejuvenators to recycled mixtures comprising reclaimed asphalt ... more It is frequently essential to add rejuvenators to recycled mixtures comprising reclaimed asphalt pavement (RAP) to increase their performance. In this research, CR was desulfurized using WEO to produce a compound rejuvenator. The asphalt mixes containing 100% RAP binder were modified and rejuvenated with 0%, 3%, 6%, 9%, and 12% WEO-CR. The performance of the HMA samples were assessed using the Marshall stability-flow test, indirect tensile strength (ITS) test, and wheel-tracking device. The results showed that using a 9% WEO-CR rejuvenator restores the physical properties of the aged binder. In addition, the findings revealed that adding 100% RAP binder to the asphalt mixtures increased the tested properties of HMA samples; however, for the long-term performance of HMA, the aged binder may adversely affect the performance of the HMA mixture. Therefore, the addition of the WEO-CR rejuvenator was found to improve the overall performance of the mixture which improved the physical and chemical properties of the asphalt binder and enhanced the mechanical performance of HMA compared to the control mixture.
Journal of Physics: Conference Series
The increase in the amount of reclaimed asphalt pavement (RAP) and environmental concerns for bit... more The increase in the amount of reclaimed asphalt pavement (RAP) and environmental concerns for bitumen production have contributed to the use of RAP in road construction and maintenance. The use of higher than 15% of RAP adversely affects the physical and rheological properties of the asphalt binder and the mechanical properties of mixtures. Therefore, the use of bitumen and asphalt mixture improver were necessary to reduce the negative effects generated with the use of RAP. This paper aims to study the effect of fiberglass (FG) (0.5%, 1.0%, 1.5%, and 2%) on the mechanical properties of asphalt concrete containing 25%, 50% RAP and 9% waste engine oil. The performance of RAP asphalt mixtures incorporated with FG was evaluated using the Marshall stability test, moisture susceptibility test, and immersion wheel rutting test. The results indicated that the use of FG and RAP materials to rejuvenated asphalt mixtures resulted in an increase in the values of Marshall stability and rutting r...
Advanced Science Letters, 2018
Advanced Science Letters, 2018
Construction and Building Materials, 2022
International Journal of Pavement Engineering, 2021