10 research outputs found
Effect of kaolin on asphalt concrete properties under aging conditions
No full textAsphalt modification is an essential process in enhancing the performance and durability of asphalt mixtures. Recently, many research has been carried out in order to shift construction industry into a green and sustainable industry. This study investigates the effect of kaolin as a partial replacement for asphalt in asphalt concrete, focusing on its impact on the mechanical properties of the mixture under various aging conditions. The asphalt mixtures were subjected to Marshall stability, resilient modulus, and dynamic creep tests to assess stability, stiffness, and rutting resistance. The results show that the incorporation of kaolin improves the overall performance of the asphalt mixtures, with 6% kaolin replacement providing the most favorable balance between stability, stiffness, and flexibility. Unaged samples with higher kaolin content exhibited increased Marshall stability, resilient modulus, and dynamic creep modulus, indicating enhanced rutting resistance. Long-term aging further enhanced the mechanical properties, with kaolin-modified mixtures showing better performance compared to their short-term aged counterparts. These findings suggest that kaolin can be an effective modifier in asphalt mixtures, offering a sustainable and cost-effective solution to improve the durability and performance of pavement materials
Development of high performance bituminous mixtures incorporating sugarcane bagasse ash
No full textThis study investigates the potential of sugarcane bagasse ash as an additive in bituminous mixtures to enhance mechanical properties while promoting sustainability through agricultural waste utilization. Sugarcane bagasse ash was incorporated into 60/70 bitumen at varying contents of 0%, 3%, 5%, and 7%, and its impact on physical, chemical, and mechanical properties was evaluated. The characterization of sugarcane bagasse ash revealed a high silica content (62.43%) and favorable filler properties, contributing to improved performance. The modified binders demonstrated reduced penetration and increased softening points at 3% and 5% sugarcane bagasse ash, indicating enhanced resistance to deformation at high temperatures. The mechanical evaluation showed significant improvements in Marshall stability, stiffness, and indirect tensile strength at 3% and 5% sugarcane bagasse ash, with peak stability (9.965 kN) and indirect tensile strength (753.612 kPa) achieved at 5% and 3% sugarcane bagasse ash, respectively. However, higher sugarcane bagasse ash content (7%) resulted in reduced stability, stiffness, and tensile strength due to excessive voids and weakened cohesion. The correlation analysis revealed strong relationships between stability, density, and abrasion loss, with the optimal performance observed at moderate sugarcane bagasse ash levels. The study concludes that sugarcane bagasse ash is a viable additive for bituminous mixtures, providing improved mechanical performance and sustainability benefits when used at optimal levels of 3%-5%. This research highlights the dual benefits of enhancing bitumen performance and managing agricultural waste, contributing to sustainable construction practices
Performance evaluation of grated coconut waste as a bitumen modifier
No full textCoconut is extensively utilized in everyday existence, with around 3.18 million tonnes of waste, including grated coconut, being generated. Utilizing grated coconut waste as an ingredient in bitumen could alleviate the challenges encountered by environmental authorities. This study aimed to examine the impact of grated coconut waste on the characteristics of bitumen and evaluate its performance in the bitumen mixture. A mixture of bitumen 60/70 penetration grade and grated coconut waste was created, with varying percentages of 0%, 1%, 2%, and 3%. The mechanical qualities of grated coconut waste as a bitumen modifier were assessed using several tests, including the indirect tensile strength test and the Marshall stability test. The physical and mechanical characteristics of grated coconut waste as a modifier for bitumen were assessed utilizing tests for softening point test and penetration test. Based on this study, the findings for physical properties of penetration and softening point test, the used up until 3% grated coconut waste can give effect to the bitumen stiffness. One of the more significant findings to emerge from this study is that higher stability and tensile strength of 1% grated coconut waste at 10420 N and 271 kPa, respectively. In conclusion, the used of 1% grated coconut waste as a bitumen modifier resulted the positive effect to the physical properties and mechanical properties of the bitumen mixture
Utilisation of sawdust and charcoal ash as sustainable modified bitumen
No full textBitumen pavements play a critical role in modern transportation infrastructure, providing durable and reliable surfaces for roads and highways. However, traditional bitumen modifiers often rely on non-renewable resources and may contribute to environmental degradation. In response to the need for sustainable alternatives, this study explores the potential of utilizing sawdust (SD) and charcoal ash (CA) as bitumen modifiers. SD and CA were blended with bitumen grade 60/70 with 0% (control) and varied amounts of proportion using combination of SD and CA. Moreover, the sustainable modified bitumen mixture was assessed using the Marshall stability, indirect tensile strength and loss abrasion test. Specifically, adding 7SD0.5CA performs the best in stability as a sustainable modified bitumen mixture. The correlation between stability, tensile strength and loss abrasion for SD and CA modified bitumen mixture was significant, with a strong Coefficient of Determination (R2) of average 0.96 for all testing parameters. According to this study’s findings, the correlation of SD and CA content may improve the performance and engineering characteristics with respect to sustainable modified bitumen
Exploring the Potential of Waste Cooking Oil in Enhancing Warm Mix Asphalt Performance
No full textThe growing need for sustainable materials in road construction has led to the investigation of waste cooking oil (WCO) as a modifier for warm mix asphalt (WMA). This study evaluates the effects of chemically treated WCO on the mechanical properties of WMA, focusing on stability, resilient modulus, and dynamic creep performance. WCO was treated through transesterification and incorporated into 60/70 penetration grade asphalt at various dosages (0%, 3%, 4%, and 5% by weight of asphalt). The results showed that a 3% WCO-modified asphalt achieved the highest stability and acceptable resilient modulus, while maintaining satisfactory rutting resistance. Higher WCO content led to reduced stiffness and creep performance due to excessive softening. The study concludes that treated WCO can enhance WMA performance when used in optimal amounts, contributing to sustainable pavement practices
Fiber from coconut as smart materials in road construction
No full textThis study investigates the effects of incorporating coconut fiber as a sustainable modifier in bitumen mixtures, focusing on its impact on mechanical properties such as Marshall stability, indirect tensile strength (ITS), flow, stiffness, and abrasion resistance. Coconut fiber was added at varying percentages (0%, 0.50%, 0.75%, and 1%) to evaluate its performance. The Marshall stability results revealed a significant improvement at 1% fiber content, achieving the highest stability of 11.978 kN, while ITS exhibited a strong polynomial correlation (R2 =0.9818) with fiber content, peaking at 423 kPa for the same fiber percentage. Flow and stiffness showed non-linear trends, with optimal results observed at specific fiber levels, reflecting the complex interaction between fiber dispersion and matrix bonding. Abrasion loss analysis indicated that lower fiber percentages (0.50%) enhanced wear resistance, while higher contents (1%) improved structural integrity but increased susceptibility to wear. The findings highlight that 1% coconut fiber content provides the best balance between mechanical strength and durability, offering a promising approach for enhancing bitumen performance in sustainable road construction. These results underscore the potential of coconut fiber as a cost-effective and environmentally friendly material for improving the performance of bituminous mixtures, aligning with sustainable development goals
Exploring the potential of waste cooking oil in enhancing warm mix asphalt performance
No full textThe growing need for sustainable materials in road construction has led to the investigation of waste cooking oil (WCO) as a modifier for warm mix asphalt (WMA). This study evaluates the effects of chemically treated WCO on the mechanical properties of WMA, focusing on stability, resilient modulus, and dynamic creep performance. WCO was treated through transesterification and incorporated into 60/70 penetration grade asphalt at various dosages (0%, 3%, 4%, and 5% by weight of asphalt). The results showed that a 3% WCO-modified asphalt achieved the highest stability and acceptable resilient modulus, while maintaining satisfactory rutting resistance. Higher WCO content led to reduced stiffness and creep performance due to excessive softening. The study concludes that treated WCO can enhance WMA performance when used in optimal amounts, contributing to sustainable pavement practices
Performance Evaluation of Grated Coconut Waste as a Bitumen Modifier
No full textCoconut is extensively utilized in everyday existence, with around 3.18 million tonnes of waste, including grated coconut, being generated. Utilizing grated coconut waste as an ingredient in bitumen could alleviate the challenges encountered by environmental authorities. This study aimed to examine the impact of grated coconut waste on the characteristics of bitumen and evaluate its performance in the bitumen mixture. A mixture of bitumen 60/70 penetration grade and grated coconut waste was created, with varying percentages of 0%, 1%, 2%, and 3%. The mechanical qualities of grated coconut waste as a bitumen modifier were assessed using several tests, including the indirect tensile strength test and the Marshall stability test. The physical and mechanical characteristics of grated coconut waste as a modifier for bitumen were assessed utilizing tests for softening point test and penetration test. Based on this study, the findings for physical properties of penetration and softening point test, the used up until 3% grated coconut waste can give effect to the bitumen stiffness. One of the more significant findings to emerge from this study is that higher stability and tensile strength of 1% grated coconut waste at 10420 N and 271 kPa, respectively. In conclusion, the used of 1% grated coconut waste as a bitumen modifier resulted the positive effect to the physical properties and mechanical properties of the bitumen mixture
Assessing the viability of wood ash as a filler in asphalt mixtures
No full textWaste management is increasingly crucial worldwide, and integrating agro-waste into pavement construction offers a promising approach for sustainability and enhanced material properties. This research investigates the use of wood ash as a filler in asphalt mixtures, using varying proportions of 0%, 2%, 4%, and 6% replacement by weight of asphalt. Experimental tests, including softening point, penetration, Marshall stability and flow, indirect tensile strength, and abrasion loss, were conducted to assess the influence of wood ash on asphalt mixture properties. The findings reveal that wood ash can improve certain performance aspects such as stiffness and density at an optimal content of 4%, balancing tensile strength and flow properties. However, higher wood ash percentages negatively affected the mixture's overall durability and stability. These results underscore the importance of optimizing wood ash content to enhance asphalt performance. This study demonstrates that wood ash is a sustainable alternative to conventional fillers in asphalt production, contributing to environmental conservation and waste management. Further research is recommended to explore various aggregate gradations, binder types, and the potential of wood ash as an asphalt modifier for quality improvement. Such studies are vital for advancing pavement technology, improving infrastructure quality, and addressing environmental challenges
Assessing the Viability of Wood Ash as a Filler in Asphalt Mixtures
No full textWaste management is increasingly crucial worldwide, and integrating agro-waste into pavement construction offers a promising approach for sustainability and enhanced material properties. This research investigates the use of wood ash as a filler in asphalt mixtures, using varying proportions of 0%, 2%, 4%, and 6% replacement by weight of asphalt. Experimental tests, including softening point, penetration, Marshall stability and flow, indirect tensile strength, and abrasion loss, were conducted to assess the influence of wood ash on asphalt mixture properties. The findings reveal that wood ash can improve certain performance aspects such as stiffness and density at an optimal content of 4%, balancing tensile strength and flow properties. However, higher wood ash percentages negatively affected the mixture's overall durability and stability. These results underscore the importance of optimizing wood ash content to enhance asphalt performance. This study demonstrates that wood ash is a sustainable alternative to conventional fillers in asphalt production, contributing to environmental conservation and waste management. Further research is recommended to explore various aggregate gradations, binder types, and the potential of wood ash as an asphalt modifier for quality improvement. Such studies are vital for advancing pavement technology, improving infrastructure quality, and addressing environmental challenges
