Effect of palm oil fuel ash (POFA) fineness on the properties of asphaltic concrete AC 14

The nature and amount of the fines or filler (particles smaller than 75 μm) in an asphaltic concrete mixes significantly affect its design and performance. Palm oil fuel ash (POFA) is an ash obtained from the burning of waste material generated from the production of crude palm oil which is of high quantity in Malaysia. This study therefore, evaluates the effect of the fineness of POFA on the mechanical properties of asphaltic concrete AC 14. Using 4 different categories of POFA fineness (based on 30min of grinding, 60min, 90min and 120min), a number of trial mixes were prepared using the Marshall Mix design procedure with 5% POFA to arrive at asphalt concrete mixtures that fulfil the Marshall criteria. The effects of each POFA fineness category on the stability, flow, stiffness, indirect tensile strength and cantabro loss of asphaltic concrete (AC 14) mixtures at their respective optimum binder content were evaluated. The results show that Marshall stability, flow, stiffness indirect tensile strength and cantabro loss values were generally higher when POFA is grinded than that of controlled specimens, but after some period of grinding (peak of the curve), the values diminished. Hence, grinding POFA to some extent improves the properties of asphaltic concrete. Grinding POFA for up to 60 minutes gives the optimum improvement of the properties of asphaltic concrete mixes considered in this study

Effect of palm oil fuel ash (POFA) fineness on the properties of asphaltic concrete AC14

The nature and amount of the fines or filler (particles smaller than 75 µm) in an asphaltic concrete mixes significantly affect its design and performance. Palm oil fuel ash (POFA) is an ash obtained from the burning of waste material generated from the production of crude palm oil which is of high quantity in Malaysia. This study therefore, evaluates the effect of the fineness of POFA on the mechanical properties of asphaltic concrete AC 14. Using 4 different categories of POFA fineness (based on 30min of grinding, 60min, 90min and 120min), a number of trial mixes were prepared using the Marshall Mix design procedure with 5% POFA to arrive at asphalt concrete mixtures that fulfil the Marshall criteria. The effects of each POFA fineness category on the stability, flow, stiffness, indirect tensile strength and cantabro loss of asphaltic concrete (AC 14) mixtures at their respective optimum binder content were evaluated. The results show that Marshall stability, flow, stiffness indirect tensile strength and cantabro loss values were generally higher when POFA is grinded than that of controlled specimens, but after some period of grinding (peak of the curve), the values diminished. Hence, grinding POFA to some extent improves the properties of asphaltic concrete. Grinding POFA for up to 60 minutes gives the optimum improvement of the properties of asphaltic concrete mixes considered in this stud

Effect of palm oil fuel ash (Pofa) on the durability of asphaltic concrete

The Cantabro durability test is usually used for open graded asphalt mixtures and has seen little use with dense graded mixtures. This paper presents durability data from the Cantabro test for Palm oil fuel ash (POFA) modified dense graded asphaltic concrete AC 14. The nature and amount of filler in an asphaltic concrete mixes significantly affect its design and performance. POFA is an ash obtained from the burning of waste material generated from the production of crude palm oil which is of high quantity in Malaysia. A number of trial mixes were prepared using the Marshall Mix design procedure with 5% POFA and 1% Ordinary Portland Cement (OPC) as filler materials to arrive at asphalt concrete mixtures that fulfil the Marshall criteria. Cantabro durability test was used to measure the durability of the asphaltic concrete. The results show that Marshall stability, flow, stiffness and cantabro loss values shows general improvement for the POFA modified asphalt compared to the control specimens

The indirect tensile strength of Palm Oil Fuel Ash (POFA) modified asphaltic concrete

The amount and nature of filler in asphaltic concrete mixes significantly affect its design and performance. The use of Palm oil fuel ash (POFA) as filler in asphaltic concrete has been studied with varying degree of success, this study therefore, evaluates the effect of POFA on the indirect tensile strength of asphaltic concrete AC 14. POFA was grained and passed through 75 ìm sieve; a number of trial mixes were prepared using the Marshal Mix design procedure with 5% POFA to arrive at asphalt concrete mixtures that fulfill the Marshal criteria. The effects of POFA on stability, flow, stiffness and indirect tensile strength of asphaltic concrete (AC14) mixtures at their respective optimum binder content were evaluated. The results show that Marshall stability, flow, stiffness and indirect tensile strength values generally improved in the POFA modified mix compared with the control. POFA modified sample shows 16% improvement on the indirect tensile strength compared to the control

Effect of viscoelastic behavior of cellulose oil palm fiber (COPF) modified 60-70 asphalt binder for deterioration for roads and highways

This paper dealt with the viscoelastic behavior of Cellulose Oil Palm Fiber (COPF) modified 60-70 penetration grade asphalt binder for the deterioration of roads. The main objective of this study was to investigate the effect of various COPF contents on the physical and the rheological properties of penetration grade 60-70 asphalt binder. Laboratory tests performed comprised of viscosity, penetration, softening point, short & long term ageing, as well as complex shear modulus (G*). The COPF was blended in 0.2, 0.4, 0.6, 0.8, and 1.0% by weight of asphalt binder, including 0% as control. The COPF modified asphalt binder showed an increasing viscosity and softening point with the increase of COPF content, whereas the penetration decreased as the COPF was increased for the binder. The complex shear modulus (G*), rutting factor (G*/sin d), and fatigue factor (G*sin d) showed significant improvement for the modified samples compared to the unmodified samples. The results indicated that the COPF modified asphalt binder had high potential to resist permanent (rutting) deformation and fatigue cracking than the unmodified sample

User Preference Analysis for Mobility-as-a-Service (MaaS) and Its Impact

69A43551747123Mobility as a Service (MaaS) integrates diverse transportation modes into a unified platform to offer users personalized, convenient, flexible, and cost-effective trip options. It can address accessibility challenges, particularly for underserved population groups without cars or no driving capability, by providing them various (combinations of) alternative modes such as carpools, shared mobility\u2014such as ridesharing (e.g., Uber and Lyft), bikes and scooters\u2014and public transit. This research consists of two parts; 1) A Comparison of Mobility as a Service (MaaS) Alternatives for Access to Public Transportation Terminals and 2) User Preference for Micro Mobility: An Adaptive Choice-Based Conjoint Analysis Approach