Performance of hot mix asphalt incorporating treated crumb rubber and treated plastic additives using dry process

Pavement defect shortens the service life of mixture, demonstrated by failures such as cracking, rutting, and stripping. Incorporating additives into conventional mixture is an approach to improve its performance and service life. Therefore, this research was conducted in three phases using treated crumb rubber (TCR) and treated plastic (TP) as additives in the mixture. In the first phase, both additives were characterised using thermogravimetric analysis (TGA), field-emission scanning electron microscope (FE-SEM) and energy dispersive x-ray (EDX). Eight different percentages of TCR from 0.25 % to 5.0 % and six different percentages of TP from 0.25 % to 3.0 % were incorporated into a 14 mm nominal maximum aggregate size (AC14) mixture using a dry process. Marshall test was carried out to determine the optimum percentage of the additives. Results show that the mixtures of 0.75 % TCR and 0.75 % TP met all the required specifications and were selected as the optimum percentage. The mixtures with 0.75 % TCR and 0.75 % TP improved the fatigue cracking and rutting resistance compared to the conventional mixture. In the second phase, mechanical tests such as resilient modulus, dynamic creep, rutting and moisture damage of compacted and uncompacted mixtures and scanning electron microscope (SEM) were conducted to evaluate the performance of the mixture containing TCR and TP. Although the modified mixtures with both additives showed better performance than the conventional mixture, the TCR mixture was susceptible to rutting and moisture damage, while the TP mixture was identified with stripping potential. To overcome the issues, a combination of TCR and TP was investigated in the final phase. A mixture with 50 % TCR and 50 % TP shows 37 %, 44 % and 4 % improvement in the fatigue, rutting and moisture damage resistance, respectively, compared to the conventional mixture. It can be concluded that the combination of TCR-TP in mixture using dry process can be used as an alternative mixture to improve pavement performance

Cup lump modified asphalt mixture along jalan Kuala Lumpur-Kuantan, daerah Temerloh, Pahang

Issue of rubber additive in asphalt mixture has been discussed in asphalt industry Malaysia and its usage was suggested to be used in Pan Borneo Highway project. Using rubber additives can increase revenue rubber tappers in Malaysia. Hence, a study was conducted by the Public Works Department (PWD) and Malaysian Rubber Board (MRB) to investigate the properties of Cup Lumps Modified Asphalt (CMA) based on PWD specifications and its performance. The study area selected was at FT02, Jalan Kuala Lumpur - Kuantan, Temerloh Pahang. In this study, 5 % Cup Lump Modified Binder (CMB) were used. Tests involved were Penetration Softening Point, Flash Point, Dynamic Shear, Marshall, Road Scanner (RS), Falling Weight Deflectometer (FWD), Skid Resistance (Pendulum Test) and Dynamic Creep. The results indicate that CMB with bitumen 60/70 meet the specification. However, it will tend to rut when the temperature exceeds 70°C. For CMA mixture, it shows similar performance with conventional mixture. Meanwhile, at site, the performance for CMA pavement was better in surface condition (94 % good condition in roughness), structural condition (100 % good condition), skid resistance (SRV 63) and dynamic creep (32.01 MPa) compared to conventional pavement AC14. Thus, it can be suggested that the performance of CMA is better than conventional mixture AC14

The Usage of Treated Plastic as Additive to Improve the Asphalt Mixture’s Performance by Using Dry Mix Method

Nowadays, road damage issue become the norm due to increment of traffic load and traffic volume. It shortens the service life of asphalt mixtures and increase the cost of maintenance. One way to reduce the issue is by using polymer additive in asphalt mixture. Treated Plastic is one type of polymer additive made of plastic bag (Polyethylene). The main purpose of this research is to determine the improvement of asphalt mixture’s performance incorporating Treated Plastic (TP) as additive in terms of stability, stiffness, fatigue cracking, stripping and rutting. The mechanical properties of asphalt mixes that include various percentages of TP (0%, 0.25%, 0.5%, 0.75%, 1%, 2% and 3%) were calculated and assessed with laboratory tests. 0.75% by weight of total mix of TP was found to be the optimum amount. The outcomes were analyzed by Marshall Stability and Flow, Resilient Modulus, Tensile Strength Ratio and Hamburg Wheel Tracker test. As the results shown, the addition of TP gave significant improvement to the stability and stiffness of asphalt mixture.0.75% of TP was selected as the optimum percent content with percent improvement about 100, 73 and 25% for fatigue cracking, rutting and stripping resistance respectively. Hence, 0.75% of TP improved the resistance of rutting and stripping but susceptible to fatigue cracking

The usage of treated plastic as additive to improve the asphalt mixture’s performance by using dry mix method

Nowadays, road damage issue become the norm due to increment of traffic load and traffic volume. It shortens the service life of asphalt mixtures and increase the cost of maintenance. One way to reduce the issue is by using polymer additive in asphalt mixture. Treated Plastic is one type of polymer additive made of plastic bag (Polyethylene). The main purpose of this research is to determine the improvement of asphalt mixture’s performance incorporating Treated Plastic (TP) as additive in terms of stability, stiffness, fatigue cracking, stripping and rutting. The mechanical properties of asphalt mixes that include various percentages of TP (0%, 0.25%, 0.5%, 0.75%, 1%, 2% and 3%) were calculated and assessed with laboratory tests. 0.75% by weight of total mix of TP was found to be the optimum amount. The outcomes were analyzed by Marshall Stability and Flow, Resilient Modulus, Tensile Strength Ratio and Hamburg Wheel Tracker test. As the results shown, the addition of TP gave significant improvement to the stability and stiffness of asphalt mixture. 0.75% of TP was selected as the optimum percent content with percent improvement about 100, 73 and 25% for fatigue cracking, rutting and stripping resistance respectively. Hence, 0.75% of TP improved the resistance of rutting and stripping but susceptible to fatigue cracking

Effects of moisture damage sensitivity of asphalt mixtures incorporating treated plastic as additive

The issue of moisture damage due to water intrusion in conventional road pavement is crucial due to increasing traffic load and volume, especially in the dry process. Poor workability occurs between the aggregate and binder interaction, increasing air voids in the asphalt mixture. Consequently, reduce the strength of the asphalt mixture. Hence, the additive material is one possible approach to reduce the issue. The use of treated plastic (Low-density Polyethylene) (TP) has a high potential to improve the interaction of aggregate and binder during the mixing process to against moisture damage. Further investigation on the effect of different ratios of TP content (0, 2.5, 5.0, 0.75, and 1.0% by weight of total aggregate) in asphalt mixture was studied. Mechanical performances on moisture damage of the optimum TP content in asphalt mixture were focused and evaluated with retained stability and tensile strength ratio tests. The finding revealed that 0.75% of TP content increased the resistance of moisture damage in asphalt mixtures compared to the conventional mixture

A review on the usage of waste engine oil with aged asphalt as a rejuvenating agent

The use of reclaimed asphalt pavement (RAP) has been becoming one of the best solutions to preserve natural resources in the construction sector. However, the stiffness property of aged asphalt resulted from the RAP is considered as the main obstacle in the field application. Nevertheless, waste engine oil (WEO), as one of the most common rejuvenating agent, has been used for renovating the characteristics of aged asphalt. This paper presents a review of the previous research works conducted on the rejuvenating of aged asphalt using WEO, including its benefits, drawbacks and its adverse side effect. It was observed that the inclusion of WEO as a rejuvenating agent gives positives and negatives influences on the attributes of aged asphalt. Therefore, an integration of WEO with other modifiers might be beneficial for renovating the performance of aged asphalt at both low and high temperatures. The results of this review can be used to predict future challenges in the renovation of aged asphalt using WEO