Laboratory study on functional and performance-based properties of porous asphalt mix in Thailand | |
| Author | Somyonk Untama |
| Call Number | AIT Thesis no.TE-06-01 |
| Subject(s) | Asphalt emulsion mixtures Pavements, Porous--Thailand Asphalt concrete |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Transportation Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TE-06-01 |
| Abstract | At present, most pavement design methods are focused on selecting layered structures that are resistant to traffic and environmental conditions. However, it has become more recognized that in pavement design, the aspect of safety in terms of skid resistance and visibility in different weather conditions are required. Skid resistance and Visibility can be improved by draining water out of the surface to reduced splash, spray and hydroplaning. Hydroplaning is minimized with high permeability of the pavement which means that water is permeated rapidly from the surface further causing skid reduction, which is an important function of pavement surfaces. Conventional hot mix asphalt (HMA) or dense-graded asphalt mix has been widely used in Thailand's highways for long time. It has been found that most HMA pavements in Thailand always have rutting problems especially at intersections and at locations with slow speed traffic movement. Due to the rutting, water is stored on the surface at the rut area, and hence causing hydroplaning problems. In addition, fatigue cracking and bleeding are also observed as the prominent pavement problems in the country. Two other mixes which are not widely used in Thailand are stone matrix asphalt (SMA) and porous asphalt (PA), however, those were widely used in the United States and Europes. The US. and Europe's experiences with PA and SMA pavement indicate that these pavement surfaces can provide good skid resi stance by using excellent wear resistance aggregate and can reduce noise generation. In addition, these asphalt surfaces offer the benefits in terms of the improvement of rut resistance and the reduction of hydroplaning, splash and spay due to wet weather. This study focused on the evaluation of PA performance and compared to SMA and conventional HMA by using limestone from the same source. The British Pendulum skid tester was used for measuring the skid resistance of the mixtures. L.C.S. permeameter was used for measuring permeability. Standing Wave Apparatus Type 4002 was used for measuring sound absorption coefficient to represent the ability of noise reduction of asphalt mixture. Two performance-related properties which are the rutting resistance and the moisture damage resistance were tested by using the load wheel tracking test and the indirect tensile strength test, respectively. It was found that gradation of PA mix significantly improve permeability and sound absorption coefficient when compared to other mixes. Based on the results from initial skidding resistance measured by using the British Pendulum Skid tester which is related to low speed skidding, conventional HMA shows highest skid number. PA shows the lowest skid due to the effect from the larger size of aggregate gaps. Polymer Modify Asphalt (PMA) binder and gradation in SMA and PA significantly improve rutting resistance. The indirect tensile strength test results indicate that dense-graded mix has higher tensile strength than gab grade of SMA and open grade of PA. PA and SMA show better resistance to moisture damage than conventional HMA. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TE-06-01 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Transportation Engineering (TE) |
| Chairperson(s) | Kunnawee Kanitpong; |
| Examination Committee(s) | Hanaoka, Shinya;Prapansak Buranaprapa; |
| Scholarship Donor(s) | Thailand Accident Research Center (TARC); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2007 |