Cooling time of porous asphalt pavement affecting compaction process due to various raining condition

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Hashim, W.^1 ; Noor, M.N.M.^1 ; Shaffie, E.^1 ; Rahman, Z.A.^1 ; Arshad, A.K.^2

Faculty of Civil Engineering, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia^1

Institute of Infrastructure Engineering and Sustainablity Management, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia^2

关键词: Adverse weather;    Compaction process;    Construction projects;    Porous asphalt pavement;    Porous asphalts;    Porous pavement;    Rain-intensity;    Warm temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012070/pdf
DOI  :  10.1088/1755-1315/140/1/012070

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

While bright sunshine and warm temperatures make for the best paving weather, construction projects can get a bit rough in adverse weather conditions. In this case, porous asphalt is used on paving. Light sprinkles can usually be handled without any serious problems. Moderate rainfall events, on the other hand, will generally require the paving project to be postponed. Steady downpours will cool the porous asphalt mix and make proper compaction extremely difficult to obtain. For the viability of the project, contractors will always wait until the sky clears up. According to the JKR Specification 4(Clause 4.2.6.4), it clearly states that no pavement work should be done during rain. The rain is a cold medium where it will actually cools down everything that make contact with the water. Whereas, the mix porous asphalt (PA) is a hot medium. When these two elements combined, the surface and the PA will harden at a stage where it will not be well compacted. This will cause problems in the future. The test is conducted by pouring water onto the pavement(through raining simulation).Since the rain intensity can be determined by the size of the rain drops, the difference in the shower hole size is good enough to create different rain intensities to predict the PA cooling rate when it makes contact with water. These two variables will work as a comparison in this study between raining and no rain condition. As a result, whenever the water make a contact with the PA, the rates of cooling drops 98% from the normal rates of cooling of PA (without rain)giving the Time Available for Compaction (TAC) to be less than 60 seconds. This study may be a knowledge on how the rates of cooling work if the PA make contact with water. It can also be used as future reference on the study of cooling rates of porous pavement during raining condition.