Asfalt berliang adalah campuran asfalt istimewa dengan kandungan lompang udara sebanyak 20% atau lebih. Keliangan adalah penting bagi memastikan fungsi ekologi turapan asfalt berliang seperti penyaliran air, pengurangan hingar dan penulenan air. Walaubagaimanapun, asfalt berliang terdedah kepada kemerosotan pramatang seperti perubahan bentuk kekal, perlucutan dan lompang udara tersumbat yang merendahkan populariti turapan jenis ini di jalan raya berkelajuan tinggi. Punca utama kepada ubah bentuk kekal dan jurai adalah disebabkan oleh kesan suhu dan kekurangan kejelekatan antara asfalt dan agregat, terutamanya di bawah pengeruh beban trafik yang berulang. Tujuan kajian ini adalah untuk menilai prestasi asfalt berliang TPS yang diubah suai menggunakan Tough Fix Hyper (TFH), dan membandingkannya dengan prestasi campuran asfalt berliang terubahsuai TPS mengandungi Tough Fix (TF). Asfalt berliang disediakan berdasarkan kepada rekabentuk campuran yang dipastikan terlebih dahulu dan disahkan berdasarkan kepada peratus lompang udara, kebolehtelapan dan liang bercantum. Tambahan pula, ujian prestasi campuran seperti kebolehsalutan, prestasi mekanikal dan kerosakan akibat kelembapan telah dijalankan. Ujian air didih Texas telah dijalankan untuk menilai potensi pelucutan bagi sampel aggregat bersalut bitumin yang tidak dipadatkan. Ujian pretasi mekanikal yang telah dijalankan seperti ujian kestabilan Marshall, ujian Cantabro (disuaikan dan tidak disuaikan– keadaan piawai, terendam dan menua), rayapan dinamik dan ujian jejak roda Hamburg. Ujian jejak roda Hamburg dan tiga kondisi ujian Cantabro iaitu piawai, terendam dan menua telah dijalankan untuk mengenalpasti prestasi ubah bentuk kekal dan ketahanan asfalt berliang. Nisbah kestabilan Marshall dan nisbah kekuatan tegangan telah dikira untuk mengenalpasti ketahanan terhadap kerosakan akibat lembapan. Hasil kajian menunjukkan bahawa TFH boleh meningkatkan kestabilan Marshall, rayapan dinamik, kekuatan tegangan dan rintangan terhadap kerosakkan akibat lembapan dalam campuran. Perbandingan antara prestasi TFH dan TF telah dilakukan. Keputusan menunjukkan bahawa prestasi asfalt berliang dengan TFH sebagai anti pelucutan menunjukkan prestasi keseluruhan yang lebih baik berbanding dengan TF.
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Porous asphalt (PA) is a special asphalt mixture with air voids of 20% or more. The porosity is essential to the ecological functions of porous asphalt mix, For an example, water drainage, noise reduction, and water purification. However, the PA may expose to premature deteriorations, in terms of rutting, ravelling and void clogging that hindered its popularity on high-speed roadways. The major cause of the ravelling and rutting is the temperature sensitivity and the lack of adhesion of asphalt mortar and aggregates, especially under repeated heavy traffic loading. The purposes of this study are to evaluate the performances of Tafpack-Super (TPS) PA incorporating Tough Fix Hyper (TFH) and to compare the performances with the TPS PA incorporating Tough Fix (TF). Initially, the PA mixes were prepared based on the predetermined mix design, and verified based on the percentage of air voids, permeability, and the connected air voids. Moreover, the mixture performance tests in terms of coatability, mechanical performance, and moisture damage were carried out. The Texas boiling test was conducted to evaluate the stripping potential of uncompacted mixtures. The mechanical performance tests were then performed using Marshall stability test, Cantabro test at various conditions (standard, immersion and ageing), dynamic creep test and Hamburg wheel tracking test. The Hamburg wheel tracking test and three conditioning protocols Cantabro test were performed to assess the resistance of PA mixes towards rutting and ravelling, respectively. Finally, the retained Marshall stability and tensile strength ratio are calculated to determine the resistance to moisture damage. The results showed that TFH could increase Marshall stability, dynamic creep, tensile strength and resistance to moisture damage of mixtures and to compare the performance of TFH and TF. The results indicate that the performance of porous asphalt with TFH as anti-stripping agent exhibited a better overall performance as compared to TF.
The performances of tps-porous asphalt incorparting tough fix hyper / Satis Kumar Selvadurai