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The effect of aggregate types on the performance of asphalt mixture incorporating silane additive zycotherm

The effect of aggregate types on the performance of asphalt mixture incorporating silane additive zycotherm / Pavanithan Nathan
Kegagalan ikatan di dalam bahan turapan adalah disebabkan mekanisme seperti kegagalan di antara permukaan agregat-asfalt dan kegagalan pada pengikat asphalt itu sendiri. Ia memendekkan hayat campuran asfalt, serta mengakibatkan kegagalan seperti keretakan, pelucutan dan jalan berlubang. Kajian ini ditumpukan kepada jenis agregat dan kesan penambahan surfaktan ‘Zycotherm’ ke dalam campuran asfalt. Suhu pencampuran dan pemadatan bagi campuran asfalt pemalar adalah 160 ℃ dan 150 ℃ masing-masing, manakala, campuran asfalt yang dicampur ‘Zycotherm’ dicampur dan dipadatkan masing-masing pada 145 ℃ dan 125 ℃. Kebolehkhidmatan campuran asfalt diukur menggunakan Indeks kebolehkerjaan, Indeks penyalutan dan Indeks tenaga pemadatan. Manakala kerosakan disebabkan tindakbalas air dan kelembapan dinilai dengan membandingkan sampel yang dikondisi dengan menggunakan Accelerated Lab Vacuum Saturator (ALVS) dan sampel yang kering iaitu tidak dikondisi menggunakan ujian kekuatan tegangan tidak langsung dan ujian Cantabro. Ujian ricih Leutner telah digunakan untuk menguji rintangan ricih dalam campuran asfalt yang dihasilkan menggunakan aggregat yang berbeza. Berdasarkan hasil daripada kajian Indeks kebolehkerjaan dan Indeks penyalutan, campuran asphalt granit mempunyai prestasi yang lebih baik dalam campuran asfalt pada suhu tinggi manakala batu kapur menunjukkan prestasi yang baik dalam penghasilan campuran asfalt pada suhu yang rendah. Merujuk kepada Indeks Coatability, ia boleh disimpulkan bahawa campuran asfalt yang dihasilkan dengan granit mempunyai salutan bitumen yang lebih baik berbanding batu kapur. Prestasi campuran asfalt granit pada suhu tinggi secara umumnya lebih baik berbanding batu kapur. Walaubagaimanapun, campuran asfalt yang ditambah Zycotherm memberikan ketahanan yang lebih baik kepada kelembapan. _______________________________________________________________________________________________________ The bond within asphalt mixture constituents fails in the presence of different mechanism interacting at the interface which results in various forms of distress initiated from the aggregate-asphalt binder surface and cohesive failure within the asphalt binder. It shortens the service life of asphalt mixtures, resulting in failures such as cracking, rutting and potholes. This study concentrates on the aggregates and the effects of adding silane additive to the asphaltic mixture. Mixing and compaction temperatures of 160 ℃ and 150 ℃ respectively was adopted to produce control mixture hot mix asphalt (HMA). While, asphalt mixtures incorporating Zycotherm was mixed and compacted at 145 °C and 125 °C respectively. The serviceability of asphaltic mixture was measured using Workability Index (WI), Coatability Index (CI) and Compaction Energy Index (CEI). Whereas the moisture damage is evaluated by comparing the Accelerated Lab Vacuum Saturator (ALVS) conditioned samples with the dry controlled samples using Indirect Tensile Strength Test (ITS) and Cantabro test. Leutner Shear test was used to test the bonding between aggregates and binder in asphaltic concrete. Based on the test results, it was found that granite is having a better performance in terms its service characteristics at controlled hot mixed asphalt (HMA) whereas limestone is performing well at lower mixing temperature. From the Coatability Index, granite has better binder coating as compared to limestone. The asphalt mixture performance generally favours to the granite at HMA temperature. However, the Zycotherm added asphalt mixture gives a better resistance to moisture and disintegration. In term of the intra-bonding of binder and aggregates, the granite at HMA temperature has the stronger bonds.
Contributor(s):
Pavanithan Nathan - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875006827
Barcode : 00003106704
Language:
English
Subject Keywords:
asphalt mixture; aggregates; granite
First presented to the public:
6/1/2017
Original Publication Date:
3/23/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 101
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-23 15:20:51.072
Date Last Updated
2020-06-05 14:22:46.872
Submitter:
Mohd Jasnizam Mohd Salleh

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