Sains Malaysiana 43(3)(2014): 467–474

 

Information for the Malaysian Asphalt Industry towards Better Pavement Interlayer Bonding

(Maklumat kepada Industri Asfalt Malaysia ke Arah Lekatan Lapisan Turapan yang Lebih Baik)

HARYATI YAACOB2, MOHD ROSLI HAININ2, AHMAD SAFUAN2& FUNG-LUNG CHANG1*

1Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81300 UTM Skudai

Johor Bahru, Malaysia

 

2Faculty of Civil Engineering, Department of Geotechnics and Transportation

Universiti Teknologi Malaysia, 81300 UTM Skudai, Johor Bahru, Malaysia

 

Diserahkan: 9 Januari 2013/Diterima: 16 Jun 2013

 

ABSTRACT

Quality of bond between layers of asphaltic concrete course is a key element to ensure the performance of a modern asphalt pavement. A proper interlayer bond ensures the structural integrity of the pavement and prevents possible distresses from occurring within the designed service life. In Malaysia, delamination is a common distress related to insufficient degree of adhesion though slippage failure can be occasionally encountered. Generally, bond development is closely related to the design factors and construction factors. This paper however focused on the construction factors only, hoping to provide some useful information which might be overlooked by the contractors during construction but is of extreme important especially in enhancing the bond development in the asphalt layers. The construction factors in particular interest discussed in this paper include curing time of asphalt emulsion, surface condition of a pavement and technology and quality of workmanship and construction. It is important to note that both design factors and construction factors are inter-related in optimizing the degree of adhesion. Thus, all factors need to be carefully identified and fulfilled in order to maximize the bond strength between pavement surfacing layers for a better quality and longer service life of pavement in Malaysia.

 

Keywords: Asphalt; bonding; construction practices; surfacing layers; tack coat

 

ABSTRAK

Kualiti ikatan antara lapisan konkrit berasfalt merupakan unsur penting bagi memastikan prestasi turapan asfalt moden. Satu ikatan yang sempurna akan memastikan integriti struktur turapan dan mencegah kerosakan yang mungkin berlaku di sepanjang tempoh khidmat. Di Malaysia, nyahikatan adalah kegagalan umum yang berkaitan dengan kekuatan ikatan antara lapisan jalan walaupun kegagalan gelinciran mungkin juga ditemui. Secara umumnya, daya ikatan antara lapisan jalan adalah berkait rapat dengan faktor reka bentuk dan faktor pembinaan. Kajian ini bagaimanapun akan memberi tumpuan kepada faktor pembinaan sahaja bagi menyediakan beberapa maklumat berguna yang mungkin diabaikan oleh kontraktor semasa pembinaan tetapi adalah amat penting dalam meningkatkan daya ikatan dalam lapisan konkrit berasfalt. Faktor pembinaan yang dibincangkan termasuk masa pengawetan asfalt emulsi, keadaan permukaan turapan dan teknologi, kualiti kerja dan pembinaan. Kedua-dua faktor reka bentuk dan pembinaan adalah saling berkaitan dengan daya ikatan. Oleh itu, semua faktor perlu dikenal pasti dengan teliti bagi memaksimumkan kekuatan ikatan antara lapisan permukaan, justeru menghasilkan turapan berkualiti dengan tempoh khidmat yang lebih panjang di Malaysia.

 

Kata kunci: Amalan pembinaan; asfalt; ikatan; lapisan permukaan; salut jelujur

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*Pengarang untuk surat-menyurat; email: flchang87@hotmail.com