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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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