Sains Malaysiana 41(1)(2012): 103–110

Cirian Pasir Pengisi Sambungan Turapan Blok Konkrit Saling Mengunci pada Jarak Sambungan dan Kecerunan yang Berbeza

(Jointing Sand Characteristics of Interlocking Concrete Block Pavements at

Different Slopes and Joint Widths)

Nur Izzi Md Yusoff*

Jabatan Kejuruteraan Awam dan Sturktur, Fakulti Kejuruteraan dan Alam Bina

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

Mohd Rosli. Hainin & Hasanan Md. Nor

Fakulti Kejuruteraan Awam, Universiti Teknologi Malaysia

81310 UTM Skudai, Johor, Malaysia

Received: 17 August 2010 Accepted: 29 June 2011

ABSTRACT

This study was done to investigate the performance of jointing sand of interlocking concrete block pavement using different slopes and joint widths. A laboratory scale model of 1.2×0.6 (m²) was built and concrete blocks (quadpave) of 200×100×60 (mm³) were used as a surface layer. The width of the joint between concrete blocks used for testing varies from 2, 4 and 6 mm, with slopes of 0, 5, 10 and 15%.  Pull out test was performed for each condition. The results show that the 2 mm joint width was found suitable to be used on the steep road. It is shown that the interlocking behaviour of concrete blocks decreases when the slope is increased. The forces need to dislodge concrete blocks from its place became smaller as the joint width gets larger. This finding is supported by the pull-out test, where only small forces are needed to dislodge concrete blocks from its place. The presence of small amount of water helps the jointing sand compressed but greater amount of it will cause erosion particularly at steeper slope. It is suggested to use the maximum slope of 10% for interlocking concrete block pavement to avoid sand erosion from the joints and subsequently decrease the interlock behaviour between concrete blocks.

Keywords: Interlocking concrete block pavement; jointing sand; joint width and slopes

ABSTRAK

Kajian ini telah dijalankan untuk menyiasat kelakuan pasir penyambung turapan blok konkrit saling mengunci pada jarak sambungan dan kecerunan yang berbeza. Model di makmal yang berukuran 1.2×0.6 (m²) telah dibina dan blok konkrit daripada jenis quadpave yang bersaiz 200×100×60 (mm³) telah digunakan sebagai lapisan atas. Jarak sambungan yang digunakan adalah 2, 4 dan 6 mm dengan kecerunannya adalah 0, 5, 10 dan 15%.  Ujikaji tarik keluara dijalankan untuk setiap keadaan. Hasil kajian menunjukkan jarak sambungan 2 mm adalah jarak sambungan yang paling sesuai untuk gunakan pada jalan yang bercerun. Semakin besar jarak sambungan, semakin menurun sifat penguncian antara blok konkrit. Ini berlaku di mana daya yang diperlukan untuk menarik blok keluar semakin mengecil apabila jarak sambungan semakin lebar. Kehadiran air dalam kuantiti yang sedikit menyebabkan pasir pengisi menjadi lebih mampat tetapi apabila air terlalu banyak, hakisan akan berlaku. Kajian ini mencadangkan kecerunan maksimum penggunaan turapan blok konkrit saling mengunci adalah sehingga 10% untuk mengelakkan hakisan pasir pada penyambung dan juga penurunan sifat penguncian antara blok konkrit.

Kata kunci: Keluasan sambungan dan kecerunan; pasir penyambung; turapan konkrit saling mengunci

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*Corresponding author; email: izzi@vlsi.eng.ukm.my