Warta Geologi, Vol. 48, No. 1, April
2022, pp. 23–29
Application of Schmidt hammer rebound
test for weathering profile classification of granite, Paya Terubong, Penang,
Malaysia
Mohamad Anuri Ghazali1,*, Mohd
Rozi Umor2, Mohd Syafiq Hussin3, Abdul Ghani Md. Rafek4
1,3,4Geo
Mag Engineering, Tingkat 2, Jalan Pelabur B, 23/B, Seksyen 23,
40300 Shah Alam, Selangor, Malaysia
1,2Program
Geologi, Pusat Pengajian Sains Sekitaran dan Sumber Alam Fakulti Sains dan
Teknologi,
Universiti Kebangsaan Malaysia, 43600
Bangi, Selangor D.E., Malaysia
*Corresponding author email address:
mohamadanuri16@gmail.com
Abstract: Weathering profile
characterization is one of the significant information in the interpretation of
the condition of rock. In addition, the tropical climate in Malaysia causes the
deep–seated weathering phenomena of granitic rock. The identification of
weathering profile of granite can be made using in–situ Schmidt hammer rebound
test which is one of the non–destructive tests (NDT) that is widely used. In
this study, the test is carried out on granitic rock in Paya Terubong, Pulau
Pinang. Based on the study conducted, the value for each of weathering grade of
granite can be identified. The value for fresh granite (Grade I) is greater
than 55, slightly weathered granite (Grade II) is ranging from 35 – 55,
moderately weathered granite (Grade III) is ranging from 17 – 35 and highly
weathered granite (Grade IV) is less than 17. Completely weathered granite
(Grade V) and residual soil (Grade VI) do not have any Schmidt hammer rebound
values. This method can be used as a very useful method in the field to
determine the degree of weathering of rock outcrops.
Keywords: Granite, weathering grade,
weathering profile, Schmidt hammer rebound test
Abstrak: Pencirian luluhawa adalah salah
satu informasi penting dalam menafsir keadaan suatu singkapan batuan. Malaysia
yang mempunyai iklim tropika yang telah menyebabkan fenomena luluhawa yang
tebal dan dalam bagi batuan granit. Pengenalpastian profil luluhawa granit
boleh dilakukan dengan menggunakan kaedah ujian lantunan tukul Schmidt in-situ
yang merupakan salah satu kaedah ujian tanpa musnah (NDT) yang sering
digunakan. Dalam kajian ini, ujian lantunan tukul Schmidt dijalankan ke atas
batuan granit di Paya Terubong, Pulau Pinang. Berdasarkan kajian yang telah
dijalankan, nilai lantunan tukul Schmidt bagi setiap gred luluhawa batuan
granit dapat dikenalpasti. Nilai bagi batuan granit segar (Gred I) adalah
melebihi 55, bagi batuan granit sedikit terluluhawa (Gred II) adalah dalam
lingkungan 35 – 55, bagi batuan granit terluluhawa sederhana (Gred III) adalah
dalam lingkungan 17 – 35, dan bagi batuan granit terluluhawa tinggi (Gred IV)
adalah kurang daripada 17. Manakala, bagi batuan granit terluluhawa keseluruhan
(Gred V) dan tanah baki (Gred VI), tidak memberikan nilai lantunan tukul
Schmidt. Kaedah ini boleh dijadikan sebagai kaedah yang sangat berguna di
lapangan bagi menentukan tahap luluhawa singkapan batuan.
Kata kunci: Granit, gred luluhawa,
profil luluhawa, ujian lantunan tukul Schmidt
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Manuscript received 9 November 2021
Received in revised form 25 February 2022
Accepted 7 March 2022
Available online 26 April 2022
0126-5539; 2682-7549 / Published by the Geological Society of
Malaysia.
© 2022 by the Author(s). This is an open access article distributed
under the terms of the Creative Commons Attribution (CC-BY) License 4.0
DOI : https://doi.org/10.7186/wg481202203
