1Department of Civil Engineering, Engineering Faculty, Universiti Putra Malaysia, 43400, UPM,
Serdang, Selangor, Malaysia
2Institute of Advanced Technology, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia
Submission date: 2014-04-09
Acceptance date: 2014-06-16
Publication date: 2015-04-02
Pol. J. Environ. Stud. 2015;24(2):605–609