1. Associate Professor, Faculty of Civil Engineering, Technical Univ. Gh. Asachi Iaşi, B-dul D. Mangeron 43, Iaşi 700050, Romania (corresponding author).
2. Lecturer, Faculty of Chemical Engineering, Technical Univ. Gh. Asachi Iaşi, B-dul D. Mangeron 71, Iaşi 700050, Romania.
3. Lecturer, Faculty of Civil Engineering, Technical Univ. Gh. Asachi Iaşi, B-dul D. Mangeron 43, Iaşi 700050, Romania.