1. Professor, Dept. of Construction Technologies, Faculty of Civil Engineering and Technologies, Kaunas Univ. of Technology, Studentų St. 48, LT-51367 Kaunas, Lithuania (corresponding author).
2. Professor, Dept. of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical Univ., Saulėtekio av. 11, LT-10223 Vilnius, Lithuania.