สำนักราชบัณฑิตยสภา

93 ธั ชวี ร์ ลี ละวั ฒน์ วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๔ ต.ค.-ธ.ค. ๒๕๕๕ Abstract Short- and Long-term Performance of Fibre-Reinforced Cement Profile Sheets Containing Asbestos and Non-asbestos Materials Thatchavee Leelawat Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakornpathom 73170, Thailand The paper was aimed at comparing the performance of roof products in asbestos- and non-asbestos-reinforced cement profile sheets. Four brands of cement tiles were blinded and then sent for investigation. They were classified as blue, brown, red and green tiles. The physical and chemical tests were conducted to distinguish the properties of these tiles. The short-term properties of cement tiles were determined by breaking load per metre width. Whereas the impermeability, warm water, and heat- rain tests were conducted for the determination of long-term properties for all types of cement tiles. The results undertaken have shown that blue and brown tiles had similar types of fibres which were shorter than those fibres of red and green tiles. The bend - ing results of blue and brown tiles were significantly higher than those red and green tiles. However, the blue tiles exhibited the worst impermeability results due to their imperfection of coating. Whereas the test conditioning the tiles in warm water was found that only green tiles could not meet with the requirement of ISO 9933 standard. The heat-rain test for all of the tiles being investigated was found to meet with the standard criterion. Keywords: asbestos, cement tiles, strength, performance