Aging of calcium silicate board is discussed in the present contribution. Recently, the fall of sealing which is composed of calcium silicate board has been reported at times. The mechanism of aging phenomena of calcium silicate board is not wholly understood. For this reason, the chemical analysis and physical property experiment on the aged and newly provided material are conducted and comparison of those results is made. It is experimentally confirmed that tobermorite in calcium silicate board can be carbonated and resultantly it causes decreasing of density, increasing of water vapor BET surface area and water penetration rate, and decrease in strength. The weight of calcium silicate board per strength can be dropped as it is about 12.5% of original value. It is expected that relatively high water content enhances carbonation rate because carbon dioxides dissolves in it and makes carbonic acid. Therefore, it is strongly recommended that calcium silicate board is only used in the drying condition.
|Number of pages||6|
|Journal||Journal of Structural and Construction Engineering|
|Publication status||Published - 2013 Jul|
- Calcium silicate board
- Water content ratio
ASJC Scopus subject areas
- Building and Construction