Carbonation and fastening strength deterioration of calcium silicate board: Analysis of materials collected from a ceiling collapse accident

Ippei Maruyama, Go Igarashi, Yukiko Nishioka, Yasuo Tanigawa

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1203-1208
Number of pages6
JournalJournal of Structural and Construction Engineering
Volume78
Issue number689
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • Calcium silicate board
  • Carbonation
  • Strength
  • Tobermorite
  • Water content ratio

ASJC Scopus subject areas

  • Architecture
  • Building and Construction

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