Effectiveness of alkyl alkoxy silane treatment in mitigating alkali-silica reaction

TOSUN FELEKOĞLU K., FELEKOĞLU B., Baradan B.

ACI MATERIALS JOURNAL, cilt.105, sa.1, ss.20-27, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 105 Sayı: 1
  • Basım Tarihi: 2008
  • Dergi Adı: ACI MATERIALS JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.20-27
  • Anahtar Kelimeler: admixtures, alkali-aggregate reaction, durability, silane
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The possibility of using an alkyl alkoxy silane (AAS) (iso-butyltriethoxysilane) in mitigating alkali-silica reaction (ASR) has been investigated. Cement mortars were prepared with reactive aggregates of basaltic and siliceous origin. AAS was applied to the surface of test specimens. The accelerated mortar bar method (ASTM C1260) was employed for the detection of ASR-related expansions. In addition to the length change, total water absorption (ASTM C642) of mortars and penetration depth of AAS were also measured Three different curing procedures (short, medium, and long prewaiting periods) were applied to AAS-treated mortar bars before the ASTM C1260 tests. To understand the possible mechanism of prewaiting periods. on water repellency of AAS-treated mortars, Fourier-transform infrared spectroscopy (FT-IR) analyses were also performed.