Selective demolition of masonry unit walls with a soundless chemical demolition agent

Atteyeh S. Natanzi, Debra F. Laefer, S. M.Iman Zolanvari

Research output: Contribution to journalArticlepeer-review


A soundless chemical demolition agent was applied for selective demolition to unit masonry [2 full-scale concrete brick walls in Type N mortar and 2 wallettes in lime mortar – 1 historic brick and 1 concrete brick]. Typically, cracking began shortly after 9 h and ultimately produced an average crack length of 418 mm per hole and an average maximum 5.22 mm crack width. Samples in Type-N mortar exhibited slower but significantly more cracks and wider cracking. Ninety-three percent of cracking occurred within 4 days. No masonry units were damaged and partial demolition was successful, although selective unit removal was not due to confinement.

Original languageEnglish (US)
Article number118635
JournalConstruction and Building Materials
StatePublished - Jul 10 2020


  • Concrete brick
  • Cracking
  • Expansive cement
  • Historic structures
  • Masonry structures
  • Mortar
  • Soundless chemical demolition agent
  • Unit masonry

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


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