A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thausamine in failed cement mortars and renders from exposed brickwork
AbstractThe mineral thaumasite occurs within certain cement-based building materials as a direct result of sulphate attack. It readily forms within certain types of brickwork and not only contributes to expansive cracking of the brickwork but is also accompanied by severe softening of the cement matrix. Samples were taken of both brickwork mortars and renders, some of which were still relatively sound whereas others had deteriorated into a paste. The mortar samples were investigated using a quantitative Xray diffraction technique in order to determine the amounts of thaumasite, ettringite and gypsum present. Results show that if conditions are favourable then thaumasite formation can proceed rapidly and can even result in the complete breakdown of very strong renders.
Thausamine in failed cement mortars and renders from exposed brickwork
AbstractThe mineral thaumasite occurs within certain cement-based building materials as a direct result of sulphate attack. It readily forms within certain types of brickwork and not only contributes to expansive cracking of the brickwork but is also accompanied by severe softening of the cement matrix. Samples were taken of both brickwork mortars and renders, some of which were still relatively sound whereas others had deteriorated into a paste. The mortar samples were investigated using a quantitative Xray diffraction technique in order to determine the amounts of thaumasite, ettringite and gypsum present. Results show that if conditions are favourable then thaumasite formation can proceed rapidly and can even result in the complete breakdown of very strong renders.
Thausamine in failed cement mortars and renders from exposed brickwork
Crammond, N.J. (author)
Cement and Concrete Research ; 15 ; 1039-1050
1985-08-26
12 pages
Article (Journal)
Electronic Resource
English
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