Rate of the thaumasite form of sulfate attack under laboratory conditions

Brueckner, R.; Williamson, S. J.; Clark, Leslie

doi:10.1016/j.cemconcomp.2011.11.023

Cited by 18 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the rate of deterioration was found to be dependent on the mix design. However, results obtained from the experiments showed that the rate of TSA is decreased in concrete with higher strengths and therefore should not be a concern where the concrete has a compressive strength of 70 N/mm 2 or higher (Brueckner, Williamson & Clark, 2002…”

Section: Effects Of Water To Cement Ratio On Thaumasite Formationmentioning

confidence: 95%

“…(2002), it was established that a factor controlling TSA was the water to cement ratio. They have suggested that a w/c of 0.35 is needed for most aggressive environments and 0.55 for slightly aggressive environments in order to resist TSA (Brueckner, Williamson & Clark, 2002). Their experimental results showed that high rates of TSA are possible in conventional concrete designs with w/c of 0.55 and 320 kg/m 3 cement.…”

Section: Effects Of Water To Cement Ratio On Thaumasite Formationmentioning

confidence: 99%

See 1 more Smart Citation

Studies on the fresh properties an durability of unshrinkable fill containing recycled concrete aggregate or natural aggregates of marginal quality

Kolahdoozan¹

2021

Preprint

View full text Add to dashboard Cite

The intention of this research is to explore the feasibility of incorporating aggregates of low or marginal quality, such as Recycled Concrete Aggregate (RCA) and aggregate with high sulphate content, in U-fill mixtures. It has been determined that where RCA is used, water dissipation may be hindered due to the increase in fines caused by abrasion, hence causing an increase in hardening time. To reduce this effect, addition of natural aggregates may be necessary. Moreover, through a series of investigation it has been found that high percentages of sulphate may cause severe damage due to Ettringite and Thaumasite formation; however by incorporation of supplementary materials such as slag the deleterious effects of internal sulphate attack can be reduced. The effects of using Na2SO4 and gypsum in the presence of slag have also been investigated. Results indicated that due to the lower available calcium content within bars containing Na2SO4 expansion rate is low.

show abstract

Section: Effects Of Water To Cement Ratio On Thaumasite Formationmentioning

confidence: 95%

Section: Effects Of Water To Cement Ratio On Thaumasite Formationmentioning

confidence: 99%

Studies on the fresh properties an durability of unshrinkable fill containing recycled concrete aggregate or natural aggregates of marginal quality

Kolahdoozan¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Low w/cm ratio produces concrete with less porosity, and finer and disconnected pore structure which reduces the susceptibility to TSA. For example, Brueckner et al [57] found that the deterioration rate of concrete affected by TSA was directly dependent on the mixture design of concrete and it was significantly reduced with the reduction of w/ cm. Yet, the efficacy of mixture design parameters such as w/cm is a function of curing practices.…”

Section: W/cm and Curingmentioning

confidence: 98%