Topic
Ettringite
About: Ettringite is a research topic. Over the lifetime, 2702 publications have been published within this topic receiving 67056 citations. The topic is also known as: woodfordite.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the authors investigated the working principle upon the accelerating-retarding effect of triethanolamine dosage on the initial setting time of hydrated cement and found that the accelerating retraining effect is caused by the different intensity of formed ettringite.
83 citations
TL;DR: In this paper, the compressive strength of a cementitious binder based on calcined phosphogypsum, flyash, hydrated lime and portland cement was studied at room temperature and at 50 °C in over 90% RH.
83 citations
TL;DR: In this paper, a commercial Portland cement paste was fabricated as ∼200-g cylinders to a water/cement weight ratio of 0.50, and cylinders were additionally cured at ∼20°C and 85°C, both ±2°C.
83 citations
01 Jan 1992
TL;DR: A review and analysis of the available literature pertaining to the causes, effects and prevention of secondary (delayed) ettringite in concrete is presented in this paper, where the critical factors that determine extent of damage due to secondary ETTringite formation are (a) duration of delay period before heating the concrete; (b) severity of the heating and/or cooling regime; and (c) the SO3/Al2O3 ratio of the cement.
Abstract: The report comprises a review and analysis of the available literature pertaining to the causes, effects and prevention of secondary (delayed) ettringite in concrete. Over 300 publications have been examined. Case studies of damage in concrete possibly caused by secondary ettringite formation are examined first. Fundamental research on secondary ettringite formation, its chemistry, and deposition mechanisms is then reviewed. Key investigations on the topic are analyzed in detail. Next, the potential importance of (a) method of heat-curing and (b) the chemistry of cement is outlined. In the final chapter, a rapid test for evaluation of potential secondary ettringite susceptibility (the "Duggan" test) is evaluated. The analysis indicates that there appears to be a potential for a secondary ettringite formation problem in North America; it is highly probable that secondary ettringite formation can lead to significant deterioration of heat-treated concrete. However, it is unlikely that secondary ettringite formation is, or will be, the sole mechanism responsible for premature deterioration. The critical factors that determine extent of damage due to secondary ettringite formation are (a) duration of delay period before heating the concrete; (b) severity of the heating and/or cooling regime; and (c) the SO3/Al2O3 ratio of the cement. There is no evidence that non heat-treated concrete is susceptible to this phenomenon. Further research and improvements to the Duggan test may result in the development of a useful standard test method to assess the long-term dimensional stability and durability of concrete.
83 citations
TL;DR: In this article, self-cementitious properties of fly ash from circulating fluidized bed combustion boiler co-firing coal and high-sulphur petroleum coke (CPFA) were investigated.
83 citations