Effects of Cerium Concentration and Solvent on Physical and Chemical Characterization of Rapid Setting Cement

Motny, Riyadh M.; Phongikaroon, Supathorn

doi:10.1080/00295450.2018.1510698

Cited by 4 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in heat rate presented in Figure 6b is due to an acceleration of hydration in the cemented waste samples due to the presence of cerium (Ce) in the waste that interacts with aluminate and silicate in the clinkers to form new phases like CeAl 11 O 18 and Ce 4 . 667 (SiO 4 ) 3 O [41]. In addition, the sulfate content of the waste could cause high reactivity in clinkers and SCMs, thus leading to additional heat release.…”

Section: Hydration Heat Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study of Potential Delayed Ettringite Formation in Cemented Nuclear Wasteforms

Danfour,

Perko,

Seetharam

et al. 2023

Sustainability

View full text Add to dashboard Cite

This paper presents a numerical study to investigate delayed ettringite formation (DEF) that may pose a long-term durability risk by altering the microstructure with consequent swelling leading to cracking. A chemo–thermal model is used to predict the evolution and distribution of temperature and hydration phases in a wide range of blended cements. In particular, the influence of nuclear waste loading, waste package size, and the addition of supplementary cementitious materials (SCMs) on DEF is systematically and numerically investigated. The analyses show that higher amounts of ordinary Portland cement (OPC) and waste loadings result in higher hydration temperatures and consequently increased DEF potential by enhancing sulfoaluminate dissolution and hydrogarnet precipitation. Partial replacement of OPC with SCMs reduced hydration heat and mitigated DEF risks. The analysis indicated that the DEF evolution may be different for waste packages of different sizes due to a shift from sulfate-controlling to aluminate-controlling reactions at high temperatures. Interestingly, higher temperatures did not necessarily induce higher DEF potential due to the excessive precipitation of aluminates in the form of hydrogarnet. This research enriches our understanding of DEF’s complex behavior, providing valuable insights for engineering applications beyond civil engineering, such as nuclear waste conditioning.

show abstract

Section: Hydration Heat Evolutionmentioning

confidence: 99%

“…clinkers to form new phases like CeAl11O18 and Ce4.667 (SiO4)3O [41]. In addition, the sulfate content of the waste could cause high reactivity in clinkers and SCMs, thus leading to additional heat release.…”

Section: Hydration Heat Evolutionmentioning

confidence: 99%