The sulphoaluminates of calcium

Lerch, William; Ashton, F. W.; Bogue, R. H.

doi:10.6028/jres.002.020

Cited by 45 publications

(22 citation statements)

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“…Kalousek [1] proposed that SO 4 2-ions present in cement eventually enter CSH and experimental studies [74] [75] have demonstrated that sulphate can bind to CSH.…”

Section: Sulphatementioning

confidence: 99%

Binding mechanisms of radionuclides to cement

Evans

2008

Cement and Concrete Research

137

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Radionuclide solubility is one of the factors that can determine the 'source term' for potential migration to the far field. Hence, the mechanisms of immobilisation of radionuclides in cements need close study in order to quantify the nature of the binding. The nature of the binding forces in a cement matrix is very species sensitive, so it is difficult to produce a general description. This review summarises the main sorption mechanisms and then details immobilisation mechanisms for many elements.

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“…Kalousek [1] proposed that SO 4 2-ions present in cement eventually enter CSH and experimental studies [74] [75] have demonstrated that sulphate can bind to CSH.…”

Section: Sulphatementioning

confidence: 99%

Binding mechanisms of radionuclides to cement

Evans

2008

Cement and Concrete Research

137

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“…Lerch and coworkers (Lerch et al, 1929;Lerch, 1946) reported that sulfate could bind into calciumsilicate-hydrate gel structure to form a new phase, called 'phase X'. Kalousek and Adams (1951) suggested that 'phase X' is a gel containing all the oxide constituents of cement.…”

Section: Introductionmentioning

confidence: 98%

Adsorption behaviour of sulfate in early cement hydration

Qian

Yan

et al. 2015

Advances in Cement Research

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This paper investigates the adsorption behaviour of sulfate on calcium-silicate-hydrate (C-S-H) gel, which is significantly related to cement hydration and delayed ettringite formation. Aqueous sulfate solution from cement paste and prepared calcium-silicate-hydrate samples are used to take other ions and cement hydration into account.The effects of gypsum content, temperature and alkalinity on dissolution and adsorption behaviours of sulfate in cement paste are studied. The results show that higher gypsum content leads to more sulfate ions adsorbed on samples. Sulfate adsorption on calcium-silicate-hydrate samples increases with temperature elevation, which is in agreement with both Divet's and Š kapa's results, which used relatively simple calcium-silicate-hydrate-sulfates systems. Higher alkalinity is unfavourable for sulfate ions adsorbed on calcium-silicate-hydrate samples. An alternative opinion was given by Divet and Randriambololona whose result is complex and not representative owing to the adsorption behaviour of sodium ions being neglected.

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“…The literature on this subject is not extensive. Lerch, Ashton, and Bogue (1929) evaluated the relationship between these two compounds in pure-phase aqueous systems. They found ettringite to be the most stable phase as long as there were sulfate ions in solution, Roberts (1962) investigated the stability of pure chloroaluminate exposed to solutions containing both calcium sulfate and calcium sulfate plus calcium hydroxide.…”

Section: Introductionmentioning

confidence: 99%

Stability of Calcium Chloroaluminate and Calcium Sulfoaluminate Phases in Hydraulic-Cement Mixtures

Poole¹

1993

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The sulphoaluminates of calcium

Cited by 45 publications

References 0 publications

Binding mechanisms of radionuclides to cement

Binding mechanisms of radionuclides to cement

Adsorption behaviour of sulfate in early cement hydration

Stability of Calcium Chloroaluminate and Calcium Sulfoaluminate Phases in Hydraulic-Cement Mixtures

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