Interaction of cement and radioactive waste forms in multicomponent systems tests at 200°C Part 1: Leaching and Sorption of cesium, strontium and actinides

Heimann, Robert B.

doi:10.1016/0008-8846(88)90073-7

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Tests in which concretes were leached at loo"-200°C with either distilled water or Standard Canadian Shield Saline Solution in contact with a sodium-bentonite, a waste-glass, or a silica-fume additive, have indicated that the identity and concentration of species in solution is time-dependent (Khomameni and , Burnett et al, 1985, Heimann and Hooton 1986, Heimann, 1988a The fate of CSH and the cement minerals, and their interaction with the aggregate, are a function of time, temperature, solid and aqueous solution compositions, and the availability of water. Of particular concern to the degradation of concrete is whether the concrete is exposed to air, COz, or water, the aluminate and ferrite content of the cement, and the activities of carbonate and sulfate content of the water.…”

Section: Engineered Materials Characterization Report 5-71mentioning

confidence: 99%

Engineered materials characterization report, volume 3 - corrosion data and modeling update for viability assessments

McCright¹

1998

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Section: Engineered Materials Characterization Report 5-71mentioning

confidence: 99%

Engineered materials characterization report, volume 3 - corrosion data and modeling update for viability assessments

McCright¹

1998

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“…Tests in which concretes were leached at 100° to 200°C with either distilled water or Standard Canadian Shield Saline Solution in contact with a sodium-bentonite, a waste glass, or a silica fume additive have indicated that the identity and concentration of species in solution is time-dependent (Burnett et al, 1985;Heimann, 1988aHeimann, , 1988bHeimann and Hooton, 1986;Komarneni and Roy, 1983). The fate of C-S-H gels and the cement minerals and their interaction with the aggregate are a function of time, temperature, solid and aqueous solution compositions, and the availability of water.…”

Section: Cementitious Materialsmentioning

confidence: 99%

Near-field/altered-zone models report

Hardin¹

1998

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Mineralogy and Chemistry of Cements

Heimann

2010

Classic and Advanced Ceramics

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In the hierarchical materials triangles (see Figure 1.6 ), cements are shown to belong to the group of hydraulic ceramics , also termed chemically bonded ceramic s ( CBC s), to indicate that they obtain their properties not by thermal processes (as do ceramics, sensu strictu ), but rather by their reaction with water. Moreover, the product of this reaction is stable against further reaction with water. This type of hydraulic reaction was fi rst utilized many centuries ago by the Romans, who mixed hydraulic volcanic ash (pozzolan) with lime, sand and crushed rock to yield " opus caementicium , " from which expression the term " cement " was derived. Artifi cial hydraulic " Roman cement " was fi rst developed in Britain by James Parker in 1796. For this, the septarian concretions of organically derived calcite nodules, embedded in marine mudstones, were burned; subsequently, when the burned product was ground to a fi ne powder and mixed with sand, the mixture set hard in about 15 minutes. Earlier observations by John Smeaton, in relation to the construction of the famous Eddystone Lighthouse in the English Channel between 1755 and 1759, revealed that the " hydraulicity " of the then -available hydraulic lime mortars was directly proportional to the clay content of the precursor limestones. Armed with this knowledge, Smeaton selected those mortars for the lighthouse construction that would set and develop a reasonable strength during the 12 -h period between successive high tides.In 1824, Joseph Aspdin patented a hydraulic material, obtained by burning of an intimate mix of chalk and clay, that he called " Portland cement, " on the basis that the set product was similar in appearance to the prestigious Portland limestone. The strength of the mortar made from early Portland cement was rather low, however, owing to the fact that Aspdin had fi red the mixture at a temperature well below 1250 ° C. Such a temperature was too low to obtain alite (Ca 3 SiO 5 ) which, in modern Portland cements, is responsible for early strength (see Figure 5.2 ); instead, the reaction yielded essentially belite ( β -Ca 2 SiO 4 ), which develops its strength more slowly owing to a delayed hydrolysis. The situation was remedied in 1844, simultaneously by Isaac Johnson, Louis Vicat, and Joseph Aspdin ' s son, William, when the high -temperature Portland cement that they produced 119 5 Classic and Advanced Ceramics: From Fundamentals to Applications. Robert B. Heimann

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Interaction of cement and radioactive waste forms in multicomponent systems tests at 200°C Part 1: Leaching and Sorption of cesium, strontium and actinides

Cited by 4 publications

References 13 publications

Engineered materials characterization report, volume 3 - corrosion data and modeling update for viability assessments

Engineered materials characterization report, volume 3 - corrosion data and modeling update for viability assessments

Near-field/altered-zone models report

Mineralogy and Chemistry of Cements

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