High alumina cement application

Risch A, Pollmann H, Ecker M (1997) Application of Portland cement and high alumina cement for immobilization/solidification of a waste model composition. Proceedings of the 10th ICCC, Goteborg, Sweden, vol. 4,4iv044,8 pp... 

One of the most celebrated examples of the application of DTA and DSC to material science, which had a public impact some 30 years ago, is shown in Figure 5. It relates to the use of high alumina cement which in some circumstances led to the weakening and in extreme cases the... 

The incorporation of phosphates in formulations with calcium aluminate cements (high-alumina cements) has not met with any marked success, but they may have application as biomaterials (Section 12.14). 

High alumina cement is used in mortars for refractory brick walls and in refractory concretes when mixed with special aggregate, like corundum or fire clays. At present the application of high alumina cement is, in general, very restrained it is limited to non-structural elements and to refractory structures where there is no risk of high humidity. Other applications are in repair where rapid hardening is required (Barnes and Bensted 2001). 

The first applications of glass fibres in concrete-like composites were published by Biryukovitch et al. (1965), who carried out tests on elements with high alumina cement. The paste made with that cement is characterized by pH from 11.8 up to 12.05 with total amount of alkalis from only 0.15% to 0.20% and during hydration calcium hydroxide does not appear. In the... 

Robson, T. D., The Characteristics and Applications of Mixtures of Portland and High-Alumina Cements, Chem. andind., 1 2-7 (1952)... 

Brown, R. A., and Cassel, B., High Alumina Cements Background and Application of Thermal Analysis Methods, Lab., 9 45-56 (1977)... 

Considerable development has occurred on sintered ceramics as bone substitutes. Sintered ceramics, such as alumina-based ones, are uru eactive materials as compared to CBPCs. CBPCs, because they are chemically synthesized, should perform much better as biomaterials. Sintered ceramics are fabricated by heat treatment, which makes it difficult to manipulate their microstructure, size, and shape as compared to CBPCs. Sintered ceramics may be implanted in place but cannot be used as an adhesive that will set in situ and form a joint, or as a material to fill cavities of complicated shapes. CBPCs, on the other hand, are formed out of a paste by chemical reaction and thus have distinct advantages, such as easy delivery of the CBPC paste that fills cavities. Because CBPCs expand during hardening, albeit slightly, they take the shape of those cavities. Furthermore, some CBPCs may be resorbed by the body, due to their high solubility in the biological environment, which can be useful in some applications. CBPCs are more easily manufactured and have a relatively low cost compared to sintered ceramics such as alumina and zirconia. Of the dental cements reviewed in Chapter 2 and Ref. [1], plaster of paris and zinc phosphate... 

Refined calcined alumina is commonly used in combination with high purity limestone [1317-65-3] to produce bigb purity calcium aluminate cement (CAC). The manufacture, properties, and applications of CAC from bauxite limestone, as weU as bigb purity CAC, has been described (104). High purity CAC sinters readily in gas-fired rotary kiln calcinations at 1600 —1700 K. CAC reactions are considered practically complete when content of free CaO is less than 0.15% andloss on ignition is less than 0.5% at 1373 K. 

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