In extensive areas of the West-Central portion of the United States and Canada, many clays and soils occur which contain several per cent. of sulfates, particularly sodium sulfate. The action of these "alkali" soils on portland cement mortar or concrete results in the conversion of the hydrated calc
Sorption/desorption of cesium in sulfate-resistant Portland cements
β Scribed by S. M. Steinberg
- Publisher
- Springer
- Year
- 2005
- Tongue
- English
- Weight
- 355 KB
- Volume
- 264
- Category
- Article
- ISSN
- 1588-2780
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Sulfate resistance of Portland-pozzolanic cements, prepared by gradual replacement of Portland cement by pozzolana, were studied in relation to their transverse strengths. Common clay and China clay, after calcination, were used as two different pozzolana. Strengths of samples, after curing separa
Cubes of a sulfate-resisting Portland cement (SRPC) paste that had been stored for 6 months in solutions of Na2S04 or MgS04 were examined by scanning electron microscopy using backscattered electron imaging and X-ray microanalysis. The changes observed were broadly similar to those which we have fou
Portland cement and high alumina cement mortar specimens were exposed to cycles of drying at 40 Β°C, cooling at 20 Β°C and immersion in Na 2 SO 4 and MgSO 4 solutions at 20 Β°C. The resistance of mortars was evaluated by visual inspection and by measuring the change in surface hardness and weight of th
A sulfate-resisting Portland cement and pastes made from it were studied by X-ray microanalysis of polished sections in the scanning electron microscope, X-ray diffraction and thermal analysis. The ferrite phase had the approximate composition Ca2AI0.8Fe0.8Mg0.2Si0.205 with minor substitutions of Fe