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Showing 1 to 6 of 6 for “"Superplasticizers"”.
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Interactions Between Portland Cements and Carboxylated and Naphthalene-Based Superplasticizers
In the final part of this study, the relation between the concrete slumps and the paste rheology is established. However, concretes required much less superplasticizer than paste to be dispersed. The differences in the shear history between the concretes and the pastes possibly explain such …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… rheology of portland cement paste incorporating superplasticizers were also investigated. Results suggested that polycarboxylate-based superplasticizers should be used at a dosage close to the saturation in order to ensure adequate rheological behaviour at high temperature and prolonged mixing …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… rheology of portland cement paste incorporating superplasticizers were also investigated. Results suggested that polycarboxylate-based superplasticizers should be used at a dosage close to the saturation in order to ensure adequate rheological behaviour at high temperature and prolonged mixing …
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Evaluating CEN/TS 12390-9 To Assess Concrete for UK Freeze-Thaw Exposure Conditions
… than 250 µm apart. Development of 3rd generation superplasticizers combined with air entrainers, both air and non-air entrained concretes had a spacing factor value less than 250 µm (and for most concretes <100 µm), however many of the non-air entrained concretes did not achieve an Acceptable …
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Estudio sobre la aplicabilidad de los modelos de cálculo de la fluencia y retracción al hormigón autocompactable
… of additions, the paste volume is larger, the superplasticizers content is high, and the maximum diameter of the gravel is smaller. These modifications in the composition of the mixture affect the behavior of the concrete in its hardened state, including the shrinkage and creep deformations. It …
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Rheology of grout for preplaced aggregate concrete. Investigation on the effect of different materials on the rheology of Portland cement based grouts and their role in the production of preplaced aggregate concrete.
Preplaced aggregate concrete (PAC) is produced by grouting high workability cement based grouts among the voids of compacted coarse aggregate mass. Because of its low shrinkage, PAC has been used for many repair jobs like; tunnel lines, dams and bridge piers. Moreover, it has been used for …