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Showing 1 to 10 of 10 for “"Pozzolans"”.
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Freeze-Thaw Resistance and Microstructural Characteristics of Concretes Containing Pozzolans
… of FA and MK and to assess the effects of such pozzolans on freeze-thaw durability, air void system and microstructure of hardened concrete. Cement was partially replaced by various quantities of the pozzolanic materials. The results demonstrated that the increase in workability attributed to …
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The Durability of Mortar with Ground Clay Brick as Partial Cement Replacement
… of low calcium glass make very effective pozzolans. Bricks with high calcium glass or a low proportion of glass should not be used as pozzolans. Small amounts of sulphate in ground brick do not have any serious deleterious effects on ground brick mortars and can be beneficial. It is …
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Influencia de las adiciones puzolánicas en los morteros de restauración de fábricas de interés histórico-artístico
… doubtful advantages, and using high reactivity pozzolans like MK in restoration mortars, may be dangerous too. Advantages and disadvantages of using plasticizing or tixotropic clays, like sepiolite, were commented. Misappropriation of the classic Fratini test for pozzolanity measuring in non …
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Analysis of Contaminants on Ground Glass Pozzolan and the Effects on Pozzolan Performance in Mortar
… of carbohydrates on the surfaces of the glass pozzolans. Results indicate carbohydrates to be the primary contaminant on the recycled glass surface, with glucose being a confirmed contaminant using GC-MS. Using the contaminant concentrations determined through analytical techniques, …
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Characterisation and properties of alkali activated pozzolanic materials.
… of low calcium fly ashes. These form very poor pozzolans and the alkali activation of the fly ash offers the opportunity for the large scale use of fly ash. Water glass was selected as a suitable activator for the fly ash. A comprehensive series of tests have been carried out to gain information …
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Physical Sulphate Attack on Concrete
… Although partial replacement of cement with pozzolans also decreased the pore volume, surface scaling increased due to the increased proportion of small diameter pores and the associated growth of capillary suction and surface area for evaporation. Epoxy- and silane-based surface treatment …
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Latent heat storage in concrete
… of PCM's without carriers; (iv) the use of pozzolans to modify concrete to permit use of alkali sensitive PCM's; (v) development of theoretical considerations of PCM diffusion in concrete and the determination of absorption characteristics; (vi) development of technique for defining …
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Transport and sorption phenomena in concrete and other porous media
… to study the effect of different cements and pozzolans on chloride ingress into concrete. <br> RI:3, The models established in RI:1 and P:1 are used to study the effect of curing conditions on chloride ingress in concrete. A drying period before exposure to chlorides is shown to decrease the …
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Synergistic and Environmental Benefits of Using Cement Kiln Dust With Slag and Fly Ash in Cemented Paste Tailings
… tailings specimens containing Portland cement-pozzolans binders confirmed the possibility of the presence of un-reacted or un-hydrated particles of slag and fly ash in such matrices. In the present study, SEM was carried out on cemented paste tailings samples to investigate the effect of using …
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Macro - and Microstructure Evaluation and Field Applications of Concrete with Recycled Glass Pozzolan
… conforms to ASTM C-618 specifications for pozzolans and is produced from recycled mixed-color glass, which currently has no value-added real market application except as filler material. In the USA about 12 million annual tons of glass are discarded (~30% recycled). In NYC about 200,000 …