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Showing 1 to 13 of 13 for “"PULVERISED FUEL ASH"”.
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Glass ceramics from a South African pulverised fuel ash
… generation of electricity by the combustion of pulverised coal produces large quantities of coal ash (PF A). The disposal of this ash lias become a matter of concern due to the unsightly and hazardous nature of the PF A, and it has been the subject of intense investigations into its suitability …
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The mineralogy and chemistry of pulverised fuel ash produced by three South African coal-burning power stations
… compositions are presented for 63 pulverized fuel ash (PFA) and 16 input coal samples collected from Lethabo, Duvha and Matla power stations over the period 1987-1988. Bulk chemical composition was determined by X-ray fluorescence spectrometry. The mineral concentrations were determined by …
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A factorial approach to the study of alkali-silica reaction in concrete
… content of the Portland cement (b) the use of pulverised fuel ash as a cement replacement material (c) the amount of reactive aggregate (d) the free water content of the mix In addition, the use of pulverised fuel ash as an admixture and the different effects produced by the two most commonly …
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Developing sustainable and environmentally friendly building materials in rammed earth construction
… dumping it in otherwise agricultural landmass. Pulverised Fuel Ash and Palm Kernel Shells were identified as wastes to be disposed in rammed earth. Pulverised Fuel Ash, a by-product of industrial furnace is found in abundance in developed countries that burn carbonaceous materials in power …
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ΔΙΕΡΕΥΝΗΣΗ ΤΗΣ ΔΥΝΑΤΟΤΗΤΑΣ ΧΡΗΣΙΜΟΠΟΙΗΣΗΣ ΤΗΣ ΙΠΤΑΜΕΝΗΣ ΤΕΦΡΑΣ ΠΤΟΛΕΜΑΙΔΟΣ ΣΤΑ ΑΣΦΑΛΤΟΜΙΓΜΑΤΑ
… AND PERMEABILITY OF ASPHALT CONCRETE CONTAINING PULVERISED FUEL ASH(OR FLY ASH) OF PTOLEMAIDA -GREECE. THE ASPHALT CONCRETE CONTAINS FLY ASH AS APARTIAL REPLACEMENT OF LIMESTONE FILLER. THE EVALUATION OF THE PROPERTIES, MENTIONED ABOVE, IS CARRIED OUT USING 3 TESTS. 1) MARSHALL TEST 2) CREEP TEST …
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Some aspects of P.F.A. in concrete.
The use of pulverised fuel ash (p.f.a.) in concrete has been the subject of widespread discussion and debate in recent years. One of the principal problems of using this material is its variability in quality with respect to both source and power station load. The object of this investigation is to …
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Crystallisation of PFA glasses
… and MgO-CaOAI20rSi02 systems were made, using pulverised fuel ash and silica, hydrated lime, kaolin and magnesium carbonate. Titania or ferric oxide and chromia were used as nucleants. Various crystallisation heat treatments were carried out and the nucleation and crystallisation behaviour was …
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Behaviour of lightweight concrete beams strengthened with carbon fibre reinforced polymer in shear
… lightweight concrete (LWC) beams, which use Pulverised Fuel Ash (Lytag) instead of normal aggregates, retrofitted to increase shear capacity with epoxy bonded FRP have not been studied comprehensively to understand the characteristics of FRP/ lightweight concrete joining and the shear …
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The use of Lethabo field 2 PFA in pavement quality concrete
… and low skid resistance. The inclusion of Pulverised Fuel Ash (PFA), otherwise known as fly ash, generally improves the quality of pavement concrete and thus extends its useful life. The PFA used for the thesis was from the Lethabo power station's second electrostatic precipitator field …
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Factors influencing the strength development in pfa-lime systems
Pulverised fuel ash (pfa) has been mixed with lime and water, pressed into cylinders, and cured in 100% r.h. at temperatures of 50°C, 75°C and 95°C for times of between 30 minutes and 28 days.<br/><br/>The expansion of the cylinders and their unconfined compressive strengths have been measured at …
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The performance of a blended PFA/GGBS alkali-activated concrete using a silica fume-based activator
… sodium hydroxide solutions. In doing so, various pulverised fuel ash and ground granulated blast furnace slag blends were investigated as a replacement binder to Portland cement among number activator dosages, w/b ratios, workability retaining admixture dosages on the short (compressive strength, …
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Development of a new test protocol for the permit Ion migration test
… materials, such as microsilica (ms), pulverised fuel ash (pfa) and ground granulated blast furnace slag (ggbs), in addition to normal Portland cement (ope) as a control. In this investigation, not only the tests identified in the initial investigation were used, but also were …
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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.
… finally a combination of 1% SP and pulverized fuel ash (Pfa) at 20% of the cement weight was employed for all mixes. Grout tests have included two point workability tests by the Viskomat NT, flow time funnel test, Colcrete flow meter test, and water bleeding test. After that, eighteen grout …