Properties Of HighÂlime Fly Ash Concrete :: Concrete

PROPERTIES OF HIGH lime FLY ASH CONCRETEABSTRACTFly ash is a waste product from coal based caloric power stations. almost seven million tons of fly ash is being produced per annum from these thermal power stations in Turkey. Concerted efforts be postulate to make the material used to a great extent.These paper fall apart the results of an investigation on the performance of fly ash concrete make with ASTM C class fly ashes from two sources. PC42,5 cement used in the experiments conforms to TS19 (Turkish Standards).A comparison between concretes with and without fly ash was provided for various aspects. on the whole the concrete mixtures contained polyhydroxy carbon salt plasticizer which complies with ASTM C 494-81 Type D. Their workabilities were unplowed constant.As freshly-mixed concrete properties slump, unit weight, air content, setting time and shed blood values were determined.As mechanical properties compressive strength and were measured after 24 hours, 7, 28 and 90 days.Durability in terms of freezing and melting resistance (ASTM C 666 Procedure A), and permeability were also investigated.Keywords Fly ash, concrete properties, binder material, micro-structureSenel Artirma, Geophysics Engineer, Quality Assurance Manager of Nuh Beton Ready-Mixed Concrete Company, Turkey.Erdem Tandirli, gracious Engineer, Quality Control Chief of Nuh Beton Ready-Mixed Concrete Company, Turkey.11. INTRODUCTIONenvironmental hazards and over-comsumption of energy resources has been and still are the most concerning issues for the modern world. In this extol the usage of fly ash which is a waste product of the thermal power stations by ready-mixed concrete industry as a binder material can be an effective way both(prenominal) of decreasing the ash discharge out to the environment and of cement use of goods and services thus of saving the resources on a national scale.From the concrete technologys shoot of view, the usage of fly ash causes qualitative changes in concrete properties. The get along to whether these changes were improvement or not can be given just now by knowing the intentions of usage.For this purpose fly ashes were added both in plus to and as a substitute for some part of the cement, and fresh and rigid concrete properties were investigated.2. EXPERIMENTAL STUDIES2.1 Materials2.1.1 CementThe cement used is Turkish, portland cement (PC 42.5) and comforms to Turkish standart TS19 while approximately corresponds to ASTM C 150-89 Type I. Its chemical composition, and principal compounds are summarized in Table 1.a, physical and mechanical properties in Table 1.b along with standart limits.Table 1.a Chemical properties of cementChemical CompositionComponents, %PC 42.5TS 19ASTM Type ISiO221.16--Al2O33.60--Fe2O34.50--CaO64.90--MgO1.205 max.