Properties Of HighÂlime Fly Ash Concrete :: Concrete

PROPERTIES OF HIGHLIME FLY ASH concreteABSTRACTFly ash is a waste product from scorch based thermal power move. About seven million heaps of tent flap ash is being produced annually from these thermal power stations in Turkey. Concerted efforts atomic number 18 needed to make the material employ to a great extent.These paper give the results of an investigation on the carrying into action of fly ash concrete made with ASTM C class fly ashes from two sources. PC42,5 cementum used in the experiments conforms to TS19 (Turkish Standards).A comparison in the midst of concretes with and without fly ash was provided for various aspects. All the concrete mixtures contained polyhydroxy carbon common salt plasticizer which complies with ASTM C 494-81 Type D. Their workabilities were kept constant.As freshly-mixed concrete properties slump, unit of measurement weight, air content, setting time and bleeding values were determined.As mechanized properties compressive strength and wer e measured after 24 hours, 7, 28 and 90 days. strong suit in terms of freezing and thawing resistance (ASTM C 666 result A), and permeability were also investigated.Keywords Fly ash, concrete properties, binder material, micro-structureSenel Artirma, Geophysics Engineer, attribute Assurance Manager of Nuh Beton Ready-Mixed Concrete Company, Turkey.Erdem Tandirli, Civil Engineer, Quality Control psyche 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 respect the usage of fly ash which is a waste product of the thermal power stations by ready-mixed concrete industry as a binder material shtup be an effective way both of decreasing the ash drop off out to the environment and of cement consumption thus of saving the resources on a national scale.From the concrete technologys point of view, the usage of fly ash causes qualita tive changes in concrete properties. The answer to whether these changes were improvement or not can be given only by knowing the intentions of usage.For this object fly ashes were added both in addition to and as a supplant for some part of the cement, and fresh and hardened concrete properties were investigated.2. EXPERIMENTAL STUDIES2.1 Materials2.1.1 cementumThe 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, animal(prenominal) 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.