If the Contractor elects to use fly ash and/or GGBFS as a partial substitute for Portland cement in the concrete mixture, the maximum substitution rates must not exceed 30 percent for fly ash, 40 percent for GGBFS, and 40 percent if both fly ash and GGBFS are used (if both are used, the maximum fly ash content cannot exceed 15 percent).
Fly Ash. Approved Class C or Class F fly ash may be used to replace a maximum of 25 percent of the Portland cement on a pound for pound basis in all concrete. Ground Granulated Blast Furnace Slag. Approved GGBFS may be used to replace a maximum of 30 percent of the Portland cement on a pound for pound basis in all concrete.
characteristics of fly ash based geopolymer concrete cube in which there is 100 percent replacement of cement with fly ash which is used as an alternative binder material.
Samples were prepared with three cement and fly ash contents and tested for compression and flexural strength. Length changes specimens were also produced and the resilient modulus was measured. Mixtures achieving 150 and 300 psi are capable of being produced with 4 to 8 percent portland cement and 10 to 20 percent class C fly ash.
Feb 21, 2017· While fly ash serves as an additive in the production of Portland cementbased concrete products, it tends to make up only about 30 percent of the solid material. Alternatively, fly ash provides nearly 100 percent of the solids in Acrete for the end product without the addition of cement.
Oct 04, 2014· Geopolymer product uses 100 percent flyash Post to Facebook 'Green' concrete technology earns LA StartUp Prize Geopolymer product uses 100 percent flyash Check out this story on ...
Oct 01, 2014· QPL 50 Fly Ash Fly Ash: 10/1/2014 ... Liquid MembraneForming Compounds for Concrete Curing: 10/1/2014: QPL 66 Plastic Culvert Pipe and Joint Systems ... QPL 78 Zinc Paint Sys for New Struct Steel and 100 Percent Bare Xisting Struct Steel ...
strength and durability properties of the concrete. This had been achieved through the use of waste such as fly ash, recycled aggregateand, crumb rubber glass to mention just a few [35]. Apart from the above mention waste materials, there exist little studies on coconut shell as aggregate replacement in concrete .
set governmental targets for utilization of MSWI bottom ash, the target being 85 percent in Denmark and close to 100 percent in The Netherlands, whereas the actual .
Nov 12, 2009· While most companies that use fly ash use it replace between 30 and 60 percent of the Portland cement needed, one company, Ceratech, offers a wide range of cement products (below) that are completely free of Portland cement. Ceratech's products contain 35 to 95 percent industrial waste like fly ash and wood ash.
Jul 28, 2010· How much fly ash can we feasibly use in concrete? Kueber explains that fly ash has been used in concrete since the 1930s. Currently, when used in highway concrete, it makes up about 5 percent to 15 percent of the total cementitious material used.
Uses Industrial Waste: Instead of a 100 percent Portland cement mixture, green concrete uses anywhere from 25 to 100 percent fly ash. Fly ash is a byproduct of coal combustion and is gathered from the chimneys of industrial plants (such as power plants) that use coal as a power source.
"Structural Applications of 100 Percent Fly Ash Concrete." Paper presented at World of Coal Ash, Lexington, Ky. Skipper, Ashley. 2014. "Performance of Geopolymer Cement Concrete in Flexural Members." Master's thesis, University of North Carolina at Charlotte.
This paper, which forms part of the UNEP White Papers series on EcoEfficient Cements, provides a brief discussion of the class of cementing materials known as 'alkaliactivated binders', which are identified to have potential for utilization as a key component of a sustainable future .
(iii) Portland Pozzolana cement with fly ash content up to 20% by weight. (iv) Portland slag cement. However most commonly used cement for the cement concrete road construction is ordinary Portland cement of 43 Grade.