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This study was carried out to evaluate the influence of addition of a Class C fly ash on concrete permeability. An air entrained reference concrete mixture without fly ash was proportioned to have a 28-day strength of 41 MPa. Concrete mixtures were also proportioned to have cement replacement with f
## By-products related to fuels 97102816 New knowledge about effects of bituminous coal fly ash in concrete Haerdtl, R. ef al. VGB Krafiwerkstech., 1996, 76, (II), 953-956. (In German) The results of studies into the reaction of bituminous coal fly ash in concrete are reported, with specific focus
Fly ash is used in mortar or concrete compositions at an amount of cement/ fly ash weight ratio of 20.5 when the pH of 20% coal ash slurry is >ll.O, cement/fly ash wt. ratio of ~0.7 when the pH of 20% coal ash slurry is ~9.0 but *l.O when the pH of 20% coal ash slurry is >h.O but ~9.0. ## 98199337 N
The main by-product of a saline water beneficiatioun process currently being evaluated by coal-based industries is ettringite (CaizA114(OH)24-(SO4)h S2HzO). The study is aimed to quantify and explain the benefits of using this alkali waste to ameliorate acidic soils, by comparing its effect on plant