Supernatant nanographite solution for advance treatment of C class fly ash cement systems – Part 1
![10 The effect of nG contents on the fluidity of ASTM I, ASTM I/nG, FA–C and FA–C/nG mortars [w/c = 0.76, w/s = 0.16, c/s = 0.21]](/uploads/images/2015/w300_h200_x400_y252_101544979_30ba446e57.jpg)
![11 Compressive strength gain effects of nG, Ratio of compressive strength gain = 100x (Strength of mix with nG / strength of control mix) [w/c = 0.76, w/s = 0.16, c/s = 0.21]](/uploads/images/2015/w300_h200_x400_y252_101544970_2a4c94ba6f.jpg)
This paper examines the effects of extremely dispersed nG by ultrasonication on the CFA-C system. CFA-C systems blended with nG and ultrasonicated nG are developed and some problems in the CFA-C system, such as delaying of setting time and reduction of strength gain at early ages, are overcome. Experimented properties of CFA-Cs and pure Portland cements are the absorbance spectra of ultrasonicated nG, contents of CH, setting times, fluidities, and compressive strengths according to present standard methods. Part 1 discusses introduction, materials and methods, whereas Part 2 will focus on the results and conclusions.
1 Introduction
Researches suggest replacing the CFA for ordinary Portland cement in mortars, pastes and concretes due to pozzolanic activity of CFA and sustainability of pure Portland cement. The conventional CFA-C system is also developed by scientists, researchers and cement manufacturers. This conventional CFA-C system exhibits such negative side effects as slow setting time and low strength gain at early ages although CFA has a pozzolanic and hydraulic effect on cement. In order to increase CFA use in cement, more than ever, there is a need to improve these aforementioned negative side...
