| dc.description.abstract | Electric arc furnace reductive slag contains the characteristics of silicon, aluminum, calcium is a multi-type calcium aluminum silicate materials, Si4+, Al3+, Ca2+ in an alkaline solution can be isolated, and the mutual bond formation of Si-O-Si and CSH gel the coexistence composite geopolymer. In this paper, the electric-arc furnace reductive slag produced composite geopolymer mortar specimens for physical and chemical performance and micro explore analysis, and the use of slag to replace the amount of reductive slag to improve the insufficient strength and shrinkage Analysis and Discussion.
The results showed that the strength analysis found that the higher the fineness of grind of reductive slag, the compressive strength has the best range, and mortar specimens curing temperature to improve the compressive strength increases, and the performance of mortar mixing time, the compressive strength increased with the mixing time increase with, but the strength increase of the result is not significant. Slag to replace reductive slag in terms of compressive strength, the slag replaced by the increase in the compressive strength increase, but the setting time decreases.
Microscopic analysis of reductive slag produced composite geopolymer mortar specimens in 8%(by Na2O) of Ca2+ into the cut-off point; To the purely reductive slag in the drying shrinkage test, 8%(by Na2O) cut-off point, Drying shrinkage of more than 8%(by Na2O) percent less than 8%(by Na2O) below the CSH gel was reduced by Ca2+ with AlO4 reaction.; Slag to replace reductive slag, the drying shrinkage with the slag to replace the amount of increase is reduced.
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