高炉水砕スラグの水熱硬化体

概要

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The hydrothermal reaction of the granulated blast furnace slag was investigated without the stimulators such as lime etc. The reaction proceeded gradually at 180℃, and the compressive strength of the cured bodies was 810kg/cm^2 by treatment for 24h at 200℃, When cured at 250℃, the compressive strength reached to the maximum value after 6h, and decreased gradually by longer treatment. By determining the unreacted slag and the ignition loss, it was seen that in curing at 200℃ and 250℃, the reaction took place rapidly until 6h, and then slowed down after about a half of the slag reacted. From the results of X-ray, DTA and chemical analysis, the reaction product in the cured slag was considered as plazolite, i. e., a kind of hydrogarnet. And from the observation of its texture, it was found that the unreacted slag particles remained scattered in matrix in 6h curing at 250℃, but they were broken in so long time curing as 24h, and also its compressive strength decreased simultaneously. Further, it was possible to prevent the depression of the strength by adding quartz sand as fine aggragate.
東海大学の論文