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Development of Manufacturing Process
for Blast Furnace Slag Coarse Aggregate
with Low Water Absorption

JFE Technical Report - ISSN 1883-7263

No.23 March 2018 - Special Issue on “Steel Sheet for Can-making”, “Steel Bar and Wire Rod” and “Slag Products”

Development of Manufacturing Process for Blast Furnace Slag Coarse Aggregate with Low Water Absorption

TA YasutakaTOBO HiroyukiWATANABE Keiji

Abstract

Due to the high porosity of blast furnace slag coarse aggregate (BFG), it is difficult to control the water content of the concrete where the BFG is used. JFE steel has been developing a pan type continuous slag solidification (PACSS) process to reduce water absorption ratio of BFG under 1%. In this process, molten slag is poured into mold, and the slag is solidified at the thickness of 20 mm to 30 mm before the gas in the slag is generated and produced. The process results in the reduction of the porosity of slag. A pilot plant was constructed, and production of BFG under 1% became possible using this plant.

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