KR850005384A - Method of manufacturing crushed stone for concrete - Google Patents

Abstract

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Description

Manufacturing method of concrete crushed stone

As this is a public information case, the full text was not included.

Claims (19)

2 to 10% by weight of iron oxide having an average particle size of 20 µm or less and 0.2 to 0.5% by weight of silicon carbide having the same particle size or lignin, polyvinyl alcohol carboxymethyl cellulose, Select at least one member from the group consisting of styrene-butadiene-type latex, add 0.1 to 2% by weight, and then finely grind the resulting mixture to a particle size of 15 μm or less and give a constant humidity to the ground mixture. Method of producing a crushed stone for concrete having a light weight, characterized in that it comprises the step of baking the pellet obtained by adding water soaked and pelletized wet mixture to carry. The method of claim 1, wherein the shale is pulverized to a particle size of 15μm or less. The method of claim 1, wherein each of the iron oxide and silicon carbide has an average particle size of 10 μm or less. The method according to claim 1, wherein the iron oxide is ferric tetraoxide. The method of claim 1 wherein said at least one member is added at a rate of 0.1 to 1.0 weight percent. The method of claim 1, wherein the styrene-butadiene type latex is one member selected from the group consisting of LX531B, Croslene, Onoda SXB, J.S.R.0670. The method of claim 1 wherein the grinding product is finely ground to an average particle size of 10 μm or less. The method of claim 1, wherein the fine grinding is performed for 30 to 1 hour. The method of claim 1 wherein said roasting step is performed at a temperature of 1050 ° C to 1120 ° C. 10. The method of claim 9 wherein said roasting step is performed at a temperature of 1100 ° C to 1115 ° C. The method of claim 1 wherein said roasting step is performed with a holding time of 20 to 30 minutes in the roasting fishery. 2 to 10% by weight of iron oxide having an average particle size of 20 μm or less and 0.2 to 2.5% by weight of silicon carbide of the same size or lignin, polyvinyl alcohol, carboxymethyl cellulose, Selecting at least one member from the group consisting of styrene latex, adding 0.1 to 2% by weight, and then wetting the resulting mixture with a constant humidity to pellet the wet mixture to roast the pellets. Method for producing a crushed concrete for light weight, characterized in that. 13. The method of claim 12, wherein each of the iron oxide and silicon carbide has an average particle size of 10 µm or less. 13. The method of claim 12, wherein said iron oxide is ferric oxide. 13. The method of claim 12, wherein said at least one member is added at a ratio of 0.1 to 1.0 weight percent. The method of claim 12, wherein the styrene-butadiene type latex is one member selected from the group consisting of LX531B, Croslene, Onoda SXB, J.S.R.0670. 13. The method of claim 12, wherein said roasting step is performed at a temperature between 1050 ° C and 1120 ° C. 13. The method of claim 12, wherein said roasting step is carried out at a temperature of 1100 ° C to 1115 ° C. 13. The method of claim 12, wherein said roasting step is performed with a retention time maintained for 20 to 30 minutes in the roasting zone. ※ Note: The disclosure is based on the initial application.