1、 KS D 2120KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS KS D 2120: 2007 2007 7 31 http:/www.kats.go.krKS D 2120: 2007 : () ( ) () ( ) : (http:/www.standard.go.kr) : :1973 1 17 :2007 7 31 20070472 : : ( 025097274) (http:/www.kats.go.kr ). 7 5 , . KS D 2120: 2007 Molding natural sand and silica sand , 1976
2、 KS D 2120( ) 1976 KS D 2121( ) . 1 2 % ( .) 2 % ( .) . 2 . . KS A 5301, KS F 2104, KS L 1618 1, 1: KS L 3128, 3 1) 4 , 48 270 6 . 2) 3) 6 , 10 200 10 . 4 2 % 1 4 , 2 6 . , 4) 2 % . 1) 2 % , . 2) . 3) . 4) KS A 5301 , , 20 m . KS D 2120: 2007 2 1 : % 1 2 3 4 2 10 10 20 20 30 30 40 2 : % SiO2Fe2O3Al2
3、O3CaOMgO 1 98 0.5 1.0 1.0 2 96 98 1.0 2.0 1.5 3 93 96 1.5 4.5 2.0 4 90 93 2.0 6.0 2.5 5 85 90 3.0 8.0 3.0 6 70 85 5.0 15.0 5.0 5 3 4 . 6 , 2 1 2 10 65 1.5 % . 3 m a % 48 65 100 150 200 420(35) 297(48) 210(65) 149(100) 105(150) 297(48) 210(65) 149(100) 105(150) 74(200) 210(65) 149(100) 105(150) 74(20
4、0) 53(270) 270 74(200) 53(270) 30 ( ) . a 5 . KS D 2120: 2007 3 4 m a % 3 % 10 2 380(8) 1 680(10) 1 190(14)14 1 680(10) 1 190(14) 840(20)20 1 190(14) 840(20) 590(28)28 840(20) 590(28) 420(35)35 590(28) 420(35) 297(48)40 48 420(35) 297(48) 210(65)65 297(48) 210(65) 149(100)100 210(65) 149(100) 105(15
5、0)150 149(100) 105(150) 74(200)200 105(150) 74(200) 53(270)30 70 ( ) . a 5 . 5 m 10 1 680 14 190 20 840 28 590 35 420 48 297 65 210 100 149 150 105 200 74 270 53 6 m % 10 , 14 , 20 , 28 , 35 25 105 2 48 , 65 , 100 20 53 1 150 20 53 2 200 6 6 % , 0.5 % . KS D 2120: 2007 4 7 7.1 KS L 3128 . 7.2 KS F 2
6、104 . 7.3 KS A 5301 . 7.4 KS L 1618 1 . , . 8 ( 1 0.1 % , 10 kg .) 7. , 4. 6. . 9 , , , ( ) . 7 , , ( ) . 7 2 28 50 % 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS D 2120: 2007 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Molding natural sand and silica sandICS 77.080.10