KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS L 3129 KS L 3129 :2010 2010 7 27 http:/www.kats.go.krKS L 3129:2010 : ( ) ( ) LH () ()KCC () ( ) : (http:/www.standard.go.kr) : :1974 12 12 :2010 7 27 2010-0289 : : ( 02-509-7300) (http:/www.kats.go.kr). 10 5 , . KS L 3129:2010 Testing method for coefficient of linear variation of refractory mortar 1 . 2 . . ( ) . KS L 3127, 3 1 1 50 kg , 4 2 5 kg . 4 4.1 . a) 2 kg KS L 3127 100110 , 40 mm40 mm160 mm . b) , . c) 140150 mm , ( ) 1) . 4.2 . 1) 0.05 mm .