1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS F 2731 KS F 2731:2008 (2013 ) 2008 12 30 http:/www.kats.go.krKS F 2731:2008 : ( ) ( ) ( ) ANC ( ) ( ) : (http:/www.standard.go.kr) : : 2003 11 19 : 2008 12 30 : 2013 10 08 : 2013 0524 : ( 02-509-7290) (http:/www.kats.go.kr). 10 5 , . KS F 2731:2008 (2013
2、) Testing method for velocity of ultrasonic pulses to conclude compressive strength of concrete 1 1.1 . 1.2 , , . 1.3 . , . 2 . . ( ) . KS F 2403, KS F 2405, KS F 2418, KS F 2422, 3 3.1 1 , ( , ), , , . , , . KS F 2418 . 3.2 (zero setting) KS F 2731:2008 2 . . . . . . 1 , . . 3.3 . 2 . 2 25 ms 100 m
3、s . 3.2 . . . 0.5 % . 3.4 1 % . . 4 4.1 2 . 2 . , KS F 2731:2008 3 . 2 4.2 . 4.2.1 , , , . , . 4.2.2 . , . , . 150 mm . 4.2.3 , . , . . 5 5.1 . TLV = (1) V : (m/s) L : (m) T : (s) ( .) 6 6.1 . 6.2 KS F 2731:2008 4 . , . 1 % 50 m/s 100 m/s , . , . 1 % % 60 40 20 0 4 5 2 0 0.5 1.5 4 1.7 0 1 7.5 2 kHz
4、in km/s Vc 3.5 Vc 4.0 Vc 4.5 mm 24 54 82 150 146 65 43 23 167 74 49 27 188 83 55 30 6.3 1 . 6.4 . 6.5 20 mm 100 mm , 20 mm 40 mm 150 mm . 6.5 2 . 6.6 6.6.1 . KS F 2731:2008 5 . 6.6.2 . , . Vc(km/s) (2) . Vs Vc . )(4222 LTVaaVVssc -+= (2) Vs: (m/s) a : (mm) T : (s) L : (mm) , (2) . )()(21cscsVVVVLa+-
5、 (3) . a/L 0.25 . a/L 0.15 , 12 mm . 6 mm . (2) Vs . (2) (4) . Vc KVm (4) Vm : (L/T, km/s) K : )1(2 2gg -+=LaK scVV=g r 54 kHz , Vc 3 . Vc r 3 (4) K . Vc . a 2 . a , (5) . )1(1 g-= LLK s (5) KS F 2731:2008 6 Ls: (mm) Vc 3 % . L Lsba0 10 20 30 40 503.03.54.04.55.0Vc(km/s)= V c/V s (mm)0.50.60.70.80.9
6、1.0 3 00.60.70.80.91.00.05 0.10 0.15 0.20 0.25 0.30K=Vc/V ma/L=0.90.80.70.6 4 6.6.3 , d( 5 f1 f2) . , . 54 kHz , 20 mm . 20 mm 50 mm Ls . 6.6.2 5 r K . (mm) KS F 2731:2008 7 Ls= 1 2L10 20 30 40 503.03.54.04.55.0Vc(km/s)= V c/V s (mm)0.50.60.70.80.91.0 5 7 7.1 . , . 7.2 . . 7.2.1 4 (batch) , 6.4 6.5
7、. KS F 2403 . 3 . 7.2.2 , . (605) %, (202) 2 . 7.2.3 KS F 2405 . 3 5 % . . 7.2.4 . . 7.3 . (mm) KS F 2731:2008 8 7.3.1 7.3.2 . . 7.3.2 4 3 , . KS F 2422 . 7.3.3 . . 8 8.1 . 9 . a) , b) c) d) e) ( ) f) ( , , , ) g) h) ( , , ) i) , , j) , k) l) KS F 2731:2008 9 KS F 2731:2008 , . 1 1.1 . , . , , , . . pulse-echo . . signal . . , . . 1.2 2003 : 2008 : KS A 0001: 2008( ) 2 1. 1.1 . 1.2 , , . 1.3 KS F 2731:2008 10 , . 2. . 3. 3.1 KS F 2418 . 3.2 (zero setting) . CRT