1、 c I | : 0451- 0712(2001)04- 0052- 07 m s | :TU593 D S M :B Z b r / 赵 筠( “ v V ) g 100027)K 1 : ) Z b y o K v Y r P p 1 5 ,8 1 / n a p 0 r / 1 p,i 5 M = y 4V ! 9 P p 100j120 M Z B r / S b1 o M : ? r ; 0 ; K ; p ; o 0 ; A x ; Z ; b0 Z b o , o 0 1 i r = V , K , P p b Z Z ( h ), Y r p 1 F % 30 M = b s
2、b Y Y r B ,5 a b o 0 1 K , B d y ,y 10j20 M 1 f d R b r 0 a o K m ,* 20 W 60 M X 7 S b H S av y ! B H , C l 5 : 1 ? Y ,1 B b , o 1 r y K ,i r 7 , rB p 5 M bV 70 M , d C r a p aE 4 # ! / , B K 7 S H W , i a 4 r T V b20 W 80 M * 7 S , d K b) / / / V ? C f b1.2 b = 1 r _ Q , 3 , P r a pH 8.5j9, 1 a , v
3、 r s Y ,V b1.3 r B o 0 io 0 V r B i , P , K b) Z (l :2001- 02- 10 2001 M 4 4 HIGHWAYApr.2001No.4 b r , o 0 1 r K K y K 1 y b2 Z b K / n 2.14 r k V , P 1 a r , o i , r V 12mm = o 0 c 25j50mm S 1by N , “ , r l 38mm,K z l 50mmbI n , ! 9 4 65mmb2.2 E 4E 4 ? E o 0 b E 4 H P 1 i r , E 4 b b Ca(NO2)2 $ E 4
4、 r E q ,F y K 7 S K q ,h l K Z b2.3 p V T , K ( b p e z , ? K 7 S , K 7 S K q F y ,y p T V , “ V b p , e B 4 5 E _ r p , p V s b2.4 r V p r V p V o 0 1 i q q r n bp S K ? a 0 a 0 K ? a a“ Q ;N , ? r M 6 , b3Z b ? r p 3.1 r p Q r P p B Q ,B V :V g P s Y P P ? 7 l y H W b aF % V P p , N E s L b Z b ,y
5、 K B r K * K y , r P p $ l K 7 S H W , 80M 7 S y ! v : + Z , v B ,100 M! 9 p K 7 S H W b 7 , K V s , K ? K Z (m1)b ? r , K ? V vv , K Z 9 ,y x A U 2,3: ? r ,+ Y c A xH , E q , H r , K v ,3 K Z by N ,“ - _ | P p Q Z , P p r C V n ? H W , c ? Z bF ? x 5 v k ,s Z b c A x ? r ? r v , “ -i53i2001 M 4 u :
6、 Z b r / 2: 1 z V 0.20mm, K q V by N , N z = , ? r ? 0 o d r b3.3r 50j100 M P p , ? r a z 1 p r p r / 5 1 5 , 1 v k 4 ,y E y ,y N | B N V b“ - r p bK u ? r ! 9 m vw i 50 M 100 M P p r a z r F 1 p(n V 1)bV 1 0 r 50 M 100 M P p w iK l HPC 4 ) K v 1w/b A x 9 % K v z mmK l /mm100 M 50 MK l nullmmv u ) A
7、2 0.40 5j100.40 25 20 160.20 15 15 -v / u ) A30.40 5j100.30 35 25 160.20 30 20 -0.35 5j100.30 30 25 160.20 25 20 -Z w u ) A40.40 6j100.30 60 45 200.20 50 40 160.35 6j100.30 55 40 200.20 45 35 160.30 6j100.30 45 35 200.20 35 30 16 b u ) A50.40 6j100.30 60 45 200.20 50 40 160.35 6j100.30 55 40 200.20
8、45 35 160.30 6j100.30 45 35 200.20 35 30 16 : ) s :A0- d K ;A1- K ;A2- K ;A3- K ;A4- d Z K ;A5- d b K b4Z b ? r / 1 p Z b , ! 9 P p = ( 50 M a100 M . 120 M ) ? 3 K ,“ ! 9 , r / S / S T ? b4.1K r o 0 a a F 4 r o 0 9 ,B ? V r C 0.1%j0.3%b4.2K r K v 1 1 1 “ r 1 i ,B K 1 0.35j0.45, r ) 0 8 b4.3K r o 0 1
9、 i qK S 4 S k Z E 1 b P S :(1) K o 0 H W 1 i -F k Z E ,B | k q HW , | k q mm k “ is o 0 c , N r F o 0 1 i ? b k T 9 V 9 o 0 “ bP v B K S(W n L 2)b(2) K r o 0 “ - 1.010- 12m2/s,5 W k Z E N , Y V Fick B = p9 “ b(3) K r Y V - 1 p i54i 2001 M 4 1000C, V k Z E S ASTM C1202AASHTO T227 y o 0 1 i k b k W k
10、, k T “ W M 1 z ,i O e y , b S k , r F o 01 i ? ) s n V 2bV 2 y o 0 1 i k (ASTM C1202 AASHTO T227) r s 5Y V /C o 0 1 i r 4000 1 (0.6 ) Y r2000j4000 1 (0.5j0.6) Y r1000j2000 1 (0.4 / ) Y r100j1000 d r ; 1 A x r ( A x C 5%j15%); = r b50MPa 0.045mm 0.045mm 70%a z c 300 320 310x /% 10 12.1 12.5 A x /% 5
11、 8 8 817.1 17.1 /% 25o 0 c /% 50MPa C Y C /25%j35%x Y C /65%j75% ? C 350kg/m3450kg/m3 x 45kg/m3x 275kg/m3 A x S ENV197- 1 4.7c1 p A x 340kg/m3 ,Y V a k o 0 c 275 324 295 380x (Danaske)/% 340 388 360 472.5o 0 c /% - 3.0m) u ,? 75mmb w u u ,1 p 50mmb z e 0.2mm = , w u(S -3.0 +6.0) b B (P)9 e , l :9 M
12、r L = F 1 K v b w u1 pP0.7; u 1 pP1.0; 6m ( 57.0m )1 pP1.3b 4 y 20 W 90 M V vZ , o 0 K T Y r p K 1 y I n , ( ? r / Z , v : + Z , v B H p B b “ - T L l ( V : Z b , ? r / Z H V L a L 6 b I D :1ACI 201-GuideToDurableConcrete. 1998.2HighPerformanceConcreteHandbook-Materialsandi58i 2001 M 4 c I | : 0451-
13、 0712(2001)04- 0059- 04 m s | :U414.01 D S M :BHF- h E 4 C F 黄学文1, 张正锋2, 王旭东3(1. 8 ) y ! g g 230051; 2. g C ! 9 g g 230051;3. v y ! “ v B s g 310012)K 1 : C ) C F C l C , B HF- h E 4 C F V E h l ? 3 b T ? T b1 o M : C F ; HF- E 4 ; ? ; 0 - , w r , d 9 T X S T 75%, C F y l :2001- 02- 11Applications(i
14、nSwedish). 1998.3L. Dunaszegi. mHPC for Durability of theConfede-ration Bridge. HPCBridgeViews,1999, 5.4SwedishBuilding Centre.mHighPerformanceConcrete Structures-Design Handbook.Printedby ElandersSvenskt AB,Stockholm2000.5 ACI 234R-96. Guidefor theUseof SilicaFume in Concrete. Reported by ACICommit
15、tee234.6W.F. Price. mHigh PerformanceConcreteinPractice. Presented at the 22nd AnnualConvention of the Institute of ConcreteTechnology, 1994.7CEB Bulletin dInformation 222.mApplication ofHighPerformanceConcrete:GreatBeltLink-Denmark. 1994.8KlausFalbe-Hansen, etal. mConcretefortheOresundBridge. Concr
16、ete, 1998.Reinforcement Corrosion Prevention for Concrete StructuresExposed to Marine and Deicing Salt EnvironmentZhao Jun(Elkem Beijing Representativeoffice, Beijing100027,China)Abstract: Tocounterthemainproblems that chloride-induced reinforcement corrosion substantiallydecreasesthelifetimeofconve
17、ntionalconcretestructuresof engineeringinhostilemarineanddeicingsaltenvironment, themethodsforcorrosionprevention, definitionoflifetime, technicalrequirementsforhigh-durableconcreteandconcretespecifications for4marinebridges, completed in last 5years, with designlifetimeof 100j120yearshavebeenreviewed.Key wouds: High performance concrete; Durability; Reinforcement corrosion; Structure lifetime;Chloride; Microsilica; Marineenvironment; Deicingsalt 2001 M 4 4 HIGHWAYApr.2001No.4
