THE CONCRETE BRIDGE MAGAZINE

SUMMER 2011

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

Issue link: http://www.aspiremagazinebyengineers.com/i/306186

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C R E AT I V E C O N C R E T E C O N S T R U C T I O N 12 | ASPIRE , Summer 2011 T he challenges of incorporating brick on concrete bridges can be overcome b y i n s t a l l i n g t h i n b r i c k s e m b e d d e d i n t o t h e c o n c r e t e . T h i s i s e a s i l y d o n e w i t h templates that fit into the concrete forms. T h i s s y s t e m w a s u s e d o n t h e 1 8 8 - f t - l o n g , t w o - s p a n M a r g a r e t S t r e e t Bridge over Highway 36 in North St. Paul, Minn. and on the 247-ft-long Valley Creek Ro a d B r i d g e o v e r I - 4 9 4 i n Wo o d b u r y, M i n n . O f f i c i a l s a t t h e M i n n e s o t a D e p a r t m e n t o f Tr a n s p o r t a t i o n wa n t e d t o m a i n t a i n b o t h n e i g h b o r h o o d 's a e s t h e t i c s a n d m a k e t h e b r i d g e s a p p e a r m o r e l i k e a c i t y s t r e e t t h a n a s t a n d a r d c o n c r e t e bridge. Lunda Constr uction in Black River Falls, Wis., built both bridges. T h e d e s i g n t e a m h a r m o n i z e d t h e a p p e a r a n c e w i t h t h e e n v i r o n m e n t b y u s i n g b r i c k a c c e n t s o n fa s c i a , p i e r s , a n d d e c o r a t i v e c o l u m n s . T h e y a l s o wa n t e d t o avoid the disr uptions to traffic caused by laying up brick and the need to maintain i t t h r o u g h t h e y e a r s w i t h t u c k p o i n t i n g a n d r e p l a c e m e n t s c a u s e d b y p i e c e s dislodging due to traffic vibrations. D e s i g n e r s s e l e c t e d a r e u s a b l e v e r t i c a l e m b e d d e d - b r i c k s y s t e m t h a t s p a c e s t h i n b r i c k f o r c a s t - i n - p l a c e c o n c r e t e a p p l i c a t i o n s . T h e s y s t e m c o n s i s t s o f a p l a s t i c t e m p l a t e t h a t h o l d s t h e t h i n b r i c k s , u s i n g s n a p - t o g e t h e r i n t e r l o c k i n g ta bs to create the desired brick pattern in t h e a p p r o p r i a t e s i z e a n d s h a p e . R u b b e r gasket s firmly hold the brick in place. D e s i g n e r s u s e d M a i n S t r e e t R e d b r i c k f r o m M e t r o B r i c k i n C a n t o n , O h i o . O n c e t h e c o n c r e t e h a r d e n e d , t h e f o r m s a n d p l a s t i c b r i c k t e m p l a t e w e r e p u l l e d a wa y, a n d t h e f i n i s h e d b r i c k f a c e w a s p o w e r- washed with 180 °F water to r emov e any mor tar leakage or residue. The system has been used on a variety o f v e r t i c a l c a s t - i n - p l a c e c o n c r e t e a p p l i c a t i o n s , i n c l u d i n g r e t a i n i n g w a l l s and highway overpasses. _ _ _ _ _ _ Buck Scott is president of Scott System Inc. in Denver, Colo. Thin Brick on Cast-in-Place Concrete by Buck Scott, Scott System Inc. Providing thin brick on all four sides of a column, even up to the edge, can be accomplished with the plastic templates, as seen on the right. When the forms and template are pulled away, the thin brick is left embedded in the concrete. Photo: Minnesota Department of Transportation. Photo: Karlson Forming Supply Co. The 4-ft-square decorative columns along the bridge's railings provide an aesthetic accent that was created by embedding thin brick into a plastic template placed on the interior side of cast-in-place forms. Photo: Karlson Forming Supply Co. Book_Sum11.indb 12 7/1/11 9:59 AM

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