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Concrete Mixing and Placing:

concrete: mix,transport, place, and finish
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Advance concrete readymix truck travels to construction site to place cast in place concrete. Concrete drum is rotated slowly at agitation speed to continue its mix and delay set of concrete until it is placed in its forms. Yes, the white lumps in the foreground are yesterday's snow. Ann Arbor, Michigan, March 2007.
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Advance concrete readymix truck travels to construction site to place cast in place concrete. Concrete drum is rotated slowly at agitation speed to continue its mix and delay set of concrete until it is placed in its forms. Yes, the white lumps in the foreground are yesterday's snow. Ann Arbor, Michigan, March 2007.

Advanceconcretereadymixready mixtruckconstructionequipmentcast in placeagitationAnn ArborMichigan2007readymix truck 4170

  • Placing undeground concrete: Concrete bucket is being filled by direct chute from concrete ready mix truck. Caterpillar 345B backhoe has backed down slope toward underground utility tunnel into position to lift concrete bucket and rotate 180 degrees into position to place the concrete in the utility tunnel. Access to the utility tunnel construction is behind backhoe, by ladder. At upper left of photo is cylindrical manhole surface access to tunnel. Mott Childrens Hospital, University of Michigan, Ann Arbor, Michigan, May, 2007.
  • Laydown concrete bucket delivers fresh concrete through its bottom gate valve to worker powered concrete buggy at building floor edge. Worker operates gate valve lever with right hand. Bucket is supported by crane. The natural tilt of the laydown bucket allows it to extend inside the floor edge, held in place by the wire cable perimeter fall protection, in this instance. Worker will push concrete buggy to concrete placement position and tilt it forward to place its concrete, and then return to this point to load additional concrete. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Worker pushes concrete buggy to concrete placement position after filling buggy from laydown concrete bucket at edge of floor. Worker will tilt the buggy forward to place its concrete, and then return to this point to load additional concrete. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Placing basement/foundation wall concrete. Worker on right holds last section hose/tube to direct cast in place concrete into top of wall form, as boom lowers hose/tube into top of form. Worker on left is moving concrete vibrator to extend it down into freshly placed concrete to consolidate the concrete and bond successive concrete lifts. Wall forms are gang forms built from Peri Trio wall form panels lifted into position by crane. Mosher Jordan Renovation and New Dining Center, University of Michigan, Ann Arbor, March 2007.
  • Placing basement/foundation wall concrete. Concrete pump truck boom extends to right to place concrete in wall forms for basement/foundation wall. The pump truck and concrete ready mix trucks are hidden by pile of dirt that will later be used for backfill and landscaping. Mosher Jordan Renovation and New Dining Center, University of Michigan, Ann Arbor, March 2007.
  • Advance concrete readymix truck travels to construction site to place cast in place concrete. Concrete drum is rotated slowly at agitation speed to continue its mix and delay set of concrete until it is placed in its forms. Yes, the white lumps in the foreground are yesterday's snow. Ann Arbor, Michigan, March 2007.
  • Concrete construction: Attendees test drive Multiquip Whiteman Series and Wacker ride-on power trowels for finishing concrete slabs. World of Concrete/Masonry, Las Vegas, Nevada January 2006.
  • Allen Engineering Razorback Rider mechanical drive riding trowels sit on trailer awaiting use in finishing reinforced concrete elevated slabs of building. Monroe Pointe Building, Denver, Colorado, December, 2006.
  • Allen Engineering Razorback Rider mechanical drive riding trowel is lifted by crane to finish reinforced concrete elevated slabs of building. A tag line/rope is hanging from its left side to allow workes on ground to guide it into position. Monroe Pointe Building, Denver, Colorado, December, 2006.
  • Allen Engineering Razorback Rider mechanical drive riding trowel is being set by crane on top of reinforced concrete elevated slab of building to produce a trowelled finish. Another riding trowel is already being used, in left background. Monroe Pointe Building, Denver, Colorado, December, 2006.
  • Placing concrete with concrete pump: Concrete shoots out end of elephant trunk in a stream of concrete directed by the worker at the left into wood forms, where it joins with the reinforcing steel to create horizontal foundation beams. To the right a second worker inserts and withdraws a flexible concrete vibrator that helps consolidate the concrete. Behind him a worker carries on his back the motor that drives the vibrator. <br /> In background is temporary support wall, consisting of vertical steel soldier piles/beams that support wood breast boards that support the soil of the vertical soil embankment at the edge of the excavation. Soldier beams are supported at mid-height against lateral movement of soil by steel rod tiebacks, shown here with orange steel plates. Colorado Street, Denver, Colorado, December 4, 2006.
  • Concrete construction/readymix/placement: Advance front-discharge ready-mix concrete truck delivers and places concrete in trench. The mechanisms that position the concrete placing chute are all controlled by the truck driver from his driving position, which allows him to continually position truck and chute in the best placement location while placing concrete. <br /> Chute control mechanisms include the following: 1. Top of chute, where concrete is fed into chute, can be rotated horizontally through 180+ degrees with horizontal chain drive around chute top gear, to place concrete at any angle to side or in front of truck. 2. Hydraulic piston at vertical angle from truck front center supports and positions 1st section of chute vertically. 3. Hydraulic pistons parallel to chute on both sides at joints between sections 1 and 2 and sections 2 and 3 fold chute up out of driver's way when truck is driven to and from job. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Concrete construction/readymix/placement: Advance front-discharge ready-mix concrete truck delivers and places concrete in trench. The mechanisms that position the concrete placing chute are all controlled by the truck driver from his driving position, which allows him to continually position truck and chute in the best placement location while placing concrete. <br /> Chute control mechanisms include the following: 1. Top of chute, where concrete is fed into chute, can be rotated horizontally through 180+ degrees with horizontal chain drive around chute top gear, to place concrete at any angle to side or in front of truck. 2. Hydraulic piston at vertical angle from truck front center supports and positions 1st section of chute vertically. 3. Hydraulic pistons parallel to chute on both sides at joints between sections 1 and 2 and sections 2 and 3 fold chute up out of driver's way when truck is driven to and from job. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Concrete construction/readymix/placement: Advance front-discharge ready-mix concrete truck delivers and places concrete in trench. The mechanisms that position the concrete placing chute are all controlled by the truck driver from his driving position, which allows him to continually position truck and chute in the best placement location while placing concrete. <br /> Chute control mechanisms include the following: 1. Top of chute, where concrete is fed into chute, can be rotated horizontally through 180+ degrees with horizontal chain drive around chute top gear, to place concrete at any angle to side or in front of truck. 2. Hydraulic piston at vertical angle from truck front center supports and positions 1st section of chute vertically. 3. Hydraulic pistons parallel to chute on both sides at joints between sections 1 and 2 and sections 2 and 3 fold chute up out of driver's way when truck is driven to and from job. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Concrete construction/readymix/placement: Advance front-discharge ready-mix concrete truck delivers and places concrete in trench. The mechanisms that position the concrete placing chute are all controlled by the truck driver from his driving position, which allows him to continually position truck and chute in the best placement location while placing concrete. <br /> Chute control mechanisms include the following: 1. Top of chute, where concrete is fed into chute, can be rotated horizontally through 180+ degrees with horizontal chain drive around chute top gear, to place concrete at any angle to side or in front of truck. 2. Hydraulic piston at vertical angle from truck front center supports and positions 1st section of chute vertically. 3. Hydraulic pistons parallel to chute on both sides at joints between sections 1 and 2 and sections 2 and 3 fold chute up out of driver's way when truck is driven to and from job. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Cast-in-place concrete construction, reinforced: In lower half of photo, bent end of rebar is used to pull up bottom rebar in trench during concrete placement to achieve necessary concrete cover under rebar to protect it from soil/moisture/salts and produce bond between concrete and steel. Concrete is being placed through chute from ready-mix concrete truck. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Cast-in-place concrete construction, reinforced: In center of photo, at far end of trench, bent end of rebar is used to pull up bottom rebar in trench during concrete placement to achieve necessary concrete cover under rebar to protect it from soil/moisture/salts and produce bond between concrete and steel. In addition, worker uses shovel to support rebar while concrete is placed. Concrete is being placed through chute from ready-mix concrete truck. Depot Street, Ann Arbor, Michigan, October, 2006.
  • Concrete construction equipment: Schwing truck mounted concrete pump and 32 ft hydraulic boom travels along north side of Danube River at end of day. Budapest, Hungary July 2006.
  • Concrete construction/placement, foundation: Construction of cast-in-place concrete mat foundation for air terminal. Left side shows massive one-day concrete placement for south half of terminal. Placement is by five Schwing long-boom concrete pumps fed by a continuous stream of readymix concrete trucks. Readymix trucks drive a loop, arriving full southbound and leaving empty northbound. Placement is near its end, with only the westmost portion being placed. On right side of photo is uncompleted reinforcing steel for north half of the foundation. Reinforcing bars are lifted from temporary storage on far side of foundation excavation and placed by the Manitowoc crawler mounted open lattice boom cable operated crane. Normal airport operations continue as usual on the runways and facilities in the background. North Terminal Project, Detroit Metro Airport, Romulus, Michigan, August 2006.
  • Concrete construction/placement, foundation: Construction of cast-in-place concrete mat foundation for air terminal in massive one-day concrete placement for south half of terminal. Placement is by five Schwing long-boom concrete pumps fed by a continuous stream of readymix concrete trucks. Readymix trucks drive a loop, arriving full southbound and leaving empty northbound. Placement is near its end, with only the westmost portion being placed. Normal airport operations continue as usual on the runways and facilities in the background. North Terminal Project, Detroit Metro Airport, Romulus, Michigan, August 2006.
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