Dramix® Steel Fibers § BEKAERT - Kathy Pecora Web …kcpecora.com/Bekaert.pdf · Dramix® Steel...
4
Dramix® Steel Fibers § BEKAERT better together Geologic profile of the 11 mile long tunnel alignment The San Vicente Pipeline is a raw water transmission pipeline of the San Diego County Water Authority's Emergency Storage Project. The pipeline links San Vicente Reservoir, located on the east side of the County, and the Water Authority's second aqueduct, located on the west side of the County. The project involves the construction of an eight and one-half foot diameter water pipeline in an eleven mile long tunnel. The tunnel was excavated in extremely variable geologic conditions consisting of strong granitic and metamorphic rocks, weak sedimentary rocks, abrasive conglomerates and mixed face conditions. Groundwater levels vary along the tunnel alignment ranging from below the tunnel invert to about 110 feet above the tunnel invert. Approximately 60 percent of the tunnel is below the groundwater level, although groundwater levels in only about 20 percent of the tunnel are more than 50 feet above the tunnel invert. The design of the tunnel liner was prepared by Jacobs Associates and required conventional rebar reinforced precast concrete segments as an initial liner. An eight and one-half foot inside diameter steel carrier pipe was to be built within the liner and the annulus between the steel pipe and the concrete segments was filled with concrete. The precaster, Traylor Shea Ghazi Precast, proposed to redesign segments to utilize steel fiber reinforcement. Their designer, Halcrow, provided detailed design calculations and drawings to eliminate the entire rebar cage and use 50 Ib/yd3 of steel fibers that provided a residual flexural strength of 435 psi. Since the liner was to be grouted in-situ during mining and backfilled with concrete, the joints would not be gasketed. This allowed the Traylor Shea Ghazi Precast to use vertical segment moulds and self compacting concrete. Incite automatic dosing system for Dramix steel fiber addition Self consolidating concrete is used in casting the vertically molded segments There were several "firsts of a kind" on this project in the US: • First application of steel fiber reinforced self compacting concrete • First use of steel fiber only reinforcement in precast segments Challenge: The precast plant produced approximately 66,000 individual segments using over 33,000 cubic yards of concrete. Production took 15 months. Cost savings Faster segment production Less damage of segments during installation Solution: Dramix® RC-80/60-BN Lining Thickness: Tunnel Diameter: Tunnel Length: Concrete Strength: Fiber Dose: 7 inches (177 mm) 11.67 feet (3.6 m)n O.D. 58,080 feet (17.7 km) 6,000 psi (41 Mpa) SCC 50 Ib/yd3 (30 kg/m3) Vacuum mechanism is used to lift and rotate seaments Dramix® is a registered trademark of the N.V. Bekaert S.A. Zwevegem, Belgium. Modifications reserved. Alt details describe our products in general form only. January 2007, Editor: Jeff Rodencal, Marietta 2006; All Bekaert company names are trademarks owned by NV Bekaert SA Zwevegem - Belgium North America: Bekaert Corporation 1395 S Marietta Pkwy Marietta. Georgia 30067 Tel. (800) 372-6940 Fax (770) 426-8107 Other countries: N.V. Bekaert S.A. Bekaertstraat 2 - 8550 Zwevegem, Belgium Tel. (0) 56/76 69 86 Fax.(O) 56/76 79 47 Website: www.bekaert.com/building Contact us at: [email protected] Dramix'
Transcript of Dramix® Steel Fibers § BEKAERT - Kathy Pecora Web …kcpecora.com/Bekaert.pdf · Dramix® Steel...
Dramix® Steel Fibers § BEKAERTbetter together
Geologic profile of the 11 mile long tunnel alignment
The San Vicente Pipeline is a raw water transmission pipeline of theSan Diego County Water Authority's Emergency Storage Project. Thepipeline links San Vicente Reservoir, located on the east side of theCounty, and the Water Authority's second aqueduct, located on thewest side of the County. The project involves the construction of aneight and one-half foot diameter water pipeline in an eleven mile longtunnel.
The tunnel was excavated in extremely variable geologic conditionsconsisting of strong granitic and metamorphic rocks, weak sedimentaryrocks, abrasive conglomerates and mixed face conditions. Groundwater
levels vary along the tunnel alignment ranging from below the tunnel invert to about 110 feet above the tunnel invert. Approximately 60percent of the tunnel is below the groundwater level, although groundwater levels in only about 20 percent of the tunnel are more than 50feet above the tunnel invert.
The design of the tunnel liner was prepared by Jacobs Associates andrequired conventional rebar reinforced precast concrete segments asan initial liner. An eight and one-half foot inside diameter steel carrierpipe was to be built within the liner and the annulus between the steelpipe and the concrete segments was filled with concrete.
The precaster, Traylor Shea Ghazi Precast, proposed to redesignsegments to utilize steel fiber reinforcement. Their designer, Halcrow,provided detailed design calculations and drawings to eliminate theentire rebar cage and use 50 Ib/yd3 of steel fibers that provided aresidual flexural strength of 435 psi. Since the liner was to be groutedin-situ during mining and backfilled with concrete, the joints would notbe gasketed. This allowed the Traylor Shea Ghazi Precast to usevertical segment moulds and self compacting concrete.
Incite automatic dosingsystem for Dramix steelfiber addition
Self consolidating concrete is used incasting the vertically moldedsegments
There were several "firsts of a kind" on this project in the US:• First application of steel fiber reinforced self compacting concrete• First use of steel fiber only reinforcement in precast segments
Challenge:
The precast plant produced approximately66,000 individual segments using over 33,000cubic yards of concrete. Production took 15months.
Cost savingsFaster segment productionLess damage of segments during installation
Solution:Dramix® RC-80/60-BN
Lining Thickness:Tunnel Diameter:
Tunnel Length:Concrete Strength:
Fiber Dose:
7 inches (177 mm)11.67 feet (3.6 m)n O.D.58,080 feet (17.7 km)6,000 psi (41 Mpa) SCC50 Ib/yd3 (30 kg/m3)
Vacuummechanism
is used tolift androtate
seaments
Dramix® is a registered trademark of the N.V. Bekaert S.A. Zwevegem, Belgium. Modifications reserved. Alt details describe our products in general form only.January 2007, Editor: Jeff Rodencal, Marietta 2006; All Bekaert company names are trademarks owned by NV Bekaert SA Zwevegem - Belgium
North America:Bekaert Corporation1395 S Marietta PkwyMarietta. Georgia 30067Tel. (800) 372-6940Fax (770) 426-8107
Other countries:N.V. Bekaert S.A.Bekaertstraat 2 - 8550Zwevegem, BelgiumTel. (0) 56/76 69 86Fax.(O) 56/76 79 47
Website:www.bekaert.com/building
Contact us at:[email protected]
Dramix'
Dramix® Steel Fibers BEKAERTbetter together
Clarin is a large manufacturer of various cosmetics. This facility is intended to expand their warehouse and distribution capacity. Thefloor-on-ground slab is subject to automatic guided vehicle (AGV) traffic throughout a 25-foot tall storage rack system. After the floor isplaced, a wire system will be installed along the center aisles to guide lift truck traffic.
A Crown Automatic Guided Vehicle(AGV) is used to access products inClarin's existing warehouse anddistribution facility. Similar equipmentwill be installed in the new addition.
The contractor partitioned the floorinto four areas. Each areaconstituted one day's work.Craftsmen are preparing area one onthe morning of the first day.
Design specifications called forcompletion of roof constructionprior to start of slab placement. Theroof deck along with side-walltarpaulins helped protect the youngconcrete during placement
Dramix Steel fibers were conveyorfed to the concrete trucks onsite.Each 10 yard load was convenientlyloaded with ten 50 Ib. bags ofDramix8.
Finishing operations included power "pizza pan" and rotating blade trowels(above) and a walk-behind power trowel (left). Note that pan floats were usedto establish flatness (Fmin = 50) and the blade trowels were used for highquality finishing.
Challenge: Solution:
While the laser screed team was completing placement activities on thefourth day, craftsmen sawcut floor joints in area three which was placedduring day number three.
North America:Bekaert Corporation1395 S Marietta PkwyMarietta, Georgia 30067Tel. (800) 372-6940Fax (770) 426-8107
Capability to withstand AGV traffic Dramix® RL 45/50 BN
Project Size:Floor Thickness:
StrengthJoint Spacing:
Fiber Dose:
60,000 ft2
9 inches4,500 psi15 - 18 ft on center50 pcy
Dramix® is a registered trademark of the N.V. Bekaert S.Af Zwevegem, Belgium. Modifications reserved. All details describe our products in general torm only.February 2007, Editor: Jeff Rodencal, Marietta 2006; All Bekaert company names are trademarks owned by NV Bekaert SA Zwevegem - Belgium
Other countries:N V Bekaert S A.Bekaertstraat 2 - 8550Zwevegem, BelgiumTel. (0) 56/76 69 86Fax.(O) 56/76 79 47
www.bekaert.com/building
Dramix®
Dramix® Steel Fibers 1 BEKAERTbetter together
GE MAINTENANCE HANGAR & APRONS
Aircraft HangarFloor and Apron
Location: Victorville, CA
Contractor: The Haskell CompanyConcrete Supplier: Robertson's Ready Mix
Year: 2003
This facility will be used by GE to maintain aircraft engines on any size plane up to a Boeing 747. The HaskellCompany is a design/build contractor and chose Dramix® RC-65/60-BN Steel Fibers for toughness and durabilityfor the project's hanger floors and exterior apron pavements. In addition, Haskell wanted to reduce the scheduleof slab construction by eliminating the time and labor of placing conventional rebar mats. The project plan was"fast-tracked" so all slab placements would be completed in a condensed time frame - approximately 6 months.
The project included an 82,000 ft2 hangar floor that was7-inches thick and sloped toward two large trench drainsrunning east to west. The slab between the trench drainswas 11-inches thick. The 200,000 ft2 exterior apronpavement is 11-inches thick. All slabs on this projectused 33 Ib/yd3 of Dramix® RC-65/60-BN steel fibers. Anepoxy floor coating was later applied to the hanger floorupon completion. The exterior pavement was broomfinished.
The concrete mix was 5,000 psi compressive and 700psi flexural strength per The Haskell Company'srequirement. The concrete was supplied by ready mixand the Dramix® fibers were added at the jobsite. Allinterior slabs were water cured for seven days toeliminate having to remove membrane curingcompounds before subsequent applications of epoxycoatings in the hangar and floor coverings in the officeareas.
Challenge:
Engine maintenance is performed at the facility for a numberof carriers.
North America:Bekaert Corporation1395 S Marietta PkwyMarietta, Georgia 30067Tel. (800) 372-6940Fax (770) 426-8107
Other countries:N.V. Bekaert S.A.Bekaertstraat 2 - 8550Zwevegem, BelgiumTel. (0) 56/76 69 86Fax.(O) 56/76 79 47
www bekaert.comVbuilding
Dramix
To strengthen slabs andimprove project scheduling
Solution:Dramix® RC-65/60-BN
Floor Thickness:
Concrete Strength:Fiber Dose:
7 & 11-inch floor11-inch paving5,OOO psi33 Ib/yd3
The hangar is large enough for a Boeing 747
Dramix® is a registered trademark of the N.V. Bekaert S A. Zwevegem, Belgium. Modifications reserved All details describe our products in general form only.May 2007, Editor: Jeff Rodencal, Marietta 2006; All Bekaert company names are trademarks owned by NV Bekaert SA Zwevegem - Belgium
Dramix® Steel Fibers 1 BEKAERTbetter together
IKEA
SUPERSTORE AND FURNITUREWAREHOUSE
Location: Burlington, Ontario
Engineer: Brenik Engineering LtdFlooring Contractor: Duron Ontario Ltd
Concrete Supplier: Dufferin ConcreteYear: 1999
MERCIAL WAREHOUSE
Ikea Furniture Warehouse needed additional space for their Burlington location for warehouse storage, maintenance spaceand offices. Extensions were built on the east and west sides of the existing building increasing the square footage by38,000 feet.
Super plasticizer was used to increase slump to 150 mm and 25 kg/m3 of Dramix® Steel Fibers was added to the concretemix. Traprock, a non metallic surface hardener, was used as a finishing surface,complete this additional warehouse space.
Preparationof thesubgrade
A total of 160 m of concrete was used to
Adding Dramix steel fibers to theconcrete mix
Dramix'*'steel fiberconcrete
matrix
North America:Bekaert Corporation1395 S Marietta PkwyMarietta, Georgia 30067Tel. (800) 372-6940Fax (770) 426-8107
Other countries:N V. Bekaert S.A.Bekaertstraat 2 - 8550Zwevegem, BelgiumTel. (0) 56/76 69 86Fax. (0)56/76 79 47
www.bekaert.com/[email protected]
Dramix®
Handfinishing
Challenge: Solution:Design to accommodate rackloads and fork truck loads
Dramix RC so/so BN
Project Size:Floor Thickness:Design Loading:
Concrete Strength:Fiber Dose:
38,000 Ft2175 mm slab350O Ib forklift axle and4500 Ib post loads35MPa25 kg/m3
Dramix® is a registered trademark of the N.V. Bekaert S.A. Zwevegem, Belgium. Modifications reserved. All details describe our products in general form only.February 2007, Editor: Jeff Rodencal, Marietta 2006; All Bekaert company names are trademarks owned by NV Bekaert SA Zwevegem - Belgium
![Strengthening of Concrete Metallic Chipsijetch.org/papers/659-EA1015.pdfcorrugated fiber Eurosteel drawn steel with high mechanical strength [10] and Dramix marketed by Bekaert [11].](https://static.fdocuments.in/doc/165x107/5f7ee9b1fc4492603729ef03/strengthening-of-concrete-metallic-corrugated-fiber-eurosteel-drawn-steel-with-high.jpg)
