Micro-Rebar Technology Superior Concrete. Chuck Wilson Helix Steel Distribution Manager North America

Transcription

1 Micro-Rebar Technology Superior Concrete Chuck Wilson Helix Steel Distribution Manager North America

2 Helix is Only Steel Fiber Approved as Primary Steel in Structural Concrete ISO/IEC Guide 65 Evaluation Report UER279 Issued and in use. Assurance of Structural Capacity UL Assurance of Fire Resistance Public Reviewed Design Method ISO/IEC (IAS) Laboratory Recognized in 99 countries Micro-Rebar

3 Product Description Steel wire tensile strength: 270 ksi (1800 MPa) Electroplated zinc coating: 3 g/m 3 Length: 1.0 inch (25 mm), Equivalent diameter: inch (0.5 mm) Rectangular Cross Sectional Shape Each Helix Micro-Rebar has a minimum of one 360-degree twist. 11,000 parts per pound Micro-Rebar

4 Helix Developed for the Military for Blast Resistant Concrete 1990 ies 10 lbs. of C4 explosive at 10 inches from the 6 inch thick test panel - Rebar Only With 50 lbs/cy of Helix & 50% Less Rebar - Only Helix Can do This!

5 12 Years and 30 Countries: Slabs Walls Footings - Complex Structures audi lo go Micro-Rebar

6 Helix Reinforces Concrete Before the First Crack First Crack in Concrete with Rebar, Plastic or Metal Fibers Helix Reinforces Concrete Before it Cracks. First Crack Point with Helix Concrete Plastic Fibers Do Nothing Micro-Rebar

7 ICF Construction Example Project: ICF Wall rebar both horizontal and vertical rebar. Helix Design: rebar both horizontal and vertical replaced by Helix. Lintel horizontal remains, and one vert on each side of windows and doors. Dowel between cold joints. Micro-Rebar

8 Uniontown Hilton PA Hilton Garden Inn Recently completed hotel. Helix used to replace the majority of the field rebar in the ICF walls. Vertical bar remained around window/door openings and in lintel.

9 High rise 20 story Project 10 walls 10pcy Helix plus one layer of ocew replaced 2 layers of 15M 24 ocew

10 Seattle Pier 57 Piles Project: Seattle Pier 57 Pile Foundation, March 2012 Helix Design: 53 steel piles received 24,000 pounds of Helix micro rebar to replace all #6 rebar cages saving money, reducing schedule and increasing strength. Micro-Rebar

11 Corrosion: Seattle Pier 57 Piles Salt Water Exposure Project: Seattle Pier 57 Grade Beam 18 lbs/cy. Picture shows 3.5 years of salt water spray exposure. No rust or cracks. Micro-Rebar

12 WhiteCore SCI Panel Technology Thin skinned concrete tilt panels were the second step in development.

13 WhiteCore SCI Panel Technology 800 foot x 200 foot x 24 to 38 foot tall Liteform/Helix Tilt Hog Barn R24 Walls. 100 foot spanning roof trusses. Panels weigh about 22 K pounds. Set the whole building with a 35 ton all terrain crane. Crane cost is normally 50% of the construction installation cost for a tilt project.

14 WhiteCore SCI Panel Technology Technology development has evolved into construction of large tilt up buildings. Rebar bundles in the vertical beam column without shear ties and 20 lbs/cy of Helix in the panel, both sides.

15 WhiteCore SCI Panel Technology Horizontal End Picks and Carrying them in a horizontal position around the job site Not the normal way to move tilt panels Only with WhiteCore SCI Panel Technology. 50 foot panels for an outdoor theater movie screen public park. Panels were stack cast and lifted horizontally with four end pick points and two in the center half way down. Unsupported cantilevered section NO CRACKS

16 Sunnybrook Church Parking Lot Sioux City NE Client had such good experience with the 1st - 110,000 feet of parking lot replacement that they are now replacing other areas that have failed. Now using Helix in concrete for all of their paving projects. 9 lbs per yard is their dosage rate on the entire project and patches. No frost heave issues over poor base materials

17 Helix 5-25 Shotcrete Optimized for current Civil Tunnel Specifications Provides Superior performance at low deflections in RDP and ASTM C1609. Plastic fibers do not perform until deflections are high Micro-Rebar

18 Placing and Finish Placing Per Standard Practice ACI 305R ACI R and ACI 207 (Mass Concrete) Finishing per Standard Practice ACI 302.1R Note ACI 544-3R recommendations Adequate Paste Development Helix 3-Part CSI Specification Micro-Rebar

19 Twisted Micro-Rebar Technology Is the Only Micro Rebar Approved as Structural Reinforcement in Structural Concrete.