The use of steel-fiber reinforcement as an alternative to conventional reinforcement of various concrete structures has been limited in the construction industry. This is because of the fact that, unlike traditional reinforcement, the performance characterization of steel-fiber concrete is not standardized, because the fibers are distributed throughout the concrete section. Whereas direct tensile resistance is the performance measurement required for design, the steel-fiber industry has yet to actively employ direct tensile testing of steel fibers. The tensile response of steel-fiber-reinforced concrete has been investigated. The primary purpose of this paper is to present a robust new direct tension test method. This method is able to determine the uniaxial tensile response of steel-fiber-reinforced concrete. The method uses a three-dimensional “hourglass”-shaped tapered specimen. This paper also focuses on developing a practical method to determine the average tensile force per fiber.The use of steel-fiber reinforcement as an alternative to conventional reinforcement of various concrete structures has been limited in the construction industry. This is because of the fact that, unlike traditional reinforcement, the performance characterization of steel-fiber concrete is not standardized, because the fibers are distributed throughout the concrete section. Whereas direct tensile resistance is the performance measurement required for design, the steel-fiber industry has yet to actively employ direct tensile testing of steel fibers. The tensile response of steel-fiber-reinforced concrete has been investigated. The primary purpose of this paper is to present a robust new direct tension test method. This method is able to determine the uniaxial tensile response of steel-fiber-reinforced concrete. The method uses a three-dimensional “hourglass”-shaped tapered specimen. This paper also focuses on developing a practical method to determine the average tensile force per fiber.

Pensmore Reinforcement Technologies, dba Helix Steel is pleased to announce a strategic partnership with Micro Fibras de Acero CR S.A. Through this partnership, Helix Steel will be supplying Helix® Micro Rebar™ to the Costa Rican construction industry.

Headquartered in San Jose, Costa Rica, Micro Fibras CR S.A. includes business partners Alberto Apestegui, ME, Enrique Blair, M.Sc., Ricardo Jimenez, and Campion Platt. Each partner is involved in different aspects of architecture, construction, design, and engineering. 

Helix Steel is the manufacturer of Twisted Steel Micro-Rebar™ (TSMR™ or Micro-Rebar™) reinforcement, a three dimensional concrete reinforcement technology that quantifiably increases shear strength, durability and ductility while providing industry leading pre-crack capabilities. Simply put, by using Helix® Micro-Rebar™ reinforcement, you are protecting  your investment in concrete. 

Helix Steel is proud to welcome Marsha Moore Harding as Account Manager-Southeast. Luke Pinkerton, President and Chief Technology Officer of Helix Steel said, “We are excited to welcome Marsha. Her knowledge of the construction industry is deep, and her commitment to customer success made her an ideal choice for us.”

Today Helix Steel is proud to announce two new Helix® products designed to meet the needs of the Ultra High-Performance Concrete (UHPC) market.  These Buy America compliant products are based on the company’s patented Twisted Steel Micro RebarTMtechnology.  The twisted, screw-like shape of Helix® has been shown to provide advantages over the smooth steel fibers that are common in the industry. The products are manufactured in Grand Rapids, Michigan under an ISO 9001:2015 certified quality management system.

Helix Steel announced today a new partnership with Construction Innovations Company as its representation in the North East United States.  Complete with its own engineering team, Construction Innovations Company (Coninnco) brings over 45+ years of experience in construction product sales and support to the Helix team.  Helix warmly welcomes the team including Bob Edwards, Mark Murray, and Allison Verley to the team.

Bringing together the latest reinforcement and cement technology, a live demonstration featuring a panel lift also took place during the evening. The panel, designed by Pinnacle Structural Engineers, consisted of traditional steel reinforcement bars limited to 48-in. centers horizontally and vertically while the rest of the panel was reinforced with TSMR. The effort was discussed during the first Early Bird Roundtable of the event moderated by Luke Pinkerton of Helix and Don Grieve of Pinnacle Structural Engineers. The 4.5-in. think panel was lifted by TAS Commercial Concrete to demonstrate the fast set and 3-d reinforcement technology.

Imagine the valuable impact on the tilt-up industry if it were possible to reduce panel thickness by 20%, eliminate 70% or more of traditional rebar, and erect panels the same day they are poured. While any one of these provides incremental benefit, the combination of the three is an innovative and disruptive advancement within the industry that significantly improves project efficiencies, time to completion, and up-front cost advantages.

This may be the most exciting demo because it will include an actual lift and has additional interest due to the use of high-early strength concrete and twisted steel micro rebar,” says TCA Technical Director Jim Baty.