ICC-ES AC470

Full Name

ICC-ES AC470 – Acceptance Criteria for Use of Twisted Steel Micro Reinforcement (TSMR) in Concrete

Scope

ICC-ES AC470 outlines the acceptance criteria for evaluating the use of Twisted Steel Micro Reinforcement (TSMR) in concrete as an alternative to conventional steel reinforcement. TSMR consists of small, twisted steel fibers that are added to the concrete mix to improve its properties. The scope of AC470 includes:
  • Material properties: it specifies the requirements for the TSMR fibers, including their chemical composition, mechanical properties (tensile strength, yield strength), and geometric characteristics (diameter, twist).
  • Performance requirements: it defines the criteria for evaluating the performance of TSMR in concrete, including its contribution to flexural strength, shear strength, and crack control.
  • Testing procedures: it details the standardized testing methods for assessing the properties and performance of TSMR-reinforced concrete, such as tensile tests, flexural tests, and shear tests.
  • Design guidelines: it provides guidance on designing concrete elements reinforced with TSMR, including recommendations for fiber dosage, spacing, and anchorage details.
  • Evaluation and certification: it outlines the process for evaluating and certifying TSMR products and systems to ensure they meet the acceptance criteria and can be safely used in construction.
By adhering to ICC-ES AC470, manufacturers can demonstrate that their TSMR products meet the required performance standards for use in concrete reinforcement. It also provides engineers and builders with a reliable framework for designing and constructing TSMR-reinforced concrete structures.

Resources

Keywords

twisted steel micro reinforcement (tsmr); acceptance criteria; concrete; evaluation; material properties; tensile strength; yield strength; fiber dosage; flexural strength; shear strength; crack control; testing procedures
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