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What Are the Differences Between Types A, B, C and D FIBC Fabrics?
December 10, 2014
Bulk bag fabric types are all about controlling static electricity, which is an imbalance of electric charges within or on the surface of a material. When bulk bags are rapidly filled and discharged, the flowing movement of finely powdered substances can cause a buildup of static electricity. Removing or preventing an electrical charge is critical […]
How Should Concrete Mixes with High Dosages of Macrosynthetic Fibers Be Adjusted?
December 10, 2014
In this article we will review an acceptable approach to adjusting mix designs when ABC Polymer’s macrosynthetic fibers, FiberForce 650™ (Tuf-Max DOT™), Performance Plus DOT™ and Macro-Pro™, are used as reinforcement in the concrete at dosage levels from 3.0 to 11.0 pcy. The Basics When we talk about a standard concrete mix design there are four principal […]
Macrosynthetic Fibers Save Owners Money Over Conventional Temperature-Shrinkage Steel Reinforcement
July 21, 2014
When using conventional temperature-shrinkage steel reinforcement the Structural Engineer tends to use a one-size-fits-all approach on projects to offset the potential for the field crew to place the wrong reinforcement system in a cross-section. Too often the Structural Engineer determines what temperature-shrinkage reinforcement is needed for the most demanding concrete application and then specifies that […]
Three-Part Master Specification: Macrosynthetic-Fiber Reinforced Concrete
July 20, 2014
This specification is specific to the use of Macrosynthetic Fibers as secondary/temperature-shrinkage reinforcement and post-first crack reinforcement in concrete. The purpose of this document is to assist design professionals in the preparation of project or office master specifications. It follows guidelines established by the Construction Specifications Institute and, therefore, may be used with minor editing […]
Fiber Reinforced Pervious Concrete Specification
May 14, 2014
This Addendum is to be used in conjunction with ACI 522.1 Specification for Pervious Concrete Pavement ACI 522.2.23 Fibers reads: The use of fibers in pervious concrete is permitted when approved by the Architect/Engineer. Important: ACI 5188.8.131.52 Opening to Traffic reads: Do not open the pavement to vehicular traffic until concrete has cured at least 7 uninterrupted days … ADDENDUM […]
Ultra-Thin Whitetopping (UTW) Lasts Three Times Longer than HMA!
August 27, 2013
Ultra-Thin Whitetopping or UTW is a reversal of normal highway maintenance practice. Instead of Hot Mixed Asphalt (HMA) being placed on top of failed concrete, concrete is placed on failed HMA, more specifically, Fiber Reinforced Concrete (FRC). The Federal Highway Administration has approved UTW and has participated in a number of demonstration projects sponsored by […]
Is Fiber Reinforced Concrete Approved and Specified by Government Agencies and Engineers?
May 28, 2013
The synthetic fiber reinforcement approved for use as temperature-shrinkage reinforcement in concrete is described in ASTM C1116, Section 4.1.3 and Note 2. The chemical base of the synthetic fiber resins that are compatible with a cement concrete are listed. International Code Council (ICC) has adopted a performance-based specification for Fiber Reinforced Concrete (FRC) as either […]
How to Compare the In-Place Cost of Wire Mesh versus Synthetic Fibers
June 19, 2012
We know there is a major technical advantage in using Fiber Reinforced Concrete versus wire mesh. The quantifiable evidence shows that the 3-dimensional fiber reinforcement is proactive whereas the single layer of wire mesh, at best, is reactive. The economic benefits significantly multiply the value of using Fiber Reinforced Concrete. Here is how to compare […]
Will Synthetic Fibers Replace Reinforcing Steel in the Concrete?
April 19, 2012
Nowhere in ACI’s 318 can one find any reference to the substitution of structural steel with microsynthetic or macrosynthetic fibers. Plainly stated when the area of the steel is used in the structural design of the cement concrete-steel composite element then the synthetic fibers cannot replace the steel in question. None of the standard design equations […]
Q: How do we, as ready mix concrete sales people, flip a project specification from conventional temperature-shrinkage reinforcement to Fiber Reinforced Concrete (FRC) or from one FRC system to the system we are selling?
November 17, 2010
A: Most ready mixed concrete sales people are not aware of the process required to secure a change order to the specifications for a given project when desiring to replace the wire mesh with FRC or to offer an alternate to the FRC system specified.. Actually there are two roads that can be followed to […]