HPS 850 Steel/Micro Blend
DE Fiberworks, Inc. - Concrete Fiber Reinforcement
563.340.7065

850 BLEND

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850 Blend is a blend of low carbon, drawn wire fibers and polypropylene synthetic micro fibers. The combination of the two proven fiber types provides a reinforcement system that addresses plastic shrinkage as well as restrained shrinkage in concrete slabs. Blending both fiber types into one, pre-measured water soluble bag offers and engineered, cost efficient way to provide a highly effective alternate to welded wire fabric and rebar. FRC 850 Blend fibers are uniformly distributed throughout the concrete to assure the owner, contractor, and engineer of excellent crack control. Complies with ASTM C 1116, Type III Synthetic Fiber-Reinforced Concrete or Shotcrete and ASTM A 820, Type V steel fiber, modified cold-drawn wire.
850 Blends850 Blends
Description

 

850 BLEND

STEEL & MICRO-SYNTHETIC

 

Guidelines

 

850 Blend fibers are intended for crack containment reinforcement as outlined in ACI 360-10 3.2.2 and should not be used to replace primary reinforcement (structural or load bearing) as outlined in ACI 318. 850 Blend should not be used to decrease the thickness of the concrete or increase the control joint spacing beyond the recommen- dations of ACI or PCA standard guidelines. We recommend following ACI guidelines for control joint locations and details. The standard dosage rate for 850 Blend is one 24 lb. water soluble bag per cubic yard of concrete. Please consult DE Fiberworks for dosage rates for your application, design information, or more details when using 850 Blend fibers.

 

Applications

 

 850 Blend fibers may be used in any concrete application that requires increased crack control, improved impact, shatter and abrasion resistance, and improved durability. 850 Blend fibers are ideal for the following applications:

 

Slabs-on-Ground

Industrial Floors

Warehouse Floors

Composite Metal Deck Slabs

Parking Areas

Concrete Overlays & Toppings

 

Product Description

 

850 Blend is a blend of low carbon, drawn wire fibers and polypropylene synthetic micro fibers. The combination of the two proven fiber types provides a reinforcement system that addresses plastic shrinkage as well as restrained shrinkage in concrete slabs. Blending both fiber types into one, pre-measured water soluble bag offers and engineered, cost efficient way to provide a highly effective alternate to welded wire fabric and rebar. 850 Blend fibers are uniformly distributed throughout the concrete to assure the owner, contractor, and engineer of excellent crack control. Complies with ASTM C 1116, Type III Synthetic Fiber-Reinforced Concrete or Shotcrete and ASTM A 820, Type V steel fiber, modified cold-drawn wire.

 

Technical Information

 

Steel Fibers (low carbon, drawn wire)
Fiber Length 1.5 inch
Tensile Strength 140
ksi Average thickness 0.04 inch
Average Aspect Ratio <50
Specific Gravity 7.85
Modulus of Elasticity 29.0 x 108 @ 70oF
Melt Point 2,760oF
Absorption Nil
Micro Synthetic Fibers (virgin polypropylene)
Fiber Length Multi-length, ½” and ¾”
Tensile Strength 40 – 60 ksi
Specific Gravity 0.91
Modulus of Elasticity 500 ksi Melt Point 324oF Denier 10 – 15
Absorption Nil

 

Advantages:

 

Excellent Crack Control

Provides Impact, shatter and abrasion resistance

Safe & Easier than WWF or rebar

Saves Time and Hassle

Cost Effective

Uniform Reinforcement

Requires no minimum cover

Always Positioned Correctly

Pumpable Reinforcement

 

850 BLEND

 

STEEL & MICRO-SYNTHETIC

 

Mixing, Placing & Finishing

 

Mixing   850 Blend fibers are packaged in pre-measured water soluble bags designed to be introduced into the concrete mix after batching other concrete materials. Care should be taken to make sure the fibers are not added to the tail end of a high slump mix. Mixing should conform to ASTM C 94 with a minimum of 75 revolutions of the drum at full mixing speed to ensure uniform distribution of the fibers.

Placing –  850 Blend fibers can be pumped and placed using conventional equipment. Hand screeds can be used, but vibratory and laser screeds are recommended to minimize any surface fibers. At higher dosage rate of fibers, the use of a mid-range or high-range water reducer should be considered.

Finishing - Standard finishing equipment and techniques can be used when working with  850 Blend fibers. Finishing operations should begin as outlined in ACI 302. Troweling blades should be kept flat for as long as possible to ensure a fiber free surface.

 

 

Reinforcement Objective

 

To inhibit plastic and settlement shrinkage cracking prior to the initial set, and to reduce hardened concrete shrinkage cracking, improve impact and abrasion resistance, and enhance concrete durability. Provide increased level of residual strength and flexural toughness. Alternate to WWF and rebar for shrinkage
& temperature reinforcement.

 

 

References

 

ASTM C 94 Standard Specification for Ready-Mixed Concrete Uniformity Requirements

ASTM C 1399 Average Residual Strength of Fiber Reinforced Concrete

ASTM C 1436 Standard Specification for Materials for Shotcrete

ASTM C 1609 Standard Test Method for Flexural Performance of Fiber Reinforced Concrete

ASTM C 1116 Standard Specification for Fiber-Reinforced Concrete and Shotcrete

ASTM A 820 Standard Specification for Steel Fibers for Fiber- Reinforced Concrete

ACI 302 Guide for Concrete Floor And Slab Construction

ACI 360R-10 Guide to Design of Slabs-on-Ground

ACI 506 Guide for Shotcrete

 


Dave Edmundson, P.E.

 

dave@defiberworks.com

 

563-340-7065

 

Warranty and Limitation of Liability

This publication should not be construed as engineering advice. While the information is accurate to the best of our knowledge, DE Fiberworks does not warranty its accuracy or completeness. Product sold herein is of merchantable quality to seller’s standards and specifications. Seller’s warranty is limited to manufacturer’s product warranty and the recommended application and fitness for a particular purpose. In no event shall

DE Fiberworks be liable for any special, incidental, consequential, or exemplary damages.

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Did You Know?

Fiber reinforcement makes good concrete better?

 

Fiber reinforcement makes good concrete better, in short because fiber reduces cracking and adds long-term durability to a wide variety of concrete applications.  Fiber reinforcement provides an alternative construction method to traditional welded wire fabric and rebar reinforcement and provides additional benefits, including guaranteed 3-dimensional reinforcement, safer installation and more economical.  DE Fiberworks supply a full range of fiber reinforcement products to meet challenging demands and provide the best fiber reinforcement solution for the specific application.   Fiber technology has advanced over the last decade to improve mixing, finishing and performance in fresh and hardened concrete.