Fiber Reinforced Concrete for Segmental Linings

Traditional Excavation for Segmental Linings
Fiber reinforced shotcrete is used for primary segmental linings within traditionally excavated tunnels. It is applied without formwork, and typically without traditional mesh reinforcement.

When appropriate, cast inset final segmental linings also use Wirand® steel fibers. The fiber reinforced concrete is poured or pumped directly into the formwork.

Adding Wirand® steel fibers into the shotcrete can reduce or even eliminate the traditional steel reinforcement used to consolidate the tunnel excavation.

Whether a dry or wet shotcrete method is adopted, steel fiber reinforced concrete has advantages over traditional steel reinforced solutions:

  • Increase in toughness and ductility
  • Reduction of shrinkage cracking
  • Greater safety - operatives do not need to install steel reinforcement which takes time and increases the risk of the tunnel crown collapsing
  • Reduction in lining thickness
  • Reduction of waste
  • Faster installation time

TBM Excavation for Segmental Linings
When a TBM excavation method is used for Segmental Linings, a final lining of pre-cast concrete segments is installed. On countless projects around the world, these segments have been reinforced with Wirand® steel fibers for structural reinforcement and FibroMac™ synthetic fibers for increased fire resistance and control of plastic shrinkage. Unlike polymer macro-synthetic fibers, Wirand® steel fibers structurally reinforce the concrete, and in some instances can entirely replace the traditional steel reinforcement, providing cost and time savings.

For additional customer support, please call 1-800-638-7744 or email your requests to fibers@maccaferri-usa.com

Product family

Fiber Dosing System

FibroMac™ Synthetic Fibers

Wirand® Steel Fibers


Download Maccaferri featured in World Tunneling

Download USA136 PSC Metals IF TN

Download USA141 Blue Plains Tunnel_IF_DC


Download Tunneling Brochure

Download MacGuide

Case History

Download USA092 - Wirand FF1 - Slab - Denver, CO

Download USA137 Aircraft Engine Manufacturing Plant_IF_VA

Download USA124 - Glass Plant Slab on Grade - CA

Download USA125 - Rumpke Recycling Center - Cincinnati, OH

Download USA135 - Industrial Flooring - Jemison Demsey

Download USA147 - Hibbits Dist Cnt AL

Download USA145 - Nissin Brake Facility GA

Download USA146 - Maccaferri Foundation CA

Download USA105 - Wirand FF1 Slab - Martinsville, VA

Download USA106 - Wirand FF1 Slab - Louisville, KY

Download USA068 - Brightwater Tunnel - WA

Download USA069 - PR53 Tunnel - Maunabo, PR

Download USA076 - Pre-Cast - Deluxe Building Systems

Download USA111 - Wind Turbine Foundations - Wirand

Download USA067 - San Francisco Bay Utility Tunnel - CA

Download USA060 - Tingley Coliseum Concrete FLoor - Albuquerque, NM

Download USA059 - North Light Marina Storage Floor - Nicebille, FL

Download USA109 - Bear Creek Winery - Concrete Slab

Download USA110 - Underwater Slab - CA

Download USA061 - Wirand FS7 - Interstate 10 - TX

Product Guide

Download Maccaferri Product Guide

Product Technical Data Sheets

Download FibroMac™ 12- Multi-Filamentary Polypropylene Fiber"

Download Wirand® Fiber FF1"

Download Wirand® Fiber FF2HS"

Download Wirand® Fiber FF3"

Download Wirand® Fiber FS3N"

Download Wirand® Fiber FS7"

Technical Notes

Download Fibers Technical Manual"

Back to the main Solution page