2017
Hampton, VA

THE PROBLEM

Tipping slabs are constantly being replaced due to their relatively short and incredibly challenging service lives. This part of waste and recycling facilities is where large trucks bring construction debris - including broken up concrete, asphalt, tree stumps, and branches (non-residential trash), presenting a unique set of challenges. Reducing shrinkage cracking, long term structural cracking, maintaining high strength levels and minimizing joints for equipment to catch on are all high priority design requirements.

Cocnrete Slab
Construction Equipment Breaking Concrete Slab

SIKA SOLUTION

The typical slab design called for 10.5”+ thick concrete, traditionally reinforced with two layers of #5 rebar placed at 12” on center and more than 50 lbs/cyd of a steel concrete fiber to control cracking. After reviewing, the local concrete producer Branscome, Inc. and Sika representatives helped to create a value-engineered solution featuring 80 lbs/cyd of the SikaFiber® Force CS-1000 fiber and eliminating the need for traditional steel reinforcement.

The fiber, in conjunction with a 7000 psi, low-shrinkage mix design, allowed for a joint free design over the 65’ x 100’ area. Over time, this will reduce the wear and tear on equipment and personnel while helping to increase life span.

PRODUCTS USED

CONCRETE SPECIFICATION
  Requirement
Slump 3"-5"
Air Content ±5%
Strength 7000 psi
Placement Tailgate/Pump
Yardage 220
CONCRETE MIX DESIGN, LBS/CYD:
Total Cementitious 773 lbs/cyd
W/Cm 0.36
Sika® AEA-14 0.2 oz/cwt
Sika® ViscoCrete®-2100 4 oz/cwt
Sika® ViscoFlow®-2020 4 oz/cwt
Sika® Control SC 25 lbs/yd
Sika® Control-75 40 oz/cwt
SikaFiber® Force CS-1000 80 lbs/cyd
DOWNLOAD THE CASE STUDY

Read the full store on the Spivey Disposal Tipping Floor.

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