About Keyway Curb

Keyway Curb Company – Established 1986

Keyway Curb is a unique method for the installation of curb on public right-of-ways and parking lot development.    This curb system is based on sound engineering principles that provide the contractor as well as the client many benefits over standard curb and gutter installations.

  • Savings of 60% or more are typical in the retrofitting of existing roadways and savings of 40% are commonplace on private developments.  The many steps required to install curb and gutter on an existing roadway are eliminated.   Keyway Curb is installed in a fraction of the time of the curb and gutter.
  • Schedule flexibility is maximized as the contractor may pave (seal) his job early for site protection from inclement weather and the curb is installed according to his or her schedule.
  • Reduced maintenance is normal as the Keyway Curb method eliminates all vertical water seams.   In a past study, the DRCOG determined that the vertical water seam created at the lip of the pan of C&G and the asphalt pavement is largely at fault for the majority of asphalt pavements deterioration.  This study failed to account for the through and through seams created by the transverse control joints that further contribute to the wetting and weakening of the base materials.
  • Curb installation rates of 3,000lf per day are commonplace on Public Right-of-Ways and enhances the safety of the motoring public by minimizing dangerous bottlenecks created by traffic.
  • Product durability has been demonstrated time and again and is now recognized by most engineers.  We have installed ‘keyed’ curbing in regions of Colorado that receive above normal snowfall, and subsequent removal, without displacement.  In fact, an open shoulder Type 6 erosion curb installation of 9,300+lf on Hwy. 287 north of Ft. Collins has had ZERO loss in 6 years.  On a project installed on the Palmer Divide (Northern El Paso County) having 2100 feet in 1987, just 3 feet has been displaced when investigated in 2010.
  • Eco friendly.  Keyway Curb is a significant GREEN product as its utilization, in lieu of curb and gutter on public right-of-way retrofits, reduces in kind carbon emissions by over 400%.  Many studies point out that the manufacture and use of concrete may be responsible for 5-10% of global carbon emissions.

Keyway Curb is formed by customized equipment that compresses a high strength, fiber reinforced concrete mix through a mold having the engineers desired shape.  The low slump concrete is slip formed over a 1 inch deep by 5 inch wide “KEYWAY” and creates a continuous anchoring of the curb throughout its entirety.  Control joints are placed every 5-6′ at a minimum depth of 25% of the thickness of the concrete.  We apply a white wax cure for its indicator properties as well as its UV resistance during its curing period.   Twenty-eight day cylinder breaks are typically 5200-=5600 psi.