Chicago Testing Laboratory (CTL) purchased equipment to perform the Illinois SCB Performance Test, which evaluates asphalt mixtures for cracking potential. The SCB Test examines the load vs. displacement curve to determine a Flexibility Index that indicates a material's resistance to crack propagation. As one of the first labs to adopt this test, CTL aims to help clients maximize pavement performance by evaluating mixtures to avoid premature cracking failure using their experts who helped develop the SCB test method.

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ChicagoTesting Laboratory is excited to be at the forefront of the
Illinois SCB Performance Test. As one of the first laboratories to
purchaseandadoptequipmentfortheSCBPerformancetest,CTL
hasmadeitaprioritytopavethewayforthistestmethod’sindustry
introduction. In this effort, CTL is able to boast the inclusion of
experts on our team who were pivotal in the development of this
testmethod,allowingustoprovidesuperiorservicetoourclients.
The SCB Performance Test
The SCB Test (Semi-Circular Bending Beam) is a test designed
to complement the Hamburg Wheel Test. While the Hamburg
Wheel Test screens mixtures for rutting potential, the SCB
targets the other end of the performance spectrum: cracking.
The load vs. displacement curve is examined and a Flexibility
Index is determined based on a combination of parameters
including the Fracture Energy. This Flexibility Index can be
viewed as a score indicative of a material’s cracking potential.
The higher the score, the more resistance to crack propagation.
ChicagoTestingLaboratory,Inc.
WITHOUT A DOUBT.
You can’t predict the future—but our past performance should
provide more than ample assurance of why we are the people
you can rely on WITHOUT A DOUBT. Since 1912, the name
Chicago Testing Laboratory has been synonymous with the
word trust.
WHERESHOULDYOUTURNTO HELPMAXIMIZEYOURPAVEMENT
PERFORMANCE?
With the implementation of this mix evaluation, your poor per-
formance susceptibility gap will be further reduced. CTL staff
brings to the table extensive research experience relevant to
the development and implementation of this test method. Let
us evaluate your mixtures to help you avoid premature cracking
failure!