The following tests have been performed on DensiCrete prior to it being deemed acceptable
by the Department of Transportation of Pennsylvania (PENNDOT).
ASTM-C42 COMPRESSIVE AND FLEXURE TEST
Low Strength Cubes
Compressive testing was performed on cores taken from St.
Paul's Church in Key West, Florida. The untreated cube broke at 650 PSI.
Normal Strength Cubes
In compressive strength testing, the untreated cube broke at 3680 PSI, whereas, the DensiCrete treated cube broke at 4740 PSI, a 29% increase in compressive strength.
In flexure strength testing, the untreated cube broke at 423 PSI while the DensiCrete treated cube broke at 543 PSI, an increase of 28% in flexure strength.
High Strength Cubes
In compressive strength testing, the untreated cubes broke at 6120 PSI, whereas, the DensiCrete treated cube broke at 8060 PSI, a 32% increase in compressive strength.
ASTM-C666 FREEZE / THAW TEST
PTL Freeze / Thaw Test for DensiCrete Treated Concrete:
PTL Carbonation Test for DensiCrete Treated Concrete:
Pittsburgh Testing Laboratories performed two penetration
tests. In one test, DensiCrete
penetrated completely through to the bottom of a 6-inch concrete cylinder.
On April 28, 1995, a sample of DensiCrete was supplied to the Pennsylvania Department of Transportation (PENNDOT) for testing to confirm the Pittsburgh Testing Laboratory results. PENNDOT evaluated DensiCrete in their laboratories located in Harrisburg, PA.
Subsequently, on April 23, 1996, The Pennsylvania Department of Transportation (PENNDOT) approved DensiCrete in Bulletin No. 15 as an Approved Construction Material, under "Penetrating Sealers".
CHLORIDE ION PENETRATION TEST
The Pennsylvania Turnpike Commission engaged Solar Testing
Laboratories to perform the AASHTO T-259 test on DensiCrete treated concrete cylinders.
Because application procedures were not forwarded to the test
lab, all concrete samples received five skim coats of DensiCrete at a spread rate of approximately 500-sq. ft. per gallon.
Concrete samples were divided into two categories: those representing
normal concrete surfaces (A and B) and those representing spalled concrete surfaces (C and D). Normal surfaces
would reflect those road and bridge surfaces most likely encountered in the field.
Normal Concrete Surface Results
Uncut concrete samples A and B were treated with DensiCrete and subjected to the
chloride ion solution for a period of 90 days.
A measurement of 52/1000% absorbed chloride ion equates to
approximately 2 lbs. of chlorides per cubic yard of concrete.
Because the average absorbed chloride ion percentage in DensiCrete treated samples A and B was less than 52/1000%, DensiCrete protected these concrete samples from chloride ion reactivity.
The control group measured 28.85 lbs. of chlorides per cubic
Spalled Concrete Surface Results
Samples C and D were cut longitudinally exposing the aggregate
and were subjected to the chloride ion solution for a period of 90 days.
As a result of this test, completed on October 17, 1997, DensiCrete has been approved for use on the Pennsylvania Turnpike.
SKID RESISTANCE TEST
On October 10, 1997, the Ohio Department of Transportation performed a skid resistance test (SHE-75-14.97) on an untreated portion of concrete surface on a bridge designated SR 119 Exit 99 over 1-75. On October 31, 1997, the Ohio Department of Transportation performed the same test on a DensiCrete treated portion of concrete surface of the same bridge.
On November 3, 1997, the Ohio Department of Transportation reported that the DensiCrete treated concrete bridge surface had passed the skid resistance test.
CHLORIDE ION EVACUATION TEST
Solar Testing Laboratories, Inc., performed the Chloride Ion
Evacuation test in conformity with AASHTO T-260 standards.
The treatment was simple, in which a concrete slab was treated
with the single treatment consisting of 1.5 applications of DensiCrete. Over the next few weeks, the slab was brushed and rinsed to remove the chlorides that
were expelled from it.
The first key point is that the application of DensiCrete achieved a greater removal
of chlorides from the concrete than that which can be achieved using the much more expensive and time consuming
cathodic ponding technique.
The second key point is that the treatment of the concrete
matrix with DensiCrete will
not only remove existing chlorides from the matrix, but will also prevent future penetration of additional chlorides.
COPIES OF ALL OF THE ACTUAL TEST RESULTS, FROM THE INDEPENDENT LABORATORIES, ARE LOCATED IN THE TECHNICAL MANUAL ON THIS SITE, AND CAN BE DOWNLOADED AND/OR PRINTED
WICKTEK INC. 1998 through 2010
DensiCrete MUST be applied as per the manufacturer's parameters and procedures.