Technical Data


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4. TECHNICAL DATA

Applicable Standards

Army Corps of Engineers (USACE)
CRD-C 48-73 - Permeability of Concrete
DIN 1048 - Impermeability to Water
ÖNORM B 3303 - Impermeability to Water
American Society for Testing Materials (ASTM)

  • ASTM C 267 - Chemical Resistance of Mortars, Grouts and Monolithic Surfacings 
  • ASTM C 672 - Standard Test Method for Scaling Resistance to Concrete Surfaces Exposed to De-icing Chemicals 

JIS A 6204 (Japan) - Freeze/Thaw Durability
USA Standard N6.9-1967
Xypex Specification Manual

Approvals

Approved for use in structures containing foodstuffs or potable water by:

  • NSF International - NSF 61 potable water approval
  • US Environmental Protection Agency
  • Agriculture Canada
  • Contact manufacturer for additional international approvals information.

Physical / Chemical Properties

PERMEABILITY
USACE CRD C48-73 Two inch (51 mm) thick, 2000 psi (13.8 MPa), Xypex-treated, concrete samples were pressure tested up to a 405 ft. (124 m) water head (175 psi / 1.2 MPa) which was the limit of the testing apparatus. While untreated samples showed marked leakage, the Xypex-treated samples (as a result of the crystallization process) became totally sealed and exhibited no measurable leakage. 

DIN 1048 Twenty cm thick Xypex-treated concrete samples were pressure tested up to 7 bars (230 ft. / 70 m water head) for 24 hours to determine water impermeability. While the reference specimens measured water penetration up to a depth of 92 mm, Xypex-treated samples measured water penetration of zero to an average of 4 mm. 

ÖNORM B 3303 Xypex-treated concrete samples were pressure tested to a maximum 7 bars (230 ft. / 70 m water head) for 10 days. Test revealed that while 25 ml of water had penetrated the untreated concrete samples, zero ml had penetrated the Xypex-treated samples. Test specimens were then broken and showed water penetration to a depth of 15 mm on untreated samples but no measurable water penetration on the Xypex-treated samples.

CHEMICAL RESISTANCE 
ASTM C 267
Xypex-treated cylinders and untreated cylinders were exposed to hydrochloric acid, caustic soda, toluene, mineral oil, ethylene glycol, pool chlorine, brake fluid and other chemicals. Results indicated that chemical exposure did not have any detrimental effects on the Xypex coating. Tests following chemical exposure measured an average 17% higher compressive strength in the Xypex-treated specimens over the untreated control samples.

FREEZE / THAW DURABILITY 
ASTM C 672
Xypex-treated samples restricted chloride ion concentration to below the level necessary to promote electrolytic corrosion of reinforcing steel. Visual examination of untreated panels after 50 cycles showed a marked increase in surface deterioration as compared to Xypex-treated panels. 

JIS A 6204
The resonating frequency of both untreated and Xypex-treated concrete samples were measured throughout 435 freeze/thaw cycles. At 304 cycles, the Xypex-treated samples showed 96% relative durability compared to 90% in the untreated samples. At 435 cycles, the Xypex-treated samples measured 91% relative durability compared to 78% in the untreated reference samples.

RADIATION RESISTANCE 
USA Standard N6.9-1967
After exposure to 5.76 x 104 rads of gamma radiation, the Xypex treatment revealed no ill effects or damages.



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