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ConBlock CDA: Liquid Amorphous Crystal Waterproofing Admixture

ConBlock CDA is designed to densify and waterproof concrete structures, such as: bridge and highway structures, tunnels and trenches, building foundations, garage and parking structures, below-grade precast structures, wastewater treatment plants, sewer pipes, manholes and water containment tanks (non-potable water).

NSF/ANSI/CAN 61 certified for use in drinking water structures.

PRODUCT DESCRIPTION

ConBlock CDA is a liquid Permeability Reducing Agent (PRA) that densifies concrete. The molecules are fast-reacting, allowing performance to be realized immediately. Due to the tightening of the void space, concrete bleeding is reduced, allowing finishing operations to occur more quickly. After 21 days at 200 psi (CRD-C48) water did not pass through the concrete. ConBlock CDA’s densification properties allow it to be suitable for use in Hydrostatic (PRAH) and non-hydrostatic (PRAN) installations.

FEATURES AND BENEFITS

  • Easy to use liquid admixture
  • Densifies concrete and ehances durability
  • Accelerates cement hydration leading to strength development increase
  • Concrete waterproofing resistant to hydrostatic pressures up to 200 psi
  • Reduces pore-water/bleed-water in placed concrete
  • Meets ASTM C494, Type S requirement / AASHTO M194

DO NOT SUBJECT CONBLOCK CDA TO FREEZING TEMPERATURES BEFORE USE.

PHYSICAL PROPERTIES

DESCRIPTION ConBlock CDA
COLOR: Milky White
ODOR None
DENSITY 9.33 – 9.50 lbs./gal
pH 6.5 – 7.5
SOLIDS (%) 21.0 – 24.0
VISCOSITY <50 Centipoise (CPS)

TESTING

STANDARD TEST METHOD CONBLOCK CDA RESULTS VS. REFERENCE
CRD-C48 Permeability of Concrete Coefficient of permeability rating (K)=1.2x 1013 (96% reduction, 21 days
ASTM C39 Compressive Strength of Concrete >10% increase after 3 days; >10% increase after 28 days
ASTM C666 Freeze-Thaw Durability Passed 300 cycles
ASTM C1585 Measurement of Rate of Absorption of Water by Hydraulic Cement Concretes 36% reduction after 90 days
ASTM C157 Length Change of Hardened Hydraulic-Cement Mortar and Concrete Dry shrinkage of 0.033% (330 microstrain) after 56 days; 23% less than reference
ASTM C1567 Determining the Potential Alkali-Silica Reactivity of Cementitious Materials and Aggregate 21% reduction after 28 days
ASTM C1260 Determining the Potential Alkali-Silica Reactivity of Aggregates 20% reduction after 28 days
ASTM C1760 Bulk Electrical Conductivity of Hardened Concrete 13% reduction at 1000 Hz
BS EN 12390-8 Depth of Water Penetration under Pressure 32% reduction after 90 days