DP 60 – Cement Replacement

DP 60 is a high efficiency pozzolanic material, obtained by selection and processing of power station fly ashes resulting from the combustion of pulverised bituminous coal. DP 60 is subjected to strict quality control.

General Information

PresentationFinely divided dry powder
ColourLight grey
Bulk WeightAprox. 1.0 metric ton per cubic meter
Specific densityAprox. 2.3 metric ton per cubic meter
Particle sizeMaximum 18 % ROS on 45 micron sieve
Particle shapeSpherical
Package30 kg paper bags, 1 metric ton big-bags and bulk tankers

Recommended uses

  1. Concrete: General purpose plain and reinforced structural concrete with 28 day strength levels up to 50 MPa. Special purpose concrete, such as mass concrete, pre-cast concrete, pumpable concrete, self-compacting and self-levelling concrete.
  2. Cement: Blended cements (Portland Pozzolana Cement), such as sulphate resistant/marine resistant cement.
  3. Mortar: General purpose mortar for plastering and brickwork. Specialised mortars for floor / wall tiling work. Flowable mortars for use as structural fill in earthworks.
  4. Grout: General purpose grouts for use in earthworks for the treatment of rock cracks. Grouts for earthworks to be used in anchors.

Recommended dosages

The dosages of DP 60 and the other mix constituents should be determined by appropriate mix design testing. They will depend on required mix properties, grade of cement, admixtures used, etc. The following figures are indicative.

Typical replacement levels with DP 60

Percentage of total binderDosage
Low grade concrete (up to 35 Mpa)23% – 35%80 – 150 kg/m3
Medium grade concrete (35-50 Mpa)25% – 35%100–175 kg/m3
Pre-cast concrete20% – 35%70 –140 kg/m3
Mass concrete50%100 – 150 kg/m3
Pumpable concrete30% – 35%100–175 kg/m3
Self compacting/levelling concrete40%150 – 200 kg/m3

Typical concrete performance with 25% DP 60

Water DemandReduced by 8%
Setting TimeIncreased 30 – 60 min
Long Term StrengthIncreased 15% -20%
28 day StrengthSimilar
Early Strength (7 days)Reduces by 10-15%
Required Curing8 to 10 Days
PermeabilityReduced 2 – 5 times
Sulphate AttackSubstantially Reduced
Chlorine PenetrationSubstantially Reduced
Heat of HydrationSubstantially Reduced
Plastic ShrinkageReduced