What is Newchem ACC-C65?
Newchem ACC-C65 is an amorphous calcium aluminate (ACA) based clinker which can be used as additive for Portland cements to accelerate the early and final set of concrete and mortars. Newchem ACC-C 65. Newchem ACC-C65 was originally developed in Japan to be applied in HPC / UHPC concrete. The initial requirement was to achieve 30 MPa within 3 hours. Unlike conventional calcium aluminate (CAC) cements with a crystalline structure, Newchem ACC-C65 provides also excellent durability in outdoor applications, as the main binder remains Portland cement due to the low dosage level.
How does Newchem ACC-C65 work?
Unlike conventional calcium aluminate (CAC) cements with a crystalline structure, Newchem ACC-C65 is based on an amorphous clinker. For perfect performance perfromance Newchem ACC-C65 should be applied in combination with Portland cement, which provides the source of calcium hydroxide (portlandite) or calcium hydroxide should be added. The workability time can be controlled by the amount of set retarder. For this purpose we recommend Denka D 200 as set retarder, which ensures the highest strength values and a narrow transition time between the pasty consistency and cured concrete. The amount of Newchem ACC-C65 must be taken into account as additional binder beside OPC when calculating the water-cement (binder) ratio.
Advantages of Newchem ACC-C65:
- Very fast hardening process even at low ambient temperatures
- Concretes containing Newchem ACC-C65 can be used for exterior applications without restrictions
- Very high early strength
- Very high final strength
- Can be used even with very low w/c ratio
- Reduces autogenous shrinkage
- The guaranteed shelf life of Newchem ACC-C65 in its original packaging is 1 year, which is significantly longer compared to CAC-based cements
Dosage:
The minimum dosage depends on the water/cement ratio, the higher the water/cement ratio, the greater the required amount of Newchem ACC-C65. The recommended minimum amount is 5% related to Portland cement (at w/c = 0.40).
The most common areas of application of Newchem ACC-C65:
- Repair mortars
- Self-leveling mortars
- Screeds
- Waterproof mortars
- Underlayment and anchoring mortars
Quality:
The quality of Newchem ACC-C65 is confirmed by a quality certificate. The shelf life is 12 months, but our test results confirmed that it can be stored in it's original packaging for up to 24 months without significant loss of quality.
Packaging:
In 25 kg bags on 1,000 kg pallets, or in 1,000 kg Big Bags.
You can find the technical data sheets of the products
here.
