CASTECHPC-4600

About

CASTECH PC-4600 has been primarily developed for applications in the ready mixed and precast concrete industries where the highest durability and performance is required. The super plasticizing action of CASTECH PC-4600 is different from conventional superplasticizers based on sulfonated melamine and naphthalene formaldehyde condensate, which create electrostatic repulsion of particles. CASTECH PC-4600 initially creates the same electrostatic repulsion and further stabilizes the mix due to the steric repulsion of long lateral chains linked to the polymer backbone.

Typical uses

The excellent dispersion properties of CASTECH PC-4600 make it the ideal admixture for precast and ready mixed concrete where low water cement ratios are required. This property allows the production of very high early and high ultimate strength concrete with minimal voids and therefore optimum density. Due to the strength development characteristics, the elimination or reduction of steam curing in precast works can be considered as an economical option.

Compatibility

CASTECH PC-4600 is compatible with all Portland cements that meet recognized international standards. CASTECH PC-4600 must not be used in conjunction with any other admixture unless prior approval is received from CASTECH Technical Department. CASTECH PC-4600 is suitable for mixes containing: Micro silica, Pulverized fuel ash, Ground granulated blast furnace slag cement.

Benefits

CASTECH PC-4600 offers the following benefits for

The ready-mix producer

• Capability of delivering high performance concrete at any time to the job site in place.
• Production of a concrete with low water cement ratios without loss of workability
• Single product for many application needs

The contractor / applicator

• Easier placing and faster strength development
• Improved concrete surfaces

The engineer

• Assurance that concrete meets original specification
• High quality durable concrete

Advantages

During mixing and placement

• High workability without segregation or bleeding
• Can be placed and compacted in congested reinforcement
• Reduced labor requirement
• Improved surface finish
• Chloride free

Effect on hardened concrete properties

• Increased early and ultimate compressive strengths
• Increased flexural strength
• Higher E modulus
• Improved adhesion to reinforcing and stressing steel
• Better resistance to carbonation
• Lower permeability
• Better resistance to aggressive atmospheric conditions
• Reduced shrinkage and creep
• Increased durability

Dosage

The normal dosage for CASTECH PC-4600 is between 0.5% and 2.0% per 100 kg of cement (cementitious material). Dosages outside this range are permissible subject to trial mixes.

Application

CASTECH PC-4600 is a ready to use admixture that is added to the concrete at the time of batching. The maximum effect is achieved when CASTECH PC-4600 is added after the addition of 70% to 80% of the water. CASTECH PC-4600 must not be added to the dry materials. Thorough mixing is essential and a minimum mixing cycle, after the addition of CASTECH PC-4600, of 90 seconds for forced action mixers is recommended.

Curing

As with all structural concrete, normal curing methods apply.

Packaging

CASTECH PC-4600 is available in IBC, 210-liter drums and in bulk tanks upon request.

Storage & shelf life

CASTECH PC-4600 should be protected from extreme temperature. Should the material become frozen, it must be completely thawed and thoroughly mixed before use. CASTECH PC-4600 has a minimum shelf life of 6 months provided temperature is kept within range 5°C to 30°C.

Health & safety

Health & Safety

CASTECH PC-4600 is non-toxic. Any splashes to the skin should be washed immediately with water. Splashes to the eyes should be washed immediately with water and medical advice should be sought.