CASTECHHPS-001

About

CASTECH HPS-001 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 HPS-001 is different from conventional superplasticizers based on sulfonated melamine and naphthalene formaldehyde condensate, which create electrostatic repulsion of particles. CASTECH HPS-001 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 HPS-001 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 HPS-001 is compatible with all Portland cements that meet recognized international standards. CASTECH HPS-001 must not be used in conjunction with any other admixture unless prior approval is received from CASTECH Technical Department. CASTECH HPS-001 is suitable for mixes containing: Micro silica, Pulverized fuel ash, Ground granulated blast furnace slag cement.

Benefits

CASTECH HPS-001 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
• Self-compacting concrete; generally, no vibration required
• 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 HPS-001 is between 0.5% and 1.5% per 100 kg of cement (cementitious material). Dosages outside this range are permissible subject to trial mixes.

Application

CASTECH HPS-001 is a ready to use admixture that is added to the concrete at the time of batching. The maximum effect is achieved when CASTECH HPS-001 is added after the addition of 45% to 55% of the water. CASTECH HPS-001 must not be added to the dry materials. Thorough mixing is essential and a minimum mixing cycle, after the addition of CASTECH HPS-001, of 60 seconds for forced action mixers is recommended.

Curing

As with all structural concrete, normal curing methods apply.

Packaging

CASTECH HPS-001 is available in IBC, 210-liter drums and in bulk tanks upon request.

Storage & shelf life

CASTECH HPS-001 should be protected from extreme temperature. Should the material become frozen, it must be completely thawed and thoroughly mixed before use. CASTECH HPS-001 has a minimum shelf life of 12 months provided temperature is kept within range 5°C to 30°C.

Health & safety

Health & Safety

CASTECH HPS-001 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.