CASTECHES-435
Water-Reducing and Accelerating Admixture based on Poly- carboxylate Ether
CASTECH ES-435 is a patented, ready-to-use liquid admixture formulated to accelerate time of setting and to increase early concrete strengths.
Overview
About
CASTECH ES-435 is a patented, ready-to-use liquid admixture formulated to accelerate time of setting and to increase early concrete strengths. CASTECH ES-435 does not contain calcium chloride and is formulated to comply with ASTM C 494/C 494M Type E, accelerating, admixture requirements.
Typical uses
Recommended for use in
- Reinforced, precast, pumped, flowable, lightweight or normal weight concrete and shotcrete (wet mix)
- Concrete placed on galvanized steel floor and roof systems which are left in place
- Prestressed concrete
- Fast-track concrete construction
- Concrete subject to chloride ion constraints
- Self-consolidating concrete (SCC)
- Pervious concrete
- Masonry mortar
Compatibility
CASTECH ES-435 is compatible with all Portland cements that meet recognized international standards. CASTECH ES-435 must not be used in conjunction with any other admixture unless prior approval is received from CASTECH Technical Department. CASTECH ES-435 is suitable for mixes containing: Micro silica, Pulverized fuel ash, Ground granulated blast furnace slag cement.
Benefits
Benefits
- Earlier finishing of slabs — reduced labor costs
- Reduced in-place concrete costs
- Reduced or eliminated heating and protection time in cold weather
- Earlier stripping and reuse of forms
- Superior finishing characteristics for flatwork and cast surfaces
Advantages
Features
- Accelerated setting time across a wide range of temperatures
- Increased early compressive and flexural strengths
Effect of increased early strength
- Earlier stripping and re-use of forms for walls and precast work
- Earlier structural use of concrete, as in lift-slab construction, tilt-up, paving and floors
- Earlier tensioning in post-tensioned concrete based on Poly-
- Earlier de-tensioning in pre-stressed concrete
- Potential energy savings in accelerated steam-cured applications by reducing curing temperatures and/or curing time
- Offsetting the set retardation of stabilised concrete
Technical data
| Consistence | Liquid |
|---|---|
| Colour | Light Brown |
| Chloride According to EN 934-2 | Nil |
| Classification According to | Type E ASTM C494 |
| Specific Gravity | 1.05±0.02 @ 25°C |
| Air Entrainment | Less than 1.5% |
| pH (ISO 4316) | 4.0 – 6.0 |
| Alkali Content (EN 480-12) (%) | < 3 |
Typical values. Refer to the TDS for full details and test conditions.
Application
Dosage
The normal dosage for CASTECH ES-435 is between 0.5% and 2.5% per 100 kg of cement (cementitious material). Dosages outside this range are permissible subject to trial mixes.
Application
CASTECH ES-435 is a ready to use admixture that is added to the concrete at the time of batching. The maximum effect is achieved when CASTECH ES-435 is added after the addition of 70% to 80% of the water. CASTECH ES-435 must not be added to the dry materials. Thorough mixing is essential and a minimum mixing cycle, after the addition of CASTECH ES-435, of 90 seconds for forced action mixers is recommended.
Curing
As with all structural concrete, normal curing methods apply.
Packaging & storage
Packaging
CASTECH ES-435 is available in IBC, 210-liter drums and in bulk tanks upon request.
Storage & shelf life
CASTECH ES-435 should be protected from extreme temperature. Should the material become frozen, it must be completely thawed and thoroughly mixed before use. CASTECH ES-435 has a minimum shelf life of 6 months provided temperature is kept within range 5°C to 30°C.
Health & safety
Health & Safety
CASTECH ES-435 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.