Features / Advantages
- It controls the rate of setting of concrete and mortars.
- It improves workability and easier handling.
- It reduces segregation.
- It improves finished appearance of hardened concrete.
- It reduces shrinkage and permeability of hardened concrete.
- It increases strengths of concrete and mortar.
- It reduces cracking.
- It eliminates formation of cold joints between subsequent pours in mass or structural concrete.
Typical Applications
- Masterspeed-RTD is particularly recommended for concreting in hot climates, long or difficult pours, prestressed concrete in large section or mass concreting.
- It used in concrete of all classes.
- Structural concrete
- Bridge decks
- Highway concrete
- Light weight concrete and
- Expansive concrete
Engineering Data
| SPECIFICATION COMPLIES |
|
Indian Standard Specification IS:9103-1975
British Standard Specification BS: 5075-1974 Part I
American Standard Testing Materials MSTM-C-494, Type |
| Setting time change at 38°C |
|
No admixture Normal dose Double dose
4 Hours 51/2 Hours 72/2 Hours |
| Compressive strength, % control |
:
:
: |
3 days - 125 %
7 days - 113 %
28 days - 110 % |
| Flexural Strength, % control |
:
:
: |
3 days - 100 %
7 days - 100 %
28 days - 101 % |
Direction for use
Dosage
To produce the required retardation of concrete mix it depends upon the ambient temperature and other factors. Hence trial mixes should therefore be performed. The normal dose is 140 cc per 50 kgs. Bag of a cement Double and triple dose of 280 cc and 420 cc can be used.
Masterspeed-RTD should be added to the sand or mixing (gauging) water. It should not be added to dry cement.
For addition of Masterspeed-RTD a dispenser or exact measuring container is recommended.
Stir well before use.
Cleaning Tools & Equipments
Tools and equipments can be easily cleaned with water.
Storage & Shelf Life
Store the material at Cool 7 Dry place (at 25 C. temp. & 50% RH).
Shelf life is one year
It will freeze at freezing (thawing) temperatures but can be reconstituted by stiring.
Packing
1 ltr, 5 ltrs, 20 ltrs, 200 ltrs.
Precautions
Do not mix it with dry cement.
Add to mixing (gauging) water or directly to the mix.
Stir well before use. |
