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Features / Advantages
- It controls the rate of setting of concrete and mortars.
- It improves workability and makes handling easier.
- It retains the workability for few hours
- It reduces segregation
- It can be used even for micro silica, fly ash and slag cement concrete
- It improves finished appearance of the hardened concrete.
- It reduces shrinkage and permeability of hardened concrete.
- It increases strength of the concrete and mortar.
- It reduces cracking.
- It eliminates formation of cold joints between subsequent pours in mass or structural concrete.
- It is based on Sulphonated Naphthalene formaldehyde polymers.
Usage
- Masterplast PLD is particularly recommended for concreting in hot climates, long or difficult pours, prestressed concrete in large sections or mass concreting.
- It is used in concrete of all classes.
- It is used more specifically in : Pavement concrete, Structural concrete, Ready mixed concrete, Bridge decks, Highway concrete, Light weight concrete and Expansive concrete.
Engineering Data
Specification Complies
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Indian
Standard Specification IS: 9103-1973
British Standard Specification
BS:5075 Part I
American Standard Testing Materials
ASTM-C-494, Type D & G |
Setting time change at 300C
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No admixture- 4 hrs
0-4 ltr. / 50 kg-5 ½ hrs |
Compressive strength % control
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3 days- 125%
7 days 115%
28 days 110% |
Flexural strength % control
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3 days- 100%
7 days 105%
28 days 110% |
Direction for use
Dosage
To get the required retardation of concrete mixes depends upon the ambient temperature and other factors. Hence trial mixes should therefore be performed. The normal dose is 0.1 to 0.75 Litre. per 50 Kg of cement. However, a dosage upto 1 Litre. per 50 Kg of cement can be used when micro silica, fly ash, slag cement etc., are present in the mix. Masterplast PLD should be added to the wet mix or mixing (gauging) water. It should not be added to dry cement. For addition of Masterplast PLD, a dispenser or exact measuring container is recommended. Stir well before use.
Cleaning of
tools & Equipment
Tools and equipments can be cleaned
with water.
Storage and shelf life
Store the material at a cool & dry place (preferably at 30 C Temp. or at room temperature).
Shelf life is two years.
It will freeze at (thawing) temperatures but can be reconstitured by stirring.
Packing
5 Litre, 20 Litre, 200 Litre, or as per requirements (For bulk quantities)
Precautions
- Do not mix it with dry cement.
- Add to mixing (gauging ) water or directly to the wet mix.
- Stir well before use.
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