Concrete water-reducing Retarder
Conforms to ASTM 494-80 Type 'D' and BS 5075
Part 1 (1982)
Conret is a
chloride-free water-reducing retarder. It
specially formulated to produce high density and
quality water¬tight concrete with excellent set
the duration of workability of the concrete and
so enables the concrete to be transportable from
batching plant to work site.
Cornet also helps
in preventing cold joints in massive volume of
concrete pouring, especially in placing concrete
during hot climatic conditions.
Conret helps to
facilitate the reduction of water/cement content
of the concrete by 10 to 15% for a given
workability and strength, in comparison with
plain mix concrete.
The use of Conret
therefore reduces the cost of concrete
production while maintaining high quality
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Facilitates the production of workable,
high strength, high density concrete.
Reduces the possibility of bleeding,
creeping and segregation by increasing
the cohesiveness of concrete.
Increases the duration of workability of
the concrete mix and prevents the
occurence of cold joints between batches
of concrete pouring.
Improves the workability and pumpability
of the concrete and so facilitates flow
and compaction around complex
Increases the compressive and flexural
strengths of concrete.
with Ordinary Portland Cement(OPC),
Rapid Hardening Portland Cement(RHPC)
and Sulphate Resisting Cement(SRC).
Note: Conret is not
recommended for use with High Alumina
Cement (HAC) or Low Heat Portland Cement (LHPC).
"Conret" should be
specified by name and used as per application
specification should be in accordance with the
requirements of British Codes of Practice CP114
(1969), CPI 15 (1968) and CP110 (1972).
- Add Conret at
a rate of 0.25 to 0.50 We per 100 kg of cement
together with the gauging water.
- For certain
harsh concrete mixes, use approximately 0.50
litre of Cornet per 100 kg of cement to improve
flow and compaction around reinforcement.
incorporated with Connet, a 10%o reduction in
water and cement content can be achieved for a
given strength requirement.
- A maximum
cement content reduction of 15% can be achieved
upon careful grading selection of aggregates.
- For gap-graded
(harsh) mixes and mixes with water-absorbent
aggregates, the cement content reduction may be
less than 10%.
- It is
important, therefore, to conduct site-trials to
determine the optimum cement content for any
given strength and workability of concrete.
Dark brown liquid
Dry Material Content
40 ± 1 To w/w.
No stable foam
Vicat plus 2 to 4 hours
depending on dosage rate.
25 litre, 210 titre drums and
250 to 500cc per 100kg of
Avoid extreme temperatures
prolonged contact with skin.
- Wash skin or
affected area with clean water.
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