Conbextra EP120 constructive solutions

High strength, epoxy resin grout Properties

Pot life : 2 hours @ 23°C
Uses Tensile strength : 17 N/mm2 at 7 days
Flexural strength : 33 N/mm2 at 7 days
Provides a free flowing grout, for use where physical
Compressive strength : 120 N/mm2 at 7 days
properties and chemical resistance of the hardened grout
are of utmost importance. It is suitable for a wide range of
Coefficient of thermal expansion
heavy duty applications including :
ASTM C531 : 28.1 x 10-6
Underplate grouting to substantial structural elements.
Compressive creep
Base plate grouting in dynamic load situations such as
(ASTM C1181- 2.85N/mm²
turbines and other reciprocating machinery.
1 year, 60°C) : 2.05 x 10-3 mm/mm
Heavy industrial applications in steelworks, refineries
chemical plants and electroplating works.
Instructions for use
Structural infill where very high strength is required. Preparation
Rail track applications, to support heavy cranes, or on
Underplate grouting
transporter rails. The unrestrained surface area of the grout must be kept to a
minimum. Generally, the gap between the perimeter
Advantages
formwork and the plate edge should not exceed 120 mm on
the pouring side and 25 mm on the opposite side. Formwork
Excellent durability - high compressive, flexural and on the flank sides should be kept tight to the plate edge. Air
pressure relief holes should be provided to allow venting of
tensile strengths ensure a long working life.
any isolated high spots.
Cost effective - high early strength gain promotes
Formwork
minimum downtime and early commissioning of plant.
The formwork should be constructed to be leak proof as
User friendly - simple, full pack mixing to ensure that Conbextra EP120 is a free flow grout. This can be achieved
by using foam rubber strip or mastic sealant beneath the
the performance characteristics are achieved.
constructed formwork and between joints.
Versatile - suitable for a wide range of loading
For free flow grout conditions, it is essential to provide a
situations including repetitive dynamic loads.
hydrostatic head of grout. To achieve this a feeding hopper
Excellent in service performance - non-shrink should be used - please consult your local Fosroc office for
more details.
capability ensures full surface to surface contact.

Description Foundation surface

This must be free from oil, grease, or any loosely adherent
Conbextra EP120 is a solvent free epoxy resin grout material. If the concrete surface is defective or has laitance,
designed for grouting of gap widths of 10 to 75 mm. It is it must be cut back to a sound base. Bolt holes or fixing
supplied as a three component system consisting of base, pockets must be blown clean of any dirt or debris.
hardener and specially graded aggregate. The components Base plate
are supplied in the correct mix proportions designed for If delay is likely before placing steel base plates, it is
whole pack mixing on site. recommended that the underside and edge are coated with
Nitoprime 25* to prevent rust formation and ensure bonding
with the Conbextra EP120 grout. All metal surfaces should
Specification be cleaned to a bright finish in accordance with Swedish
Where shown on the contract documents, the epoxy grout Standard SA 2½ or equal. Nitoprime 25 can be applied
directly onto newly cleaned steel surfaces even if they are
shall be Conbextra EP120 supplied by Fosroc. It shall
damp.
provide good general chemical resistance, 7 day
compressive strength of at least 120 N/mm2 and a
compressive creep of 2.85N/mm² in accordance with ASTM
C1181

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Conbextra EP 120
Mixing Limitations
- Grouts should not be placed in any unrestrained situation,
The entire contents of the hardener can should be poured i.e. base plate plinths, etc. Failure to comply may lead to
into the base container and mixed until homogeneous. crack development in the grout.
Place the mixed base and hardener into a suitable forced
action mixer making sure that the entire volume is poured Estimating
in. Add the aggregate and mix for 2-3 minutes or until
uniform colour is achieved. Once mixed, the material must
be used within the specified pot life (see under Properties). Supply
After this time, unused material will have stiffened and Conbextra EP120 : 10 litre packs
should be discarded. Nitoprime 25 : 1 and 4 litre packs
Fosroc Solvent 102 : 5 litre packs
Note: Immediately prior to placement, all surfaces must be Coverage
dry. Nitoprime 25 : 4.0 t0 5.0 m2/litre

Placing Storage

Ensure that the grout can be placed within its pot life. When stored in warehouse conditions below 35°C,
Continuous grout flow is essential. Sufficient grout must be Conbextra EP120 will have a shelf life of 12 months.
available prior to starting and the time taken to pour a batch
must be regulated to the time taken to prepare the next one. Precautions
Pouring should be from one side of the void to eliminate air
entrapment. The hydrostatic head must be maintained at all
Health and safety
times so that a continuous grout front is achieved.
Some people are sensitive to epoxy resin so gloves and a
Cleaning barrier cream such as Kerodex 71, Rozalex 9, Debba-Wet
Work or similar should be used when handling these
All tools and equipment should be cleaned immediately after products. If contact with the resin occurs, it must be
use with Fosroc Solvent 102*. removed before it hardens with a resin removing cream
such as Kerocleanse 22 or Rozalex 42. Follow by washing
Hot weather working with soap and water.

Do not use solvent. The use of goggles is recommended

Whilst the performance of Conbextra EP120 at elevated
temperatures is assured, application under such conditions but should accidental eye contamination occur, wash
can sometimes be difficult. It is therefore suggested that, for thoroughly with plenty of clean water and seek medical
temperatures above 35°C, the following guidelines are treatment immediately.
used:
Fire
(i) Store unmixed materials in a cool (preferably Nitoprime 25 and Fosroc Solvent 102 are flammable.
temperature controlled) environment, avoiding
exposure to direct sunlight. Flash points
Nitoprime 25 : 39°C
(ii) Keep mixing and placing equipment cool, arranging
shade protection if necessary. It is especially important Fosroc Solvent 102 : 33°C
to keep cool those surfaces of the equipment which
will come into direct contact with the material itself. * Denotes the trademark of Fosroc International Limited
(iii) Try to eliminate application in the middle of the day,
† See separate data sheet
and certainly avoid application in direct sunlight.
(iv) Ensure that there are sufficient operatives available to
complete application within the material’s pot life.

Important note
Fosroc products are guaranteed against defective materials and manufacture and are sold subject to its standard Conditions for the

PT.FOSROC Supply of Goods and Services, copies of which may be obtained on request. Whilst Fosroc endeavours to ensure that any advice,
recommendation, specification of information it may give is accurate and correct, it cannot, because it has no direct or continuous control

Indonesia
over where or how its products are applied, accept any liability either directly or indirectly arising from the use of its products, whether or
not in accordance with any advice, specification, recommendation of information given by it.

Jl.Akasia II Blok A8 No.1

Delta Silicon Industrial Park telephone: fax: email:
Lippo Cikarang
+62 21 897 2104-06 +62 21 897 2107 Indonesia@Fosroc.com
Bekasi 17550
Indonesia +62 31 854 9704 +62 31 894 9845
www.fosroc.com

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