Fibre Reinforced Shrinkage Controlled Mortar for Concrete Repair
BETOCEM FIBRE is a cement mortar composed of high resistance hydraulic binders, silica sand, selected aggregates, special additives and synthetic fibers. The ready to use blend is supplied in dry powder which requires the addition of clean water only to produce an easily workable mortar with thixotropic effect.
BETOCEM FIBRE is supplied in 25 kg bags.
14.0 liters / 25 kg bag with 4.5 liters water addition.
The product must be kept in dry and sheltered place, in these conditions its shelf life will be 12 months.
|Density at 25ºC||
0 – 2.5 mm
|Thickness per coat||
10–50 mm vertical
10–25 mm overhead
10–100 small pockets & horizontal
|Water Impermeability (BS EN 12390 Pt 8)||
|Water absorption (BS 1881 Pt 122)||
|Compressive strength (ASTM C 579)||
|Tensile strength at 28 days (BS 6319-7)||
>3.5 N / mm2
|Flexural strength (ASTM C 580)||
|Drying Shrinkage (ASTM C157-93)||
|Linear thermal expansion (BS 6431-15)||
1 x 10-6 µm
|Workability at 25ºC||
from +5ºC to +35ºC
Test performed at 250C, 50% of relative humidity and in absence of ventilation.
All values are subject to 5-10 % tolerance
The surface of the concrete to be repaired should be sound, clean and uncontaminated. The decayed or damaged area to be repaired should be marked. Cut the marked area to a depth of at least 10mm using a hand held concrete saw or disc grinder to avoid feather edging and to provide a square edge. Break out or chip the complete repair area down to sound base using sharp tools or chipping hammer.
Oil and grease deposits should be removed by stiff brushing, detergent scrubbing with a heavy duty cleaner/degreaser or steam cleaning.
Any corroded steel in the repair area must be fully exposed. All exposed reinforcement shall be cleaned of corrosion products by wet grit blasting or other approved means to achieve a clean and bright finish. In case that reinforcing bars section is reduced due to oxidization, integrate them with additional bar reinforcement.
The cleaned steel should be coated within 3 hours. Apply one coat of BETOFER, a corrosion proof cementitious based primer or EPOZINC, a two component Zinc rich EPOXY PRIMER, continuously with brush onto the cleaned bar reinforcement ensuring that the whole steel surface area is completely covered. Allow to dry before proceeding with the repair.
If the concrete deterioration is due to Chloride attack, it is recommended to use EPORIPRESA, an epoxy
bonding agent. It will cure to form a barrier against Chloride ions.
However if the cause is Carbonation, dampen the surface with clean water (avoiding free standing water) and apply thin coat of AR LATEX RIPRESA, an Acrylic bonding agent.
BETOCEM FIBRE must be applied before the bonding agent dries while it’s still tacky to achieve a better bond between the fresh and cured section.
For mixing process, a slow speed drill (200- 300rpm) fitted with a suitable paddle is recommended. Place 4.0-4.5 liters of cold clean water in the mixing bucket. With the drill in operation, add the entire content of the 25 kg bag of BETOCEM FIBRE while mixing continuously till a uniform lump free consistency mix is achieved. Powder must always be added to water.
Allow the obtained mix to stand for about 3 minutes and then remix before application. Under no circumstances should partial mixing be considered.
Apply the product manually with a trowel or spatula with full compaction, to primed substrate while it is still tacky.
The minimum applicable coat thickness is 10 mm and the maximum thickness shall be 50 mm for vertical and 25 mm for overhead sections. For small horizontal sections thickness should be from 10mm up to 100 mm. Application thickness is dependent on repair size and granulometry. High build applications can be achieved through temporary formwork.
If the application of the second coat is necessary the previous layer should be cross hatched and allowed to take up its initial set before applying the next coat.
Use trowel or sponge for the finishing touch.
The repaired area shall be cured in accordance with good concrete curing practice and protected from drying winds, sun or excessive heat. Curing shall be done with non- degradable curing compound BETOCURE AR. Alternatively; a wet hessian cloth covered with polyethylene sheet can also be employed. Curing should begin as soon as final finish is achieved.
In fast drying conditions, supplementary curing with Polythene Sheets must be used.
BETOCEM FIBRE should be removed from tools and equipment and mixers with clean water immediately after use. Cured material should be removed mechanically.
Equipment used for applying EPORIPRESA, the epoxy bonding agent should be cleaned with SOLVENTE 10.
BETOCEM FIBRE can be harmful to skin as it contains cement powders which may releases alkalis when mixed with water. During application, wear appropriate protective clothing, goggles, gloves and respiratory equipment if necessary.
In case of contact with skin, rinse with water and again wash thoroughly with soap and water. In case of contact with eyes, rinse with plenty of water and seek medical advice accordingly. If ingested, obtain medical attention immediately. Do not induce vomiting.
The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.
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