Flowable, Non-Shrink Micro-Concrete
BETOCEM MC is a single component, cement based flowable non-shrink micro-concrete. It is composed of Portland cement, graded aggregates and special additives. It is formulated to achieve a high flowability mix with minimal water content which ensures early strength gain and long durability.
BETOCEM MC is packed in 25 Kg bags.
12.5 liters / 25 kg bag with 3.5 liters water addition.
Keep the product in dry covered place into original well closed packaging. In these conditions, the product will have a shelf life of 12 months from date of production.
|Wet density at 25°C||
|Compressive strength (ASTM C579)||
|Flexural strength at 7 days (ASTM C580)||
7.5 N / mm²
|Tensile strength at 28 days (BS 6319 – 7)||
4.0 N / mm²
|Slant shear strength (ASTM C 882)||
7.6 N /mm²
|Drying shrinkage at 28 days (ASTM C157-93)||
< 500 microstrain
|Coefficient of thermal expansion (BS 6431-15)||
1 x 10-6µm
|Chloride ion penetration (ASTM C1202)||
|Water absorption (BS 1881 Pt 122)||
|Water penetration (BS EN 12391 Pt 8)||
|Workability at 25°C||
All values are subject to 5-10 % tolerance
The surface of the concrete to be repaired should be sound, clean and uncontaminated. The boundary of the repair area should be cut using a concrete saw to provide a neat edge to the repair with no feather edging and to provide a square edge Repairs using BETOCEM MC should be generally at least 50 mm as a minimum depth with a maximum of 500 mm in single coat.
Oil and grease deposits should be removed by stiff brushing, detergent scrubbing with a heavy duty cleaner/degreaser or steam cleaning.
Prepare the formwork to be rigid and tight to prevent loss of material. The formwork should include drainage outlets for presoaking.
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 continuing.
BETOCEM MC must be applied before the bonding agent dries while it’s still tacky to achieve a better bond between the fresh and cured section.
To prepare the mortar, it is recommended to have a forced-mixer of spiral paddle in a slow speed (300/400 rpm) heavy duty drill. It is essential that machine mixing capacity and labour availability is adequate to enable the placing operation to be carried out continuously.
Add 3.3 – 3.5 liters of water in the mixing drum then add the full bag of BETOCEM MC and mix for at least 4 – 5 minutes till obtaining a fluid, uniform lump free consistency mix.
Do not part mix the bags, nor use additional water than specified. Note that powder must always be added to water.
To obtain the full benefit of the fluidity provided, apply BETOCEM MC immediately after mixing.
Cast the mortar into the formwork, allowing air to escape. It's advisable to spray the formwork by water prior to placing the mortar to avoid water absorption from the mix. 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.
BETOCEM MC should be removed from tools and equipment and mixers with clean water immediately after use. Cured material should be removed mechanically.
BETOCEM MC 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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