Concrete Repair

Cement Based Repair Products

Monneli Betocem MC

Flowable, Non-Shrink Micro-Concrete

Uses
BETOCEM MC is designed to repair structural damaged concrete. It can be used in small, as well as, large repairing areas. It is ideal to be used in the following cases:
Replacing sections of concrete beams
Structural repairs for columns
Repair and fill deep honeycombed concrete
Provide hard wearing repairs to concrete flooring
Can be applied in structural membrane where steel reinforcement is congested or access to this area is difficult during casting the concrete
back to Concrete Repair
Technical Information
Product Description

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.

Advantages
  • Low alkaline and chloride free product
  • Economical product for mass concrete repairs
  • Excellent adhesion to concrete substrates
  • Compatible to all cementitious products
  • Non-shrink, with early strength characteristics
  • Can be poured manually or by pump
  • One component product which makes it easy to mix and apply at site
  • Hardened product exhibits high strength with low permeability
  • Free flow mix which minimize the risk of honeycomb and eliminate the need for vibration process without any risk of segregation
Packaging, Coverage / Consumption

Packaging:

BETOCEM MC is packed in 25 Kg bags.

 

Yield: 

12.5 liters / 25 kg bag with 3.5 liters water addition.

Shelf Life & Storage

Storage:

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.

Technical Properties
PROPERTIES

RESULTS

Appearance

Grey powder

Wet density at 25°C

2.3 kg/L

VOC

2.0 g/L

Granulometry

10mm

 

Compressive strength (ASTM C579)
at 7 days 46 N / mm²
at 28 days 65 N / mm²

 

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)

Low

Water absorption (BS 1881 Pt 122)

< 1.9%

 

Water penetration (BS EN 12391 Pt 8)

NIL

Setting time
Initial 2.5 hours
Final 4.5 hours

 

Workability at 25°C

>30 minutes

All values are subject to 5-10 % tolerance

Application Information
Instructions for use

Concrete preparation

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.

Steel preparation

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.

Priming

Steel Priming

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

Mixing

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.

Application

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.

Curing

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.

Cleaning

BETOCEM MC should be removed from tools and equipment and mixers with clean water immediately after use. Cured material should be removed mechanically.

Recommendations

  • Do not apply the product at temperature less than +5ºC
  • Do not add water once the mix has begun to set
  • BETOCEM MC should not be exposed to running water either during application or prior to final set
  • Do not mix the bags partially
  • In warm weather, store the material in cool place. Make sure to use cool water to keep the mixed mortar temperature below +30 ºC
Additional Information
Health & Safety

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.

Important note

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

additional materials
Fast Download
Technical Properties Sheet
download (*.pdf 0.29Mb)
OTHER PRODUCTS
More Products from this section
Monneli Betocem 2P

Two Component Polymer Modified Cementitious Mortar

Monneli Betocem Fibre

Fibre Reinforced Shrinkage Controlled Mortar for Concrete Repair

Monneli Betocem Flow

Fluid Non-Shrinking Mortar for Degraded Concrete Repair

Monneli Betocem HCS

High Compressive Strength Repairing Mortar

Monneli Betocem HR

High Resistant Mortar for Degraded Concrete Structural Repair

view more
RANDOM PRODUCT
Monneli Epofloor SLE50

High Performance Self Leveling Epoxy Flooring

Uses
Laboratories
Plant rooms
Car park
Warehouses
Pharmaceutical manufacturing
Connected products
Monneli Betofer

Corrosion-Proof Cement Slurry for Steel Reinforcement

Contact us
Choose a location
P.O. Box: 123808, Dubai
Toll: +971 4 8803488
Fax: +971 4 8803450
Site Map