Sikacrete®-145 IN
Superior performance non-shrink cementitious microconcrete for concrete repair
Sikacrete®-145 IN is factory designed pourable, shrinkage compensated, free flowing and self-compacting superior performance microconcrete with selected cement, aggregate and other chemicals. Recommended water and coarse aggregate to be added at site as per requirement.
- No vibration needed
- Easy to mix and apply
- Good flow characteristics
Usage
Sikacrete®-145 IN is suitable for producing high performance micro-concrete for deep repairs to all concrete structures such as:
- Highway bridges and culverts
- Wharfs and jetties
- Tunnels and mines
- Dams and reservoirs
- Car parks and basements
- Power stations
- Sewerage and water treatment structures
- Anywhere where localised deep repair is required
- Anywhere additional thickness is required (column and beam jacketing, etc.)
- Structural strengthening of structure by section enlargement
Packaging
30 kg bag
Advantages
- No vibration needed
- Easy to mix and apply
- Good flow characteristics
- Quick strength development
- High ultimate strengths
- Good pumping properties
- Adjustable consistency
- Impact resistant
- Non-corrosive
- Non-toxic
- Iron and chloride free
- Non-shrink
- Good bonding with existing concrete
- Low porosity dense concrete
Colour
Powder / Grey
Product Details
Chemical base
Portland cement, selected fillers and aggregates, special additives
Shelf life
6 months from date of production
Storage conditions
The product must be stored properly in undamaged and unopened, original sealed packaging, in dry conditions at temperatures between +5 °C and +35 °C. Protect from moisture, direct sunlight and frost.
Maximum grain size
Dmax : 2.36 m
Compressive strength
Curing time | Compressive strength |
| 1 day | ~15 N/mm2 |
| 3 days | ~25 N/mm2 |
| 7 days | ~35 N/mm2 |
| 28 days | ~50 N/mm2 |
Values measured at water : powder = 0.15, cube size 70.6 mm, curing temperature +30 °C
Flexural strength
Curing time | Flexural strength |
| 7 days | ~5 N/mm2 |
| 28 days | ~7 N/mm2 |
Values measured at water : powder = 0.15, curing temperature +30 °C
Tensile adhesion strength
| ≥ 2 N/mm2 (28 days, +30 °C) | (EN 1542) |
Shrinkage
Nil
Expansion
1 to 4 % (Unrestrained expansion) | (ASTM C827) |
Application
Mixing ratio
Water : Powder = 0.14 to 0.16 (by weight)
4.2 L to 4.8 L water per 30 kg bag, dependent on the desired flow
Fresh mortar density
| (2.2 ± 0.1) kg/L (water : powder = 0.15) | (EN ISO 2811-1) |
Layer thickness
Minimum | 25 mm per pour |
Maximum | 100 mm per pour |
Higher layer thickness can be done with addition of aggregates. Contact Sika Technical Services for additional information.
Flowability
| Time | Flow in mm |
| Initial | ~280 |
| After 10 minutes of mixing | ~260 |
Ambient air temperature
+5 °C min. / +40 °C max.
Substrate temperature
+5 °C min. / +40 °C max.
Pot life
~20 minutes (water : powder = 0.15, +30 °C)
Curing time
7 days minimum (by spraying water), Full cure 28 days
Consumption
~1900 kg of powder per m3 of concrete (water : powder = 0.15)
Yield
One 30 kg bag yields ~15.68 L of fresh mortar at water : powder = 0.15
EQUIPMENT
Sikacrete®-145 IN can be mixed both in paddle type and slow speed (max. 500 rpm) grouting mixer or drum type concrete mixer.
MIXING
- Place about 80–90 % of the premeasured clean water into a clean mixer and gradually add the whole bag of Sikacrete®-145 IN into it while continuously mixing.
- Add the remaining water and additional clean 5–10 mm aggregates (if needed as per design) until the desired consistency is obtained.
- Mixing time should be minimum 3 minutes.
IMPORTANT
Concrete can also be produced with addition of 10 mm down properly graded silt-free aggregate in proportion of 2 : 1 (Sikacrete®-145 IN : coarse aggregate) by weight.
IMPORTANT
Do not mix more material, which cannot be used within pot life.
IMPORTANT
Do not add extra water.
IMPORTANT
Mix only full bags for best results.
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
IMPORTANT
Formwork
Ensure formwork is secure and watertight to prevent movement and leaking during placing and curing.
IMPORTANT
Working in thick sections
Do not pour more than 100 mm of layer thickness without addition of aggregates.
Small localised repairs
Small volume mixing may carried out with a suitable low-speed (500 rpm) drill and mixing paddle. After mixing, stir lightly with a spatula for a few seconds to release any entrapped air. The microconcrete is then poured immediately into the prepared formwork.
Large repairs
When carrying out large scale repairs or column / beam jacketing, ensure sufficient pressure head is maintained for uninterrupted concrete flow. Formwork must be firmly placed and kept watertight. When placing micro-concrete over large area, it is important to maintain a continuous flow throughout the process. Work sequence and equipment must be properly organised to ensure an uninterrupted flow of microconcrete. Ensure proper air displacement when pouring. In large areas, microconcrete may be mixed and pumped using heavy duty screw feed and piston pumps. Equipment suitability should be tested and checked prior to actual grouting works.
Cold weather working
Consider storing bags in a warm environment and using warm water to assist with achieving strength gain and maintaining physical properties.
Hot weather working
Consider storing bags in a cool environment and using cold water to assist with controlling the exothermic reaction to reduce cracking and maintaining physical properties.
CURING TREATMENT
Formwork must remain in place for at least 3 days. Upon removal of the formwork, cure the exposed surfaces immediately with Sika Antisol® curing compound or use other approved curing methods.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened or cured material can only be removed mechanically.