Description
EMACO S66 T is a high strength precision concrete, requiring only the on-site addition of water to provide a free flowing concrete ideally suited for placing in nominal thicknesses of 40mm and above.
When mixed, applied and cured in accordance with the manufacturers instructions, EMACO S66 T produces a free flowing precision concrete free from segregation and bleeding.
Primary uses
Whenever a material is required to reconstruct heavily congested areas and areas with difficult access.
EMACO S66 T is the ideal material for vertical or horizontal structural repairs wherever the use of formwork is preferable to hand or machine applied repair systems.
Its high early and ultimate strength enables formwork to be stripped at an early age thus minimising delays.
Due to its rheoplastic nature, EMACO S66 T can be utilised as a grout and poured under a head of pressure. EMACO S66 T should not be used where the depth of voids to be filled is less than 20mm.
Used as the capping medium in conjunction with MASTERFLEX 610 in the BASF pile head waterproofing system. For further details of this system, please contact your BASF representative.
Typical applications
General repair and renovation of decayed, defective or damaged concrete such as:
- Columns
- Walls
- Beams
- Honeycombed concrete
- Floors
Composition
EMACO S66 T is a pre-packaged blend of Portland cement, carefully graded natural aggregate, specially selected sands, fillers, shrinkage control agents and fluidifiers. When mixed with the stated amount of water it produces a free flowing, cohesive, precision concrete that hardens to produce a dense, durable surface.
Advantages
- Guaranteed performance - material is precision blended in the factory to ensure consistent results.
- Durable - utilisation of low water cement ratio ensures minimum permeability and high durability.
- Free flowing - eliminates honeycombing in areas of congested reinforcement.
- Self compacting - ensures complete filling of spalled/damaged areas.
- Shrinkage compensated - unique formulation provides dual expansion system in plastic and hardened states.
- Easy to use - simple on site addition of water.
Typical properties*
| Wet density: |
approx. 2300 kg/m³ |
| Compressive strength at 20°C BS 1881 Part 116: |
>25 N/mm² at 1 day >35 N/mm² at 3 days >45 N/mm² at 7 days >65 N/mm² at 28 days |
| Indirect tensile strength BS 1881 Part 117: |
2.8 N/mm² at 28 days |
| Resistivity : |
10000W |
| Water penetration DIN 1048 Part 5: |
>30 times better than low permeability concrete |
| Co-efficient of oxygen diffusion |
7.33 x 10-9 |
Packaging
EMACO S66 T is supplied in 25kg bags.
Method of use
EMACO S66 T is a versatile repair and renovation mortar. Surface preparation, method of use etc. are dependent on the job in hand. Detailed below are general guidelines for the use of EMACO S66 T. For full specification details and advice on specific repairs contact your local representative.
Application procedure
Preparation:
It is essential that the surface of the concrete to be repaired is sound, clean and uncontaminated. Corrosion must be removed from steel reinforcement before application of EMACO S66 T. In certain instances where there is a significant loss of section, the steel may have to be replaced. Defective areas should have a 20mm deep saw cut made around the perimeter. Cut back all defective concrete to a sound base. Feather edging must be avoided.
Care should be taken to ensure formwork is water tight and constructed in line with normal concreting practice. The use of formwork tape is recommended in order to eliminate grout loss. The unrestrained surface of the repair should be kept to a minimum and care should be taken to ensure at least 20mm cover to reinforcement. Soaking prior to placement is essential and provision should be made for drainage outlets. Where EMACO S66 T is to be poured ensure access is available and a head of pressure can be maintained.
Priming:
Prime reinforcing steel with 2 coats of CONCRESIVE ZR.
Areas to be repaired should be soaked with water for several hours prior to application of EMACO S66 T to minimise local absorption and to assist in the free flow of the concrete. Before placing ensure concrete surfaces are damp but free of standing water and seal drainage outlets. Ensure formwork is secure to prevent movement during placing and curing.
Providing the substrate has been thoroughly soaked priming is not normally necessary.
The use of CONCRESIVE 1414, epoxy bonding agent is recommended where high soluble salts are present in the parent concrete. CONCRESIVE 1414 epoxy bonding agent is recommended as it prevents migration to the repair of deleterious salts such as chlorides or sulphates as well as bonding new concrete to old.
When CONCRESIVE 1414 is used, pre-soaking is not necessary, but care should be taken to ensure formwork is erected and EMACO S66 T placed within open time of CONCRESIVE 1414 (generally within 8 hours) at 25°C.
Mixing:
Since EMACO S66 T is a precision concrete it is important that care is exercised in mixing and placing. It is essential that a mechanically powered mixer is used or suitable drill and paddle. The specified amount of water to obtain the desired consistency can be varied according to site conditions but should not exceed 3.5 litres per 25kg bag.
Under no circumstances should EMACO S66 T be re-tempered by the later addition of water. Damp down the inside of the mixer with water prior to mixing the initial batch of EMACO S66 T. Ensure the mixer is damp but free of standing water. Add the pre-measured quantity of water. Slowly add the EMACO S66 T powder mixing continuously. Mix for 3 to 5 minutes until a smooth, uniform, homogenous mix is achieved.
Placing:
EMACO S66 T should be placed in a single continuous operation. Poured material should be introduced slowly to prevent entrapment of air. It is essential to place the mixed material within 30 minutes of batching.
Curing:
As with all cementitious material curing is of vital importance to ensure that optimum properties are obtained.
Subsequent surface finishes:
It is recommended that products from the MASTERSEAL range of protective finishes be applied. Where it is necessary for aesthetic reasons to blend the repair into the background the use of MASTERSEAL 550 is recommended.
Note: In addition to shrinkage compensation, this product has been designed to develop tensile strength sufficient to withstand the internal stress generated by volume change to reduce the incidence of drying shrinkage cracking.
Cleaning
Treat as concrete. Clean all tools with water immediately after use. Hardened material can be removed using mechanical means.
Coverage
Yield approximately 12.5 litres per 25kg.
Storage
Store out of direct sunlight, clear of the ground on pallets protected from rainfall. Avoid excessive compaction. Shelf life is 1 year when stored as above.
Safety precautions
As with other products containing Portland cement, the cementitious material in EMACO S66 T grout may cause irritation. In case of contact with eyes, immediately flush with plenty of water for at least 15 minutes. Call a physician. In case of contact with skin, wash skin thoroughly.