Sika® Sigunit® SA 167

EN 934 - 5 : T2

Suspension

If stored in tightly closed original containers under the above conditions, it has a shelf life of 6 months. Periodical remixing can extend the shelf life further.

• Must be stored at minimum +5°C and maximum +35°C.
• Has to be kept in closed containers made of plastic, glass fiber or stainless steel.
• Must not be stored in normal steel containers.
• Storage in bulk tanks requires the use of agitation and/or circulation systems.
• After prolonged storage or transport we recommend to fully agitate it prior to use by mechanical stirring or re-circulation pumping.

1,45 - 1,49 g/ml at 20°C

675 ± 325 mPa.s

1,5 - 4,5

<0,1 (By mass)

Sika® Sigunit® SA 167 can be interchanged with most of Sika’s alkali-free accelerators. For advice please contact your local Sika representative. Do not mix or interchange Sika® Sigunit® SA 167 with any type of accelerator produced by another manufacturer, as this can cause immediate clogging of dosing pumps and hoses.

Sika® Sigunit® SA 167 is used for wet mix spraying, the w/c+b ratio should be below 0.5 and preferably <0.45. When targeting extremely high early strength, 0.40 or lower. The lower w/ c+b ratios provide faster setting, higher early strength, better durability, lower accelerator dosage and thicker layers can be applied overhead.

The substrate should be clean and free from loose particles and preferably damp. It is recommended to use only fresh cement as the age of the cement can have a negative influence on the setting characteristics of the mix. Sika® Sigunit® SA 167 can be sensitive to the type of cement. With some cements the setting characteristics can be too slow. We recommend the use of Portland cements (PC/HPC), which normally give faster setting than blended or sulphate resistant cement types. However Sika® Sigunit® SA 167 also works well with composite cements types (blended cements, fly-ash/slag). In all cases, it is strongly recommended to carry out preliminary tests to check setting and the 24 h strength of the cements planned for use in a project.

Evaluation of setting and 24 h strength should be carried out on a test mortar in accordance with EFNARC European Specification for Sprayed Concrete (1996), Appendix 1, Clause 6.3.

The following results should be taken as a performance guide only;

The consumption of Sika® Sigunit® SA 167 also depends on the w/c+b ratio, temperature conditions (concrete and ambient), cement reactivity and on required layer thickness, setting time and early strength development. The consumption is normally in the range of 3 to 10% of binder weight. Overdosing (>10%) may result in decreased final strength.

Sika® Sigunit® SA 167 is added at the nozzle. It is essential to have a constant and accurate dosage of accelerator into the concrete stream. To ensure quality sprayed concrete, follow the pump selection guidelines given below:

Works very well with;

• Mono pumps (stator & rotor pumps)
• Peristaltic pumps (Bredel)

Should not to be used with;

• Piston pumps
• All pumps with ball and seat valves
• Pressure tanks
• Gear pumps

Do not use a filter on the suction hose as this causes obstructions. Preferably draw the material off the bottom of the drum/container.

After the use of Sika® Sigunit® SA 167, the dosing pump and other parts of the system must be thoroughly cleaned with plenty of water. Failure to do so provokes blockages in the dosing system when next used. Make sure that all operators involved in testing and application are fully informed.