Sika Sikaset 45

Product Description

Sika Sikaset 45 is a one component magnesia phosphate based, rapid hardening and high early strength concrete repair and ironwork bedding mortar for use in temperatures as low as 0°C.

Best Uses

Sika Sikaset 45 is formulated as a rapid repair mortar for horizontal concrete surfaces. SikaSet 45 is ideal for industrial floors, roads, runways, bridge decks and car park decks. It is also suitable for filling mortar for voids and honeycombed areas in concrete and bedding mortar for inspection chambers, manhole covers, gully grates, stanchion posts, and street furniture.

• Easy to use just add water
• Can be placed at low temperatures
• Good un-primed adhesion
• High early age and ultimate strengths
• Shrinkage compensated mortar
• Trafficable within 1 hour
• Increased resistance to de-icing salts
• Non corrosive to steel
• Durable freeze thaw resistance
• Can be over coated

Application

Breakout and remove all concrete designated as being defective, loose and unsound, using suitable mechanical equipment. Ensure sufficient concrete is removed from around reinforcement to allow priming of the steelwork and compaction of the repair material. At the repair locations, feather edging should be avoided. The edges should be square cut to at least the recommended minimum application thickness of the repair material. Where a saw cut is employed, the substrate should be roughened mechanically to provide a ‘key’ between the repair mortar and substrate.

All exposed reinforcement should be thoroughly prepared to clean, bright metal, using abrasive blast cleaning or other approved methods. Where required, prior to applying SikaSet 45 into the repair area, apply two coats of SikaTop® Armatec 110 EpoCem onto the reinforcement in accordance with the product technical data sheet.

SikaSet 45 repair mortar should be mechanically mixed using a forced action mixer or in a clean drum using a drill and paddle. A normal concrete/mortar mixer is NOT suitable. Mix SikaSet 45 with water for at least 3 minutes to achieve a uniform consistency. 1.5-1.8 litres of water per 25kg. Immediately apply the mortar.

The prepared substrate should be thoroughly soaked with clean water until uniformly saturated leaving no standing water. The mixed mortar must be worked well into the prepared and pre-wetted substrate by gloved hand or trowel, filling all voids ensuring full encapsulation around exposed reinforcement. For maximum bond between existing concrete and the mortar when used for horizontal trafficable repairs. It is recommended that a bonding bridge consisting of a slurry produced by adding a small amount of water to the mix and brushed into the substrate is used (trial recommended). Apply mortar wet on wet and compact well. Apply in layers not less than the minimum thickness and no greater than the maximum thickness.

Where multiple layers are required the previous layers should be keyed and allowed to initially set prior to proceeding. For depths greater than 50mm a 10mm single sized coarse aggregate, complying with BS882 grading limits, may be added up to a rate of 10kg per 25kg of SikaSet 45 and remixed. Additional aggregates must be clean, saturated but surface dry, preferably low absorption and round in shape. Under no circumstances should admixtures or cement be added.

The final layer may be levelled using a steel/wooden tamp or straight edge where required. SikaSet 45 is best finished with minimal working using a wood/plastic float or a damp sponge, after initial set has taken place to obtain the required surface texture.