SpECgrout C1


SpECgrout C1 is a ready to use, one-part cementitious grout. The addition of clean mixing water, produces a non-shrink grout of predictable performance

Technical Details

SpECgrout C1 may be used in grouting applications, where a fluid/flowable grout is required and where consistency of performance is essential. Typical applications are as follows:
· Anchor bolts
· Turbine base plates
· Generator base plates
· Pressing and milling machine base plates
· Non-shrink
· Consistent performance
· High bond strength to concrete and steel
· High compressive strength at early ages allowing minimal downtime on machinery
· Low permeability

Typical Value at 20±3°C Compressive strength (ASTM C109) 

1 day 

25 N/mm² 

3 days 

45 N/mm² 
7 days 

55 N/mm² 

28 days 

65 N/mm² 

Flexural strength (ASTM C348) 

28 Days 

9.0 N/mm² 

Setting time (BS EN 196-3) 


6 hours 

7 hours 

Gap Width 





It is essential that adequate preparation is carried out prior to the application of SpECgrout C1. This preparation should ensure the removal of all grease, oil and loose material.

To avoid absorption and reduction in flow characteristics, it is essential that the prepared substrate is soaked with clean water for a few hours prior to grouting. Before placing the grout, any water remaining on the surface should be removed by blowing clean with oil-free compressed air.

The underside of the base plate to be grouted should be clean and any oil or grease MUST be removed. The underside should preferably have no geometry, which would impede the flow of grout. Should cruciforms be present, it is essential that air release holes are drilled through the base plate to avoid trapping air consequently reducing the total contact area.

All formwork should be sealed to prevent loss of grout during pouring. The formwork should be tight to the base plate and parallel to the direction of flow. A gap of around 100mm is required at the pouring hopper with a gap of around 50mm at the opposite end.

SpECgrout C1 is a one-part cementitious grout.

SpECgrout C1 must be mixed using a slow speed electric drill fitted with a SpEC Mixing Paddle. This method is suitable for small quantities and for larger quantities it may benecessary to consider the use of a grout pump. Please contact SpEC Technical Department for more advice on the type of pumps available.

The product cannot be mixed by hand

Good planning is essential to ensure a continuous flow of grout once pouring commences.

The specified water quantity should be measured in an accurately graduated vessel and added to the mixing vessel. The bagged powder is then added slowly whilst mixing. A mixing time of not less than five minutes is required to ensure adequate dispersal of the ingredients. The recommended water used per 25kg bag is 5.5 litre to 7.25 litre (for plastic/flowable consistency).

The grout should be poured immediately after mixing and certainly not more than 20 minutes after mixing is complete to take full advantage of the high flow properties.

Planning is imperative to ensure that sufficient grout is available to allow continuity of placing. The mixed product should always be poured from the hopper end of the formwork. On no account should grout be poured from more than one side of the base plate. Maintenance of a fluid head is essential to avoid air entrapment.
SpECgrout C1 is supplied in 25kg bags. Each bag when mixed with water will provide approximately 16.0 litres of mixed material depending on water addition.
Contact us for more info.

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SpECgrout C1

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