Magneum Associates

Product Details:
Conbextra GP2 is supplied as a ready to use dry powder. The addition of a controlled amount of clean water produces a free fl owing, non-shrink grout for gap thicknesses up to 100mm. Conbextra GP2 is a blend of Portland cement, graded fi llers and chemical additives which impart controlled expansion in the plastic state whilst minimising water demand. The low water demand ensures high early strength. The graded fi llers are designed to assist uniform mixing and produce a consistent grout. 

Uses:
Conbextra GP2 is used for precision grouting where it is essential to withstand static and dynamic loads. Typical applications would be the grouting of base plates of turbines, compressors, boiler feed pumps etc., It can also be used for anchoring a wide range of fi xings. These include masts, anchor bolts and fence posts

Advantages:

• Gaseous expansion system compensates for shrinkage and settlement in the plastic state
• No metallic iron content to cause staining
• Pre-packed material overcomes onsite batching variations
• Develops high early strength without the use of chlorides
• High ultimate strength ensure the durability of the hardened grout
• Free flow ensures high level of contact with load bearing area

Standard Compliance:
Conbextra GP2 conforms to ASTM C1107 (Standard Specifi cation for Packaged Dry, Hydraulic-Cement Grout (Non-shrink).   

Technical Support:
An experienced technical advisory team is available to give technical service on request.  
Note:
This table is based on the following factors temperature - 300C ; Water saturated substrate; Minimum unrestricted fl ow width is 300mm. Note: The typical physical properties given above are derived from testing in a controlled laboratory environment. Results derived from testing fi eld-applied samples may vary, dependent on actual site conditions.

Performance Specification:

All grouting shown on the drawing must be carried out with a pre packed cement based product which is chloride free.
It shall be mixed with clean water to the required consistency. The grout must not bleed or segregate. A positive volumetric expansion shall occur while the grout is plastic by means of gaseous system.

Typical detail of stanchion base plate
The compressive strength of the grout must exceed 50 N/mm2 at 7 days and 60 N/mm2 at 28 days. The fl exural strength of grout must exceed 9N/mm2 @ 28 days. The fresh wet density of the mixed grout must exceed 2150 kg/m3 . The storage, handling and placement of the grout must be in strict accordance with the manufacturer’s instructions.   

Foundation surface
The substrate surface must be free from oil, grease or any loosely adherent material. If the concrete surface is defective or has laitence, it must be cut back to a sound base. Bolt holes and fi xing pockets must be blown clean of any dirt or debris

Pre-soaking
Several hours prior to placing, the concrete substrates should be saturated with fresh water. Immediately before grouting takes place any free water should be removed with particular care being taken to blow out all bolt holes and pockets.  

Base plate
It is essential that this is clean and free from oil, grease or scale. Air pressure relief holes should be provided to allow venting of any isolated high spots.

Levelling shims
If these are to be removed after the grout has hardened, they should be treated with a thin layer of grease.  

SikaGrout®-214 IN S is a cement based 1-component, ready to mix, non-shrink, ready to use, pourable and flowable, expanding engineering grout in dry powder form. It is widely used for precision grouting in engineering objects subjected to static and dynamic loads

Product Details:
Masterflow® 935 is a two-component, thixotropic, pure epoxy resin based chemical anchoring mortar. The product is specially designed for applications where heavy loads under critical conditions are to be fixed in concrete. Both components of Masterflow® 935, packed in a single cartridge with separate compartments, are correctly mixed in the mixing nozzle during application.

Fields Of Application:
 Masterflow® 935 is typically used in highly technical fixing situations like:

• Anchoring of rebars in preformed holes in concrete
• Fixing of anchoring bolts exposed to heavy loads
• Installation of bonded rebars / shear reinforcement 

Masterflow® 935 can also be used as a structural adhesive to glue metal elements onto concrete or to glue concrete elements together

Advantages:

• High adhesive power
• Fast curing time – saves time and money
• Easy to extrude
• Styrene free formulation – low odour
• High mechanical strengths
• Can be used in diamond drilled holes
• Applicable in slightly damp conditions
• Can be used at high temperatures
• Very low shrinkage, even on big diameters
• For interior and exterior use
• Specially suitable for technical applications
• For fixing in solid material like concrete or brickwork 

Notes:
Masterflow® 935 conforms to the norms NF P18-831 and NF P18-836, and is backed by the technical document “Cahier des clauses techniques du système de scellement d’armatures Masterflow® 935”, issued by BASF Construction Chemicals France and controlled by SOCOTEC.

Recommendations:
The performance, durability and safety of the installed product used for anchoring steel (rebar) strongly depends on the substrate, the dimensions of the element, the drilling and cleaning of holes, the substrate temperature and the type of anchoring bolt or bar. It is therefore important that a proper structural assessment of the structural elements to be repaired is carried out by qualified engineers, and that the choice of products, anchor types etc… is based upon such assessment. Guideline information on performance data and dimensioning is given in the tables hereafter. 

Application Guidelines:
Preparation
The substrate must be clean, structurally sound, and without substances which can have a negative effect on the adhesion of the chemical anchoring mortar. Concrete or mortars in which bolts or rods are to be fixed should be at least 28 days old.

Holes
Holes can be made using diamond or hammer drilling machines. Depth and diameter of the holes are to determined by the substrate, effective loads and the diameter of the anchor bolts or rebars. The drilled holes need to be cleaned with round brushes and oil-free compressed air directly from a compressor or using special hand pumps. The substrate can be damp, but must be without free standing water.

Using the cartridges
It is advised to store the cartridges in a warmer environment, since squeezing the Masterflow® 935 requires more effort at temperatures below 10°C. Remove the sealing plug and fix the mixing unit onto the cartridge. Place the cartridge in the extrusion gun and squeeze. Do not use the first few centimetres of material, until the mixed material is of uniform colour. During longer application interruptions, remove the mixing unit and put back the sealing plug.

Application in solid material
Insert the mixing unit of the Masterflow® 935 cartridge into the back of the hole and squeeze sufficient material while slowly pulling out. Ensure that no air is entrapped while filling the hole.