CEM9000

High Performance Non-Shrink Cementitious Grout For Underwater Applications

CEM9000 is a ready-to-use, durable, non-metallic, flowable, high strength, cementitious and one component non-shrink grout. It is designed for repair and grouting underwater structure with low washability characteristics.

 

CEM9000 comprises of a balanced blend of washed and graded silica sands, finely crushed Portland cement, flow improvement compounds and an inorganic shrinkage compensation additive, which densifies the grout.

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Technical Data Sheet

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USES

CEM9000 can be used in many underwater application fields including:

  • Structural columns
  • Bearing plates
  • Anchor bolts
  • Tilt up panels
  • Precast columns
  • Foundations

ADVANTAGES

  • Requires only addition of water.
  • Easy to mix and apply.
  • High Cohesion characterstics
  • Pumpable with adjustable consistency.
  • Non-shrink eliminates shrinkage normally encountered in cement systems.
  • Provides an early high strength.
  • Contains no ferrous metal, and therefore will not stain due to corrosion.
  • Resistant to oil and water penetration.
  • Low permeability.

PACKAGING

 

Product Packaging
CEM9000 50 Lb (22.7 kg) Bag

TECHNICAL

Time of Setting, ASTM C-191 at 77 ºF (º25)

Above water Initial Set time 18 min
Final Set Time 27 min
Under water Initial Set time 22 min
Final Set Time 42 min

 

Water Demand: 0.9 gal /50lbbag (3.4 L/22.7 kg bag)

Mixed Density:  18.3 lb/gal (2.2 kg/L)

 

Compression Strength, ASTM C-109 at 77ºF (º25)

  Time Psi MPa
Above water 24 hours 3970 27
7 days 6300 43
28 days 8080 55
Under water 24 hours 3080 21
7 days 3800 26
28 days 6170 42

 

Initial Strength (Above water)

 

 

 

 

 

 

 

 

 

Initial Strength (Under water)

 

 

 

 

 

 

 

 

 

 

Gravel: grouting 3 inch cavities or more, add up to 50% by weight washed clean pea gravel of size 8-10 mm to CEM9000.  Water mixing ratio remains the same.

APPLICATION

Surface Preparation:

 

Concrete Surfaces: the concrete must be clean sound and free from oil, grease, laitance dirt and loosely adhering particles.  The surface should be scrabbled to remove the laitance and expose aggregate.  Bolt pockets, gaps, etc. must be blown with oil free, clean compressed air to remove any dirt and debris.

 

Steel Surfaces: the base plates, machinery bolts, etc. must be clean and free from oil, grease and rusting.  Degreasing shall be carried out thoroughly, in case of any contamination.

 

Formwork: before placing formwork, ensure the equipment is set and aligned.  If any levelling shims are to be removed upon initial setting of grout, apply a thin layer of releasing agent such as grease for easy removal.  Ensure the formwork is secure and firm as per the formwork design, maintaining the gap between formwork and the base plate. The gap should be wider on the pouring side than the opposite side.  Slant forms at a 45° angle on placing side 6mm or more from bed plate base.

 

Mixing: CEM9000 is cement based.  Do not exceed limitations set by ACI in mixing or placement of concrete.  CEM9000 must be mixed mechanically, using a slow speed electric drill fitted with mixing paddle. Larger quantities may require conventional power mixers.

Measure the required quantity of clean water. Pour approx. 2/3 of the measured quantity of water into the container/mixer then add CEM9000 slowly while mixing.  Add the remaining water and mix until a smooth, uniform homogenous consistency is achieved.  Mix batch for a minimum of 5 minute and place immediately. Do not attempt to re-temper with the mixed CEM9000 by the later addition of water.

 

Placing: foundation, bedplate and CEM9000 shall be maintained above 5°C for 24 hour following placement.

To avoid air pocket formation, pour grout from slanted form surface or center entrance point only.  Anchor support elements to prevent movements.  Use sufficient vent holes to bleed off entrapped air when placing grout.  CEM9000 may be pumped to extend movement without bleeding.

Maintain the continuity of grout flow preparing batches of mix CEM9000 grout made readily available.  Lengths of chains may also be employed in the formwork prior to placing which enables grout for free flow over large areas and to ensure evacuation of entrapped air.

 

Use chains, rods, or tamping to compact grout and remove voids, strike off exposed areas.

 

Cover immediately after placement with wet burlap or polyethylene.

 

Curing: the surface of the freshly laid grout should be protected from direct sunlight and cured.  To prevent rapid water loss, cover with wet Hessian with continuous water sprinkling is essential immediately after placement of the grout.

 

Large Scale Repairs and Renovations: CEM9000 grout may also be used in large scale repairs that can be shuttered, e.g.: retaining walls, column extensions, large honeycombs, etc.

 

Cleaning: CEM9000 should be cleaned from tools, equipment, etc. with clean water immediately after use.

STORAGE

CEM9000 has a shelf life of 12 months when stored in cool and dry conditions in unopened bags.

SAFETY

CEM9000 is a non-flammable and non-toxic in nature.  Avoid contact with eyes and skin as it may cause irritation due to its alkaline nature.  Splashes of CEM900 should be washed off immediately with clean water.  Wear necessary gloves and dust mask.

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