Product Data Sheet Show all documents

SikaCem®-900 Geo W

MULTI-APPLICATION HIGH STRENGTH GEOPOLYMER MATERIAL

SikaCem®-900 Geo W is a one-component, pre-packaged, ultrafine, fiber reinforced, high strength, and shrinkage-compensated geopolymer based wet-mix process shotcrete material formulated for a variety of applications.

SikaCem®-900 Geo W provides the following characteristics and benefits:   
  • Ready-for-use, one-component material; just add water,
  • Increased resistance to acids and other highly caustic environments,
  • Superior workability and shooting pumpability,
  • Superior abrasion resistance over conventional Portland cement mortar,
  • High bond strength ensures superior adhesion,
  • Compatible with coefficient of thermal expansion of concrete,
  • Good freeze/thaw resistance,
  • High early strengths,
  • Very low shrinkage,
  • Fiber reinforced.
Product Data Sheet Show all documents

Usage

SikaCem®-900 Geo W can be used in the following applications, but no limited to:   
  • Structural material for relining and rehabilitation of sewers, pipes, culverts, inverts, tunnels, manholes, sediment basins, wet wells, water and wastewater treatment plants, and industrial plants,
  • Multiple wet-mix process application techniques including high velocity shotcrete, low velocity spraying, and centrifugal spin casting,
 
  • Repair and rehabilitation of general concrete structures,
  • Vertical, horizontal, and overhead applications,
  • Application by hand trowel,
  • On grade, above grade, and below grade on concrete and mortar.

Advantages

SikaCem®-900 Geo W provides the following characteristics and benefits:   
  • Ready-for-use, one-component material; just add water,
  • Increased resistance to acids and other highly caustic environments,
  • Superior workability and shooting pumpability,
  • Superior abrasion resistance over conventional Portland cement mortar,
  • High bond strength ensures superior adhesion,
  • Compatible with coefficient of thermal expansion of concrete,
  • Good freeze/thaw resistance,
  • High early strengths,
  • Very low shrinkage,
  • Fiber reinforced.

Packaging

Available in 65-lb (29.5-kg) bags and 2,000-lb (908-kg) bulk bags.

Product Details

Product Information

Shelf Life

12 months in original, unopened packaging

Storage Conditions

Store in a dry, covered area, protected from the elements

For optimum performance it is recommended to store the material between 40°F - 95°F (5°C - 35°C)

Protect from moisture. If damp, discard material.

 
Technical Information

Abrasion Resistance

ASTM C1138

28 Days 

0.039 kg (0.26%) mass loss

1.22 in3 (0.28%) volume loss

Compressive Strength

ASTM C39 / C109

24 hours

2,500 psi (17 MPa)

  

ASTM C1604

7 days

5,500 psi (38 MPa)

28 days

8,000 psi (55 MPa)

Flexural Strength

ASTM C78

7 days900 psi (6.2 MPa)

28 days

1,200 psi (8.2 MPa)

Modulus of Elasticity in Flexure

ASTM C469

28 days

3.9 x 106 psi (26.8 GPa)

Shrinkage

ASTM C1090

28 days

0.02%

Chemical Resistance

 ASTM C267

Sulfuric Acid 84 day @ pH 1.0

Zero mass loss

Zero volume loss

Microbiological Resistance

DIN 19573

Class XWW4

14 day @ pH 0.0 Immersion

PASSED

Slant Shear Strength

ASTM C882

28 days

3,000 psi (20.5 MPa)

Freeze-Thaw Stability

ASTM C666

300 Cycles

Zero mass loss

No cracking or severe deterioration with light surface scaling

Splitting tensile strength

ASTM C496

7 days600 psi (4.0 MPa)

28 days

800 psi (5.5 MPa)

Application

Application Information

Mixing Ratio

7.5 - 8.0 pints per 65-lb bag (3.6 - 3.7 L per bag)

29 - 30 gallons per 2,000-lb bulk bag (109.5 - 113.5 L per bulk bag)

Ambient Air Temperature

40 °F - 95 °F  (4 °C - 35 °C) 

Substrate Temperature

40 °F - 95 °F  (4 °C - 35 °C) 

Set Time

Initial 

20 - 30 min

Final

30 - 40 min

Time begins when product is applied to substrate.

Fresh mortar density

136.4 lb/ft3 (2,184 kg/m3)
Consumption

Coverage

0.53 ft³ (0.015 m³) per 65-lb bag

0.60 yrd3 (0.465 m³) per 2,000-lb bulk bag

Yield figures do not include allowance for surface profile and porosity or material waste
Application steps

APPLICATION INSTRUCTIONS

Apply in accordance with the ACI 506 “Guide to Shotcrete” publication.

  

  • Performance of in-place shotcrete relies heavily upon application techniques.
  • The shotcrete material, equipment and key personnel should be pre-qualified prior to project start-up to ensure optimum quality of in-place shotcrete.

  

For other applications, contact your local Sika STM Technical Representative for more information.

 

OPTIMUM PERFORMANCE

   

  • Product should not be applied when ambient, substrate, and material termperatures are below 40 °F (5 °C) or above 95 °F (35 °C).
  • For adverse temperatures, follow ACI recommendations for Cold/Hot Weather Concreting.

SURFACE PREPARATION

  • Surfaces must be clean and sound. Remove all deteriorated concrete, dirt, dust, oil, grease, contaminants and other bond-inhibiting materials from the area to be repaired.
  • To ensure optimum repair results, the effectiveness of decontamination and substrate preparation can be assessed by a Pull-Off test (i.e Tensile Adhesion test per ASTM C1583).
  • Saw cut the perimeter edges of the repair area.
  • Remove any and all protruding material i.e brick, concrete, mortar, etc.
  • Ensure that any and all leaks are stopped prior to application.

MIXING

  • Place 75% of required water into mixer and slowly introduce entire bag of SikaCem®-900 Geo W while the mixer is running.
  • Allow SikaCem®-900 Geo W to mix for a minimum of five minutes.
  • Slowly add balance of required water until desired slump has been obtained, not exceeding maximum recommended volume of water.
  • Maximum recommended volume of water is 1-gallon (3.7-liters) per 65-lb bag, and 30-gallons (113.5-liters) per 2,000-lb bulk bag.
  • Continue mixing and stop only after material has reached a consistent, homogeneous mix.
 

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