POLYMER MODIFIED CEMENTITIOUS SYSTEMS

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POLYMER MODIFIED CEMENTITIOUS SYSTEMS
Odile QUET 6/07/06
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• DEFINITIONS AND BASIC CHEMISTRY

• Unmodified concrete is a mixture of Portland
  cement water inert filler (sand, stone,
  etc.).
• Concrete curing is due to hydration, a chemical
  reaction between Portland cement and water.
• Stoichiometric weight ratio of water/cement
  required for complete hydration is 0.28.
• Additional water is always present to give
  fluidity, but later evaporates to leave voids
  (weak spots).

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WHY TO USE A CEMENT MODIFIER ?
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MECHANISM OF POLYMER MODIFICATION

• Theories of the mechanism of polymer modification
  of concrete
• - Equal workability at significantly
  lower water level.
• - Polymer coalesces to coat cement
  particles and hold in water for hydration
  rather than evaporation.
• - The polymer film also enhances
  toughness and restrains micro-crack propagation.

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SEMs OF UNMODIFIED CONCRETE
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SEMs OF POLYMER MODIFIED CONCRETE
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MAIN PROPERTIES OF POLYMER MODIFIED SYSTEMS
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RELEVANT RATIOS IN CEMENTITIOUS SYSTEMS
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ADVANTAGES OF POLYMER MODIFIED SYSTEMS

• Good workability at lower water level
• Improved adhesion to a variety of substrates
• Increased flexural strength
• Improved toughness
• Resistance to ion permeability
• Outstanding durability.

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IMPACT OF POLYMER LEVEL ON FINAL PROPERTIES
(polymer modification level 15)
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IMPACT OF ACRYLIC POLYMERS ON CEMENT STRENGTH
PROPERTIES
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IMPACT OF POLYMER MODIFICATION LEVEL
Polymer modification level
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CEMENT MODIFIERS APPLICATION AREAS

• Repair mortars
• Self leveling flooring systems
• Cementitious flexible water proofing membranes
• Ceramic Tile Adhesives
• Cementitious paints
• Tile grouts
• Floor screeds
• Glass reinforced concrete
• EIFS (Exterior Insulation Finishing systems)

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CEMENTITIOUS SYSTEMS FORMULATIONPRINCIPAL
ADDITIVES
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SELF-LEVELLING AREA
Issues...

• Flow / reflow
• Set time
• Adhesion
• Abrasion Resistance
• Dimensional stability

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CERAMIC TILE ADHESIVES (CTA)
Issues...

• Workability / Open Time
• Water Resistance
• Flexibility
• Adhesion

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REPAIR MORTARS
Issues...

• Workability
• Flexural strength
• Adhesion
• Dimensional stability

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FLEXIBLE CEMENTITIOUS MEMBRANES
Issues...

• Flexibility
• Waterproof ness
• Tensile strength
• tear resistance

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PRODUCT RANGE BY APPLICATION
Highly recommended
Suitable
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PRIMAL E-330 EF IN BASIC REPAIR MORTAR
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PRIMAL SF-016 ER AS A CEMENT MODIFIER
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SF-016ER VERSUS E-330 EF
ER