Verni-PS Mortar

                                               Verni-PS Mortar
ACID PROOF POTASSIUM SILICATE CEMENT
DESCRIPTION
Verni PS-Mortar is acid proof silicate cement, used in areas where elevated temperature performance (up to 700?C) and / or acid resistance is required.
FEATURES
With the exception of hydrofluoric acid, Verni-PS Mortar is resistant to all common organic acids at all concentrations.
It has no alkali resistance and therefore, MUST NOT BE USED WHERE ALKALI CONTACT IS POSSIBLE. In any application where the pH is likely to exceed 7, Verni-PS Mortar must not be applied.
The material is porous and MUST ALWAYS BE BACKED BY A MEMBRANE, e.g. polyisobutylene, butyl rubber sheet or fibreglass.
AREAS OF APPLICATION
The main areas of use are for bedding of acid resistant bricks in acid tanks, bund areas, floor surfaces and chimney linings.
Verni-PS Mortar can also be used as a pointing material for acid resisting bricks, e.g. acid towers. For stringent chemical applications, the brickwork joints should be as narrow as possible ideally, knife blade thin.
COMPONENTS
Verni PS-Mortar comprises 2 parts:
Part A Solution
Part B Powder
Part A can be supplied in bulk for larger requirements.
BILL SPECIFICATION
Verni PS-Mortar Acid Proof Potassium Silicate Cement applied to clients requirements as per the manufacturers (Verni Speciality Construction Products) specifications.
INSTRUCTIOS FOR USE
Application:
Verni-PS Mortar CANNOT BE LAID DIRECTLY ONTO CEMENT as the residual alkalis in the Portland cement attack the material.
Add the contents of the Verni-Ps Mortar solution pack (20kg) to a bucket. Then add the Verni-PS Mortar powder (50kg) and stir until uniform. DO NOT ADD SOLUTION TO POWDER, always powder to solution. NO WATER MAY BE ADDED TO THE MATERIALS OR MIXTURE AT ANY TIME.
The material is sensitive to temperature during application. Ideally, the ambient conditions should be between 10?C - 20?C. In colder conditions, bricks, solution and powder should be pre-warmed to 15?C -20?C.
For the pointing of thin joints, a lighter mix should be made using less powder. Powder should be added to the Verni-PS Mortar solution until the correct degree of workability is achieved. It should be noted, however, that if less powder is used, curing time is increased. Longer time must therefore be allowed to achieve the full cure.
The following day the Verni-PS Mortar pointing should be painted with 3 coats of a 10% solution of hydrochloric acid, the acid being left on the pointed surface until the tank or floor is commissioned.
The client must be informed of the need to keep the surface acidic. THE FLOOR/VESSEL MUST NOT BE WASHED OR FILLED WITH WATER BEFORE COMMISSIONING. Ideally the lining should be commissioned with acid or at least acidified water.
CLEANING OF TOOLS
Water
SAFETY
Harmful to skin. Protective gloves must be worn.
PROPERTIES
Material
Halogen free silicate mortar
Colour
Cream
Shelf Life
Powder: 12 months in a cool dry place.
Solution: Indefinite in sealed container
Density
SG2.0
Coverage
Bricks: 230 x 114 x 76 laid flat
450 Kgs per 1000 bricks
Bricks: 114mm independent wall
325Kgs per 1000 bricks
Setting Time
40 minutes at 20?C
Initial Cure: 24 hours at 20?C
Full Cure: 7 days at 20?C
Minimum Temperature
Laying 10?C Service 10?C
Maximum Temperature
Laying 30?C Service 700?C
Taint
Not food grade
2
Mechanical Properties
Comprehensive Strength 31Mpa
Transverse Strength 8Mpa
Tensile Strength 4Mpa
Adhesion to ceramic ware 3 Mpa
Thermal Conductivity 1.16watt/M?C
Co-efficient of thermal Expansion 1.2?C x 10-5
Modulus of elasticity 10.8Mpa/m? x 10?
Porosity 9%
Disclaimer
The information contained in this technical data sheet is to the best of our knowledge correct. We advise customers to satisfy themselves with the suitability of the product in their application. No guarantee is expressed or implied.
Customers are further advised to ensure that this data sheet is up to date as the information contained herein may be updated without notice.
Updated Aug 2004

Acid proof potassium silicate cement                             

  • Country:South Africa
  • telephone:27-27-0-82-822-9943
Acid proof potassium silicate cement
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