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Detailed installation of ivanet flat sheets

By on

July 18, 2019

- article

Bedding of installation of ivanet flat sheets:

  1. Wooden or steel beams used for installation must be up to the common code of building construction
  2. Beams must have necessary mechanical properties.
  3. Frame case supporting the flat sheets must be connected to the celling or the floor and the sheets should not tolerate any load because of this connection.
  4. Maximum distance for inner or outer walls for beams is 600 millimeters
  5. Bedding beams should be made in a manner that the edge of the sheets can be placed on them and be completely supported by them.
  6. Width of supporting beams should not be less than 38 mm.

 

To install glazed tile or earthenware (for bathrooms) on ivanet flat sheets below conditions must apply:

  1. Colum beams distance must be decreased to 400 mm.
  2. The distance between horizontal beams must be below 900 mm.
  3. Inner and outer edges and the surface of the sheets must be covered by water-proof concrete caulk
  4. Before installing glazed tile or earthenware make sure that the surface of the sheets are clean and doesn’t have any dust or oil on it.
  5. Use special glazed tile paste and apply it one meter at a time.
  6. Push the glazed tile on the paste to eliminate any air bubbles that may occur in the paste.
  7. The special paste must be made and used according to the instructions made by the manufacturer
  8. To install bathtubs or shower-bathes act according to below details

  

 

Method of installation and adjustment of avanet flat sheets in the façade of the building:

  1. Its recommended that the seam between the sheets on column and horizontal beams be alike or in other words aligned.
  2. It is recommended that the width of supporting surface of the sheets be at least 75 mm so installing wrenches in 20 mm of the sheets be possible.
  3. Horizontal Framing for 10mm flat sheets the maximum distance for horizontal beams must be 800 mm and for 12mm flat sheets it must be 900 mm.
  4. In Vertical framing the maximum distance for beams must be 600mm.

Vertical framing method: 1- seam between sheets 10mm 2- width of supporting surface must be at least 75mm

Horizontal framing: 1-seam between sheets 10 mm 2- the width of supporting surface must be at least 75mm

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Micro-sillies effect on fiber cement products

By on

July 15, 2019

- article

 

One of the most important reasons of using micro sillies on fiber cement products is the ability to complete the pozzolanic reaction

The word pozzolan comes from the name of ancient Italian city pozzuli in which soft volcano ashes were found that are usually mixed with calcium oxide to produce cement. As it is illustrated in figure 1 pozzolan with lime or calcium hydroxide Ca(OH)2 and water forms the paste of calcium silicate hydrate or CSH. This reaction is similar to the binding part of cement hydration. The hydration of type 1 Portland cement produces about 20% lime. Lime or calcium hydroxide is a week and dissolving material that does not contribute to resistance. The reaction between micro-sillies and the lime produced in hydration process produces paste and causes more resistance.

Figure1- micro-sillies with lime or calcium hydroxide and water produces paste phase of calcium silicate hydrate.

One of the other reasons to use micro-sillies is to fill the microtomic holes in the product:

The infinitely small size of micro-sillies fills the relatively big holes between the cement pieces and causes an increase in the resistance and durability. (Fig2 and 3)

Fig2: filler effect of micro-sillies on microtomic holes in fiber cement boards.

Fig3: the effect of different volumes of micro-sillies use in the bulk and diameter of holes in air cured fiber cement boards.

One of the other reasons to use micro-sillies on fiber cement products is to enhance the bending strength and the density and to reduce water absorbent:

In figures 4, 5 and 6 the effect of micro-sillies on the bending strength, density and water absorbent of fiber cement products are shown. Every 1% increase in micro-sillies use in fiber cement products causes an increase in bending strength by 0.5 Mpa or 5kg/cm2. Micro-sillies also causes an increase in plasticity in green sheets and prevent cracks happening while bending the corrugated sheets.

Fig6: the effect of different percentage use of micro-sillies on water absorbent of fiber cement boards.

Fig5: the effect of different percentage use of micro-sillies on the weight of fiber cement boards.

 

Fig4: the effect of different percentage use of micro-sillies on the bending strength of fiber cement boards.

The last main reason to use micro-sillies is to increase the freeze-thaw cycles of the product:

Freeze-thaw cycles causes expansion in the product which leads to the gradual separation of the layers in fiber cement products. Micro-sillies causes an increase in the cohesion between the layers and increases the freeze-thaw cycles. By increasing the use of micro-sillies by 5% swelling of the product after 700 freeze-thaw cycles in free air decreases by a factor of 1.3. For products which are made by auto claw by increasing the use of micro-sillies by 5% swelling of the thickness of the product after 1000 freeze-thaw cycles decreases by one third of the original amount.

Fig7: the effect of different percentage use of micro-sillies on the swelling of the thickness of fiber cement boards.

Fig8: the effect of different percentage use of micro-sillies on the swelling of the thickness of fiber cement boards produced by auto claw method.

 

 

 

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