Project specifications

Project Name

Urban Water Treatment Plant

Project Manager

Eng. Abbasi

Client

Mirash Company

Location

Bushehr

GFRC Panel

Mirash Custom GFRC Panel

Year of Execution

1402–1403

The Inab company, commissioned by Mirash Company, manufactured GFRC panels for constructing sand filters in water treatment plants.

These panels provide an innovative and efficient solution to challenges associated with traditional sand filter construction methods, such as difficult installation, high costs, and operational risks.

Leveraging over 20 years of industry experience and with certification from reputable laboratories, Inab designed and produced these panels to ensure easier installation, higher durability, and optimized performance in water treatment. Using GFRC in these panels offers advantages including high resistance to environmental and chemical factors, lighter weight compared to traditional concrete, and the ability to produce them in diverse shapes and sizes—all contributing to improved construction and operation of sand filters.


Advantages of Mirash Company’s GFRC Panels in Constructing Sand Filter Beds:

  1. Ease and Speed of Installation:
  • Installing the roots for the GRC support columns requires minimal precision and can be done easily.
  • By eliminating seat blades and replacing them with columns, the speed of concrete base and foundation construction is increased, reducing overall project time.
  • Since there are no seat blades, leveling is unnecessary because the columns are automatically aligned during the installation of the GRC panels.
  • The only step requiring high accuracy is the installation of seat columns with 150 mm PVC pipes and GRC panels, which can be easily done manually due to the lightweight nature of the panels.
  1. Improved Construction Quality and Elimination of Extra Steps:
  • Reinforcement and concrete pouring are carried out after the installation of the GRC panels, resulting in much higher quality compared to prefabricated methods.
  • This method eliminates the need for sealing joints, metal bolts, and special molds.
  • No filler materials, such as grout or mastic, are required for airtightness between slabs.
  • Monolithic concrete pouring is easily possible using ground pumps at any stage of the filter structure construction.
  1. Reduced Time and Cost:
  • The time required to prepare and install the GRC panels and pour integrated concrete for each filter unit is approximately 7 days, compared to about 15 days for prefabricated concrete slabs.
  • Economically, the cost of constructing an integrated base with GRC panels is about 20% lower than that of a base made with prefabricated concrete slabs.

Construction Method for Silica Sand Filter Beds Using GFRC Panels Produced by Mirash Engineering Company

         1. Foundation Preparation:

    • In the filter foundation, single rebar dowels are placed for the supporting columns of the integrated concrete bed, along with the GFRC seat molds.

         2. Leveling the Edge:

    • The top edge of the surrounding concrete walls of each filter cell is leveled using grout.

          3. Placement of GFRC Panels:

  • GFRC panels are positioned on the concrete walls and PVC middle columns side by side and bonded together using adhesive.
  • Simultaneously, the inside of 150 mm diameter PVC pipes is filled with concrete during the installation of the GFRC panels.

           4. Reinforcement and Concrete Slab:

  • Reinforcement of the integrated concrete slab is installed over the GFRC molds.

           5. Installation of Nozzle Shafts:

  • The nozzle shafts are installed in the designated slots within the GFRC molds, and protective caps are placed over the shafts.

           6. Concrete Pouring:

  • The concrete slab is poured as a monolithic structure over the GFRC molds.

           7. Final Assembly:

  • After the concrete has cured, the protective caps are removed from the nozzle shafts, and the filter nozzles are installed and secured.

 

 

Bushehr Urban Water Treatment Plant Project – Mirash Company

Reduced Time and Cost: The time required to prepare and install the GRC panels and pour integrated concrete for each filter unit is approximately 7 days, compared to about 15 days for prefabricated concrete slabs. Economically, the cost of constructing an integrated base with GRC panels is about 20% lower than that of a base […]