The First CPWD & CRPF Project using PRECAST for Housing Sector

The First CPWD & CRPF Project using PRECAST for Housing Sector

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Teemage Precast In, india’s Leading Service Provider for Design & Construction of Precast Buildings was recently awarded the first CPWD & CRPF Housing Project using Precast Concrete Technology in Coimbatore, Tamil Nadu. This project is a major step forward for this sector and can become a game-changer for the industry. The Details of the project and major timelines are as shown below.

 

CRPF Housing Project

 

Details For Components:

Sandwich Walls

185mm sandwich panels here been used for this project with 2” XPS Insulation between the interior and exterior Whyte’s.

Insulated sandwich wall panels can be strictly architectural, strictly structural, or a combination of both. The difference between typical panels and insulated sandwich wall panels is that the latter are cast with rigid insulation “sandwiched” between two layers, or wythes, of concrete. The insulation thickness can vary to create the desired thermal insulating property (“R” value) for the wall.

 

 

The structural behavior is either:

Composite in which the wythes are connected using ties through the insulation that fully transfer loads. The structural performance is then based on the full thickness of the panel; or

Non-Composite in which the wythes are connected using ties through the insulation, which limits performance to the individual capacities of each wythe.

 

 

Whether the panel is composite or non-composite depends on the configuration and material used for the ties. Insulated sandwich wall panels can be designed to be load bearing and support floor and roof components. They make an ideal structural element for this purpose, typically by casting a thicker interior wythe to provide the necessary support. They can also be non-load bearing to complete a façade.

 

 

Finishes: As with typical wall panels, the panels are cast in a flat orientation, so the form side is typically the side that will be exposed to view in the final construction. This face can be made with virtually any type of finish. wall panels allow for great aesthetic details and extensions such as cornices, due to the manufacturing process. The back face is typically towelled smooth, but is not left exposed.

 

 

Beams

Various shapes and size of the beam are used in this project. Balconies & utility area are formed with beams & columns. A beam is also used as an Architectural element in every block.

Beams are typically considered structural components and are made in one of three key shapes:

Rectangular

Inverted Tee Beams

L Beams

Beams are horizontal components that support deck members like double tees, hollow-core, and solid slabs, and sometimes other beams. They can be reinforced with either pre stressing strand or conventional reinforcing bars. This will depend on the spans, loading conditions, and the producer’s preferred production methods.

 

 

Finishes: Since beams are cast upright, the bottom, sides, and ledges are cast against a form and will typically be provided with an “as cast” finish that results in a smooth, hard finish. The top is troweled by the finishing crew and can be smooth, roughened to simulate the finish of supported double tees (as in a parking structure), or intentionally roughened to create a bond with cast-in-place concrete that may be poured on top of it.

 

 

Columns

L – Shaped columns have been used in the balconies in each houses, since this projects was designed using the shear wall systems, use of columns is only limited to gravity loads and not the lateral loads.

Columns are typically used to support beams precast concrete structural systems of all types. They typically are designed as multilevel components ranging from a single story to six levels or more. Sizes and shapes can vary to satisfy both architectural and structural requirements. Finishes: Typically, three sides will have an “as cast” finish that results in a smooth, hard finish. The fourth side is troweled by the finishing crew to match the other sides as closely as possible.

 

 

Slabs

100mm precast slab with 60mm CIS structural screed was used as floor and roof slabs. The top surface is intentionally roughened as well as lattice-styled reinforcement is projected out for bonding with the screed. All electrical conduits were placed before the screeding. The screeding also helped connect the vertical elements with the diapraghm.

 

 

Watertanks

Single casting of 4000 liters water tank was one of the most important element in the design. Special moulds were manufactured for this; concrete was cast in controlled environment and continuous curing for 7 days was done. These units were transported in flat bed trailers and these were launched in place using a 135 ton crane and grouted immediately.

 

 

Staircase

Staircase with multiple risers and landings on both sides were casted on a single element and erected. Typically profile of 150mm Riser with 300mm Tread was used in this project. The finishes were smooth at the Treads and Risers and trowel at the bottom of waist slab.

 

 

Advantages of precast concrete units:-

Better quality control of the finished product saving of space on site as formwork storage space and- Saving of space on site as formwork storage space and fabrication space is not required.

 

For further details:
Teemage Precast In
S.F.No.6/35, College Road, 1st Cross street,
Tirupur – 641602.
Tel No: +91 421 2200488, 2240488
Mobile No: +91 82200 51777,
+91 9003655155, +91 77080 73369,
+91 82204 55555
E- mail : sales@teemageprecast.in
Web: www.teemageprecast.in

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