Expanded Polystyrene (EPS) Geofoam Blocks - Technology
Project Name : NATIONAL INSTITUTE OF SECURITIES MARKETS, PATALGANGA, RASAYANI, DISTT. RAIGARH (ABOUT 75 KM FROM MUMBAI)
National Institute of Securities Markets (NISM) is an educational initiative of SEBI (Securities Exchange Board of India) India. In securities markets, NISM is already recognised all over the world. The institute entrusted the work of project management consultancy to CPWD. M/s Hiten Sethi & Associates were appointed as consultants of the project. The institute was allotted 70 acres land by MIDC (Maharashtra Industrial Development Corporation) at Patalganga, Rasayani in Raigarh district located at about 75 kms from Mumbai international airport on Mumbai-Pune expressway and is on right side when one travels from Mumbai to Pune. Though almost adjoining to the expressway, there is no direct entry to the campus from the expressway due to government regulations hence one has to enter the campus from the village side. The land was in three plots, measuring 53 acres, 10 acres and 7 acres. The institutional buildings and hostels were designed in the plot of 53 acres while residential buildings in 10 acres plot. Plot of 7 acres area has been reserved for future expansion.
31500 (Total project cost) Lakh
Project Budget
06 Sep 2013
Start Date
24 Dec 2016
Completion Date
RAIGARH
Location
Project Team / Contact Us
| S.No. | Name(Mr/Mrs) | Designation | Office Address | Office Number | Mobile Number | Email ID |
|---|---|---|---|---|---|---|
| 1 | Dr K M Soni | CE | WZ-I, Mumbai | 02222059123 | 7588517958 | dr.kmsoni@gmail.com |
MATERIAL
EPS geofoam blocks have been used in lecture halls on first and second floors of the academic blocks for construction of steps. The blocks are very light and thus help in weight reduction. Due to light weight, their handling and placing is also easy. In the present case density of the blocks used was 21.6 kg per cum. Moreover, despite their light weight, compressive resistance ranges from about 15,178 to 128,223 Pa at a one percent strain.
Physical Properties
As per ASTM D6817, foam control is prescribed as EPS12, EPS15, EPS19, EPS22, EPS29, EPS39 and EPS46 for Geofoam blocks.
EPS Geofoam blocks are available in various sizes, generally in 1.2mx1.2m and 1.2mx2.4m but can be manufactured even in large sizes. Thickness of the blocks can be manufactured up to 36 inches. Standard blocks come as rectangles but can be custom cut in the factory to meet various job requirements, including sloped or curved pieces. Additionally, EPS Geofoam blocks are easy to cut in the field, as needed, using saws or a hot-wire cutting tool to install various services or as per the requirements.
Typical density of EPS geofoam may vary minimum from 11 to 46 kg per cum as per ASTM C303 for different types of foams hence the blocks are very light and thus suitable for areas where weight reduction is required. Due to light weight, their handling and placing is also easy.
The compressive resistance of EPS Geofoam blocks ranges from about 15 kPa to 18.6 kPa at 1% deformation as per ASTM D1621 for different types of foams. As long as combined dead/live loads do not exceed one percent strain, EPS Geofoam blocks will not creep or experience plastic yield.
Minimum flexural strength of EPS Geofoam blocks vary from 69 kPa to 517 kPa as per ASTM C203.
Properly selected and installed EPS Geofoam blocks are durable. They do not get decomposed and last for long. It is advisable to cover the blocks and not to keep exposed to sun to avoid degradation. In the steps, they are restrained from displacements by providing GI wire mesh/GI wire fabric which also acts as reinforcement for the concrete being overlaid.
EPS is combustible and as such also, it is important to cover it with non-combustible material like cement concrete, RCC, stone or tiles. In case, it is required, fire retardant paint should be applied over such blocks.
Blocks are light in weight and high compressive strength.
Implementation Strategy
| S.No. | Description | Images | |||||
|---|---|---|---|---|---|---|---|
| 1 | When used in the steps, the thickness of the blocks should be as per the requirements of the riser and laid accordingly so that riser of the step is sum of thickness of the block, wire mess and screed concrete including thickness of flooring if any or carpet as proposed. Over the blocks, wire mesh is used to tie them, to keep in position and also for better bonding with the concrete being laid over the blocks. Small thickness of concrete is used for protection and flooring to be laid as per the architectural requirements. EPS geofoam blocks can be successfully used in stairs, seating of class rooms, lecture halls, auditoriums, theatres and stadia and rooftop pools or plaza decks with pavers or cast-in-place slabs. |
|
Lessons Learnt / Take Aways
| S.No. | Description | Images | ||
|---|---|---|---|---|
| 1 |
EPS polystyrene blocks are very light, durable and of adequate strength hence highly suitable for construction of steps in lecture halls, auditoriums, and the structures requiring seating in existing buildings as well as in new buildings. |
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