This document discusses new materials and technologies used in the construction of the National Institute of Securities Markets (NISM) in Mumbai, India. It describes the location of NISM and its facilities, then provides details on the use of glass fibre reinforced concrete panels, post-tensioned slabs, autoclaved aerated concrete blocks, acoustic ceilings and panelling, furniture, stamped concrete, expanded polystyrene foam blocks, floorings, glass, acoustic panels, aluminium louvers, and service trenches in the construction of NISM.

1. NEW MATERIALS AND TECHNOLOGIES
USED IN NISM, MUMBAI
DR K M SONI
CHIEF ENGINEER, CPWD, MUMBAI

2. NISM PATALGANGA, RASAYANI, MUMBAI
 LOCATION: 75 KMS FROM MUMBAI AIRPORT
 AREA OF PLOT: 70 ACRES
 CONSULTANT: HITEN SETHI & ASSOCIATES
 SANCTIONED COST: 315 CRORES
 PROJECT MANAGEMENT AGENCY: CPWD

4. NISM, PATALGANGA NEAR MUMBAI

5. FACILITIES
• ORIENTATION BLOCK
• ACADEMIC BLOCKS – 4
• LIBRARY
• OPEN AIR AMPHITHEATRE
• DINING HALL
• AUDITORIUM
• RECREATION BLOCK
• HOSTELS – 4
• RESIDENTIAL BLOCK
• UTILITY BLOCK
• DIRECTOR’S BUNGALOW

9. GLASS FIBRE REINFORCED CONCRETE PANELS
• GFRC panels have been used in the façade of orientation block. As may
be seen, external surface is curvilinear and thus a material for cladding
was searched which may fit exactly the architectural design envisaged.
Simultaneously, it was the requirement that the material is weather
proof and durable. Due to suitability of GFRC panels, they were adopted
as they could be manufactured in any shape.
• Hot dipped galvanized M.S framework and brackets were used for
supporting the GFRC panels. Minimum thickness of GFRC panels was
adopted as 15 mm whereas thicknesses at return flange/embedded
location was kept as 50 mm. The panels were strengthened by providing
sufficient nos. of horizontal and vertical stiffeners of stainless steel grade
316 of required shape and size as per design requirement.
• The panels consisted of glass fibers of @ 3.5 to 5% by weight, silica,
white cement and admixtures. Water repellant coating was applied on
the panels by dipping panels in required solution to withstand
atmospheric conditions.

11. POST TENSIONED SLAB
Post tensioned (PT) slabs were used in some portions of
academic blocks. This provided additional headroom for
the services. Additionally such construction has advantages
of higher clear spans, thinner slabs, lighter structure,
reduced cracking and deflections, reduction in storey
height resulting into more storeys in same height, rapid,
quality and skilled construction, and higher loading
performance. It has to be ensured that the slab is not
drilled during lifetime of the structure as it may damage
pre-stressing and lead to failure.
• After placement of steel and tendons, concreting is first
done except at the end from where stressing is done,
excess length cut and grouting carried out around the
tendons.

14. AAC BLOCKS
• Factory made AAC blocks have been used in
all masonry work. The blocks have low
density (about 550 kg per cum) and are eco-
friendly.
• Are light weight
• Have good acoustic and insulation properties.
• The blocks reduce the weight of structure
and also produce quality construction.

16. FALSE CEILING AND PANELLING

17. ORIENTATION BLOCK

22. ACADEMIC CUM ADMINISTRATIVE BLOCK

27. ACCOUSTIC FALSE CEILING
• Anutone Salon Slat plus False ceiling

39. NAMASTE FURNITURE

44. STAMPED CONCRETE

45. • Stamped concrete is concrete that is patterned or textured
or embossed to resemble a required pattern may be brick,
stone, slate, tile or wood. It is used for footpaths, walkways,
driveways etc.
• In laying stamped concrete, base was prepared with RCC
though if sub grade is found suitable, it can be provided with
plain concrete also. Over the concrete layer finished to the
grade, colour hardener is added of the required shade in the
fresh concrete as specified, troweled and floated. Approved
release agent is then applied evenly to the troweled surface
before stamping.
• While the concrete is still in plastic stage, required stamping
tools are applied to the surface and curing carried out as
specified.

52. EXPANDED POLYSTYRENE GEOFOAMBLOCKS
• Such 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.
• Despite its light weight, the material’s compressive resistance ranges
from about 15,178 to 128,223 Pa at a one percent strain. 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.
• When used in the walling, particularly in partition walls similar
procedure can be adopted except that wire mesh should be provided on
both sides of the wall.

57. FLOORINGS

66. GLASS

79. ACOUSTIC PANELS

82. ALUMINIUMLOUVERS

91. Service trenches
• Not a very new concept
• Being adopted in NISM