STATES

ASSAM, MANIPUR,  meghalaya, nagaland, tripura, arunachal Pradesh, mizoram and sikkim

EXISTING CONDITIONS

AND

CONSTRUCTION

PRACTICES

The zone is basically hilly region with heavy rainfall and falls under seismic zone V. There is abundance of stones but at number of pockets, soil for making bricks is also available. Forests are thick having bamboo and other timber trees in plenty. The houses are built with soil blocks and 'Ekra' walling. The roofs are generally sloping, either of thatch or CGI sheets having rafters and purlins make of timber f bamboo.

INNOVATION OF

MATERIALS,

COMPONENTS

AND

TECHNOLOGIES

·        Instead of mud blocks for walling, stabilized clay blocks with cement - lime - bitumen can be used. Ferrocement walls using split bamboo reinforcement and stabilized soil – cement mortar

·        In place of RR masonry solid concrete blocks of 30x20x15 cm and 30x15x15 cm with lean concrete mixes of 1 :4:4:8 (cement: coarse sand: 12mm graded aggregate: 40mm aggregate) shall be produced with individual or battery mould having vibration by a plate vibrator or using block making machine. The blocks for the partition walls shall be 30x10x10cm. The hollow concretes blocks shall be 40x20x20 cm and 40x20x10 cm.

Foundation

·        For the stilts, precast RCC posts shall be used, instead of timber posts. The joists shall also be of RCC either in-situ or precast.

·        Burnt clay bricks in cm1:6

Wailing

·        RCC bands and vertical reinforcement as per IS code, shall be provided to protect against the seismic forces.

·        Burnt brick walls laid in cement mortar 1:6 with RCC bands shall be provided where bricks are available

·        Solid concrete blocks of 30x20x15cm or 30x15x15cm or hollow concrete blocks of 40x20x20 mm laid in cement sand 1:6 mortar with RCC bands can be provided for load bearing walls. Partition walls can bewith blocks of 30x10x10 mm.

Lintels

·        75 mm thick precast RCC lintels, with or without sunshades, can be provided in brick or block masonry walls.

·        RC plinth bands, lintel bands and roof band using cement concrete M20 concrete.

Doors and

Windows

·        Braced and battened doors of secondary species timber with pivots at top and bottom can be provided with or without any frame.

·        RCC frames and shutter for doors and windows can be provided.

·        Bamboo mat shutters for doors and windows can be provided.

Roofing

·        Precast RCC joist with prefab brick panels/RC plank / funicular shell / Precast Jack-arch Panel can be provided.

·        Micro concrete tiles over treated bamboo/timber purlins of ferrocment purlins.

·        CGI sheets with false ceiling

·        BMC roofing sheets on Bamboo or steel trusses

Flooring

·        PCC 1 :2:4 flooring 25 mm thick over a base course of lean concrete (1 :5:1 0) 75 mm thick

Sanitation

·        Single stack system of plumbing.

·        G.!. I PVC pipes for water supply.

·        CII PVC soil I waste pipes