From the Desk of Executive Director

 

It is indeed an honour & privilege for me to assume the charge of Executive Director, BMTPC. 

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  New Initiatives : Emerging Technologies
 
POSTPONED - Indo-Norwegian Training Programme on Seismic Design of Multi-storey Buildings, October 12-14, 2017 Opportunity to Share Your Sustainable Building Materials/Technologies on Knowledge Portal NEW... Mobile Application on Earthquake Hazard Map of India
 

RANDOM RUBBLE STONE FOUNDATION IN MUD MORTAR
 
System Components
Initial Cost Structure
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
·    Local Economy component = 51 %
·   Foundation in RRM in mud mortar of 450 x 450mm over 600 x 600 footing in granite stone
 
DESIGN EXAMPLE : Foundation for a single storey Building
 
Maximum width required = 2 x width of the wall + 0. 3m
(Assuming 23cm thick brick wall)= 2 x 0.23 + 0.3 m. = 0.76m.
 
Minimum depth required  = 
Assuming P
Safe permissible pressure on base) = 125 KN/sqm
W (weight of soil) = 18 KN/sqm
Angle of repose of the soil = 30 = 125/18x0.111= 0.77 m.
Assuming bearing capacity of soil = 200 Km/sqm
Width required  = 125/200 = 0.625m
Thus provide a foundation width = 76 cm and depth 77 cm
 
Critical Factors
 
1. Quality of soil
2. Width and stepping of foundation
3. Providing through stones
4. Protection from water
5. Inter
locking at corners
 
Tools Used
 
1. Trowels
2. Plumb bob 
3. Thread
4. Pans
5. Shovel
6. Pick axes
7. Baskets
 
DO’S
 
DON’T’S
1. Soil should have medium plasticity
2. Thorough stones should be provided
3. Natural bed of stone should be always       
    Perpendicular to the loading.
1.    Sand and clay should be used for mortar
2.    Rounded stone should not be used for            
Masonary
3.    Masonry should not be allowed to dry out quickly
4.    Bonding of the wall should not be filled with small stone pieces
 
 
 
 
 
 

 
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