Auroville_Satprem_pt1.pdf

1. B. DATA ON CSEB
TECHNICAL SPECIFICATIONS (5% CEMENT STABILISED BLOCKS)
Dry compressive crushing strength σc (At 28 : 5 to 7 Mpa
days)
Wet compressive crushing strength σc (At 28 : 3 to 4 Mpa (after 24 h. immersion)
days)
Dry bending crushing strength σb (At 28 days) : 0.5 to 1 Mpa
Dry shear crushing strength (At 28 days) : 0.4 to 0.6 Mpa
Water absorption by weight (At 28 days) : 8 to 10 % (after 24 h. immersion)
Apparent bulk density (dry) : 1,900 to 2,000 kg/m 3
Coefficient of conductivity : 0.81 to 0.93 W/m°C
Time lag : 10 – 12 hours for 40 cm thick
Embodied energy per m 3 of finished masonry : 1,112.36MJ / m 3
(This value has to be compared with country fired bricks = 4,501.25 MJ / m 3
Carbon emission (CO2) per m3 of finished : 100.11 Kg / m
masonry
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(This value has to be compared with country fired bricks = 441.12 Kg / m3 Notes:
� Compressive strength values are for Auroville soil
(red sandy soil of lateritic origin with iron oxide), compressed with the Auram press 3000
� These mechanical characteristics are influenced by:
- The soil quality, the compression ratio and the force applied by the press
- The quality of manufacturing and especially curing
- The quality and percentage of stabilizer
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