Sample | Strength at 28 days (MPa) | Silt and clay content (%) | Organic impurities (photometric ohms) | Workability | Source of sand (as per suppliers) | Particle texture and shape | |
1 | ML4 | 21.552 | 4.8 | 0.106 | 56 mm | Kajiado | Smooth & fine, Irregular |
2 | KB2 | 24.403 | 8.2 | 0.202 | 79 mm | Kajiado | Rough & fine, Irregular |
3 | KT1 | 24.537 | 13.5 | 0.168 | 93 mm | Machakos | Rough, Irregular |
4 | NR1 | 24.937 | 42.8 | 0.594 | 3 mm | Kangundo | Rough, Smooth |
5 | KW1 | 24.955 | 8.8 | 0.238 | 4 mm | Machakos | Rough & fine, Irregular |