SCEBs - University of Colorado Boulder
SCEBs - University of Colorado Boulder
SCEBs - University of Colorado Boulder
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achieved an average UCS value <strong>of</strong> 1,278 psi and an average MOR value <strong>of</strong> 153 psi. The<br />
standard deviation for UCS and MOR was 90 psi and 26 psi, respectively.<br />
Soil<br />
Sample ID<br />
# <strong>of</strong> Blocks<br />
Produced<br />
Soil Mix Ratio 1:3<br />
Average Dry<br />
Density<br />
[pcf]<br />
Average<br />
UCS<br />
[psi]<br />
Average E<br />
[ksi]<br />
Average<br />
MOR<br />
[psi]<br />
Soil #11 22 128.0 1,140.7 48.0 134.8<br />
Soil #15 18 133.0 1,278.0 51.2 153.4<br />
Table 4.16: Soil Mix 1:3 Material Test Results<br />
Soil #11 achieved an average UCS value <strong>of</strong> 647 psi and an average MOR value <strong>of</strong><br />
74 psi. Based on the number <strong>of</strong> blocks tested, the standard deviation for UCS and MOR<br />
was 49 psi and 12 psi, respectively. Soil #15 achieved an average UCS value <strong>of</strong> 688 psi<br />
and an average MOR value <strong>of</strong> 67 psi. The standard deviation for UCS and MOR was 108<br />
psi and 30 psi, respectively.<br />
Soil<br />
Sample ID<br />
# <strong>of</strong> Blocks<br />
Produced<br />
Soil Mix Ratio 1:1<br />
Average Dry<br />
Density<br />
[pcf]<br />
Average<br />
UCS<br />
[psi]<br />
Average E<br />
[ksi]<br />
Average<br />
MOR<br />
[psi]<br />
Soil #11 19 123.6 647.0 31.5 73.6<br />
Soil #15 19 125.2 688.3 32.4 67.0<br />
Table 4.17: Soil Mix 1:1 Material Test Results<br />
4.2.4. Discussion <strong>of</strong> Test Results<br />
Varying the soil mix ratio affects the material properties <strong>of</strong> the SCEB blocks<br />
produced. This behavior is illustrated using both full-scale and model-sized blocks. The<br />
large blocks produced from a 1:3 soil mix ratio showed no adverse effects, such as<br />
cracking, during the curing phase and achieved satisfactory dry density, UCS, and MOR<br />
values. The large blocks produced from a 1:1 soil mix ratio showed no signs <strong>of</strong> cracking<br />
and achieved a satisfactory dry density, but suffered significant reductions in UCS and<br />
MOR, making this specific soil mixture not optimal.<br />
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