SCEBs - University of Colorado Boulder
SCEBs - University of Colorado Boulder
SCEBs - University of Colorado Boulder
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Average Large Block UCS<br />
[psi]<br />
800<br />
750<br />
700<br />
650<br />
600<br />
550<br />
500<br />
Figure 5.12: UMU 1:1 Soil Mix; Large Block vs Cylinder UCS<br />
Performing a linear regression analysis resulted in a relatively high R 2 value <strong>of</strong><br />
0.85. However, due to the limited number <strong>of</strong> tests performed, the results from the<br />
regression analysis are highly uncertain at this phase <strong>of</strong> testing. The author proposes that<br />
continuing the testing described in this section, using an adopted standard procedure for<br />
producing and testing stabilized soil cylinders, can lead to a strong correlation between<br />
cylinder and block strength properties.<br />
UMU 1:1 Soil Mix: Large Block vs Cylinder Strength<br />
y = 0.7029x + 564.63<br />
R 2 = 0.8467<br />
0 100 200 300 400<br />
Cylinder UCS [psi]<br />
The average force at failure <strong>of</strong> the four tests performed was 1,300 pounds. The<br />
shop press described in Section 5.3.1 is easily capable <strong>of</strong> supplying the necessary failure<br />
load making the cylinder test an excellent candidate for on-site quality control evaluation.<br />
The ability to test soil cylinders at a low cost using a simple shop press load frame and<br />
confidently infer the actual compressive strength <strong>of</strong> the material has important<br />
implications to SCEB material evaluation<br />
Data Points<br />
Linear (Data Points)<br />
65