SCEBs - University of Colorado Boulder

Figure 4.9: Deterioration of an „Amsden 25%‟ SCEB after five saturations
4.1.4. Discussion of Test Results
Based on the aforementioned results, all three soil samples (Amsden, DMC 01,
and DMC 02), were found to be suitable for the production of SCEBs. All of the SCEB‟s
UCS results were satisfactory for both strength and durability when compared to the New
Mexico Building Materials Code recommended value of 300 psi. The results indicate
that the Amsden soil performed the best despite containing a slightly lower percentage of
fine grained material. It is likely that the Amsden soil contains less silt relative to the
other samples. After five saturations, however, UCS values for Amsden 35%, DMC 01
40% and DMC 02 40% differed by less than 100 psi, thus making any of these soil
mixtures suitable. Each soil mixture exhibited a higher UCS when a larger amount of
fine grained material was used in the mix; therefore, it is recommended that at least 40%
of the dry soil weight be comprised of the Amsden, DMC 01, or DMC 02 soils.
It is recommended that the following soil mix ratios (by volume) be used:
Amsden Formation:
Upper Limit: 1 part cement, 2 parts water, 10 parts clay, 10 parts sand
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