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5.2. Scale Effects The effect of the block aspect ratio on its unconfined compressive strength must be accounted for. The aspect ratio is defined as the height of the specimen divided by its minimum width. An aspect ratio of 2.0 (2H : 1W) or greater is typically accepted as standard for representing the strength of a material (ASTM C39, C42, and C1314). This analysis evaluates UCS and E values of various SCEB prisms to investigate aspect ratio effects. These effects are important for understanding how laboratory UCS results of single blocks compare to full-scale wall sections loaded in the field. 5.2.1. Crow Tribe Large Blocks Prisms ranging from 1 to 4 or 5 stacked blocks provided by the Crow Tribe (aspect ratio ranging from 0.5 to 2.6) were tested to develop an understanding of the effect of the aspect ratio on the unconfined compressive strength and Young‟s Modulus (E) (see Figures 5.13-5.17). The blocks were produced using a 4:1, clayey soil to sand ratio, soil mixture including ~4% Portland cement. 66
Figure 5.13: Aspect Ratio Test, Five block prism Figure 5.14: Aspect Ratio Test, Four Block Prism 67
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A Proposed Best Practice Method of
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Krosnowski, Adam Davis (M.S., Depar
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Table of Contents 1. Introduction .
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Table of Figures Figure 2.1: World
Page 9 and 10:
1. Introduction The demand for sust
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soils must be defined to standardiz
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move more towards sustainable “gr
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2.1. SCEB Technology Advantages The
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latent heat of vaporization. The ef
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sedimentation (jar) test, ball drop
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opportunities for water to alter th
Page 23 and 24: 3.2. Testing Methodology Flow Chart
Page 25 and 26: transported sealed in airtight five
Page 27 and 28: Figure 3.2: Gilson Testing Screen M
Page 29 and 30: infer the clay content. Figure 3.7
Page 31 and 32: potential for minimizing costs. Det
Page 33 and 34: calculate bulk unit weights of the
Page 35 and 36: 3.9. Modulus of Rupture: Three-Poin
Page 37 and 38: Figure 3.16: SCEBs soaking in water
Page 39 and 40: samples from the Dead Man‟s Curve
Page 41 and 42: previous experience, visual inspect
Page 43 and 44: one week intervals during the initi
Page 45 and 46: UCS [psi] UCS [psi] 1000 800 600 40
Page 47 and 48: UCS [psi] UCS [psi] 1000 800 600 40
Page 49 and 50: Lower Limit: 1 part cement, 1 part
Page 51 and 52: Percent Passing Soil #15: Hydromete
Page 53 and 54: the sample and not the entire soil
Page 55 and 56: Large blocks were produced from two
Page 57 and 58: The large blocks produced were kept
Page 59 and 60: decreased by 23-25% over the course
Page 61 and 62: Figure 4.23: UMU Mini-Blocks; Five
Page 63 and 64: Average UCS [psi] 2000 1600 1200 UM
Page 65 and 66: Clayey soil is often mined and tran
Page 67 and 68: Figure 5.1: Full Block in 3-Point B
Page 69 and 70: nature will increase the level of c
Page 71 and 72: this point of testing. The testing
Page 73: Average Large Block UCS [psi] 800 7
Page 77 and 78: Figure 5.17: Aspect Ratio Test, One
Page 79 and 80: E [ksi] 35 30 25 20 15 10 y = 23.85
Page 81 and 82: The equation of the trend-line was
Page 83 and 84: of optimizing a soil mix design. Of
Page 85 and 86: plasticity. They also do not offer
Page 87 and 88: the SCEB strongly influence its com
Page 89 and 90: specimens will be tested for compre
Page 91 and 92: P f Pf [ psi] 2 A force at fail
Page 93 and 94: Coduto, D. P. 1999. Geotechnical En
Page 96 and 97: 8.2. Crow Tribe Case Study Test Dat
Page 98 and 99: 8.2.2. Schmidt Hammer Test Data R V
Page 100 and 101: UMU Sample #15 1:3 (6 x 12 x 3 5/8)
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