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From page 20... ... 20 Laboratory Investigation RAP and RCP materials are generally used as an unbound structural layer. Thus, most of the laboratory tests were conducted on samples meeting a target gradation similar to a DGBL; a few tests were conducted on samples prepared to a gradation similar to an OGDL. Read the entire page →
From page 21... ... 21 Table 4.1. Percent passing for laboratory testing. Read the entire page →
From page 22... ... 22 strain percent versus number of load cycles. Load increments, applied axial stress for each load cycle, and corresponding stress ratios are shown in Table 4.4. Read the entire page →
From page 23... ... 23 Figure 4.4. Gradation results of virgin aggregate DGBL-blended sample. Read the entire page →
From page 24... ... 24 Table 4.3. Failure deviator stress. Read the entire page →
From page 25... ... 25 0 20 40 60 80 100 120 140 RAP-GV-LA RAP-GR-CO RAP-LS-MS RAP-GR-CO 50/50 R RAP-GR-CO 50/50 Virgin (OGDL) RCP-GV-LA RCP-LS-IL RCP-GR-SC 50/50 R RCP-LS-IL 50/50 Virgin (DGBL#2) Read the entire page →
From page 26... ... 26 materials, the 50-percent blend of RAP-GR-CO with virgin aggregate was more resistant to permanent deformation in both the wet and dry repeated load triaxial tests compared to as-received RAP-GR-CO material. RCP-GV-LA exhibited the highest permanent deformation resistance in the dry tests of all RCP materials. Read the entire page →
From page 27... ... 27 Load increment for strain achieved and stress ratio (SR) Material Sample Identification 1% 1 / 3 3% 7% 10% Dry Test #1 5 6.0 8 10.0 4.8% strain at cycle #10,000 Dry Test #2 5 6.0 10 12.7 3.2% strain at cycle #10,000 Dry Test #3 6 7.3 10 12.7 3.0% strain at cycle #10,000 Saturated Test #1 4 4.7 7 8.7 9 11.3 10 12.7 Saturated Test #2 4 4.7 7 8.7 10 12.7 10 12.7 Virgin DGBL Blend#1 Saturated Test #3 4 4.7 7 8.7 9 11.3 9 11.3 Dry Test #1 5 6.0 8 10.0 10 12.7 10 12.7 Dry Test #2 5 6.0 8 10.0 9 11.3 10 12.7 Dry Test #3 5 6.0 8 10.0 9 11.3 10 12.7 Saturated Test #1 5 6.0 7 8.7 8 10.0 8 10.0 Saturated Test #2 5 6.0 6 7.3 8 10.0 8 10.0 Virgin DGBL Blend#2 Saturated Test #3 5 6.0 7 8.7 8 10.0 8 10.0 Dry Test #1 6 7.3 8 10.0 9 11.3 9 11.3 Dry Test #2 5 6.0 8 10.0 9 11.3 9 11.3 Virgin OGDL Blen d Dry Test #3 5 6.0 8 10.0 9 11.3 10 12.7 Dry Test #1 3 3.3 5 6.0 7 8.7 9 11.3 Dry Test #2 3 3.3 5 6.0 7 8.7 9 11.3 Dry Test #3 3 3.3 5 6.0 7 8.7 8 10.0 RAP-LS- MS 100 o F Test 3 3.3 5 6.0 7 8.7 9 11.3 Dry Test #1 3 3.3 5 6.0 7 8.7 8 10.0 Dry Test #2 3 3.3 5 6.0 7 8.7 8 10.0 RAP-GV- LA Dry Test #3 4 4.7 5 6.0 7 8.7 8 10.0 Dry Test #1 3 3.3 5 6.0 8 10.0 10 12.7 Dry Test #2 3 3.3 5 6.0 8 10.0 10 12.7 Dry Test #3 3 3.3 5 6.0 8 10.0 9 11.3 100 o F Test 2 2.0 6 7.3 8 10.0 10 12.7 Saturated Test #1 3 3.3 5 6.0 8 10.0 10 12.7 Saturated Test #2 3 3.3 5 6.0 8 10.0 9 11.3 RAP-GR-CO Saturated Test #3 3 3.3 6 7.3 9 11.3 10 12.7 Dry Test #1 5 6.0 7 8.7 5.4% strain at cycle #8,800 Dry Test #2 5 6.0 8 10.0 6.9% strain at cycle #10,000 Dry Test #3 5 6.0 7 8.7 9 11.3 10 12.7 Saturated Test #1 5 6.0 8 10.0 9 11.3 10 12.7 Saturated Test #2 6 7.3 8 10.0 10 12.7 10 12.7 RCP-LS-IL Saturated Test #3 6 7.3 8 10.0 9 11.3 10 12.7 Dry Test #1 8 10.0 2.8% strain, cycle #9,001, at > load cell capacity Dry Test #2 8 10.0 10 12.7 4.5% strain at cycle #10,000 Dry Test #3 6 7.3 8 10.0 10 12.7 10 12.7 Saturated Test #1 5 6.0 6 7.3 7 8.7 8 10.0 Saturated Test #2 5 6.0 6 7.3 8 10.0 8 10.0 RCP-GV-LA Saturated Test #3 5 6.0 6 7.3 8 10.0 8 10.0 σ σ 1 / 3 σ σ 1 / 3 σ σ 1 / 3 σ σ Dry Test #1 5 6.0 7 8.7 9 11.3 9 11.3 Dry Test #2 5 6.0 7 8.7 9 11.3 9 11.3 Dry Test #3 5 6.0 7 8.7 9 11.3 10 12.7 Saturated Test #1 5 6.0 7 8.7 8 10.0 9 11.3 Saturated Test #2 5 6.0 6 7.3 8 10.0 9 11.3 RCP-GRSC Saturated Test #3 5 6.0 7 8.7 8 10.0 9 11.3 Dry Test #1 4 4.7 6 7.3 8 10.0 9 11.3 Dry Test #2 4 4.7 6 7.3 8 10.0 9 11.3 Dry Test #3 4 4.7 6 7.3 8 10.0 9 11.3 50/50 RAPLS-MS 100oF Test 4 4.7 6 7.3 8 10.0 9 11.3 Dry Test #1 4 4.7 6 7.3 8 10.0 8 10.0 Dry Test #2 4 4.7 6 7.3 8 10.0 9 11.3 50/50 RAP-GV-LA Dry Test #3 4 4.7 6 7.3 8 10.0 8 10.0 Table 4.5. Read the entire page →
From page 28... ... 28 as-received condition increased slightly under wet conditions. However, the stiffness of the 50-percent blend of RCPGV-LA, virgin DGBL#1, and RCP-GV-LA was reduced by 15, 20, and 33 percent when tested in wet conditions, respectively, suggesting that these materials may be susceptible to wet conditions. Read the entire page →
From page 29... ... 29 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 RAP-LS-MS RAP-GR-CO RAP-GR-CO 100%OGDL reblend RAP-GV-LA RAP-GR-CO 50/50 OGDL reblend 50/50 RAP-LS-MS 50/50 RAP-GV-LA 50/50 RAP-GR-CO Virgin DGBL Blend#2 Virgin DGBL Blend#1 Virgin OGDL Blend Stress Ratio 10 percent 7 percent 3 percent 1 percent Strain 0.00 2.00 4.00 6.00 8.00 10.00 14.0012.00 50/50 RCP-GR-SC 50/50 RCP-LS-IL RCP-GR-SC 100%OGDL reblend Virgin DGBL Blend#2 RCP-LS-IL RCP-GR-SC 50/50 RCP-GV-LA RCP-GR-SC 50/50 OGDL reblend Virgin DGBL Blend#1 Virgin OGDL Blend RCP-GV-LA Stress Ratio 10 percent 7 percent 3 percent 1 percent Strain Figure 4.9. Stress ratios for dry triaxial tests on RAP samples. Read the entire page →
From page 30... ... 30 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 RAP-GR-CO 50/50 RAP-GR-CO Virgin DGBL Blend#2 Virgin DGBL Blend#1 Stress Ratio 10 percent - wet 7 percent - wet 3 percent - wet 1 percent - wet 10 percent - dry 7 percent - dry 3 percent - dry 1 percent - dry Strain 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 Virgin DGBL Blend#2 Virgin DGBL Blend#1 RCP-GV-LA 50/50 RCP-GV-LA RCP-GR-SC RCP-LS-IL 50/50 RCP-LS-IL 50/50 RCP-GR-SC Stress Ratio 10 percent - wet 7 percent - wet 3 percent - wet 1 percent - wet 10 percent - dry 7 percent - dry 3 percent - dry 1 percent - dry Strain Figure 4.11. Stress ratios for dry and wet triaxial tests on RAP and virgin samples. Read the entire page →
From page 31... ... 31 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Virgin DGBL Blend#1 RCP-GV-LA RCP-LS-IL Virgin DGBL Blend#2 50/50 RCP-LS-IL RAP-GR-CO 50/50 RCP-GR-SC Virgin OGDL Blend RCP-GR-SC 50/50 RCP-GV-LA 50/50 RAP-LS-MS 50/50 RAP-GR-CO RCP-GR-SC 50/50 OGDL reblend RAP-GR-CO 100%OGDL reblend RCP-GR-SC 100%OGDL reblend RAP-LS-MS RAP-GR-CO 50/50 OGDL reblend 50/50 RAP-GV-LA RAP-GV-LA Number of load repetitions for 10 percent permanent strain Figure 4.13. Number of load repetitions at 10-percent permanent strain (dry tests) Read the entire page →
From page 32... ... 32 Table 4.6. Resilient modulus data from repeated load triaxial testing. Read the entire page →
From page 33... ... 33 Frost Susceptibility Tube suction tests were conducted to characterize the moisture susceptibility properties of RAP, RCP, and virgin aggregate materials. The test measures the moisture affinity of a granular material by subjecting the test specimens to a 10-day capillary soak in a water bath, as described in Texas Test Method 144 E (12) Read the entire page →
From page 34... ... 34 Figure 4.17. Apparatus used to make surface dielectric measurements. Read the entire page →

From page 20...

... 20 Laboratory Investigation RAP and RCP materials are generally used as an unbound structural layer. Thus, most of the laboratory tests were conducted on samples meeting a target gradation similar to a DGBL; a few tests were conducted on samples prepared to a gradation similar to an OGDL.