Table 7 (cont'd). Compression testing of RPC specimens.
c. Results of the RPC at low temperature (30C,
b. Results of the RPC at room temperature (21C,
22F).
70F).
Secant
Secant
Peak stress
Strain at
modulus
Peak stress
Strain at
modulus
Specimen
(psi)
peak stress
(psi)
Specimen
(psi)
peak stress
(psi)
1CDL
3251.79
0.0439
74,140
1DL
1461.46
0.1146
12,749
2CDL
2882.96
0.0494
58,190
2DL
1400.69
0.0521
26,861
3CDL
2318.33
0.0301
76,918
3DL
1283.53
0.0628
20,423
4CDL
2220.51
0.0384
57,869
4DL
1375.01
0.10824
12,703
5DL
1378.44
0.1139
12,102
5CDL
3160.98
0.0471
67,126
6DL
1459.84
0.0502
29,067
6CDL
2490.11
0.0450
55,373
7DL
1402.15
0.0708
19,810
7CDL
2704.26
0.0409
64,176
Average
2717.99
0.04213
64,828
Average
1394.45
0.0818
19,102
Std. dev.
60.28
0.0294
6,977
Std. dev.
401.62
0.0065
8,371
1WL
1571.48
0.0609
25,625
1WCL
2516.75
0.0394
63,953
2WL
1686.93
0.0722
23,378
2WCL
2435.011
0.0302
80,505
3WL
1295.29
0.0609
22,288
3WCL
2366.31
0.0288
82,157
4WL
1597.52
0.0691
23,115
4WCL
2310.07
0.0310
74,619
5WL
1738.62
0.0805
21,608
5WCL
2570.08
0.0285
90,076
6WL
1281.59
0.0665
19,258
6WCL
2547.10
0.0374
68,180
7WL
1696.23
0.0793
21,825
7WCL
2322.88
0.0264
87,941
Average
1552.52
0.0699
22,471
Average
2438.31
0.0317
78,204
Std. dev.
189.43
0.0080
2,000
Std. dev.
108.26
0.0048
9,773
1CDT
2923.24
0.0445
65,658
1DT
1895.62
0.0642
29,516
2CDT
3107.87
0.0452
68,757
2DT
1593.26
0.0630
25,286
3CDT
3383.21
0.0404
83,771
3DT
1720.40
0.0545
31,528
4CDT
3062.94
0.0460
66,514
4DT
1893.09
0.0648
29,219
5CDT
3018.12
0.0463
65,239
5DT
1696.46
0.0543
31,250
6CDT
3577.07
0.0500
71,610
6DT
1711.33
0.0525
32,619
7CDT
3556.67
0.0470
75,697
7DT
1862.01
0.0605
30,782
Average
3232.73
0.0456
71,035
Average
1767.415
0.0591
30,028
Std. dev.
268.457
0.0029
6,738
Std. dev.
116.83
0.0052
2,395
1WCT
3110.41
0.0446
69,696
1WT
1922.94
0.0621
30,991
2WT
2006.44
0.0680
29,514
2WCT
3183.20
0.0470
67,671
3WCT
3135.11
0.0421
74,421
3WT
1739.41
0.0527
32,980
4WCT
3652.15
0.0540
67,607
4WT
1715.00
0.0497
34,541
5WCT
3436.36
0.0478
71,835
5WT
1657.62
0.0525
31,582
6WCT
3213.35
0.0545
58,929
6WT
1985.66
0.0617
32,167
7WCT
3691.78
0.0491
75,208
7WT
1977.83
0.0654
30,238
Average
3346.05
0.0485
69,338
Average
1857.84
0.0589
31,716
Std. dev.
246.82
0.0046
5,489
Std. dev.
148.08
0.0072
1,701
1DTT
1754.84
0.0656
26,770
1CDTT
3738.73
0.0607
61,585
2DTT
1755.14
0.0746
23,625
2CDTT
3695.97
0.0562
65,758
3DTT
1830.36
0.0749
24,448
3CDTT
3649.45
0.0563
64,796
4DTT
1778.56
0.0663
26,846
4CDTT
3715.04
0.0548
67,771
5DTT
1710.68
0.0655
26,128
5CDTT
3838.96
0.0603
63,656
6DTT
1768.88
0.0741
23,872
6CDTT
3879.02
0.0636
60,953
7DTT
1818.33
0.0702
25,913
7CDTT
3712.03
0.0585
63,457
Average
1773.83
0.0701
25,372
Average
3747.03
0.0586
63,997
Std. dev.
40.66
0.0043
1,363
Std. dev.
81.98
0.0031
2,362
1WTT
2031.60
0.0713
28,489
1WCTT
3756.46
0.0695
54,057
2WTT
2033.18
0.0787
25,824
2WCTT
3651.71
0.0646
56,560
3WTT
2058.90
0.0772
26,674
3WCTT
3695.94
0.0574
64,422
4WTT
2074.38
0.0822
25,241
4WCTT
3529.05
0.0577
61,110
5WTT
1986.51
0.0829
23,954
5WCTT
3547.06
0.0626
56,673
6WCTT
3598.44
0.0570
63,161
6WTT
2074.70
0.0812
25,587
7WCTT
3745.53
0.0582
64,377
7WTT
2087.09
0.0885
23,583
Average
2049.48
0.0800
25,622
Average
3646.31
0.0610
60,051
Std. dev.
34.91
0.0050
1,656
Std. dev.
91.62
0.0048
4,245
SI conversion factors: 1 in. = 25.4 mm, 1 lb = 0.454 kg, 1 psi = 6.89 kPa.
Legend: D = dry W = wet L = longitudinal (x direction) T = transverse (y direction) TT = transverse (z direction)
30
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