APPENDIX D: MASONRY UNIT FREEZETHAW DURABILITY TEST RESULTS
NCMA Research Lab: ASTM C 1262 FreezeThaw Data Sheet
Specimens: SRW (A)
Cycle 145
Cycle 283
Cycle 373
Cycle 448
Cycle 542
Cycle 818
Cycle 875
Acc.*
%
Acc.
%
Acc.
%
Acc.
%
Acc.
%
Acc.
%
Acc.
%
SSD†
res.
loss
res.
loss
res.
loss
res.
loss
res.
loss
res.
loss
res.
loss
Unit
wt.
wt.
from
wt.
from
wt.
from
wt.
from
wt.
from
wt. from
wt.
from
no.
(lb)
(lb)
SSD
(lb)
SSD
(lb)
SSD
(lb)
SSD
(lb) SSD
(lb) SSD
(lb)
SSD
SRW (A)-1
2.9514
0.0040
0.1
0.0066
0.2
0.0106
0.4
0.0124
0.4
0.0148
0.5
0.0222
0.8
0.0236
0.8
SRW (A)-2
3.0012
0.0032
0.1
0.0048
0.2
0.0060
0.2
0.0072
0.2
0.0084
0.3
0.0136
0.5
0.0222
0.7
SRW (A)-3
3.0584
0.0032
0.1
0.0048
0.2
0.0058
0.2
0.0068
0.2
0.0074
0.2
0.0104
0.3
0.0118
0.4
SRW (A)-4
3.0882
0.0032
0.1
0.0048
0.2
0.0058
0.2
0.0070
0.2
0.0080
0.3
0.0118
0.4
0.0138
0.4
SRW (A)-5
3.0884
0.0018
0.1
0.0028
0.1
0.0032
0.1
0.0036
0.1
0.0042
0.1
0.0062
0.2
0.0066
0.2
SRW (A)-6
3.1062
0.0012
0.0
0.0022
0.1
0.0024
0.1
0.0030
0.1
0.0034
0.1
0.0052
0.2
0.0058
0.2
SRW (A)-7
3.1480
0.0028
0.1
0.0042
0.1
0.0050
0.2
0.0056
0.2
0.0062
0.2
0.0094
0.3
0.0098
0.3
SRW (A)-8
3.1530
0.0040
0.1
0.0070
0.2
0.0080
0.3
0.0094
0.3
0.0102
0.3
0.0144
0.5
0.0162
0.5
SRW (A)-9
3.0760
0.0044
0.1
0.0062
0.2
0.0070
0.2
0.0080
0.3
0.0082
0.3
0.0120
0.4
0.0130
0.4
SRW (A)-10
3.2016
0.0044
0.1
0.0064
0.2
0.0078
0.2
0.0086
0.3
0.0094
0.3
0.0132
0.4
0.0142
0.4
Avg.
3.0872
0.1
0.2
0.2
0.2
0.3
SD
0.0695
COV
2.2504
* Accumulated residual weight.
† Saturated, surface dry.
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