NCMA-SRW-J10
Cum. no. of points landing on
Cumulative
Volume fractions (%)
No. of inter-
Traverse
Fine
Cement
Total
total no.
Fine
Cement
Total
connected
no.
aggregate
paste
air
of points
aggregate
paste
air
air voids
1
51
27
5
83
61.4
32.5
6.0
12
2
106
52
8
166
63.9
31.3
4.8
24
3
152
80
15
247
61.5
32.4
6.1
40
4
206
104
18
328
62.8
31.7
5.5
49
5
257
132
24
413
62.2
32.0
5.8
65
6
303
158
33
494
61.3
32.0
6.7
84
7
354
181
40
575
61.6
31.5
7.0
99
8
405
204
48
657
61.6
31.1
7.3
117
9
447
234
57
738
60.6
31.7
7.7
138
10
493
264
62
819
60.2
32.2
7.6
153
Total length of traverse (T) = (Total no. of points No. of traverse lines) * Grid interval = 513.7 mm
Voids/mm = n = N/T = 0.30
Specific surface in mm2/mm3 = 4/l = 15.74
Average chord intercept (l) in mm = A/100 n = 0.25
Paste/air ratio (p/A) = 4.258 <4.342
If p/A >4.342, then spacing factor (L) = 273 m
If p/A <4.342, then spacing factor (L) = 271 m
Conclusion: Air content is very low. Spacing factor is larger than wanted. About 80% of the aggregate is
white, relatively porous, and soft (Moh's hardness is 4). Questionable F-T resistance is expected.
NCMA-SRW-K
Cum. no. of points landing on
Cumulative
Volume fractions (%)
No. of inter-
Traverse
Fine
Cement
Total
total no.
Fine
Cement
Total
connected
no.
aggregate
paste
air
of points
aggregate
paste
air
air voids
1
21
14
7
42
50.0
33.3
16.7
16
2
46
28
11
85
54.1
32.9
12.9
35
3
73
36
17
126
57.9
28.6
13.5
51
4
97
51
19
167
58.1
30.5
11.4
74
5
118
67
24
209
56.5
32.1
11.5
95
6
136
85
31
252
54.0
33.7
12.3
122
7
156
98
39
293
53.2
33.4
13.3
141
8
174
118
41
333
52.3
35.4
12.3
166
9
197
130
48
375
52.5
34.7
12.8
192
10
217
147
54
418
51.9
35.2
12.9
215
Total length of traverse (T) = (Total no. of points No. of traverse lines) * Grid interval = 259.1 mm
Voids/mm = n = N/T = 0.83
Specific surface in mm2/mm3 = 4/l = 25.69
Average chord intercept (l) in mm = A/100 n = 0.16
Paste/air ratio (p/A) = 2.722 <4.342
If p/A >4.342, then spacing factor (L) = 137 m
If p/A <4.342, then spacing factor (L) = 106 m
Conclusion: Air content is low. Spacing factor is low (good). Based on air voids in the paste alone,
adequate F-T resistance is expected. However, almost all aggregate is pumice (large vesicles). This may
indicate questionable F-T performance. Paste/air ratio is low.
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