NHL 5 NHL 3.5 NHL 2
Combined Silica bands 12-16 8-12 4-8
Available lime % 15-20 (>3) 20-25 (>6) 50-60 (>8)
Density lbs/cu.ft (gr/litre) 650/750 (600-1000) 600/660 (500-900) 450/520 (400-600)
Surface cover (sq.ft/oz) 244 274 362
Granulometry:
Residue @ 0.09mm
7% 6.5% 5%
Whiteness Index (Y) 67 72 76
Compressive strength* (PSI) 725-2175 507-1450 322-1015
Flexural strength N/mm2* 333 290 145
Soundness ( max. 2mm)** <1/32" <1/32" <1/32"
Set, beginning (1-15 h) *** 3-4 5-6 8-10
FIGURES IN BRACKETS AND ITALICS REFER TO THE INCOMING EU 459-1 NORMS
* PSI @ 28days. Measured in accordance with EU Norm EN 459 on EU Std. Mortars @ 1:1.3 mix ratio. Values vary depending on dosages and sands used.
** Expansion (soundness) measured according to EN459-2/5.3.2.2 and French Norm NFP15-311, not using Le Chatellier Test which allows expansion value up to 3/4".
*** On mortars. Not on lime paste.
Tests on common mortar mixes
Binder : Sand Ratio
1 : 2
1 : 2.5
1 : 3
 
NHL5
NHL3.5
NHL2
NHL 5
NHL3.5
NHL2
NHL5
NHL3.5
NHL2
Set (beginning) hours
3.4
5.3
8.45
3.3
6
9
3.3
6
9.3
Elasticity Moduli
28 days N/mm2
10800
9010
9025
11000
9000
9800
10000
8970
9000
6 months
18000
16250
12600
17050
13505
12030
16900
12450
11800
12 months
18510
15280
12515
17280
13620
12030
16150
13150
11900
24 months
21500
17480
13375
18020
13785
12000
17430
13670
11750
Compressive strength  
7 days               PSI
284
109
90
145
83
77
128
77
68
28 days
319
273
215
290
213
197
217
194
181
6 months
101
1029
557
857
774
435
770
571
418
12 months
134
1087
580
1224
855
420
942
565
420
24 months
1567
1251
616
1277
870
435
1131
576
399
Permeability (vapour exchange)
Gr. of air x m2 x hour x mmHG
0.55
0.62
0.68
0.6
0.64
0.7
0.69
0.70
0.71
Shrinkage mm.m
0.13
0.44
0.60
0.25
0.60
0.84
0.35
0.67
0.89