israeli standard for aggregates is 3 bentur- israel… · strategies for using dust/fines as...
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Israeli Standard for Aggregates – IS 3
Arnon Bentur
Presentation at the
TAIEX expert mission on the Resource Efficiency of Construction and Concrete Materials
Technion, Haifa, IsraelJuly 17th, 2018
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1001
millimetersmicrons
clays cement grains fine aggregate coarse aggregates
Size Range
Dust/Fines/Filler/Micro-fines
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Range and Definitions• Lightweight aggregate – up to 2000 kg/m3• Heavy weight aggregate – more than 3000 kg/m3• Coarse aggregate – bigger than 4.75 mm• Fine aggregate – smaller than 4.75 mm• Fine natural aggregate (natural sand)• Fine crushed aggregate (crushed sand)• Dust – most passing 75 microns • EN – Fines, particle size fraction of an aggregate which passes the 63 micronsns sieve• Clay lumps• Aggregate labelling – maximum and minimum sizes (e.g. 19/5)• Maximum aggregate size• Filler – material serving as mineral additive, obtained in crushing of limestone or dolomite rocks• all smaller than 600 microns at least 65% smaller than 75 microns• Flaky aggregate• Elongated aggregate• Single size aggregate• Multi size aggregate
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Grading – Coarse Aggregate: Table 2
No definition of all-in aggregateEN Definition:aggregate consisting of a mixture of coarse and fine aggregates
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Grading – Fine Aggregate: Table 3, 2016 Revision
Natural Crushed
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Grading – Fine Aggregate: Table 3, 2016 Revision
Filler definition somewhat different than EN:IS - all smaller than 600 microns, 65% smaller than 75 micronsEN - all smaller than 2mm, at least 85% smaller than 125 microns, at least 70% smaller than 63 microns
Natural Crushed
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Coarse aggregate for concrete: Table 4
Concrete gradeType A – 40MPa grade concrete (B40-C25/30)or moreType B – 30MPa concrete maximum (B30-C20/25)
LA Crushing ValueType A – 23 maximumType B – 28 maximum
AbsorptionType A – 2.5% maximumType B – 4.0% maximum
Dust (fines)Type A – 1.5% maximumType B – 2.0% maximum
5.5 Particle density and water absorption
When required the particle density and water absorption shall be
determined in accordance with EN 1097-6 and
the results declared on request stating the means of determination
and the calculations used.
AB
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Concrete Grading IS188, 466 and EN 206
B30 - C20/25B40 – C25/30
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Coarse aggregate for concrete: EN
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0
10
20
30
40
50
60
70
LA15 LA20 LA25 LA30 LA35 LA40 LA45 LA50 LA60
EN Classification – LA crushing value
IS – Type A
Cru
shin
hva
lue,
LA
tes
t
EN
IS – Type B
0
0.2
0.4
0.6
0.8
1
1.2
20 30 40 50 60 70
Max. EN
Max. IS
Rel
ativ
e st
ren
gth
of
con
cret
e
LA crushing value
3 %
Implications of Limits on Crushing Strength of Coarse Aggregates
Crushing value classificationsCrushing values and concrete strength
Source: A.Bekoe and M.Tia, University of Florida, Gainesville
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Fine aggregate for concrete: Table 5
6 2 ת"ג
Concrete gradeType A – 40MPa grade concrete (B40-C25/30)or moreType B – 30MPa concrete maximum (B30-C20/25)
Dust (fines) contentType A – 15% maximumType B – 20% maximum
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0
5
10
15
20
25
f3 f4 f5 f6 f7 f10 f16 f22
EN classification
0
5
10
15
20
25
F5 F10 F15 F20
IS classification
Type B
Type A
Limits on Dust (IS) and Fines (EN) in Fine Aggregate
Clay limits -ENMethylene blue less than 3 when the fines content is above 3%
Clay limits -IS15% mximum content in dust of particles smaller than 5 microns
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Strategies for Using Dust/Fines as Fillers in ConcreteEN 12620 – Filler - material serving as mineral additive, obtained in crushing of limestone or dolomite rocks
all smaller than 600 microns at least 65% smaller than 75 microns
EN 2063.1.2.1 addition: finely-divided-inorganic constituent used in concrete in order to improve certain properties or to achieve special properties 3.1.2.2 type I addition: nearly inert addition 3.1.2.3 type II addition: pozzolanic or latent hydraulic addition
IS 118Allows use of filler, no provisions for properties, except sizeIS 466 Allows use of materials not covered by Israeli standard, if they comply with a foreign standardEN 12620Does not specify limiting values on properties, except definition of size• the sand equivalent value (SE) when tested in accordance with EN 933-8 exceeds a specified lower limit;• the methylene blue test (MB) when tested in accordance with EN 933-9 gives a value less than a particularspecified limit;• equivalence of performance with known satisfactory aggregate is established or there is evidence ofsatisfactory use with no experience of problems.
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Thanks for your attention