six lan rocad construction
TRANSCRIPT
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Component of national highways road1. O.G.L. (original ground level)2. Embankment3. Subgrade4. G.S.B. (Grannular sub base)5. W.M.M. (water mix macadam) 6. Prime coat7. Tech coat8. D.B.M. (dense bitumen macadam)9. B.C. (bitumen coating)
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1. OGL – It stands for original ground level. There are some tests perform for this layer-
Lab. test Sieve analysis - (gradation test ) Proctor test - MDD OMC Liquid limit & plastic limit Free swelling test
Site test- FDD test (Field dry test) Degree of compaction = core density /marshall density
= 95%
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2. Embankment- an artificial slope made of earth and/or stones: thickness of every layer 200 mm.
Lab. test Sieve analysis - (gradation test ) Proctor test - MDD OMC Liquid limit & plastic limit Free swelling test
Site test- FDD test (Field dry test) Degree of compaction = core density /marshall
density = 97%
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3. Subgrade- Combination of sand , crushed stone and bricks
Lab. test Sieve analysis - (gradation test ) Proctor test - MDD OMC Liquid limit & plastic limit Free swelling test C.B.R.
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Site test- FDD test (Field dry test) Degree of compaction = core density /marshall
density = 98%
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Serial no. Name of test Method Min. requirement Frequency
1. Sand content (GSA) IS-2720 part-4
Max. size<75mm 2 test/3000m3
2. Atterberg limits IS-2720 part-5
LL<70%PI<45%
2 test/3000m3
3. Modified proctor density
IS-2720 part-8
MPD>1.5gm/cc(for embankment)MPD>1.75gm/cc(for subgrade)
2 test/3000m3
4. Free swelling index IS- 2720 part-28
50% max. 2 test/3000m3
5. Field density IS- 2720 part-28
Degree of compaction>95% (for embankmemt)
Degree of compaction >97% (for subgrade)
1 test/1000m21 test/500m2
6. CBR (for subgrade) IS- 2720 part-16
CBR>10% 1 test/3000m2
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CBR apparatus
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G.S.B.- GSB composed in two layers -1.lower layer
2.uper layer Thickness of 1st layer – 100mm for MCW Thickness of 2nd layer- 175 mm for MCW Thickness of GSB for service road – 200 mm GSB consist natural sand, crushed stone,
crushed gravel, combination of these
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Lab. test Sieve analysis - (gradation test ) Proctor test - MDD OMC Atterberg limit (Liquid limit & plastic limit) Free swelling test C.B.R. Moisture limit 10% fine value
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Site test- Field dry density test Degree of compaction = core density /
marshall density = 98%
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Serial no. Name of test Method Min. Requirement
Frequency
1. Gradation IS-2386 part-1 IS-2720 part-1
As per MORT&H
1 test/200m3
2. Atterberg limit IS-2720 part-5 LL<25%PI<6%
1 test/200m3
3. Moisture content IS-2720 part-2 -2&+1 of OMC
1 test/250m3
4. Field density IS-2720 part-28 98% of OMD 1 test/500m3
5. Surface level tolerance
+10mm &-20mm
Regular chacking
6. CBR (4 days socking)
IS-2720 part-16 30% min.(Table-400-1)
As required
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7. Modified proctor density
IS-2720 part-8
One test per source
8. 10% fine value
BS-812 part-3
50kn (min.)(Table-401.2.2)
One test per source/as required
9. Water absorption
IS-2386 part-3
<2% One test per source/as required
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ATTERBERG LIMITS APPARATUS
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W.M.M. WMM composed in two layers -1.lower layer
2.uper layer Thickness of 1st layer – 125mm for MCW Thickness of 2nd layer- 125 mm for MCW Dust (30%) + aggregate (10mm + 20mm +
40mm)(70%) ---------- mix------add water (5.7%)------ mix.------------- truck----------- site.
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Plant operation
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Lab. test Sieve analysis - (gradation test ) Proctor test - MDD OMC Atterberg limit (Liquid limit & plastic limit) Free swelling test C.B.R. Moisture limit A.V.I. test EI & FI
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Site test- Field dry density test Degree of compaction = core density /
marshall density = 98%
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Serial no.
Name of test Method Min. Requirement
Frequency
1. Gradation IS-2386 part-1
MORT&H table-400-2
1 test/100m3
2. Atterberg limit
IS-2720 part-5
PI<6% 1 test/100m3
3. AIV IS-2386 part-4
30% (max.) 1 test/200m3
4. LAV IS-2386 part-4
40% (max.) As required
5. EI & FI IS-2386 part-1
30% (max.) 1 test/200m3
6. Field density IS-2720 part-28
98% (min.)of MDD
1 test/500m3
7. Modified proctor density
IS-2720 part-8
One test per source
8. Water absorption
IS-2386 part-3
2% (max.) One test per source/req.
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AIV apparatus
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FI & EI APPARATUS
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Prime coat & Tech coat
it is a spray on wmm layer to avoid voids.
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D.B.M.— DBM composed in two layers -1.lower layer
2.uper layer Thickness of 1st layer – 75mm for MCW Thickness of 2nd layer- 50 mm for MCW Aggregate (20mm(35%) +10mm(20%)) +
Dust (43%) +Lime (2%)----- mix.--------Heat----------- Bitumen (4.5%)-----mix.----------- Truck -------- Site
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Site test- Field dry density test Degree of compaction = core density /
marshall density = 98%
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B.C. – BC composed In single layer of thickness 50
mm. Aggregate [19mm passing (13mm
retaining )]+ dust + lime-------- mix------heat-------------- Bitumen ------- mix--------------- truck-------- site
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Serial no.
Name of test Method Min. requirement
DBM BC
1. Quality of binder
60/70 CRMB-60
2. AIV IS-2386 part-4 27% (max.) 24% (max.)
3. EI & FI IS-2386 part-1 30% (max.) 30% (max.)
4. Water absorption
IS-2386 part-3 2% (max.) 2% (max.)
5. Coating & stripping of bitumen aggregate mixture
AASHTO-182 & IS-6241
Min. retained coating 95%
Min. retained coating 95%
6.
LOS Angles Abrasion value
IS-2386 part-435% (max.)
35% (max.)
30% (max.)
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7. Soundness
IS-2386 part-5
12% (max.) 12% (max.) At source approval
8. Marshal stability test
MORT&H table-500-1&ASTM-D-1559
%AV.=3-6%VMA.=12%(min.)VFB=65-75%STABILITY=9knFLOW=2-4mm
%AV.=3-5%VMA.=12%(min.)VFB=65-75%STABILITY=12knFLOW=2-4mm
9. Field compaction
ASTM-D-1559 98% of bulk density
98% of bulk density
10.
Water sensitivity
IS-clause 507.3.1
<75% <75%
11.
Roughness
TS clause:903.4.4
2000MM/kn 2000MM/kn
12.
Plasticity index
IS-2720 part-5 4% (max.) 4% (max.)
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BITUMEN Extractor
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MARSHALL STABILITY TEST APPARATUS
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DUCTILITY APPARATUS
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BITUMEN PENETROMETER
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CORE CUTTING
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SLUMP CONE