six lan rocad construction

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)

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%

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%

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.

Site test- FDD test (Field dry test) Degree of compaction = core density /marshall

density = 98% 

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

CBR apparatus

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

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

Site test- Field dry density test Degree of compaction = core density /

marshall density = 98%

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

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

ATTERBERG LIMITS APPARATUS

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.

Plant operation

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

Site test- Field dry density test Degree of compaction = core density /

marshall density = 98%

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.

AIV apparatus

FI & EI APPARATUS

Prime coat & Tech coat

it is a spray on wmm layer to avoid voids.

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

Site test- Field dry density test Degree of compaction = core density /

marshall density = 98%

B.C. – BC composed In single layer of thickness 50

mm. Aggregate [19mm passing (13mm

retaining )]+ dust + lime-------- mix------heat-------------- Bitumen ------- mix--------------- truck-------- site

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.)

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.)  

BITUMEN Extractor

MARSHALL STABILITY TEST APPARATUS

DUCTILITY APPARATUS

BITUMEN PENETROMETER

CORE CUTTING

SLUMP CONE