51967492 Bc Design Mix Speco 2 Lime

7/28/2019 51967492 Bc Design Mix Speco 2 Lime

1/13

A) MATERIAL SOURCE :

25 mm : Pachami/Salbhadra



Lime Powder : Local Market

B) PHYSICAL CHARACTERISTICS OF AGGREGATE :

1

2

3

4

5

6

7

8

C) PROPERTIES OF BITUMEN :

1

2

3

4

5

6

7

8

9

D) SPECIFIC GRAVITY AND WATER ABSORPTION PROPERTIES :

1

2

3

4

5

E) PREPARATION AND ANALYSIS OF MARSHALL SPECIMEN :

Temperature of aggregate : 155 - 170 C

Temperature of Bitumen : 150 - 165 C

Temperature of Mix : 150 - 165 C

Rolling Temperature : 90 C min

Sl.

No.

Aggregate Size

From Hot Bin

Specific

Gravity

Water

Absorption

Requirement as per MOST

specification (%)

5 mm down 2.985 0.32

40 - 20 mm 3.002 0.18

0.19

Soluble Matter in CS2 (%) 99.5 Min. 99.0

Water Content (%) 0.11 Max. 0.2

Softening Point (Degrees) 42.00 40 - 55

Viscosity (centistokes) 82 Min. 70

Flash Point (0C) 195.00 Min. 175

Loss on Heating (%) 0.93 Max. 1.0

Specific Gravity at 270C 1.01 Min. 0.99

Ductility @ 250

C (cm) 78.00 Min. 75

Sl.

No.Description Lab results


specification (%)

Grade @ 250

C 67.00 60 - 70

Stone Polished Value : Dry Min. 55

: Wet Min. 55

Max. 4

Sand Equivalent Value Min. 50

Plasticity Index of mix

Soundness Loss with Sodium Sulphate Max. 12

Max. 95

Fractured Faces Max. 90

Coating & Stripping of aggregate (Min. Retained)

Sl.

No.Description Lab results

Flakiness & Elongation value (Combined)


specification (%)

Aggregate Impact value Max. 24

Max. 30

Marshall specimen were prepared in the above aggregate proportion and varying Bitumen Contents from 3.5%

to 5.5% by weight of the mix and by compacting with 75 blow on either side.

Lime Powder 2.558 0.00

Max. 2.0 %

20 - 11 mm 2.996 0.28

11 - 5 mm 3.011


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F) DETERMINATION OF DENSITY, VOIDS ANALYSIS, MARSHALL STABILITY AND FLOW TEST WITH :

DIFFERENT % OF BITUMEN USED :

1

2

3

4

5

6

7

G) DETERMINATION OF OPTIMUM BITUMEN CONTENT :

BITUMEN CONTENT AT,

1 Max. C.D.M. (gm/cc) :

2 Air voids in mix (%) :

3 Voids in mineral aggregate (%) :

4 Voids filled with Bitumen (%) :

5 Marshall Stability (kgs) :

6 Flow (mm) :

OPTIMUM BITUMEN CONTENT (%) :

H) DETAILS OF JOB MIX FORMULA FOR DBM AT OBC AND WITH VARIATION OF +/- 0.3 %

1

2

3

4

5

6

900 (min)

Flow (mm) 2 - 4

Marshall Stability (kg at 600C)

13 - 14 (min)

Voids filled with Bitumen (%) 65 - 75

Voids in mineral aggregates (%)

---

Air Voids in mix (%) 3 - 6

Compacted Density of mix (gm/cc)

4.50

Sl.No.

Description Bitumen Content (%) MOST SpecificationLimits

Flow (mm) 2.23 2.50 3.13 3.63

Voids filled with Bitumen (%) 53.26

Marshall Stability (kgs) 1235.00 1241.00 1239.00

67.66 79.02

2.62 3.01

15.34 16.8714.87 14.51

1224.00 1206.00

Air Voids in total mix (%) 7.53 4.81 3.04

82.94 82.15

Voids in Mineral aggregate (%) 16.12

2.660 2.626

Specific Gravity of mix (Max) 2.806 2.781 2.756 2.731 2.708

Compacted Density of mix (gm/cc) 2.595 2.647 2.672

Sl.

No.Description

Bitumen Content used (%)

3.50 4.00 4.50 5.00 5.50


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COMBINED GRADATION OF AGGREGATES FROM HOT BIN :

40mm-20mm

20mm-11mm

11mm-5mm

5mm-below

40mm-20mm

20mm-11mm

11mm-5mm

5mm-below

Lime % ofpassing

G-4 G-3 G-2 G-1 40% 35% 12% 11% 2% 100

26.50 100 100 100 100 100 40.00 35.00 12.00 11.00 2.00 100 9

19.00 69.37 98.77 100 100 100 27.75 34.57 12.00 11.00 2.00 87.32

13.20 59.52 72.00 100 100 100 23.81 25.20 12.00 11.00 2.00 74.01

10.00 32.45 57.57 99.73 100 100 12.98 20.15 11.97 11.00 2.00 58.10

4.75 4.52 52.44 87.59 99.60 100 1.81 18.35 10.51 10.96 2.00 43.63

2.36 1.20 37.15 75.41 85.70 100 0.48 13.00 9.05 9.43 2.00 33.96

1.18 21.85 54.19 64.35 100 7.65 6.50 7.08 2.00 23.23

0.600 14.81 41.44 48.25 100 5.18 4.97 5.31 2.00 17.46

0.300 5.21 25.77 32.43 99.96 1.82 3.09 3.57 2.00 10.48

0.150 12.1 24.40 96.65 1.45 2.68 1.93 6.07

0.075 9.56 94.91 1.05 1.90 2.95

Lime

COMBINED GRADATION FOR HOT BIN

Sieve Size

in (mm)

INDIVIDUAL GRADATION FROM HOT BIN

20

30

40

50

60

70

80

90

100

%O

FPASSING

COMBINED GRADATION DBM


4/13


5/13

92

79.32

67.01

51.10

37.63

28.96

18.23

12.46

6.48

2.07

0.95

3.58

JMF

Lower

Limit


6/13


7/13

G-1 G-2 G-3 G-4 G-5

40m

m -

20m

m

20m

m -

11m

m

11m

m -

5mm

5mm-

belowLime

% of

passing

T

40% 35% 12% 11% 2% 100 (%) (%) (gms) (gms) (g

26.5 100 100 100 100 100 40.00 35.00 12.00 11.00 2.00 100 90-100 100

22.4 97.99 100 100 100 100 39.20 35.00 12.00 11.00 2.00 99.20

19.0 69.37 98.77 100 100 100 27.75 34.57 12.00 11.00 2.00 87.32 71-95 89.5 11.88 142.54

16.0 3.38 65.83 100 100 100 1.35 23.04 12.00 11.00 2.00 49.39 37.93 455.10

13.2 1.70 36.00 100 100 100 0.68 12.60 12.00 11.00 2.00 38.28 56-80 69 11.11 133.35

10.0 9.38 99.73 100 100 3.28 11.97 11.00 2.00 28.25 62 10.03 120.35

6.3 1.85 66.17 100 100 0.65 7.94 11.00 2.00 21.59 6.66 79.95

4.75 27.59 99.60 100 3.31 10.96 2.00 16.27 38-54 45 5.32 63.85

2.36 3.90 85.70 100 0.47 9.43 2.00 11.90 28-42 36 4.37 52.46

1.18 64.35 100 7.08 2.00 9.08 7-21 27 2.82 33.80

0.60 48.25 100 5.31 2.00 7.31 NM 21 1.77 21.25

0.30 32.43 99.96 3.57 2.00 5.57 10-20 15 1.74 20.89

0.15 16.40 96.65 1.80 1.93 3.74 5-13 9 1.76 0.07 21.16 0.79

0.075 9.16 94.91 1.01 1.90 2.91 2-8 5 0.80 0.03 9.56 0.42

Passing 3.48 1.90 41.76 22.80

##

Sieve

Size

in

(mm)

Bitumen used (%

Spec.

Limit

Mid

Curve

Agg & Filler

Retain5mm

belowLime

Aggregate & Filler

40m

m -

20m

m

11m

m -

5mm

20m

m -

11m

m

Wt of Agg &

Filler

COMBINED GRADATION OF AGGREGATES

Total Wt in gms

INDIVIDUAL GRADATION

COMBINED GRADATION


8/13

COMPACTION : GRADE O

SPECIFIC GRAVITY OF BITUMEN : 1.018 ABSORB

GRADE OF BITUMEN : EFFECTIV

LIME POWDER USED : 2 % BULK Sp

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

3.01 16.87Average 2.626 2.708

1186.10 738.56 1191.10 452.54 2.621

1187.80 740.48 1192.80 452.32 2.6265.50

1186.90 740.78 1191.90 451.12 2.631

2.660 2.731 2.62 15.34Average

1185.80 745.51 1190.80 445.29 2.663

1191.90 746.96 1196.90 449.94 2.6495.00

1191.70 750.04 1196.70 446.66 2.668

3.04 14.51Average 2.672 2.756

1195.60 752.14 1200.60 448.46 2.666

1197.80 755.86 1202.80 446.94 2.6804.50

1194.00 751.81 1199.00 447.19 2.670

2.647 2.781 4.81 14.87Average

1237.00 774.33 1242.00 467.67 2.645

1240.00 778.50 1245.00 466.50 2.6584.00

1230.00 768.74 1235.00 466.26 2.638

Average 2.595 2.806 7.53 16.12

1197.50 741.75 1202.50 460.75 2.599

1202.30 741.09 1205.30 464.21 2.5903.50

1199.60 741.33 1203.60 462.27 2.595

in Air in Water SSD in Air

Air voids

in mix

(%)

Voids inmineral

aggregates

(%)

V

w

SUMMARY OF TEST RESULTS OF D.B.M. MIX AT DIFFERENT BITUMEN CONTENT AT

Sl.

No.

%ofBitumen

by wt. of

mix

Mass (Gms) Bulk

Volume

(cc)

Bulk Density

of specimen

(gm/cc)

Max.

Theoretical

Specific Gravity


9/13

1

2

3

4

5

6

7

Sl.

No.

3.132.50

Specific Gravity of mix (Max)

Air Voids in total mix (%) (VA)

2.781

Description

Compacted Density of mix (gm/cc)

Bitumen Content used

3

1235.00

Voids in Mineral aggregate (%) (VMA)

Voids filled with Bitumen (%) (VFB) 79.02

14.51

67.6653.26

16.12

8

Marshall Stability (kgs)

Flow (mm)

1239.001241.00

2.23

12

4.81

14.87

3.04 2

1

7.53

2.672

4.50

2

2.756

5

22.806

2.595

3.50 4.00

2.647


10/13

14.00

14.50

15.00

15.50

16.00

16.50

17.00

17.50

3.00 3.50 4.00 4.50 5.00 5.50 6.00

VMA

(%)

Bitumen Content (%)

2.50

3.50

4.50

5.50

6.50

7.50

3.00 3.50 4.00 4.50 5.00 5.50 6.00

AirVoids(%)

Bitumen Content (%)

2.590

2.600

2.610

2.620

2.630

2.640

2.650

2.660

2.670

2.680

3.00 3.50 4.00 4.50 5.00 5.50 6.00

Density(gm/cc)

Bitumen Content (%)


11/13

2.00

2.50

3.00

3.50

4.00

4.50

5.00

3.00 3.50 4.00 4.50 5.00 5.50 6.00

Flow

(mm)

Bitumen Content (%)

52.00

57.00

62.00

67.00

72.00

77.00

82.00

87.00

3.00 3.50 4.00 4.50 5.00 5.50 6.00

VFB

(%)

Bitumen Content (%)

1200

1205

1210

1215

1220

1225

1230

1235

1240

1245

3.00 3.50 4.00 4.50 5.00 5.50 6.00

MarshallStability(kg)

Bitumen Content (%)


12/13

CALCULATION OF BULK SPECIFIC GRAVITY OF TOTAL AGGREGATE (Gsb) :

100

2.985 = ------------------------------------------------------------------------------------------------------------------------------------------------------------% of 40mm 5 % of 20mm 35 % of 10mm 20 % of 6mm 38 % of Lim

--------------------------------- --------------------------------- --------------------------------- --------------------------------- --------------S.G. of 40mm 3.002 S.G. of 20mm 2.996 S.G. of 10mm 3.011 S.G. of 6mm 2.985 S.G. of L

CALCULATION OF APPARENT SPECIFIC GRAVITY OF TOTAL AGGREGATE (Gsa) :

100

3.009 = ------------------------------------------------------------------------------------------------------------------------------------------------------------% of 40mm 5 % of 20mm 35 % of 10mm 20 % of 6mm 38 % of Lim

--------------------------------- --------------------------------- --------------------------------- --------------------------------- --------------S.G. of 40mm 3.018 S.G. of 20mm 3.021 S.G. of 10mm 3.028 S.G. of 6mm 3.014 S.G. of L

CALCULATION OF EFFECTIVE SPECIFIC GRAVITY OF TOTAL AGGREGATE (Gse) :

+2.997 = -----------------------------------------------------------------------

CALCULATION OF MAX. THEORITICAL DENSITY AT VARIOUS BITUMEN CONTENT (Gmm) :

100-------------------------------------------------------------------------------------------

--------------------------------- -----------------------------------------

AT 3.5% (BITUMEN CONTENT BY WEIGHT OF MIX ) Gmm :





2.731

2.708

Gmm =*Ps

Gse

2.806

2.781

+% of Bitumen in Mix

Sp. Gr. Of Bitumen

2.756

+

+ + + +

[ *Ps = % of Aggregate by Total Mix of Mixture

2.985 3.009

2

+ + +


13/13

Gmm - *Gmb * Where Gmb is Bulk Density of Mix

Gmm

Gmb X *Ps * Where Ps is % of Aggregate in Mix

Gsb

Vma - Va

Vma

82.94 82.15Voids filled with bitumen (VFB) 53.26 67.66 79.02

CALCULATION OF VOIDS FILLED WITH BITUMEN VFB

VFB = 100 X

Bitumen Content (%) 3.50 4.00 4.50 5.00 5.50

5.00 5.50

Voids in mineral aggregate (Vma) 16.12 14.87 14.51 15.34 16.87

Bitumen Content (%) 3.50 4.00 4.50

2.62 3.01

CALCULATION OF VOIDS IN MINERAL AGGREGATE : Vma

Vma = 100 -

Air Voids (Va) (%) 7.53 4.81 3.04

CALCULATION OF AIR VOIDS : Va

Va = 100 X

Bitumen Content (%) 3.50 4.00 4.50 5.00 5.50

Documents

51967492 Bc Design Mix Speco 2 Lime