Suitability Properties Important Properties Gradation Relative - - PowerPoint PPT Presentation

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Suitability Properties Important Properties Gradation Relative - - PowerPoint PPT Presentation

Apr 11, 2023 139 likes •676 views

Suitability Properties Important Properties Gradation Relative density and absorption Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Deleterious substances Crushing strength Soft and

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SLIDE 1

Suitability Properties

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SLIDE 2

CIVL 3137 2

Important Properties

Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Relative density and absorption Gradation Deleterious substances Crushing strength Soft and lightweight particles Chemical stability

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SLIDE 3

Hardness

CIVL 3137 3

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SLIDE 4

Hardness

(Resistance to Wear) LA Abrasion Test

Source: http://pavementinteractive.org CIVL 3137 4

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SLIDE 5

Hardness

(Resistance to Wear) 100% retained

  • n
  • No. 12

sieve <100% retained

  • n
  • No. 12

sieve

Source: http://pavementinteractive.org CIVL 3137 5

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SLIDE 6

Hardness

(Resistance to Wear)

  

  • riginal

final

  • riginal

M M % loss 100% M

(Elapsed Time = 15 minutes = 1000 revolutions)

CIVL 3137 6

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SLIDE 7

Example

A 5015-g sample of coarse aggregate is tumbled in a Los Angeles Abrasion device for 1000 revolutions (15 minutes). When the resulting aggregate is passed through a No. 12 sieve, 3891 g of material is retained. Find the % loss

CIVL 3137 7

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SLIDE 8

CIVL 3137 9

Important Properties

Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Relative density and absorption Gradation Deleterious substances Crushing strength Soft and lightweight particles Chemical stability

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SLIDE 9

Durability

(Resistance to Weathering) Resistance to Wetting/Drying Resistance to Freezing/Thawing Resistance to Heating/Cooling

CIVL 3137 10

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SLIDE 10

Soundness Test

CIVL 3137 11

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SLIDE 11

Soundness Test

(Resistance to Weathering) MgSO4 Na2SO4

Source: http://pavementinteractive.org CIVL 3137 12

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SLIDE 12

Soundness Test

(Resistance to Weathering)

Coarse aggregate sample before testing Same sample after 5 cycles

  • f soaking and drying

Source: http://pavementinteractive.org CIVL 3137 13

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SLIDE 13

Soundness Test

(Resistance to Weathering)

Source: http://pavementinteractive.org CIVL 3137 14

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SLIDE 14

Soundness Test

(Resistance to Weathering)

  

  • riginal

final

  • riginal

M M % loss 100% M

(Elapsed Time = 5 cycles)

CIVL 3137 15

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SLIDE 15

Example

A 2175-g sample of 1" aggregate is subjected to 5 cycles of wetting (16-18 hr) and drying. When the resulting aggregate is passed through a 5/8" sieve, 1847 g of material is retained. Find the % loss

CIVL 3137 16

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SLIDE 16

CIVL 3137 18

Important Properties

Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Relative density and absorption Gradation Deleterious substances Crushing strength Soft and lightweight particles Chemical stability

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SLIDE 17

Particle Shape

(Flat and Elongated Particles)

Source: http://pavementinteractive.org CIVL 3137 19

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SLIDE 18

CIVL 3137 20

Flat and Elongated Particles

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SLIDE 19

Flat and Elongated Particles

CIVL 3137 21

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SLIDE 20

CIVL 3137 22

Proportional Caliper Device

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SLIDE 21

Proportional Caliper Device

Source: http://pavementinteractive.org CIVL 3137 24

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SLIDE 22

Particle Shape

(Coarse Aggregate Angularity)

Source: http://pavementinteractive.org

Fractured Face Fractured Faces Fractured Faces

CIVL 3137 25

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SLIDE 23

Coarse Aggregate Angularity

CIVL 3137 26

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SLIDE 24

Fine Aggregate Angularity

CIVL 3137 27

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SLIDE 25

Particle Shape

(Fine Aggregate Angularity)

Source: http://pavementinteractive.org

 

voids cyl

V % Voids 100% V   

sand sand sand w

m V RD  

voids cyl sand

V V V

CIVL 3137 28

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SLIDE 26

CIVL 3137 29

Important Properties

Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Relative density and absorption Gradation Deleterious substances Crushing strength Soft and lightweight particles Chemical stability

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SLIDE 27

Clay Content

CIVL 3137 30

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SLIDE 28

Clay Content

(Sand Equivalent Test)

Source: http://pavementinteractive.org Source: http://pavementinteractive.org

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SLIDE 29

Clay Content

(Sand Equivalent Test)

 

sand clay

H SE 100% H

Source: http://pavementinteractive.org

sand

H

clay

H

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SLIDE 30

CIVL 3137 33

Important Properties

Hardness (resistance to wear) Durability (resistance to weathering) Shape and surface texture Relative density and absorption Gradation Deleterious substances Crushing strength Soft and lightweight particles Chemical stability

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SLIDE 31

Aggregate Specifications

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SLIDE 32

CIVL 3137 35

Specifications

Source: Standard Specifications for Road and Bridge Construction (TDOT, 2006)

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SLIDE 33

CIVL 3137 36

Specifications

Clay Lumps < 0.5% Coal and Lignite < 0.5% L.A. Abrasion Loss < 40% Material Passing No. 200 Sieve < 3%

TDOT Specs for Concrete Fine Aggregate

Sodium Soundness Loss < 10%

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SLIDE 34

CIVL 3137 37

Specifications

TDOT Specs for Concrete Fine Aggregate

Percent Passing by Weight 3/8 in. (9.5 mm) 100

  • No. 4

(4.75 mm) 95 - 100

  • No. 16

(1.18 mm) 50 - 90

  • No. 50

(300 mm) 5 - 30

  • No. 100 (150 mm)

0 - 10

  • No. 200 (75 mm)

0 - 3 Sieve Size

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SLIDE 35

CIVL 3137 38

Specifications

20 40 60 80 100 0.01 0.1 1 10 100 Opening Size (mm) Percent Passing .

1½" ¾"

3/8"

4 8 16 30 50 100 200

Fine Aggregate for Concrete

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SLIDE 36

CIVL 3137 39

Specifications

Clay Lumps < 0.25% Coal and Lignite < 1% L.A. Abrasion Loss < 40% Material Passing No. 200 Sieve < 1%

TDOT Specs for Concrete Coarse Aggregate

Sodium Soundness Loss < 9% Flat and Elongated Particles (5:1) < 10%

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SLIDE 37

CIVL 3137 40

Specifications

TDOT Specs for Concrete Coarse Aggregate

Application Size No. Concrete Pavement 467 Concrete Base Course 467 Cement Treated Base Course 57 Structural Concrete 57 Prestressed Concrete 57 or 67 Precast Concrete 57 or 67

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SLIDE 38
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SLIDE 39

CIVL 3137 42

Specifications

20 40 60 80 100 0.01 0.1 1 10 100 Opening Size (mm) Percent Passing .

1½" ¾"

3/8"

4 8 16 30 50 100 200

  • No. 57

1“ nominal maximum #4 nominal minimum

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SLIDE 40

CIVL 3137 43

Specifications

20 40 60 80 100 0.01 0.1 1 10 100 Opening Size (mm) Percent Passing .

1½" ¾"

3/8"

4 8 16 30 50 100 200

  • No. 57
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SLIDE 41

GRAIN SIZE DISTRIBUTION GRAPH

10 20 30 40 50 60 70 80 90 100 1 10 100 GRAIN SIZE IN MILLIME TE RS PERCENT PASSING 1½" ¾" ⅜" 4 8 3" 16

2 3 4 5 6 7 8

Standard Sizes of Processed Aggregate (ASTM D448)

CIVL 3137 44

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SLIDE 42

Standard Sizes of Processed Aggregate (ASTM D448)

GRAIN SIZE DISTRIBUTION GRAPH

10 20 30 40 50 60 70 80 90 100 1 10 100 GR AIN SIZE IN MILLIME TE RS PERCENT PASSING 1½" ¾" ⅜" 4 8 3" 16

5 6 7 56 67

CIVL 3137 45

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SLIDE 43

Standard Sizes of Processed Aggregate (ASTM D448)

GRAIN SIZE DISTRIBUTION GRAPH

10 20 30 40 50 60 70 80 90 100 1 10 100 GR AIN SIZE IN MILLIME TE RS PERCENT PASSING 1½" ¾" ⅜" 4 8 3" 16

5 7 57

CIVL 3137 46

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SLIDE 44

Standard Sizes of Processed Aggregate (ASTM D448)

GRAIN SIZE DISTRIBUTION GRAPH

10 20 30 40 50 60 70 80 90 100 1 10 100 GR AIN SIZE IN MILLIME TE RS PERCENT PASSING 1½" ¾" ⅜" 4 8 3" 16

57 3 357

CIVL 3137 47

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SLIDE 45

Standard Sizes of Processed Aggregate (ASTM D448)

GRAIN SIZE DISTRIBUTION GRAPH

10 20 30 40 50 60 70 80 90 100 1 10 100 GR AIN SIZE IN MILLIME TE RS PERCENT PASSING 1½" ¾" ⅜" 4 8 3" 16

67 4 467

CIVL 3137 48

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SLIDE 46

CIVL 3137 49

Example

20 40 60 80 100 0.01 0.1 1 10 100 Percent Passing Opening Size (mm)

1½" ¾"

3/8"

4 8 16 30 50 100 200

What is the most likely standard size number of this aggregate?

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SLIDE 47

CIVL 3137 50

Example

20 40 60 80 100 0.01 0.1 1 10 100 Percent Passing Opening Size (mm)

1½" ¾"

3/8"

4 8 16 30 50 100 200

What is the most likely standard size number of this aggregate?

95% passing ¾" sieve

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SLIDE 48
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SLIDE 49

CIVL 3137 52

Example

20 40 60 80 100 0.01 0.1 1 10 100 Percent Passing Opening Size (mm)

1½" ¾"

3/8"

4 8 16 30 50 100 200

What is the most likely standard size number of this aggregate?

10% passing No. 4 sieve

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SLIDE 50
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SLIDE 51

CIVL 3137 54

Example

20 40 60 80 100 0.01 0.1 1 10 100 Percent Passing Opening Size (mm)

1½" ¾"

3/8"

4 8 16 30 50 100 200

What is the most likely standard size number of this aggregate?

26% passing 3/8" sieve

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SLIDE 52