Supplementary Cementitious Materials

Dr. Safeer AbbasAssistant Professor

Civil Engineering DepartmentUET Lahore, Pakistan

Supplementary Cementing Material2

• A material, when used in conjunction with portland cement, contributes to the properties of concrete through hydraulic and/or pozzolanic reaction.

• Fly ash, Silica fume, Slag and natural pozzolans

Supplementary Cementing Material3

Pozzolanic Reaction: Effect 14

Pozzolanic Reaction: Effect 15

Pozzolanic Reaction: Effect 16

Pozzolanic Reaction: Effect 27

Physical filler effect

Silica Fume (SF)8

Very fine non-crystalline silica produced in electric arc furnaces as a byproduct of the production of elemental silicon or alloys containing silicon; also known as condensed silica fume or microsilica.

Silica Fume9

Silica Fume Product Forms10

Silica Fume11

Silica Fume Colors12

Silica Fume Grain Size13

Silica Fume: Physical Properties14

Comparison of Silica Fume15

Reduction in CH with Silica Fume16

Strength with Silica Fume (SF)17

Durability Improvements with Silica Fume18

Durability Improvements with Silica Fume19

Silica Fume: Chloride Penetration20

Silica Fume Shotcrete21

Silica Fume increases Workability22

Fly Ash23

Specifications and Classes of Fly Ash24

Microstructure of Fly Ash25

Filler effect of Fly Ash26

Hydration Products of Cementing Binders 27

Fineness of Fly Ash28

Pozzolanic Activity of Fly Ash29

Composition of Fly Ash30

Effect of Fly Ash on Workability31

Typical Concrete Bleeding Curve32

Effect of Fly Ash on Pumpability33

Effect of Fly Ash on Compressive Strength34

Permeability with Fly Ash35

Chloride Diffusion with Fly Ash36

Improved Durability Properties37

Slag38

Ground Granulated Blast Furnace Slag39

Specification and Grade of Slag40

SEM image of Slag41

Effect of Slag on Workability42

Mechanical Properties using Slag43

Strength development with Slag44

Natural Pozzolans45

Natural Pozzolans46

Natural Pozzolans: Rice Husk Ash (RHA)47

Effect of RHA on Strength48

Effect of RHA on Chloride Penetration49

Chemical Analysis of Supplementary Materials50

Questions and Assignments51

Discuss various types of supplementary materials available in Pakistan and its Characteristics. (Note: Put colour pictures)

Discuss properties of rice husk effects on concrete

Report and Power point Presentation Need to submit in GroupDue date: 16-09-2014