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FACTOR AFFECTING WORKABILITY AND STRENGTH OF CONCRETE GONZALES, MEL HARVEY A. COLLEGE OF ENGINEERING DLSU
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FACTOR AFFECTING WORKABILITY AND STRENGTH OF CONCRETE
GONZALES MEL HARVEY ACOLLEGE OF ENGINEERING
DLSU
WORKABILITY
A general term to describe the properties of fresh concrete
bull Consistency (or fluidity)--describes the ease of concrete flowbull Cohesiveness--describes the ability to keep concrete uniformity
(no concentration of a single component)bull Homogeneity refers to stable distribution of cement aggregate
and water and resistance to segregation
Workability-Factors Affecting Workability Water
Content
bull Extra water can lubricate the particles in mixture the more the water the easier the flowing However too much water will cause segregation
bull WC increase
bull Fluidity increase
Workability-Factors Affecting Workability
Aggregate
bull Aggregatecement ratiobull 1048711Fine aggregateCoarse aggregatebull 1048711Maximum aggregate sizebull 1048711Aggregate shape and texture
Workability-Factors Affecting Workability
Cement
bull FinenessFluidity decrease With fineness increase bull 1048711Cement Content Lubrication effect of paste
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
WORKABILITY
A general term to describe the properties of fresh concrete
bull Consistency (or fluidity)--describes the ease of concrete flowbull Cohesiveness--describes the ability to keep concrete uniformity
(no concentration of a single component)bull Homogeneity refers to stable distribution of cement aggregate
and water and resistance to segregation
Workability-Factors Affecting Workability Water
Content
bull Extra water can lubricate the particles in mixture the more the water the easier the flowing However too much water will cause segregation
bull WC increase
bull Fluidity increase
Workability-Factors Affecting Workability
Aggregate
bull Aggregatecement ratiobull 1048711Fine aggregateCoarse aggregatebull 1048711Maximum aggregate sizebull 1048711Aggregate shape and texture
Workability-Factors Affecting Workability
Cement
bull FinenessFluidity decrease With fineness increase bull 1048711Cement Content Lubrication effect of paste
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
Workability-Factors Affecting Workability Water
Content
bull Extra water can lubricate the particles in mixture the more the water the easier the flowing However too much water will cause segregation
bull WC increase
bull Fluidity increase
Workability-Factors Affecting Workability
Aggregate
bull Aggregatecement ratiobull 1048711Fine aggregateCoarse aggregatebull 1048711Maximum aggregate sizebull 1048711Aggregate shape and texture
Workability-Factors Affecting Workability
Cement
bull FinenessFluidity decrease With fineness increase bull 1048711Cement Content Lubrication effect of paste
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
Workability-Factors Affecting Workability
Aggregate
bull Aggregatecement ratiobull 1048711Fine aggregateCoarse aggregatebull 1048711Maximum aggregate sizebull 1048711Aggregate shape and texture
Workability-Factors Affecting Workability
Cement
bull FinenessFluidity decrease With fineness increase bull 1048711Cement Content Lubrication effect of paste
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
Workability-Factors Affecting Workability
Cement
bull FinenessFluidity decrease With fineness increase bull 1048711Cement Content Lubrication effect of paste
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
Workability-Factors Affecting Workability
Admixtures
bull Air entraining agent
bull -Pozzolanic admixtures
bull Superplasticizers
bull --release water retarding air entraining effect
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
Workability-Factors Affecting Workability
Temperaturebull Can influence the hydration rate and water
loosing ratebull Temperature increasebull Workability decrease
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
SLUMP TEST
Measures workability
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
RHEOMETER
measures yield stress and plastic viscosity
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
FACTOR AFFECTING STRENGTH
bull CONCRETE POROSITY
bull WATER CEMENT RATIO
bull SOUNDNESS OF THE AGGREGATE
bull AGGREGATE ndash PASTE BOND
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
DUCTAL
bull is an innovative technology which covers a family of ultra-high performance concretes with exceptional characteristics in terms of mechanical resistance (compressive strengths up to 200 MPa flexural tensile strength beyond 40 MPa) durability abrasion resistance and resistance against chemical and environmental attack (freeze and thaw salt water etc)
bull This new technology permits the development of innovative solutions which are competitive offer faster construction require less maintenance and have a reduced impact on the environment
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
DUCTAL
bull it is significantly stronger than normal concrete Compressive strengths range between 20000 to 30000 psi (150 to 200 MPa) compared to 3000 to 7000 psi (20 to 50 MPa) for normal concrete and flexural strengths range between 3000 to 7000 psi compared to 500 to 1000 psi (3 to 7 MPa) for normal concrete
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
REFERENCES
bull WORKABILITY AND QUALITY CONTROL OF CONCRETE BY G H TATTERSALL
bull M Lepech and VC Li Bridge Decks in Michigan Go Jointless in Civil amp Environmental Engineering Newsletter for Alumni and Friends University of Michigan Ann Arbor
