Author: Todd D. Hanson
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 23
Book Description
The Iowa DOT has been using blended cements in ternary mixes since 1999. Use of these supplementary cementitious materials gives concrete with higher strengths and much lower permeability. Use of these materials has been incorporated for use in High Performance Concrete (HPC) decks to achieve lower permeability and thus long term performance. Since we have been using these materials in paving, it would be informative to determine what concrete pavement properties are enhanced as related to high performance concrete. The air void system was excellent at a spacing factor of 0.0047 in (0.120 mm). AVA spacing factor results are much higher than the hardened air void analysis. Although only 3 samples were tested between the image analysis air content and the RapidAir457, there is pretty good agreement between those test methods. Air void analysis indicates that excessive vibration was not required to place the concrete. Vibration was well within the specification limits with an average of 6683 vpm's with a standard deviation of 461. Overall ride of the project was very good. The average smoothness for the project was 2.1 in/mile (33.8 mm/km). The International Roughness Index (IRI) was 81 in/mi (1.29 m/km). The compressive strength was 6260 psi (43.2 MPa) at 28 days and 6830 (47.1 MPa) at 56 days. The modulus of rupture by third point loading (MOR-TPL) tested at 28 days was 660 psi (4.55 MPa). The AASHTO T277 rapid chloride permeability results at 28 days using the Virginia cure method correlate fairly well with the 56 and 90 day results with standard curing. The Virginia cure method 28 day results were 2475 coulombs and the standard cure 56 and 90 day test results were 2180 and 2118, respectively.
Investigation of High Performance Concrete Pavement
Author: Todd D. Hanson
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 23
Book Description
The Iowa DOT has been using blended cements in ternary mixes since 1999. Use of these supplementary cementitious materials gives concrete with higher strengths and much lower permeability. Use of these materials has been incorporated for use in High Performance Concrete (HPC) decks to achieve lower permeability and thus long term performance. Since we have been using these materials in paving, it would be informative to determine what concrete pavement properties are enhanced as related to high performance concrete. The air void system was excellent at a spacing factor of 0.0047 in (0.120 mm). AVA spacing factor results are much higher than the hardened air void analysis. Although only 3 samples were tested between the image analysis air content and the RapidAir457, there is pretty good agreement between those test methods. Air void analysis indicates that excessive vibration was not required to place the concrete. Vibration was well within the specification limits with an average of 6683 vpm's with a standard deviation of 461. Overall ride of the project was very good. The average smoothness for the project was 2.1 in/mile (33.8 mm/km). The International Roughness Index (IRI) was 81 in/mi (1.29 m/km). The compressive strength was 6260 psi (43.2 MPa) at 28 days and 6830 (47.1 MPa) at 56 days. The modulus of rupture by third point loading (MOR-TPL) tested at 28 days was 660 psi (4.55 MPa). The AASHTO T277 rapid chloride permeability results at 28 days using the Virginia cure method correlate fairly well with the 56 and 90 day results with standard curing. The Virginia cure method 28 day results were 2475 coulombs and the standard cure 56 and 90 day test results were 2180 and 2118, respectively.
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 23
Book Description
The Iowa DOT has been using blended cements in ternary mixes since 1999. Use of these supplementary cementitious materials gives concrete with higher strengths and much lower permeability. Use of these materials has been incorporated for use in High Performance Concrete (HPC) decks to achieve lower permeability and thus long term performance. Since we have been using these materials in paving, it would be informative to determine what concrete pavement properties are enhanced as related to high performance concrete. The air void system was excellent at a spacing factor of 0.0047 in (0.120 mm). AVA spacing factor results are much higher than the hardened air void analysis. Although only 3 samples were tested between the image analysis air content and the RapidAir457, there is pretty good agreement between those test methods. Air void analysis indicates that excessive vibration was not required to place the concrete. Vibration was well within the specification limits with an average of 6683 vpm's with a standard deviation of 461. Overall ride of the project was very good. The average smoothness for the project was 2.1 in/mile (33.8 mm/km). The International Roughness Index (IRI) was 81 in/mi (1.29 m/km). The compressive strength was 6260 psi (43.2 MPa) at 28 days and 6830 (47.1 MPa) at 56 days. The modulus of rupture by third point loading (MOR-TPL) tested at 28 days was 660 psi (4.55 MPa). The AASHTO T277 rapid chloride permeability results at 28 days using the Virginia cure method correlate fairly well with the 56 and 90 day results with standard curing. The Virginia cure method 28 day results were 2475 coulombs and the standard cure 56 and 90 day test results were 2180 and 2118, respectively.
High-early-strength High-performance Concrete for Rapid Pavement Repair
Author: Nader Ghafoori
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 188
Book Description
In the construction industry, high early age strength concrete is concrete that achieves a loading strength in a matter of hours to days. Due to the accelerated strength gain of high early age strength concrete it is expected to continue to gain strength after the the traffic load is introduced. The target of this investigation is high early age strength concrete for the purposes of road and bridge deck repairs.
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 188
Book Description
In the construction industry, high early age strength concrete is concrete that achieves a loading strength in a matter of hours to days. Due to the accelerated strength gain of high early age strength concrete it is expected to continue to gain strength after the the traffic load is introduced. The target of this investigation is high early age strength concrete for the purposes of road and bridge deck repairs.
An investigation toward performance-oriented specifications for Portland cement concrete pavement
Author: Stefan Friederich Gräter
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 590
Book Description
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 590
Book Description
High Performance Concrete Pavements
Author:
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 190
Book Description
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 190
Book Description
High Performance Concrete Pavement
Author: Todd E. Hoerner
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 46
Book Description
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 46
Book Description
High Performance Concrete Pavement
Author: John B. Wojakowski
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 36
Book Description
Subbase and Subgrade Performance Investigation for Concrete Pavement
Author: Youn su Jung
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 98
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 98
Book Description
High Performance Concretes
Author: Paul Zia
Publisher:
ISBN:
Category : Fiber-reinforced concrete
Languages : en
Pages : 262
Book Description
This state-of-the-art report summarizes the results of an extensive search and review of available literature on the mechanical properties of concrete, with particular reference to high performance concrete for highway applications. Included in the review and discussion are the behavior of plastic concrete as well as the strength and deformation characteristics of hardened concrete. Both short-term and long-term effects are considered. Based on the review of the available information, research needs are identified. It is concluded that much research is needed to develop data on the strength and durability properties of concrete which develops high strength, particularly very early strength.
Publisher:
ISBN:
Category : Fiber-reinforced concrete
Languages : en
Pages : 262
Book Description
This state-of-the-art report summarizes the results of an extensive search and review of available literature on the mechanical properties of concrete, with particular reference to high performance concrete for highway applications. Included in the review and discussion are the behavior of plastic concrete as well as the strength and deformation characteristics of hardened concrete. Both short-term and long-term effects are considered. Based on the review of the available information, research needs are identified. It is concluded that much research is needed to develop data on the strength and durability properties of concrete which develops high strength, particularly very early strength.
Investigation of Field Performance of Continuously-reinforced Concrete Highway Pavement
Author: Richard Herman Nixdorf
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
Book Description
Performance Study of Continuously Reinforced Concrete Pavement on I-95
Author: Gopal N. Shah
Publisher:
ISBN:
Category : Interstate 95
Languages : en
Pages : 260
Book Description
Publisher:
ISBN:
Category : Interstate 95
Languages : en
Pages : 260
Book Description