Michael Sprinkel - Academia.edu (original) (raw)
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This paper describes the installation and condition of the first two very-early-strength latex mo... more This paper describes the installation and condition of the first two very-early-strength latex modified concrete (LMC-VE) overlays constructed for the Virginia Department of Transportation. The overlays were prepared with a special blended cement rather than the Type I/II cement used in the conventional latex-modified concrete (LMC) overlay. LMC-VE mixture proportions, installation equipment, and procedures are similar to those used for conventional LMC overlays. However, when working with LMC-VE, the contractor must work faster because the concrete loses slump rapidly and the curing period is approximately 3 rather than 72 hours.
Transportation Research Record Journal of the Transportation Research Board, Feb 2, 2015
Concrete Construction Engineering Handbook, 2008
Concrete Construction Engineering Handbook, 2008
This paper describes the installation and condition of the first two very-early-strength latex mo... more This paper describes the installation and condition of the first two very-early-strength latex modified concrete (LMC-VE) overlays constructed for the Virginia Department of Transportation. The overlays were prepared with a special blended cement rather than the Type I/II cement used in the conventional latex-modified concrete (LMC) overlay. LMC-VE mixture proportions, installation equipment, and procedures are similar to those used for conventional LMC overlays. However, when working with LMC-VE, the contractor must work faster because the concrete loses slump rapidly and the curing period is approximately 3 rather than 72 hours.
Transportation Research Record Journal of the Transportation Research Board, Feb 2, 2015
Publication of American Concrete Institute, 2003
Final Report Feb 1977 Nov 1981 Virginia Highway and Transportation Research Council Charlottesville, Nov 1, 1981
The experience of the Virginia Department of Highways and Transportation with the use of high ran... more The experience of the Virginia Department of Highways and Transportation with the use of high range water reduced (HRWR) concrete is described as well as the installation of the HRWR concrete in two pavements and four bridge decks. The results of evaluative tests are included along with recommendations concerning the further use of HRWR concrete. On the average the HRWR concrete placed in the field with conventional equipment was properly consolidated and controlled. However, because of the unanticipated variability of the concrete, portions of the concrete exhibited inadequate consolidation, segregated mixture components, improperly entrained air, shrinkage cracks, and poor finishes. Specimens subjected to cycles of freezing and thawing showed low durability factors that were attributed to an unsatisfactory air void system. Subsequent laboratory work revealed that HRWR admixtures satisfied the requirements of ASTM C494.
Transportation Research Record, 1978
Transportation Research Record, 1991
Transportation Research Record, 1983
Transportation Research Record, 1993
15. Supplementary Notes: This project was financed with federal Part II State Planning and Resear... more 15. Supplementary Notes: This project was financed with federal Part II State Planning and Research (SPR) funds for an estimated total project cost of $27,636. 16. Abstract:
Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of wa... more Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, some overlays have performed well for more than 30 years whereas others have cracked and delaminated before the overlay was opened to traffic. Shrinkage of the concrete is the most common cause of cracking in overlays. The use of Type K (expansive) cement should increase the probability that concrete overlays with minimal cracks will be constructed.
Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of wa... more Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, some overlays have performed well for more than 30 years whereas others have cracked and delaminated before the overlay was opened to traffic. The use of performance specifications should increase the probability that concrete overlays will be constructed with high bond strengths and minimal cracks and will perform well for many years.
This paper describes the installation and condition of the first two very-early-strength latex mo... more This paper describes the installation and condition of the first two very-early-strength latex modified concrete (LMC-VE) overlays constructed for the Virginia Department of Transportation. The overlays were prepared with a special blended cement rather than the Type I/II cement used in the conventional latex-modified concrete (LMC) overlay. LMC-VE mixture proportions, installation equipment, and procedures are similar to those used for conventional LMC overlays. However, when working with LMC-VE, the contractor must work faster because the concrete loses slump rapidly and the curing period is approximately 3 rather than 72 hours.
Transportation Research Record Journal of the Transportation Research Board, Feb 2, 2015
Concrete Construction Engineering Handbook, 2008
Concrete Construction Engineering Handbook, 2008
This paper describes the installation and condition of the first two very-early-strength latex mo... more This paper describes the installation and condition of the first two very-early-strength latex modified concrete (LMC-VE) overlays constructed for the Virginia Department of Transportation. The overlays were prepared with a special blended cement rather than the Type I/II cement used in the conventional latex-modified concrete (LMC) overlay. LMC-VE mixture proportions, installation equipment, and procedures are similar to those used for conventional LMC overlays. However, when working with LMC-VE, the contractor must work faster because the concrete loses slump rapidly and the curing period is approximately 3 rather than 72 hours.
Transportation Research Record Journal of the Transportation Research Board, Feb 2, 2015
Publication of American Concrete Institute, 2003
Final Report Feb 1977 Nov 1981 Virginia Highway and Transportation Research Council Charlottesville, Nov 1, 1981
The experience of the Virginia Department of Highways and Transportation with the use of high ran... more The experience of the Virginia Department of Highways and Transportation with the use of high range water reduced (HRWR) concrete is described as well as the installation of the HRWR concrete in two pavements and four bridge decks. The results of evaluative tests are included along with recommendations concerning the further use of HRWR concrete. On the average the HRWR concrete placed in the field with conventional equipment was properly consolidated and controlled. However, because of the unanticipated variability of the concrete, portions of the concrete exhibited inadequate consolidation, segregated mixture components, improperly entrained air, shrinkage cracks, and poor finishes. Specimens subjected to cycles of freezing and thawing showed low durability factors that were attributed to an unsatisfactory air void system. Subsequent laboratory work revealed that HRWR admixtures satisfied the requirements of ASTM C494.
Transportation Research Record, 1978
Transportation Research Record, 1991
Transportation Research Record, 1983
Transportation Research Record, 1993
15. Supplementary Notes: This project was financed with federal Part II State Planning and Resear... more 15. Supplementary Notes: This project was financed with federal Part II State Planning and Research (SPR) funds for an estimated total project cost of $27,636. 16. Abstract:
Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of wa... more Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, some overlays have performed well for more than 30 years whereas others have cracked and delaminated before the overlay was opened to traffic. Shrinkage of the concrete is the most common cause of cracking in overlays. The use of Type K (expansive) cement should increase the probability that concrete overlays with minimal cracks will be constructed.
Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of wa... more Hydraulic cement concrete overlays are usually placed on bridges to reduce the infiltration of water and chloride ions and to improve skid resistance, ride quality, and surface appearance. Constructed in accordance with prescription specifications, some overlays have performed well for more than 30 years whereas others have cracked and delaminated before the overlay was opened to traffic. The use of performance specifications should increase the probability that concrete overlays will be constructed with high bond strengths and minimal cracks and will perform well for many years.