Solving Corrosion Problems of Bridge Surfaces Could Save Billions: Report to the Congress |
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Pagina v
... 15 Formal long - term data collection and evaluation system is needed Conclusion 15 16 Recommendation to the Secretary of Transportation 17 Agency comments 17 6 SCOPE OF REVIEW 18 APPENDIX I II States with moderate to very major bridge.
... 15 Formal long - term data collection and evaluation system is needed Conclusion 15 16 Recommendation to the Secretary of Transportation 17 Agency comments 17 6 SCOPE OF REVIEW 18 APPENDIX I II States with moderate to very major bridge.
Pagina 4
Because of the large potential saving of protecting , rather than replacing , the current inventory of structurally sound bridge decks , we reviewed the progress being made in applying protective systems to these existing bridges and ...
Because of the large potential saving of protecting , rather than replacing , the current inventory of structurally sound bridge decks , we reviewed the progress being made in applying protective systems to these existing bridges and ...
Pagina 12
It is the opinion of various Federal Highway Administra- tion officials , and the consensus of a 1976 project review conference , that this research would provide the capability to more accurately evaluate protective systems for new ...
It is the opinion of various Federal Highway Administra- tion officials , and the consensus of a 1976 project review conference , that this research would provide the capability to more accurately evaluate protective systems for new ...
Pagina 17
... by the Federal Highway Admin- istration . A program to produce a long - term data collection system for protective systems is scheduled to begin in fiscal year 1979 . CHAPTER 6 SCOPE OF REVIEW We interviewed officials at Federal 17.
... by the Federal Highway Admin- istration . A program to produce a long - term data collection system for protective systems is scheduled to begin in fiscal year 1979 . CHAPTER 6 SCOPE OF REVIEW We interviewed officials at Federal 17.
Pagina 18
CHAPTER 6 SCOPE OF REVIEW We interviewed officials at Federal Highway Administra- tion headquarters and field offices and reviewed records per- tinent to the premature bridge roadway deterioration problem . We also conducted interviews ...
CHAPTER 6 SCOPE OF REVIEW We interviewed officials at Federal Highway Administra- tion headquarters and field offices and reviewed records per- tinent to the premature bridge roadway deterioration problem . We also conducted interviews ...
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Termeni și expresii frecvente
additional APPENDIX applications Assistant Secretary begin bridge deck deterioration bridge deck problem cause CHAPTER chloride COMMENTS complete replacement concrete condition construction contaminated continue controlling copies corrosion cost cost-effective deterioration problem determine dollars effective efforts eral estimates evaluation Evaluation Program eventually example existing bridge decks expected expensive extent Federal Highway Administration Federal Highway Administration's Federal-aid system bridge field fiscal formal funds further heavily contaminated Highway Administration officials identify improve indicated installed lack later less limiting long-term data collection magnitude major measure membrane methods Michigan moderate modified moisture necessary needed overlay oxygen performance data portation potential premature prevent procedure progress protecting existing protective systems questionnaire rate of corrosion ratio recommends reinforcing steel removal repair Requests require restored result reviewed salt Secretary short-term situation solutions stopping studies surfaces techniques technologies tective systems tion Trans Transportation various Washington
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Pagina 19 - Montana, Nebraska, Nevada, New Jersey, New York, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania (for payment of temporary indebtedness), South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, and Wyoming.
Pagina i - Administration has found that some unprotected bridge decks require major repair within 5 to 10 years, and often must be replaced after 15 years of service. The major cause of this early deterioration is corrosion of the reinforcing steel bars in the bridge deck, brought about by chloride chemicals which are used to melt snow.
Pagina 3 - ... Various Parameters of Design and Construction." The purpose of this investigation is to provide administrators and designers with factual data on which to base decisions as to the type of protection to provide for bridge decks constructed in corrosive environments. The specific study objective is: to determine the relative time-to-corrosion of reinforcing steel embedded in concrete slabs, fabricated from various mix designs and construction procedures, when the slabs are subjected to periodic...
Pagina 7 - Administration study indicated that, if the 29,000 interstate bridge decks requiring minor repair today were neglected to the extent that they require moderate repair, the current repair cost of about $600 million would increase by an additional $4.4 billion. These estimates are in 1975 dollars.
Pagina ii - PSAD-79-10 later. The potential benefit/cost ratio of repairing and protecting an existing bridge deck needing only minor repair versus completely replacing the deck at a later date is 2.75 to 1.
Pagina i - Tear ShMl. Upon removal, the report cover date should be noted hereon PSAD-79-10 later.
Pagina 1 - Administration found that unprotected bridge decks receiving deicing chemicals require major repair within 5 to 10 years, and often must be replaced after only 15 years of service.
Pagina 8 - State funds is a major reason why bridge decks still in good condition are not being protected by a majority of the 32 States with a serious bridge deterioration problem.
Pagina 1 - Transportation officials requested the Transportation Research Board of the National Academy of Sciences to prepare a state-of-the-art report on the concrete bridge deck deterioration problem.