Solving Corrosion Problems of Bridge Surfaces Could Save Billions: Report to the CongressGeneral Accounting Office, 1979 - 21 pagini |
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Pagina iii
... field performance data . ( See ch . 5. ) To improve the technology evaluation process , GAO recommends that the Secretary of Transpor- tation establish a formal long - term data col- lection and evaluation system for bridge deck ...
... field performance data . ( See ch . 5. ) To improve the technology evaluation process , GAO recommends that the Secretary of Transpor- tation establish a formal long - term data col- lection and evaluation system for bridge deck ...
Pagina 3
... field con- struction ) provided little protection against corrosion . Hence , it was concluded that special techniques were required to prevent early deterioriation of bridge decks . The study further demonstrated that application of ...
... field con- struction ) provided little protection against corrosion . Hence , it was concluded that special techniques were required to prevent early deterioriation of bridge decks . The study further demonstrated that application of ...
Pagina 4
... field of corrosion in concrete . 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 ...
... field of corrosion in concrete . 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 ...
Pagina 12
... Field evidence is available which shows that membranes / overlays placed over heavily con- taminated concrete have reduced the rate of deterioration . Since the chloride level is above that necessary to support corrosion , it is ...
... Field evidence is available which shows that membranes / overlays placed over heavily con- taminated concrete have reduced the rate of deterioration . Since the chloride level is above that necessary to support corrosion , it is ...
Pagina 15
... field performance . The Federal Highway Administration estab- lished national evaluation programs for the construction of experimental bridge deck protective systems . We were told that , in general , these National Experimen- tal and ...
... field performance . The Federal Highway Administration estab- lished national evaluation programs for the construction of experimental bridge deck protective systems . We were told that , in general , these National Experimen- tal and ...
Termeni și expresii frecvente
AGENCY COMMENTS Assistant Secretary better identify bridge bridge deck deterioration bridge deck problem bridge deck protective bridge decks needing bridge decks requiring BRIDGE DETERIORATION PROBLEMS bridge repair bridges so deteriorated chloride-contaminated bridge decks collection and evaluation construction CONTAMINATED BRIDGE DECKS contaminated decks cost COST-EFFECTIVE METHOD data retrieval program dated November 14 deck protective systems Department of Transportation District of Columbia eral Eschwege Evaluation Program existing bridge decks Federal Highway Administration Federal Highway Administration's Federal-aid system bridge fiscal year 1979 formal long-term data funds HEAVILY CONTAMINATED BRIDGE Highway Administration officials Highway Administration recognizes Highway officials identify bridge decks interstate bridge decks letter dated November long-term data collection Maryland minor repair versus number of bridges performance data portation potential benefit/cost ratio questionnaire rate of corrosion salt applications save billions Secretary for Administration SECRETARY OF TRANSPORTATION system bridge decks systems on bridge techniques tective systems U.S. General Accounting unprotected bridge decks
Pasaje populare
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.