Solving Corrosion Problems of Bridge Surfaces Could Save Billions: Report to the Congress |
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Pagina ii
Numerous techniques are being investigated which may protect these bridge decks from further de- terioration . However , the Federal Highway Administration has not yet developed proven , cost - effective techniques for stopping the ...
Numerous techniques are being investigated which may protect these bridge decks from further de- terioration . However , the Federal Highway Administration has not yet developed proven , cost - effective techniques for stopping the ...
Pagina 3
The objective of this program was to deter- mine the relative time - to - corrosion of reinforcing steel em- bedded in concrete slabs fabricated with various concrete mixes , construction techniques , and special additives .
The objective of this program was to deter- mine the relative time - to - corrosion of reinforcing steel em- bedded in concrete slabs fabricated with various concrete mixes , construction techniques , and special additives .
Pagina 4
Early research also focused on developing techniques to determine the condition of existing bridge decks . In February 1974 , the Federal Highway Administration's report stated that the only way to be assured of permanent repair was to ...
Early research also focused on developing techniques to determine the condition of existing bridge decks . In February 1974 , the Federal Highway Administration's report stated that the only way to be assured of permanent repair was to ...
Pagina 11
... contaminated portions of the deck is expensive and , as a result , is not being implemented by the States . Numerous techniques have been suggested as pos- sibilities for protecting existing bridge decks from further deterioration .
... contaminated portions of the deck is expensive and , as a result , is not being implemented by the States . Numerous techniques have been suggested as pos- sibilities for protecting existing bridge decks from further deterioration .
Pagina 12
Without this research information , there is no sound method of determining which repair technique should be used for a given set of conditions . Need to quantify other variables supporting corrosion The objectives of the research ...
Without this research information , there is no sound method of determining which repair technique should be used for a given set of conditions . Need to quantify other variables supporting corrosion The objectives of the research ...
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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.