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OCR for page 205
205 was determined for several combinations of substrate treatment and overlay (latex-modified concrete, low- slump dense concrete, and polymer concrete) after scar- ification was simulated. Treatments of the concrete with methyl methacrylate consistently gave superior perform- ance with respect to durability and corrosion resistance provided the concrete was dry prior to impregnation. Two impregnated inhibitors (calcium nitrite and a commercial rust inhibitor) and a hydrophobic silane improved cor- rosion resistance, but durability under freezing and thaw- ing conditions was decreased. Sulfur gave variable or poor results. A new technique for impregnation was also de- veloped, based on deeply grooving the concrete to facil- itate drying and the impregnation process. Research has been completed, and the final report has been published as: NCHRP Report 257, "Long-Term Rehabilitation of Salt-Contaminated Bridge Decks." The published report contains an appendix detailing the deep grooving technique as a means to facilitate deep polymer impregnation, i.e., impregnation to a depth to include the encapsulation of the top reinforcing steel in bridge decks. An agency "Supplement to NCHRP 257" containing sev- eral additional appendixes was distributed to NCHRP sponsors only. It is available to others on a loan basis or a purchase basis for the cost of reproduction (see final page of this section for ordering information). The ap- pendixes in the supplemental report detail the laboratory investigations and present the development and use of an economic model for comparing cost-e~ectiveness of var- ious alternatives. AREA 19: FINANCE Project 19-1 FY '68 Budgeting for State Highway Departments Research Agency: Principal Invest.: Elective Date: Completion Date: Funds: Ernst & Ernst F. W. Hinck, Jr. September 5, 1967 September 4, 1968 $45,000 Although budget plans of varying effectiveness now exist in the several State highway departments, there is no indication that highway administration recognizes and utilizes the budget process to its full potential. Research is needed with the long-range objective of devising a concisely defined framework of budget systems, together with detailed documentation for implementing policies and procedures. To meet this need, the research- ers analyzed the organization plans and funding arrange- ments controlling State highway departments. They determined in detail the prerequisites which must be sat- isfied and the problems requiring resolution for elective State highway budgetary systems to be instituted. Doc- umented recommendations were developed for devising a concise universal State highway budgeting system with detailed aids for implementing appropriate policies and procedures. Research has been completed. The project report will not be published in the regular NCHRP report series, but the essential findings from the report have been published in NCHRP Research Results Digest 20. Project 19-2(1) FY '69 Develop Performance Budgeting System to Serve Highway Maintenance Management Research Agency: Booz . Allen & Hamilton Principal Invest.: H. L. Wilsey Elective Date: September 2, 1968 Completion Date: October 31, 1968 Funds: $6,000 With highway maintenance expenditures rapidly in- creasing due to completion of the Interstate System, rising traffic volumes, trends toward higher standards of phys- ical maintenance, and more traffic services, it becomes increasingly important that maintenance operations be based on reasonable and effective maintenance budgets. The scope of this project was to develop independent work plans to be used as the research plan for the second- phase work. The work plan has been received but will not be published. Refer to Project 19-2~4) for description of the over-all project objectives and details of Phase II of this study. Project 19-2~2) FY '69 Develop Performance Budgeting System to Serve Highway Maintenance Management Research Agency: Principal Invest.: Effective Date: Completion Date: Funds: Ernst & Ernst F. W. Hinck, Jr. September 2, 1968 October 31, 1968 $6,000 With highway maintenance expenditures rapidly in- creasing due to completion of the Interstate System, rising traffic volumes, trends toward higher standards of phys- ical maintenance, and more traffic services, it becomes increasingly important that maintenance operations be based on reasonable and effective maintenance budgets. The scope of this project was to develop independent work plans to be used as the research plan for the second- phase work. The work plan has been received but will not be published. Refer to project 19-2~4) for description of the over-all project objectives and details of Phase II of this study.