00205818

Component

https://onlinepubs.trb.or...bproceedings/11/11-016.pdf

INVESTIGATIONS OF STEEL REINFORCEMENT CARRIED ON BY THE HIGHWAY RESEARCH BOARD, 1924-1925, DISCLOSED BENEFITS FURNISHED BY REINFORCEMENT IN CONCRETE PAVEMENTS NOT READILY EXPLAINABLE BY EXISTING KNOWLEDGE ON REINFORCED CONCRETE. SUBSEQUENT STUDY HAS INDICATED THAT SOME OF THE BENEFITS FURNISHED BY REINFORCEMENT ARE DUE TO THE INFLUENCE IT EXERTS UPON THE INTERNAL STRESSES AND OTHER FACTORS WHICH AFFECT THE STRENGTH AND DURABILITY OF CONCRETE. IN THIS REPORT, THE MORE OR LESS INTRICATE PHENOMENA OCCURRING, BOTH DURING AND SUBSEQUENT TO THE HARDENING PERIOD OF CONCRETE, ARE BRIEFLY ANALYZED IN AN EFFORT TO EXPLAIN THESE BENEFITS. WHEN FIRST DEPOSITED ON THE SUBGRADE IN THE PLASTIC STATE, THE CONCRETE MAY SHRINK DUE TO LOSS OF MOISTURE AND SOLUTION OF CEMENT CONSTITUENTS. AFTER HARDENING IT MAY: SWELL DUE TO MOISTURE ABSORPTION; SHRINK DUE TO MOISTURE LOSS; EXPAND DUE TO RISE IN TEMPERATURE; CONTRACT DUE TO DROP IN TEMPERATURE; WARP DUE TO TEMPERATURES OR MOISTURE CONTENTS IN THE TOPS OF THE SLABS DIFFERING FROM THOSE IN THE BOTTOMS OF THE SLABS; DISTORT DUE TO NON-UNIFORM SUBGRADE SUPPORT; DEFLECT DUE TO TRAFFIC LOADS; OR BE SUBJECTED TO THE DISINTEGRATING INFLUENCE OF FROST OR OTHER DETRIMENTAL PHYSICAL OR CHEMICAL ACTION. THE FUNCTIONS OF STEEL REINFORCEMENT WITH RESPECT TO THE STRESSES CAUSED BY THESE PHENOMENA ARE EXPLAINED. /AUTHOR/

Vol 11, Pt 1, PP 271-311, 31 FIG, 1 TAB, 23 REF. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01490418

1932

Highway Research Board Proceedings

Digital/other

Base course (Pavements); Concrete; Concrete hardening; Concrete pavements; Deflection; Durability; Frost; Hardness; Material reinforcement; Moisture content; Shrinkage; Strength of materials; Stresses; Subgrade (Pavements); Temperature; Warpage

Highways; Pavements

TRIS, TRB

Jun 1 1971 12:00AM

• A NEW THEORY OF FROST HEAVING
• DISCUSSION ON FROST HEAVING
• DISCUSSION ON LOW COST BRIDGES
• ECONOMICS OF LOW COST BRIDGES
• ECONOMICS OF LOW COST HIGHWAY BRIDGES
• ECONOMICS OF LOW COST HIGHWAY BRIDGES
• FACTORS AFFECTING VOLUME CHANGES IN CONCRETE AND THEIR SIGNIFICANCE IN DESIGN
• FIELD EXPERIMENTS IN SUBGRADE DRAINAGE AND TREATMENT
• FIELD METHODS FOR MEASURING TIRE WEAR
• Fillers and Bedding Courses for Brick Pavements
• LOAD LIMITATIONS ON HIGHWAYS
• LOW COST STEEL HIGHWAY-BRIDGES
• REPORT ON CULVERT INVESTIGATION
• REPORT ON STATE CONTROL OF TRAFFIC
• REPORT ON TRAFFIC LAW OBSERVANCE AND ENFORCEMENT METHODS
• REPORT ON VEHICLE AND HIGHWAY MECHANICS AS RELATED TO TRAFFIC
• RESISTANCE OF CONCRETE TO FROST ACTION AS AFFECTED BY THE WATER-CEMENT RATIO
• SOME PRINCIPLES OF SOIL SURVEYING AND SOIL MAPPING FOR ROAD PURPOSES
• TAXATION AND EXPENDITURES IN THE STATE OF WISCONSIN
• THE AIR RESISTANCE OF MOTOR VEHICLES
• THE ECONOMICS OF LOW COST BRIDGES
• THE EFFECT OF HOT CEMENT ON TIME OF SET AND WORKABILITY OF CONCRETE
• THE EFFECTIVENESS OF CALCIUM CHLORIDE AS A DUST PALLIATIVE AND ITS VALUE TO GENERAL ROAD MAINTENANCE
• THE SIGNIFICANCE OF SODIUM SULFATE AND FREEZING AND THAWING TESTS OF MINERAL AGGREGATES
• TRAFFIC CAPACITY
• TREATMENT OF ICY PAVEMENTS
• USE OF CONCRETE AS AN ECONOMIC HIGHWAY BRIDGE MATERIAL
• VOLUME CHANGES IN CONCRETE SLABS IN THE FIELD