00213754

Component

https://onlinepubs.trb.or...bproceedings/10/10-010.pdf

AN INVESTIGATION OF THE DURABILITY OF CONCRETE AND CONCRETE AGGREGATES IN KANSAS IS REPORTED. LABORATORY AND FIELD INVESTIGATIONS REPORT OF DURABILITY AS AFFECTED BY: METHOD OF TESTING, SIZE AND SHAPE OF SPECIMENS, METHOD OF SAMPLING, CHARACTER OF AGGREGATE, QUALITY OF CEMENT PASTE, PERMEABILITY AND ABSORPTION AS A FACTOR IN DISTINTEGRATION, AND EFFECT OF WATER-PROOF COATING. AN ACCELERATED FREEZING AND THAWING TEST IS PRESENTED AS A MENAS OF TESTING THE RESISTANCE OF CONCRETE AND CONCRETE AGGREGATES TO WEATHERING. THE CONCRETE DURABILITY STUDY CONCLUDES THAT: (1) ALTERNATE FREEZING AND THAWING IS A VALUABLE METHOD OF STUDYING THE DURABILITY OF CONCRETE AND CONCRETE AGGREGATES, (2) THE DURABILITY OF CONCRETE IS GREATLY AFFECTED BY THE QUALITY OF THE CEMENT PASTE, (3) A WATER-CEMENT RATIO OF 0.8 OR MORE IS NOT LIKELY TO GIVE A CONCRETE ADEQUATE DURABILITY IF THE CONDITIONS OF EXPOSURE ARE SEVERE, (4) THE PROPER PLACING, HANDLING AND CURING OF THE CONCRETE ARE AS IMPORTANT AS THE MIX DESIGN, (5) WATERTIGHT LAYERS FORMED EITHER BY EXCESSIVE MANIPULATION, OR BY WASHCOATS, PLASTERS OR OTHER TREATMENTS, REDUCE THE RESISTANCE OF CONCRETE TO WEATHERING UNLESS THEY ARE PLACED ON THOSE PORTIONS OF THE STRUCTURE WHER WATER WOULD OTHERWISE ENTER, (6) THE USE OF UNSOUND AGGREGATE PRODUCES UNSOUND CONCRETE, THE RESISTANCE OF THE MORTAR TO DISINTEGRATION BEING ONLY SLIGHTLY EFFECTIVE IN PROTECTING THE AGGREGATE, AND (7) ANY AGGREGATE CONTAINING ABSORPTIVE CHERT SHOULD NOT BE USED UNTIL AFTER VERY CAREFUL INVESTIGATION.

Vol 10, pp 132-163, 22 FIG, 1 TAB. 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.

01490420

1931

Highway Research Board Proceedings

Digital/other

Absorption; Aggregates; Cement paste; Concrete; Concrete aggregates; Concrete curing; Durability; Field studies; Freeze thaw tests; Laboratory studies; Methodology; Permeability; Sampling; Testing; Water cement ratio; Weathering

Geotechnology; Highways; Materials

TRIS, TRB

Jun 1 1971 12:00AM

• COST ECONOMIES IN CONCRETE BRIDGES-A RESUME OF CURRENT STRUCTURAL RESEARCH
• DETERMINATION AND CLASSIFICATION OF THE IMPORTANT CHARACTERISTICS OF BITUMEN FOR USE IN SURFACE APPLICATIONS, MIXED IN PLACE AND SIMILAR ROAD SURFACES
• DISCUSSION ON DURABILITY OF CONCRETE
• EFFECT OF FLAT AND ELONGATED PARTICLES IN MINERAL AGGREGATES
• EXTENT OF DESIRABILITY FOR STATE CONTROL OF TRAFFIC REGULATION IN MUNICIPALITIES
• FILLERS AND CUSHION COURSES FOR BRICK AND BLOCK PAVEMENTS
• FINANCIAL RESPONSIBILITY OF MOTORISTS
• GENERAL DISCUSSION ON HIGHWAY TRAFFIC
• LAW OBSERVANCE AND ENFORCEMENT METHODS
• MAINTENANCE COSTS
• PROGRESS REPORT OF COMMITTEE ON CURING OF CONCRETE PAVEMENT SLABS
• PROGRESS REPORT OF COMMITTEE ON HIGHWAY FINANCE
• RECENT DEVELOPMENTS IN CONSTRUCTION METHODS AND APPLIANCES
• RELATION BETWEEN DURABILITY OF CONCRETE AND DURABILITY OF AGGREGATES
• REMOVAL OF ICE FROM PAVEMENTS
• REPAIR OF PAVEMENT SETTLEMENTS
• Report of Committee on Design
• REPORT OF COMMITTEE ON HIGHWAY TRANSPORTATION
• THE ACCIDENT-PRONE DRIVER
• THE DESIGN OF A CONCRETE MIXTURE
• THE RELATION OF CERTAIN FROST PHENOMENA TO THE SUBGRADE
• TRAFFIC CAPACITY
• TRAFFIC CONTROL MECHANISMS
• TRAFFIC SURVEY METHODS AND FORMS
• VEHICLE AND HIGHWAY MECHANICS AS RELATED TO TRAFFIC