00235854

Component

http://onlinepubs.trb.org...s/hrr/1970/323/323-002.pdf

A STUDY OF QUALITY CONTROL OF ROCK SLOPE PROTECTION MATERIAL (RIPRAP) IS REPORTED. THE OBJECTIVES WERE TO DETERMINE WHAT ROCK PROPERTIES WERE IMPORTANT FOR SATISFACTORY SLOPE PROTECTION AND TO DEVELOP WORKABLE SPECIFICATIONS THAT WOULD PROVIDE SATISFACTORY QUALITY CONTROL WITH MINIMUM COST. AN EXTENSIVE FIELD EVALUATION OF ROCK SLOPE PROTECTION MATERIALS WAS PERFORMED, AND SAMPLES WERE OBTAINED FOR PHYSICAL TESTING. A SIGNIFICANT FINDING OF THIS VISUAL AND PHYSICAL EVALUATION WAS THAT THE 1964 CALIFORNIA STANDARD SPECIFICATIONS WERE TOO SEVERE AND RESULTED IN THE REJECTION OF SATISFACTORY ROCK. TEST METHODS EVALUATED AS POTENTIAL SPECIFICATIONS ARE SODIUM SULFATE SOUNDNESS, LOS ANGELES RATTLER, APPARENT SPECIFIC GRAVITY, ABSORPTION, DURABILITY INDEX, WET-DRY, FREEZE-THAW, RAPID ABRASION, PETROGRAPHY, X-RAY DIFFRACTION, DIFFERENTIAL THERMAL ANALYSIS, AND DURABILITY ABSORPTION RATIO (DAR). THE DAR COMBINES THE RESULTS OF EASILY PERFORMED AND INEXPENSIVE TESTS THAT ARE RELATIVELY ACCURATE IN PREDICTING PERFORMANCE AND THAT MEASURE COMPLEMENTARY PHYSICAL PROPERTIES. THE DAR CORRELATES WITH VISUAL EVALUATION 97 PERCENT OF THE TIME, AND THE CALIFORNIA DIVISION OF HIGHWAYS IS CONVERTING TO THIS SPECIFICATION FOR QUALITY CONTROL OF ROCK SLOPE PROTECTION MATERIAL. /AUTHOR/

Paper sponsored by Committee on Soil and Rock Properties and presented at the 49th Annual Meeting. 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

01410262

pp 6-13

1970

Highway Research Record

Print

Figures (6) ; References (1) ; Tables (2)

Absorption; Durability; Durability tests; Evaluation; Materials; Physical properties; Quality control; Ratios; Riprap; Rocks; Slopes; Soil stabilization; Specifications

Geotechnology; Highways; Marine Transportation; Materials

TRIS, TRB

May 3 1971 12:00AM

• APPLICATION OF PLASTICITY THEORY TO SLOPE STABILITY PROBLEMS
• COEFFICIENT OF EARTH PRESSURE AT REST AS RELATED TO SOIL PRECOMPRESSION RATIO AND LIQUID LIMIT
• CONTROL AND PERFORMANCE DURING CONSTRUCTION OF A HIGHWAY EMBANKMENT ON WEAK SOILS
• DYNAMIC BEHAVIOR OF EMBEDDED FOUNDATION-SOIL SYSTEMS
• GEOLOGIC SETTING OF LANDSLIDES ALONG SOUTH SLOPE OF PINE MOUNTAIN, KENTUCKY
• PHOTOELASTIC AND FINITE ELEMENT ANALYSIS OF EMBANKMENTS CONSTRUCTED OVER SOFT SOILS
• STABILITY OF SLOPES LOADED OVER A FINITE AREA
• STATISTICAL APPROXIMATION FOR CONSOLIDATION SETTLEMENT