Laboratory testing and field experience have shown that highway concrete should be properly air entrained to resist the action of freezing and thawing, particularly in wet climates. Several gaps in the state of the knowledge still exist.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 961: Entrained Air-Void Systems for Durable Highway Concrete addresses these gaps and, more specifically, investigates innovative test methods for effectively characterizing the air system in fresh concrete and identifying the characteristics of the air-void system that are related to the performance of field concrete under freeze-thaw conditions.
Appendices A –G provide further details on the different aspects of the research performed for this project.
• Appendix A: Test: Matrix for Laboratory Mixtures
• Appendix B: Petrographic Analysis Report
• Appendix C: Appendix C Data Obtained from Testing Concrete Mixtures Produced in the Laboratory
• Appendix D: Appendix D Flatbed Scanner Threshold Optimization Details and Test Results
• Appendix E: Clustering Analysis Test Results
• Appendix F: Microcomputer Control for AASHTO T 161 “A” Freeze–Thaw
• Appendix G: Data Obtained During F-T Testing
Table of Contents |
skim chapter | |
|---|---|---|
| Front Matter | i-viii | |
| Chapter 1 - Introduction | 1-2 | |
| Chapter 2 - Background | 3-10 | |
| Chapter 3 - Experimental Program | 11-62 | |
| Chapter 4 - Guidance on Protocols for Testing and Analysis | 63-65 | |
| Chapter 5 - Summary and Recommendations for Research | 66-67 | |
| References | 68-71 | |
| Appendices A-G | 72-74 | |
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