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4 bedding and backfill, void fill, and bridge approaches; (2) for Describes materials and mixture proportions used in these applications, to define test methods and develop crite- laboratory program ria for the necessary properties of CLSM, including its corro- Summarizes results of tests on fresh properties, hard- sion potential and possible environmental impact; (3) to de- ened properties, and durability aspects of CLSM fine the relationships between the properties of CLSM and its Chapter 4, Field Evaluations of CLSM constituents; (4) to define field methods to monitor in-place Describes six field tests conducted throughout the properties of CLSM for construction acceptance; and (5) to United States prepare design criteria and construction guidelines for CLSM Summarizes efficacy of test methods and specifications to take advantage of its properties for backfill, utility bedding, in field applications void fill, and bridge approaches. Chapter 5, Conclusions and Suggested Research Summarizes key findings and conclusions from project Identifies topics and issues that deserve further atten- Overview of Report tion in future research The report is organized as follows: Appendices Appendix A, Corrosion Study (available in NCHRP Chapter 2, State of the Art and Current Practice Web-Only Document 116) Provides synthesis of current practice and available lit- Appendix B, Recommended Test Methods for CLSM erature on CLSM. Appendix C, Recommended Specifications for CLSM Describes materials, mixture proportions, applications, Appendix D, Recommended Practice for CLSM relevant properties of CLSM, and research needs Appendix E, Implementation Plan (available in NCHRP Chapter 3, Laboratory Testing Program Web-Only Document 116)