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Description: Research report with data tables and figures related to protocols developed in research co-sponsored by FHWA and PCA on incompatibility issues in concrete. Research resulted in a testing protocol to allow product manufacturers, concrete producers, contractors and owners to monitor their materials and concrete systems. The protocol is phased to allow relatively simple field tests to provide early warnings of potential problems, and central laboratory tests to support and confirm the field work. Tests conducted before beginning construction allows users to plan for changes in materials and environment. By monitoring materials with relatively simple field tests during construction, the users can detect when significant changes have occurred, indicating potential construction problems.
Unexpected interactions between otherwise acceptable ingredients in portland cement concrete are becoming increasingly common as cementitious systems become more and more complex and demands on the systems are more rigorous. Such incompatibilities are exhibited as: early stiffening or excessive retardation, uncontrolled early-age cracking, unstable or unacceptable air-void systems.
A number of test methods have been reviewed to assess their usefulness in detecting incompatibility early, thus preventing problems in pavements in the field. A protocol has been developed to allow product manufacturers, concrete producers, contractors and owners to monitor their materials and concrete systems. The protocol is phased to allow relatively simple field tests to provide early warnings of potential problems, and central laboratory tests to support and confirm the field work.
This is the last of three volumes. The initial two volumes in this series have been published under the following titles:
FHWA HRT-06-079, Identifying Incompatible Combinations of Concrete Materials: Volume I–Final Report (Taylor et al. 2006a).
FHWA HRT-06-080, Identifying Incompatible Combinations of Concrete Materials: Volume II–Test Protocol (Taylor et al. 2006b).
This document contains detailed charts and tables portraying data collected during the development of the protocols. Included are isothermal conduction calorimetry graphs, pore solution chemistry (including a report with additional explanation), ASTM C1581 ring shrinkage data, and foam drainage test data.
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