High Performance Concrete Specifications and Practices for Bridges (2013) / Chapter Skim
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Pages 41-47
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From page 41... ...
41 Appendix A Survey Questionnaire The following survey for this synthesis was mailed in January 2012 to 50 U.S. state highway agencies and the District of Columbia to collect information about their specifications and practices for high performance concrete.
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42 Are your agency's special provisions for HPC prescriptive, performance-based, or a combination?
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43 12. In your agency's prescriptive specifications, which of the following characteristics are currently considered in developing the specifications for cast-in-place concrete bridge decks?
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44 What is the frequency of use of the following admixtures for cast-in-place concrete bridge decks? None 1 to 33% 34 to 67% 68 to 100% AASHTO M 194 Type A -- Water-reducing admixtures AASHTO M 194 Type B -- Retarding admixtures AASHTO M 194 Type C -- Accelerating admixtures AASHTO M 194 Type D -- Water-reducing and retarding admixtures AASHTO M 194 Type E -- Water-reducing and accelerating admixtures AASHTO M 194 Type F -- High range water-reducing admixtures AASHTO M 194 Type G -- High range water-reducing and retarding admixtures Corrosion inhibitors Shrinkage reducing admixtures Expansive components What length of wet curing does your agency currently specify for cast-in-place concrete bridge decks?
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45 Compressive strength > 6.0 ksi Modulus of elasticity Creep Shrinkage Other If other, please list. In your agency's prescriptive specifications, which of the following characteristics are currently considered in developing the specifications for precast, prestressed concrete beams and deck panels?
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46 What is the frequency of use of the following admixtures for precast, prestressed concrete bridge beams? None 1 to 33% 34 to 67% 68 to 100% AASHTO M 194 Type A -- Water-reducing admixtures AASHTO M 194 Type B -- Retarding admixtures AASHTO M 194 Type C -- Accelerating admixtures AASHTO M 194 Type D -- Water-reducing and retarding admixtures AASHTO M 194 Type E -- Water-reducing and accelerating admixtures AASHTO M 194 Type F -- High range water-reducing admixtures AASHTO M 194 Type G -- High range water-reducing and retarding admixtures Corrosion inhibitors Shrinkage reducing admixtures Expansive components What is the frequency of use of the following admixtures for precast, prestressed concrete deck panels?
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47 34. Are you willing to answer follow-up questions for this synthesis?
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