Concrete Technology for Transportation Applications (2019) / Chapter Skim
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Pages 145-161
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145 Responses to Survey Questionnaire A P P E N D I X B The following 40 state departments of transportation responded to the survey questionnaire: 1. Alabama (AL)
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146 Concrete Technology for Transportation Applications Questions and Responses 1. Are you the agency representative serving on AASHTO Committee on Materials and Pavements COMP)
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Responses to Survey Questionnaire 147 4. Please identify the most the common application(s)
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148 Concrete Technology for Transportation Applications 5. Please identify application(s)
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Responses to Survey Questionnaire 149 6. Please indicate, in your estimate, the number of projects where the technology/material has been used.
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150 Concrete Technology for Transportation Applications 7. Please indicate the range of service lives (years)
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Responses to Survey Questionnaire 151 What, in your opinion, are the most common problems, distresses or challenges, when using the technology/material? Technology Challenge 1 Challenge 2 Challenge 3 Challenge 4 SCC Familiarity of agency & construction personnel Segregation & other Q/C issues Proper form tightness Appropriate aggregate sizes UHSC Experience Q/C issues Cracking High cost HESC Agency familiarity Balancing F/T durability needs with early strength Maintain slump for consolidation and finishing.
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152 Concrete Technology for Transportation Applications Other Technologies Technology/ Material (state) Used For pavements, structures or both?
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Responses to Survey Questionnaire 153 EdenCrete (GA) Pavements Implemented More than 5 Increases strength and Durability Shrinkage reducing admixtures (IL)
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154 Concrete Technology for Transportation Applications Alternative deicers (NY) Both Experimental Multiple projects Cost effective deicing Alternative SCMs/additiv es (NY)
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Responses to Survey Questionnaire 155 Technology / Material (state) Specification (Yes, No)
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156 Concrete Technology for Transportation Applications Steel & synthetic fibers (MO) Yes Criteria on the use of fibers, determining fiber dosage Recycled concrete aggregate (MO)
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Responses to Survey Questionnaire 157 15. Agency action No.
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158 Concrete Technology for Transportation Applications Other responses: • Allow easy switch between approved fly ash sources. • Conduct research on feasibility of using rice hall ash.
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Responses to Survey Questionnaire 159 20. Select the most common replacement proportion of RCA for coarse aggregate in the concrete mix.
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160 Concrete Technology for Transportation Applications No specifications or construction guidelines available 23 Industry resistance 21 Not sufficient time available to be devoted to new technologies 16 Bad experience with construction or performance of the technology/material 13 Resistance to change or to explore new technologies 12 Weather conditions not permitting 5 Other responses: • Lack of experience by agency and local industry. • Concern about potential reduction in concrete mixture quality.
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Responses to Survey Questionnaire 161 Case Examples 24. The synthesis will include "Case Examples" of five agencies with extensive experience in new concrete technologies, and two other agencies with little or no experience with most technologies.
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