Concrete Technology for Transportation Applications (2019)

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126 Survey Questionnaire A P P E N D I X A The survey below was mailed electronically to 50 state departments of transportation using SurveyGizmo software. The purpose of the survey was to obtain information on the use of concrete technologies for transportation applications and practices by the states. Responses were received from 40 states. NCHRP SYNTHESIS 49-09 CONCRETE TECHNOLOGY FOR TRANSPORTATION APPLICATIONS SURVEY QUESTIONNAIRE KEY DEFINITIONS (for the purpose of this survey) • COMP – AASHTO Committee on Materials and Pavements • SCC – Self-consolidating concrete – SCC is highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. • UHSC – Ultra-high strength concrete – UHSC is concrete with strength equal to or higher than 10,000 psi.

Survey Questionnaire 127 • RCC – Roller compacted concrete – RCC is a very dry concrete mix placed with special or asphalt paves and is compacted with steel rollers. • UHPC – Ultra-high-performance concrete – UHPC is an advanced cementitious material composed of high cement and silica fume contents, very low w/c, high dosage of steel fibers and optimized gradation of fine aggregate. UHPC has been used in connections between prefabricated bridge elements. • ICC – Internally cured concrete – ICC is concrete with saturated lightweight aggregates or polymer particles as replacements of conventional aggregate to provide internal curing, and supplements externally applied curing. • TCMC – Temperature control of mass concrete – TCMC is a process to mitigate the impact of temperature in mass concrete members. • LC – Lightweight concrete – LC is concrete using lightweight aggregates as partial or full replacement of normal-weight aggregate. • LCC – Lightweight cellular/foamed concrete – In LCC, foaming agent is used to expand the volume of cement slurry or mortar and is used as a filler material. • PCP – Precast concrete pavement – PCP is composed of prefabricated concrete panels that are assembled on-site and used for new construction, overlay, and/or repairs. • PRHC – Proprietary rapid hardening concrete repair materials – These are patching materials used for rapid repair of pavements and bridges. • HESC – High-early strength concrete – HESC is used in accelerated construction, repair and rehabilitation. It normally has short setting and hardening times. • PC – Pervious concrete – PC is concrete with little or no fine aggregate used in parking areas, base layers, some streets and in edge drains.

128 Concrete Technology for Transportation Applications • PolyC – Polymer concrete – PolyC is polymer resin and aggregate without portland cement. It is used in patching and overlays and can be placed and then opened to traffic swiftly. It provides high wear resistance. • RCA – Recycled concrete aggregate. • LMC – Latex modified concrete – LMC is polymer modified portland cement–based material used for patching and overlays.

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138 Concrete Technology for Transportation Applications Has your agency evaluated or implemented other new or promising concrete technologies/materials. 11.

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