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Executive Summary
Pages 1-10

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From page 1...
... Reinforced concrete can then be considered! a "fiber-reinforcecI" composite, with the rebar acting as the "fiber." One fundamental difference, however, between conventional concrete and other engineering composites is that the composition ant]
From page 2...
... The objectives of the NRC study that produced this report were to look beyond near-term clevelopments in concrete technology to identify R&D opportunities in innovative, nonconventional materials and processes that have the potential to accelerate the construction process, improve the durability of highway pavement and bridges, and enhance the serviceability and longevity of new construction under adverse conditions. Meeting even one of these three objectives could save billions of dollars in construction and maintenance costs.
From page 3...
... POTENTIAL MATRIX MATERIALS AND THEIR SYNTHESIS The major conclusion and recommendation of the committee regarding potential matrix materials and their synthesis is that a sustained R&D effort is required to obtain a thorough understanding of the development ant! behavior of the cement matrix ant!
From page 4...
... ; (2) use the basic calcium oxide and silica in conventional Portland cement in conjunction with recyclecl or by-product materials that aIreacly contain a substantial amount of aciclic monomer (e.g., glass, blast-furnace slag, fly ash, silica fume)
From page 5...
... The committee recommends that research be conducted on the application of these materials to maintaining more constant hydration reaction conditions. Few techniques are currently available to control the temperature of the gel network formation reaction.
From page 6...
... REINFORCEMENT AND LAYERED STRUCTURES The committee recommends that concrete reinforcement R&D focus on an integrated concrete system of component materials, reinforcements, and multiple reinforcing phases. A potential design for a nonconventional concrete system would be a layered structure.
From page 7...
... scare-up possibilities to attain acceptable performance and required amounts from novel process plants for expected construction scenarios; (4) robustness ant!
From page 8...
... The committee recommends research into nonconventional continuous processes with the potential of yielding a more consistent product than possible with batch processes. Continuous mixing,
From page 9...
... The committee recommends that the final product should also be monitored through discrete embeciclec! and/or external sensors.
From page 10...
... The goal is to minimize maintenance costs and maximize in-service time by eliminating routine preventative maintenance. The committee concludes that the final overarching requirement to implement a model-basecl design methoclology is to view these materials ant!


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