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Architecture news & editorial desk A research partnership between Oak Ridge National Laboratory (ORNL) and the University of Tennessee has led to the development of a quick-setting concrete mix that is expected to reduce manufacturing time in the precast industry. The concrete mix demonstrated high early strength within six hours of mixing, potentially doubling the production capacity for the precast industry, according to ORNL. The researchers used commercially available components including steel, glass and carbon fibres in the study, resulting in a self-compacting fibre-reinforced concrete mix that not only exhibited early strength but also maintained its workability for 30 minutes. Quick performing concrete shortens manufacturing turnaround for prefabricated assemblies such as walls, beams and floor slabs. However, such concrete mixes showing early strength have short setting times and, therefore, require specific curing methods. ....
E-Mail IMAGE: ORNL researchers used electron beam powder bed fusion to produce refractory metal molybdenum, which remained crack free and dense, proving its viability for additive manufacturing applications. view more Credit: ORNL/U.S. Dept. of Energy Manufacturing - Mighty Mo Oak Ridge National Laboratory scientists proved molybdenum titanium carbide, a refractory metal alloy that can withstand extreme temperature environments, can also be crack free and dense when produced with electron beam powder bed fusion. Their finding indicates the material s viability in additive manufacturing. Molybdenum, or Mo, as well as associated alloys, are difficult to process through traditional manufacturing because of their high melting temperature, reactivity with oxygen and brittleness. ....
Date Time Buildings – Concrete on double ORNL researchers used fiber reinforcements made of steel, glass and carbon to develop a concrete mix that demonstrated high early strength within six hours of production, which is needed for the precast concrete industry. Credit: ORNL/U.S. Dept. of Energy Researchers from ORNL and the University of Tennessee collaborated to perform lab-scale evaluations on the high early strength fiber-reinforced self-compacting concrete mix. Credit: University of Tennessee ORNL researchers used fiber reinforcements made of steel, glass and carbon to develop a concrete mix that demonstrated high early strength within six hours of production, which is needed for the precast concrete industry. Credit: ORNL/U.S. Dept. of Energy ....