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Published March 2017 | metadata_only
Journal Article

Experimental Validation of Metaconcrete Blast Mitigation Properties


We provide experimental evidence of the mitigation properties of metaconcrete under blast loading. Mitigation is achieved through resonance of engineered aggregates consisting of a heavy and stiff core coated by a light and compliant outer layer. These engineered aggregates replace the standard gravel in conventional concrete. To assess experimentally the attenuation properties of metaconcrete, we have cast two batches of cylindrical specimens. The mortar matrix of the first batch consists of cement combined with a regular sand mix, while the mortar matrix of the second batch consists of cement combined with sand mix, fine gravel, and polymeric fibers. One of the specimens of each batch was cast with no aggregates, while the other two contained 40 and 60, respectively, randomly arranged 22 mm diameter commercially available computer mouse balls. We performed nondestructive dynamic tests by applying a 10 V amplitude periodic signal to one end of the specimens and measuring the amplitude of the transmitted signal received at the other end. We observed a remarkable 2 order of magnitude reduction in the amplitude of the transmitted signal in metaconcrete relative to conventional concrete.

Additional Information

© 2016 ASME. Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received September 29, 2016; final manuscript received November 14, 2016; published online December 1, 2016. Assoc. Editor: Weinong Chen. The specimen preparation help and lab assistance of Dr. Wei-Lin Tan and Alyssa Poletti and the support of Professor Dennis Kochmann are gratefully acknowledged. The support from the Air Force Office of Scientific Research Grant No. FA9550-12-1-0091 through Caltech's University Center of Excellence in High-Rate Deformation Physics of Heterogeneous Materials is gratefully acknowledged.

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August 19, 2023
August 19, 2023