Prometheus Materials, Boulder, Colo. developer of bio-cement and bio-concrete technology debuting in molded, dry cast products, reports strong performance of 2-in. thick specimens subjected to ASTM C423-23, Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method. Testing at the Johns Manville Technical Center Acoustical Laboratory in Littleton, Colo. determined that the company’s bio-concrete—formulated with…
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