Ut-battelle, Inc.

University of Tennessee Research Foundation

Catherine H Mattus

Yarom Polsky

Diana Hun

James Gordon Hemrick

Michael J Lance

Joseph Owino

Mbakisya Onyango

Alex Brent Rollins

A lightweight concrete composition includes the concrete components, per ydof concrete: Type III Portland cement (lb/yd) 200-900; metakaolin (lb/yd) 100-520; calcium sulfoaluminate cement (CSA) (lb/yd) 40-840; 3/8&#x2033; lightweight expanded slate aggregate (lb/yd) 70-550; lightweight fine expanded slate aggregate (lb/yd) 300-550; expanded glass fine aggregate (0.5-1 mm) 35-90 (lb/yd); expanded glass fine aggregate (1-2 mm) 35-90 (lb/yd); water (lb/yd) 300-350; CSA cement set retarder 0.015 to 0.06 oz per lb of CSA cement; high-range water-reducing admixture 120-1000 (fl. oz/yd); hydration controlling admixture 0-80 (fl. oz/yd); reinforcing non-metallic lightweight fibers &#x3c;1.5&#x2033; in length 0-8 (lb/yd); wherein the concrete has a flexural strength of at least 600 psi at 12 hours, a density of 95 to 110 lb/ft, and a compressive strength at 28 days of at least 7,000 psi. A lightweight concrete wythe and method of making a lightweight concrete wythe are also disclosed.

High-performance concrete mix for precast wythes

A system and method measures subterranean stress. The system and method includes a cement mixture that is mixed with water to set as a solid and a stress measuring-medium having piezospectroscopic properties that directly reveals stress in situ within the cement mixture in response to a photo stimulation. The stress measuring-medium combines with the cement mixture as a dry blend before being combined with water.

Cement having stress-indicating properties

Growing community of inventors

Oak Ridge, TN, United States of America

Catherine H Mattus