Full scale tests with crushed concrete used in sub-bases in roads show that the material has capacity to reharden, very slowly but also after prolonged periods of time. The rehardening process in crushed concrete aggregate has been analysed with a thermogravimetric method, comparing the change in chemical composition in the aggregate when set with water, compacted and hardened. It has been show...

A multisurface glass roller bottle has been constructed for the growth of animal cells in culture. This bottle contains five concentrically placed glass cylinders that provide additional surfaces for the growth of animal cells. The bottle occupies the same space as a standard roller bottle, but it contains nine times the surface area of a standard bottle. L and HeLa cells can be grown in the bo...

The existing Scoggins Dam and reservoir are in Washington County, Oregon, the title is held by U.S. Bureau of Reclamation (Reclamation). has previously identified dam safety concerns related to embankment dam. Regional project sponsors, including Clean Water Services, have need for expanded storage capacity meet growing water demands address quality issues Tualatin River downstream As part effo...