Even the most cynical campaigners conceded we may have entered a new era of climate-change action in November when America and China, the two biggest polluters, made an unprecedented joint pledge to make concrete reductions in their carbon emissions.
Furthermore, it is evident that, in the face of concrete reductions in economic global resources, public health care must confront increasing demands.
Fourteen years later, a Tulane University study, funded by the U.S. Department of Labor and released today, shows that the very encouraging progress that has been made is not translating into concrete reductions in the number of children whose experience mirrors Emmanuel's.
These characteristics promotes faster concrete production, reduction of curing waiting time, reduction of construction costs, early project completion, reduction of maintenance costs and increased service life of construction projects.
The changes include use of ultra-high-strength-fiber concrete (UHSF-concrete), reduction of the thickness of the shell, and consideration of imperfections of the original geometry of the structure.
A new technique is presented that uses two horizontal and vertical FE models to consider the concrete stiffness reduction of NPP buildings subjected to orthogonal ground motion excitations, in which appropriate stiffness reduction factors, based on the input motion orientation, are applied.
It also proposes modifications to the calcium nitrate micro encapsulation procedure to minimize the concrete strength reduction.
Although the high amount of RHA in OPS Concrete caused reduction of compressive strength and workability, incorporating FA along with RHA addressed this issue.
The proposed calculation procedure enables evaluation of a concrete thickness reduction factor of a composite barrier compared to a bare RC barrier.
Based on the new load introduction mechanism, for slender CFST column design, a "concrete strength reduction factor" should be used to account for incomplete load introduction, when calculating the CFST column cross-section flexural stiffness.
