The present invention relates to surface-modified polyolefin fibers, the use of these fibers in hydraulic binder compositions, hydraulic binder compositions containing these fibers and a method for reinforcing hydraulic binder compositions.

Manufactures, methods and apparatus are provided through which in some implementations a structural cellular lightweight concrete comprises a concrete mixture that is no more than 65% by volume of the manufacture of structural cellular lightweight concrete, the concrete mixture including concrete conforming to the requirements of ASTM C33; foam that has a density of at least 5 lbs./ft.sup.3, having high stability characteristics, and having a closed cell bubble structure; mix water being potable and free of contamination or deleterious materials; and Portland cement conforming to ASTM C150, the Portland cement being Type I, Type III or White Portland cement, and at least 35% air by volume of the manufacture of structural cellular lightweight concrete.

The present invention relates to surface-modified polyolefin fibers, the use of these fibers in hydraulic binder compositions, hydraulic binder compositions containing these fibers and a method for reinforcing hydraulic binder compositions.

A method for recycling an amine reclaimer waste composition obtained during reclaiming of an amine scrubbing solution has the steps of extracting carbon dioxide from an exhaust gas with an amine scrubbing solution, reclaiming the amine scrubbing solution wherein the amine reclaimer waste composition is obtained, and adding the amine reclaimer waste composition as a grinding aid to a binder component or as an admixture for enhancing the strength development and/or workability of a binder to the binder or a hydraulic building material made with the binder. A method for manufacturing a binder for manufacturing building materials uses the amine reclaimer waste composition.

Geopolymeric compositions are presented that are useful for cementing subterranean wells. The compositions may contain an aluminosilicate source, a metal silicate, an alkali activator and a slurry density modifier that may contain uintaite, vitrified shale, petroleum coke or coal or combinations thereof. Methods for placing the geopolymeric compositions in subterranean wells are also presented.