Abstract: Pozzolan compositions incorporate glassy, amorphous particulates derived from byproducts of processes in which substantial energy was invested in generating those byproducts, at least one of which comprises amorphous calcium silicate slag generated as a byproduct of phosphorous production. The calcium silicate particulate is blended with one or more additional pozzolans, preferably one or more particulates of a material selected from the group consisting of fused silica of the type generated as a byproduct of making refractory grade fused silica and cullet glass of the type rejected from glass making processes. Pozzolanic cements incorporating up to about 50% by weight of such pozzolan compositions are also disclosed.

Abstract: Compositions for increasing the amount of available silica, calcium, magnesium, and sulfur are described herein. The compositions contain calcium silicate (CaSiO2) and magnesium sulfite (MgSO3). Calcium silicate may be in the form of calcium silicate slag. Magnesium sulfite may be a by-product obtained from power plants. In one embodiment, the composition is in granular form and contains 65-90% (wt) calcium silicate slag, 20-30% (wt) magnesium sulfite, 0-5% (wt) expandible clay, and 2-10% (wt) residual moisture (H2O). In a preferred embodiment, the granules contain 31% (wt) silica, 22% (wt) calcium, 3% (wt) magnesium, and 4% (wt) sulfur. In a second embodiment, the composition is non granular and contains 75-90% (wt) calcium silicate slag, 10-20% (wt) magnesium sulfite and 0-10% (wt) H2O. The compositions may be applied to golf courses or residential or commercial lawns to improve the growth of grasses and their resistance to disease and insects.