Abstract: Building materials that include a structure such as a structural support are described, wherein the structure defines a plurality of cavities at least partially filled with a polymeric foam. The polymeric foam may include a hydrophobic polyurethane foam having a density less than 5 pcf and/or the structure may include a hydrophobic polymer.

Abstract: Compositions such as concrete compositions are described for use in building materials and products. The composition may comprise an aggregate composition comprising a particulate suppressing component and a cement. The composition may have an impact resistance of at least Class 1 as measured under ANSI/FM 4473. Methods of preparing and using such compositions are also described.

Abstract: Dust suppression agents and methods of use, e.g., to reduce operator exposure to particulate matter released during machining of a material, are described. The method may include providing a retained dust suppression agent proximate to a surface of the material and machining the material at the surface with a tool having a mechanized motion. The mechanized motion of the tool may release at least a portion of the retained dust suppression agent to reduce operator exposure to respirable particulate matter from the material as compared to machining the material at the surface absent the retained dust suppression agent.