A company founded by Ginger Krieg Dosier manufactures a precursor to this material biologically via MICP by Sporosarcina pasteurii. This material is packed in an Abrams cone, which is then removed before measuring a resultant height difference, in (10[1])its namesake “slump test.” Fly ash (10[1])is often repurposed to manufacture (10[1])this highly alkaline material, (10[3]-5[1])in which the alkali–silica (-5[1])reaction may create a swellable (10[1])gel. (10[1])Eight percent of global CO2 (10[1])emissions (10[1])come (10[1])from (10[1])heating (10[1])limestone (10[5])and (10[1]-5[1])aluminosilicates (10[1])in kilns (10[3])to 1450 degrees Celsius (-5[1])to make one component (-5[1])of this material (10[1])named for (10[1])Portland, England. (10[4]-5[1])To (10[1])reduce cracking in this (10[1])material, (10[1]-5[1])rebar (-5[1])is (10[1])often (10[1])“pre-tensioned” (10[1]-5[1])before embedding. (10[2])For 10 points, steel is used to strengthen (10[1])the “reinforced” (10[1])form of what building material made by combining sand and gravel with cement? (10[2])■END■ (10[5])