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 its namesake “slump test.” Fly ash is often repurposed to manufacture this highly alkaline material, (10[2])in which the alkali–silica reaction may create a swellable gel. Eight percent of global CO2 emissions (10[1])come from heating limestone and aluminosilicates in kilns to 1450 degrees Celsius to make one component of this material named for Portland, England. To reduce cracking in this material, rebar is often “pre-tensioned” before embedding. For 10 points, steel is used to strengthen the “reinforced” form of what building material made by combining sand and gravel with cement? ■END■