Agricultural waste ash as cementitious material and methods of making the same
AssigneeColorado State University Research Foundation
InventorMahmoud Shakouri
Life of this patent
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Abstract
Embodiments of the present disclosure relate to methods of a method of making agricultural waste ash supplementary cementitious materials (AWASCMs), the method includes pretreating agricultural waste with acid, burning the acid pretreated agricultural waste to form agricultural waste ash (AWA), heat treating the AWA, grinding the AWA into an AWA supplemental cementitious material (AWASCM), and mixing the AWASCM with cement, water, and supplementary cementitious materials (SCMs) to create a cement paste. Embodiments of the present disclosure relate to a composition including sand, coarse aggregate, and cementitious materials. The cementitious materials includes cement, a SCM, and an AWASCM. The AWASCM includes an AWA and AWF.
Claims6
A composition, comprising:
- sand;
- coarse aggregate;
- and
- cementitious materials, the cementitious materials comprising:
- cement;
- a supplementary cementitious materials (SCM);
- and
- an agricultural waste ash supplementary cementitious material (AWASCM), the AWASCM comprising:
- a 500-1500° C. heat-treated agricultural waste ash (AWA), the heat-treated AWA comprising corn stover ash;
- and
- agricultural waste fibers (AWF), the AWF comprising corn fiber;
- and wherein the AWA is an acid pretreated AWA, wherein the AWA is pretreated with hydrochloric acid (HCl), nitric acid (H{NO3), sulfuric acid (H2SO4), ethylenediaminetetraacetic acid (EDTA), acetic acid (CH3COOH), citric acid, oxalic acid (C2H2O4), or combinations thereof.
Dependencies are inferred from the claim text.