PERLITE-BASED CEMENTITIOUS MATERIALS, CONCRETE, AND RELATED TECHNIQUES

    公开(公告)号:US20240228375A1

    公开(公告)日:2024-07-11

    申请号:US18577738

    申请日:2022-02-15

    Applicant: VHSC, LTD.

    Abstract: Treated perlite-based cementitious materials, concrete, and related techniques are disclosed. In accordance with some embodiments, a treated perlite-based cementitious material may be produced by intergrinding raw perlite ore, polyvinyl alcohol (PVA) powder, a polycarboxy late material, and (optionally) at least one of calcium sulfate (CaSO4) and calcium sulfite (CaSO3). In accordance with some embodiments, expanded perlite wastes and/or expanded perlite also may be included in the cementitious material. In accordance with some embodiments, raw perlite ore, expanded perlite wastes, and expanded perlite may be combined in providing a cementitious material. In at least some cases, the cementitious material may be provided as an all-in-one powder blend. In accordance with some embodiments, concrete may be produced by mixing the cementitious material with ordinary Portland cement (OPC), sand, rock, and water.

    Class C fly ash-based cementitious materials, flowable fill, concrete, and related techniques

    公开(公告)号:US11919810B2

    公开(公告)日:2024-03-05

    申请号:US17480464

    申请日:2021-09-21

    Applicant: VHSC, LTD.

    Abstract: Class C fly ash-based cementitious materials, concretes, and related techniques are disclosed. In accordance with some embodiments, an activated class C fly ash-based cementitious material may be produced by intergrinding class C fly ash (e.g., classified to remove quartz and/or other contaminants and, thus, increase the reactive materials present), an activator, sodium citrate, borax, and a polycarboxylate material. The class C fly ash may have an amorphous glass content of about 60 wt % or more, a calcium oxide (CaO2) content of about 20 wt % or more, and a quartz content of about 10 wt % or less. The activator may be a chemical which reacts with class C fly ash to form strätlingite structures therein when introduced with water. In some cases, the cementitious material may be provided as an all-in-one powder blend. In some cases, techniques disclosed herein may be utilized in providing a fast-setting flowable fill material.

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