POZZOLANIC COMPOSITIONS CONTAINING FLY ASH AND REMEDIATION AGENTS FOR USE IN CEMENTITIOUS MATERIALS

    公开(公告)号:US20200277227A1

    公开(公告)日:2020-09-03

    申请号:US16877387

    申请日:2020-05-18

    摘要: It has been unexpectedly discovered that the addition of a natural or other pozzolan to non-spec fly ash significantly improves the properties of the non-spec fly ash to the extent it can be certified under ASTM C618 and AASHTO 295, as either a Class F or Class C fly ash. The natural pozzolan may be a volcanic ejecta, such as pumice or perlite. Other pozzolans may also be used for this beneficiation process. Many pozzolans are experimentally tested and may be used to beneficiate non-spec fly ash into certifiable Class F fly ash. Additionally, this disclosure provides a method of converting a Class C fly ash to a more valuable Class F fly ash. This discovery will extend diminishing Class F fly ash supplies and turn non-spec fly ash waste streams into valuable, certified fly ash pozzolan which will protect and enhance concrete, mortars and grouts.

    SETTABLE COMPOSITIONS COMPRISING REMEDIATED FLY ASH (RFA) AND METHODS OF CEMENTING IN SUBTERRANEAN FORMATIONS

    公开(公告)号:US20200010363A1

    公开(公告)日:2020-01-09

    申请号:US16577168

    申请日:2019-09-20

    摘要: Some embodiments of the present invention comprise a method of cementing comprising: placing a settable composition into a well bore, the settable composition comprising RFA, hydraulic cement, and water; and allowing the settable composition to set. Other embodiments comprise a method of cementing comprising: placing a settable composition into a well bore, the settable composition comprising RFA, calcium hydroxide (lime), and water; and allowing the settable composition to set. Other embodiments comprise a settable composition comprising: RFA, hydraulic cement, calcium hydroxide, natural pozzolan and water; and allowing the composition to set. Other embodiments comprise a settable composition comprising RFA and any combination of hydraulic cement, calcium hydroxide, slag, fly ash, and natural or other pozzolan.