Chute turning restriction mechanism
US-8967358-B2 · Mar 3, 2015 · US
Method For Modifying Recycled Fine Powder Of Concrete And Use Thereof
US2022314491A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022314491-A1 |
| Application number | US-202117365296-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 1, 2021 |
| Priority date | Apr 1, 2021 |
| Publication date | Oct 6, 2022 |
| Grant date | — |
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- Title
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Abstract
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Methods for modifying a recycled fine powder of concrete and uses thereof. A method for modifying a recycled fine powder can include: crushing a collected waste concrete block step by step with a crusher, grinding with a ball mill, and passing through a 100-mesh sieve, to obtain a recycled fine powder with d50 of 13.5 μm; placing the obtained recycled fine powder in a dry environment at a high temperature, drying, then taking out, and cooling to room temperature; preparing tannic acid solutions with different concentrations, mixing the cooled recycled fine powder with the prepared tannic acid solutions, and continuously stirring by a glass rod.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for modifying a recycled fine powder of concrete, comprising: crushing a collected waste concrete block step by step with a crusher, grinding with a ball mill, and passing through a 100-mesh sieve, to obtain said recycled fine powder with d50 of 13.5 μm; placing said recycled fine powder in a dry environment at a high temperature, drying, then taking out, and cooling to room temperature; and preparing a plurality of tannic acid solutions with different concentrations, mixing said recycled fine powder with said plurality of tannic acid solutions, and continuously stirring by a glass rod. 2 . The method of claim 1 , wherein the drying is performed at a temperature of 105° C. for 2 hours. 3 . The method of claim 1 , wherein the tannic acid solutions have a mass fraction (accounting for the mass of water) of 0%, 0.3% and 0.5%, respectively. 4 . The method of claim 1 , wherein continuously stirring by said glass rod is performed for 2 minutes. 5 . The method of claim 1 , wherein said plurality of tannic acid solutions are analytical reagents with a purity of ≥95%. 6 . A method for using the recycled fine powder modified by the method of claim 1 in a concrete, comprising using the recycled fine powder modified by the plurality of tannic acid solutions with different concentrations to replace cement with a replacement rate of 10%.
Assignees
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Classifications
from waste building materials, e.g. waste asbestos-cement products, demolition waste · CPC title
from building or ceramic industry · CPC title
- C04B24/38Primary
Polysaccharides or derivatives thereof {(C04B24/243 takes precedence)} · CPC title
Methods for mixing (B28C5/386, B28C5/402 take precedence) · CPC title
- B28C5/12Primary
with stirrers sweeping through the materials {, e.g. with incorporated feeding or discharging means or with oscillating stirrers} · CPC title
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- What does patent US2022314491A1 cover?
- Methods for modifying a recycled fine powder of concrete and uses thereof. A method for modifying a recycled fine powder can include: crushing a collected waste concrete block step by step with a crusher, grinding with a ball mill, and passing through a 100-mesh sieve, to obtain a recycled fine powder with d50 of 13.5 μm; placing the obtained recycled fine powder in a dry environment at a high …
- Who is the assignee on this patent?
- Univ Anhui Sci & Technology
- What technology area does this patent fall under?
- Primary CPC classification C04B24/38. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Oct 06 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).