CNF-reinforced steel slag-based geopolymer cementing material, molded body and preparation and application thereof

A technology of polymer glue and molded body, applied in cement production and other directions, can solve the problems of low environmental protection advantages of cementitious materials, low proportion of steel slag, energy consumption, etc., and achieve good industrialization prospects, good mechanical properties, and good comprehensiveness. The effect of mechanical properties

Inactive Publication Date: 2021-02-23
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The defect of this technical solution is: metakaolin is a calcined product of kaolinite minerals, and its environmental protection advantage is not obvious compared with cement. Therefore, when the strength of the cementitious material is high, the proportion of metakaolin is very high, and the proportion of steel slag is small; and this technical solution needs to use a large amount of water glass solution, sodium sulfate and sodium fluoride as alkaline excitation The production of these alkali activators also needs to consume energy and discharge pollutants, so the environmental protection advantages of the gelled material in the present invention are not outstanding, and there is no reference value for the current technical problems to be solved

Method used

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  • CNF-reinforced steel slag-based geopolymer cementing material, molded body and preparation and application thereof
  • CNF-reinforced steel slag-based geopolymer cementing material, molded body and preparation and application thereof
  • CNF-reinforced steel slag-based geopolymer cementing material, molded body and preparation and application thereof

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preparation example Construction

[0035] In the preparation method provided by the present invention, those skilled in the art can choose a suitable method to prepare the molded body from each raw material of the CNF-reinforced steel slag-based geopolymer cementitious material. For example, in the preparation process, when CNF and steel slag are mixed, the method of test grinding and ball milling can be used to grind small-sized steel slag into steel slag powder, and CNF is evenly dispersed in steel slag powder to form uniform CNF and steel slag powder. Steel slag powder mixture; as another example, the curing temperature condition can be room temperature, preferably, the curing temperature condition can be 20-30°C.

[0036] As part of the core technical concept of this technical solution, by ball milling CNF and 2-5mm steel slag in a test mill in a specific proportion, the provided CNF and steel slag powder mixture, and a certain proportion of sodium silicate, NaOH and water prepared alkali After the activato...

Embodiment 1

[0050] The small particle size (2-5mm) steel slag produced by Taizhen Mineral Products Processing Plant, Lingshou County, Shijiazhuang City, Hebei Province is selected, and its main chemical composition is 36.54% CaO, 24.56% Fe 2 o 3 , 15.64% SiO 2 , 7.39% MgO, 5.43% Al 2 o 3 , 4.54% MnO, 2.62% P 2 o 5 , 1.75% TiO 2 , 1.53% other components, loss on ignition is 3.63% (both mass percentage); analytical pure NaOH of Shanghai Aladdin Biochemical Technology Co., Ltd.; industrial water glass of Shandong Youso Chemical Factory, modulus 3.3, its main chemical composition 8.11% Na 2 O, 5.89% SiO 2 , 66%H 2 O; XFM60CNF (diameter 50-200nm, length 1-15μm, purity ≥ 95%) of Nanjing Xianfeng Nano Material Technology Co., Ltd., the dosage is 0.1% of the steel slag quality; distilled water; choose SM-500 test mill suggested by Wuxi, Jiangsu, The rotating speed is 48r / min.

[0051] Preparation method comprises the following steps in the present embodiment:

[0052] (1) Add 3g of CNF...

Embodiment 2

[0059] This embodiment selects the small particle size (2~5mm) steel slag produced by Taizhen Mineral Products Processing Plant, Lingshou County, Shijiazhuang City, Hebei Province, and its main chemical composition is 36.54% CaO, 24.56% Fe 2 o 3 , 15.64% SiO 2 , 7.39% MgO, 5.43% Al 2 o 3 , 4.54% MnO, 2.62% P 2 o 5 , 1.75% TiO 2 , 1.53% other components, loss on ignition is 3.63% (both mass percentage); analytical pure NaOH of Shanghai Aladdin Biochemical Technology Co., Ltd.; industrial water glass of Shandong Youso Chemical Factory, modulus 3.3, its main chemical composition 8.11% Na 2 O, 5.89% SiO 2 , 66%H 2 O; XFM60CNF (diameter 50-200nm, length 1-15μm, purity ≥ 95%) of Nanjing Xianfeng Nano Material Technology Co., Ltd., the dosage is 0.5% of the steel slag quality; distilled water; choose SM-500 test mill suggested by Wuxi, Jiangsu, The rotating speed is 48r / min.

[0060] The CNF reinforced steel slag-based geopolymer in this example is prepared by the following...

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Abstract

The invention relates to a CNF reinforced steel slag-based geopolymer cementing material, a molded body, and preparation and application thereof. The CNF reinforced steel slag-based geopolymer cementing material comprises the following components in parts by weight: 50-70 parts of steel slag; 5-7 parts of water glass; 0.8-1.2 parts of NaOH; 20-30 parts of water; and CNF, wherein the mass of the CNF is 0.1-0.5% of the mass of the steel slag. Compared with the prior art, the CNF-reinforced steel slag-based geopolymer cementing material provided by the invention has the advantages that the moldedbody prepared from the CNF-reinforced steel slag-based geopolymer cementing material has better comprehensive mechanical properties, application of a geopolymer material in the field of constructional engineering materials can be better realized, a new direction is provided for resource utilization of steel slag, and the CNF-reinforced steel slag-based geopolymer cementing material has a good industrialization prospect.

Description

technical field [0001] The invention relates to the field of environment-friendly building materials, in particular to a CNF-reinforced steel slag-based geopolymer gelling material, a molded body, a preparation method and application thereof. Background technique [0002] Steel slag is solid waste discharged during the smelting process of crude steel in steelworks, and its main components are calcium oxide, iron oxide, silicon dioxide and alumina. Due to the rapid development of the steel industry and the low utilization rate of steel slag, my country has a large amount of accumulated steel slag, which not only takes up valuable land, but also pollutes the environment. Geopolymer material refers to a new type of green gelling material formed by using fly ash, kaolin, metallurgical slag, industrial waste slag and other minerals and solid wastes containing silicon-aluminum oxide compounds as raw materials, stimulated by lye, and undergoes a geological polymerization reaction. ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/38
CPCC04B28/006C04B2201/50C04B18/142C04B22/062C04B12/04C04B14/386Y02P40/10
Inventor 朱兴一李文凯李峰杜豫川
Owner TONGJI UNIV
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