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Preparation method of gamma-C2S-based cementing material

A technology of base glue and raw material, which is applied in the field of preparation of γ-C2S base cementitious materials, can solve the problems of incapability of industrial production and application and high preparation cost, and achieve the effects of reducing energy consumption for grinding and reducing production costs.

Pending Publication Date: 2020-07-10
山东汉博昱洲新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a γ-C 2 The preparation method of S-based cementitious materials to solve the existing γ-C 2 S preparation cost is high, the problem of being unable to industrial production and application

Method used

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  • Preparation method of gamma-C2S-based cementing material
  • Preparation method of gamma-C2S-based cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a gamma-C 2 The preparation method of S base cementitious material, comprises the following steps:

[0023] 1) According to the calcium-silicon molar ratio of 2.1, put limestone and sandstone into a ball mill and ball mill and mix them for 2 hours to obtain raw materials for firing, wherein the calcium oxide content in the limestone is ≥50%, and the silicon dioxide content in the sandstone is ≥85%;

[0024] 2) Mix the calcined raw material with 10% absolute ethanol evenly, press it into a green body under a molding pressure of 30MPa, then fully dry it at 60°C, and then put the dried green body into In the high-temperature furnace, raise the temperature to 800°C at a heating rate of 10°C / min, and keep it for 1 hour to ensure that the calcium carbonate in the raw material is fully decomposed, then continue to raise the temperature to 1350°C at a heating rate of 10°C / min, and keep it for 3 hours. Cool naturally to room temperature to obtain γ-C 2 S-based gelling material...

Embodiment 2

[0028] a gamma-C 2 The preparation method of S base cementitious material, comprises the following steps:

[0029] 1) According to the calcium-silicon molar ratio of 2.0, put steel slag and sandstone into a ball mill and ball mill and mix them for 2 hours to obtain raw materials for firing, wherein the content of calcium oxide in the limestone is ≥ 50%, and the content of silicon dioxide in the sandstone is ≥ 85%;

[0030] 2) Mix the calcined raw material with 10% absolute ethanol evenly, press it into a green body under a molding pressure of 20MPa, then fully dry it at 60°C, and then put the dried green body into In the high-temperature furnace, raise the temperature to 800°C at a heating rate of 10°C / min, and keep it warm for 0.5h to ensure that the calcium carbonate in the raw material is fully decomposed, then continue to raise the temperature to 1400°C at a heating rate of 10°C / min, and keep it for 3h. The furnace was naturally cooled to room temperature to obtain γ-C 2...

Embodiment 3

[0034] a gamma-C 2 The preparation method of S base cementitious material, comprises the following steps:

[0035] 1) According to the molar ratio of calcium to silicon of 2.3, limestone and silica are put into a ball mill and ball milled for 2 hours to obtain raw materials for firing, wherein the content of calcium oxide in the limestone is ≥ 50%, and the content of silicon dioxide in the sandstone is ≥ 85%;

[0036] 2) Mix the calcined raw material with 10% absolute ethanol evenly, press it into a green body under a molding pressure of 15MPa, then fully dry it at 60°C, and then put the dried green body into In the high-temperature furnace, raise the temperature to 800°C at a heating rate of 10°C / min and keep it warm for 1 hour to ensure that the calcium carbonate in the raw material is fully decomposed, then continue to raise the temperature to 1500°C at a heating rate of 10°C / min Cool naturally to room temperature to obtain γ-C 2 S-based gelling material.

[0037] The γ-...

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Abstract

The invention provides a preparation method of a gamma-C2S-based cementing material. The method comprises the following steps: 1, mixing a calcium raw material and a siliceous raw material according to a calcium-silicon molar ratio of 2.0: 2.3, and carrying out ball-milling mixing to obtain a sintering raw material, wherein the calcium raw material is one of limestone, marl and steel slag, and thesiliceous raw material is one or more of sandstone and silica; and 2) mixing the sintering raw material with absolute ethyl alcohol with the mass fraction of 10%, pressing into a green body, drying,sintering, and naturally cooling to obtain the gamma-C2S-based cementing material. The gamma-C2S-based cementing material is prepared from industrial raw materials, the prepared gamma-C2S-based cementing material has a self-pulverization characteristic, the grinding energy consumption of clinker can be reduced, and a carbonized product of the gamma-C2S-based cementing material has the characteristics of quick hardening and high strength of a gamma-C2S carbonized product at the same time. In addition, the gamma-C2S-based cementing material is prepared by sintering the industrial raw materials,so that the production cost of the gamma-C2S is greatly reduced, and the method has very important practical significance for industrial production and application of the carbonized hardened cementingmaterial.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a γ-C 2 A preparation method of S-based gelling material. Background technique [0002] With the continuous aggravation of global warming, the massive emission of carbon dioxide has aroused widespread concern around the world. In order to promote the transformation of the cement industry to the direction of energy saving and emission reduction, carbonized hardened calcium silicate products are produced. Studies have shown that most calcium silicate minerals in cement have high carbonation reactions, of which γ-C 2 S is a calcium silicate mineral with high carbonization activity, and has self-pulverization characteristics in the sintering process, which can significantly reduce the energy consumption of grinding, so it is an ideal raw material for the development of carbonation hardening low-carbon cementitious materials. [0003] As a new structural material, carbona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/44C04B7/147
CPCC04B7/147C04B7/44Y02P40/10
Inventor 王发洲刘志超赵思雪何永佳
Owner 山东汉博昱洲新材料有限公司
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