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A method for preparing cementitious material using Chaerhan salt lake solution, slag and silica fume

A technology of cementitious material and salt solution, applied in cement production and other directions, can solve the problems of easy cracking, limited production and application of cementitious materials, too fast setting time, etc., and achieves good mechanical properties and rheology, remarkable economic and Practicality and the effect of promoting economic circular development

Active Publication Date: 2021-06-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Granulated blast furnace slag and silica fume are industrial solid wastes. After mixing slag, silica fume, alkaline activator and water together, a certain strength gelled slurry can be prepared, which has low heat of hydration, high temperature resistance and good durability. However, there are problems such as too fast setting time, large shrinkage deformation, strength shrinkage and easy cracks, which limit the production and application of this type of cementitious material.
The problems of alkali-activated materials in terms of strength shrinkage and volume shrinkage also limit the application of such materials

Method used

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  • A method for preparing cementitious material using Chaerhan salt lake solution, slag and silica fume
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  • A method for preparing cementitious material using Chaerhan salt lake solution, slag and silica fume

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Embodiment Construction

[0025] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0026] A kind of method using Chaerhan salt lake solution and slag, silica fume to prepare cementitious material, comprises the steps:

[0027] 1. Take salt lake brine solution: simulate the type and content of ions in Chaerhan Salt Lake and configure the salt solution with the same ion concentration. The concentration of the salt solution is: KCl: 11g / L, NaCl: 90g / L, CaCl 2 : 12g / L, MgCl 2 : 60g / L, MgSO 4 : 30g / L. After the solution is prepared, it is left to stand in a sealed environment for a day and night, and then it is ready for use.

[0028] 2. Crushing and grinding the granulated blast furnace slag until the specific surface area is greater than 350m 2 / kg to obtain granulated blast furnace slag powder, the gelling activity index reaches S95 level, and the silica fume is ground until the specific surface area is greater than 20,000m...

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Abstract

A method for preparing cementitious materials using Chaerhan Salt Lake solution, slag and silica fume, and relates to the field of cementitious material preparation. Salt solution, ground slag and silica fume powder are used to prepare cementitious material, and the prepared cementitious material has good mechanical properties and rheology. It can meet the requirements for the use of non-load-bearing structural cementitious materials. The gelling material prepared by the invention also utilizes a large amount of solid waste, improves the utilization rate of industrial solid waste, and promotes the development of economic cycle. It can replace the low-grade cement concrete material in the brine area, and has the advantages of saving resources and certain economy and operability.

Description

technical field [0001] The invention belongs to the technical field of gelling material preparation, in particular to a method for preparing gelling material by using Chaerhan Salt Lake solution, slag and silica fume. Background technique [0002] Thousands of salt lakes are distributed in Northwest my country, especially in Xinjiang, Tibet and Inner Mongolia. The environmental and climatic conditions in the salt lake areas are harsh, and the durability of concrete is extremely serious. With the development of resources such as oil and natural gas in these areas, many projects are built on the salt lake or pass through the salt lake area, and the service life is required to be more than 50-100 years. Concrete building structures and roads in the Salt Lake area are generally under the action of various salt halide ions, and the service time is generally shorter than that in ordinary areas. It is very important to enhance the durability of concrete and prolong its service life...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/147C04B28/08
CPCC04B7/147C04B28/08C04B2111/00017C04B2201/50C04B22/0026C04B2103/302Y02P40/10
Inventor 宋强胡亚茹朱绘美张军
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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