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Artificial synthetic stone composite magnesium oxysulfate binding material and preparation method and application thereof

A technology of artificial granite and magnesium oxysulfide glue, which is applied in the field of magnesium oxysulfide cementitious materials and can solve problems such as difficulty in improving material properties.

Active Publication Date: 2019-07-30
广西建设职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Yet the inventor thinks: there are many thermodynamically unstable connection points to exist in this network structure, and when meeting water, magnesium oxysulfide cementitious material structural lattice loses adsorption and is partially hydrolyzed; The basic ternary system of cement is difficult to improve material properties

Method used

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  • Artificial synthetic stone composite magnesium oxysulfate binding material and preparation method and application thereof
  • Artificial synthetic stone composite magnesium oxysulfate binding material and preparation method and application thereof
  • Artificial synthetic stone composite magnesium oxysulfate binding material and preparation method and application thereof

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Effect test

Embodiment 1

[0032] 1. Test raw materials:

[0033] The magnesium sulfate heptahydrate was purchased from Fangchenggang Wuxing Chemical Reagent Factory, industrial grade, and its chemical composition is shown in Table 1.

[0034] The light-burned magnesia powder is produced in Haicheng, Liaoning, and its activity is determined to be 66.72% by hydration test. The chemical composition is shown in Table 2.

[0035] The artificial granite waste slag is taken from Hezhou, Guangxi. After drying and grinding, it is a white powder with a whiteness of 85.7%. XRD analysis sees figure 1 , and its chemical composition is shown in Table 2.

[0036] The citric acid was purchased from Nanning Lantian Chemical Reagent Company and was chemically pure.

[0037]The aggregate is ISO standard sand, and the water is tap water.

[0038] The chemical composition (unit: %) of table 1 technical grade magnesium sulfate heptahydrate

[0039]

[0040] Table 2 Granite waste slag and lightly burned MgO compositio...

Embodiment 2

[0068] On the basis of test number 2 and 3 of table 3 in embodiment 1, add the fly ash of 10-15% of the sum of artificial granite and active MgO quality respectively again, constitute 5% artificial granite waste slag-10% Fly ash and 10% artificial granite-15% fly ash are two kinds of composite magnesium oxysulfide cementitious materials. The said fly ash is class I class F of the thermal power station. The place of origin is Gongyi, Henan. The chemical composition of the fly ash is shown in the table 7.

[0069] Table 7 fly ash composition (unit: %)

[0070]

[0071] Sample preparation and test method are with reference to embodiment 1, find through test, and fly ash particle size is less, and mostly is spherical (such as Figure 11 shown), the SEM image of the magnesium oxysulfide cement slurry sample mixed with 5% artificial stone waste residue + 10% fly ash is shown Figure 12 shown. The addition of fly ash can play a role in lubricating and supplementing the lack of ...

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Abstract

The invention relates to the field of magnesium oxysulfate binding materials, and discloses an artificial synthetic stone composite magnesium oxysulfate binding material and a preparation method and application thereof. The material is formed by compounding artificial synthetic stone, a modified magnesium oxysulfate binding material and aggregates. The modified magnesium oxysulfate binding material is the magnesium oxysulfate binding material obtained after citric acid modification, and the magnesium oxysulfate binding material is formed by compounding magnesium sulfate heptahydrate and lightcalcined magnesia; the adding amount of the artificial synthetic stone is 5-20% of the mass of magnesium oxide in the unmodified magnesium oxysulfate binding material; the mass of magnesium oxide in the magnesium oxysulfate binding material with no synthetic stone waste residue is adopted as the reference magnesium oxide mass; the citric acid addition amount is 0.5-1.2% of the mass of the reference magnesium oxide; the addition amount of aggregates is 3.5-4.5 times the reference magnesium oxide mass; the addition amount of magnesium sulfate heptahydrate is 35-48% the reference magnesium oxidemass. The defect that the magnesium oxysulfate binding material is low in strength is overcome, the characteristics of artificial synthetic waste are used for improving the performance of the magnesium oxysulfate binding material.

Description

technical field [0001] The invention relates to the field of magnesium oxysulfide gelling materials, in particular to an artificial granite composite magnesium oxysulfide gelling material and its preparation method and application. Background technique [0002] In the Background of the Invention, the disclosed information is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] Magnesium oxysulfate cement is a cementitious material made of MgO·MgSO 4 ·H 2 A ternary system gelling material composed of O. The main raw materials are: light-burned magnesium oxide, magnesium sulfate heptahydrate, water, and additives. Among them, light-burned magnesia is made of magnesite (made by high-temperature grinding, and its main chemical component is active MgO. Mag...

Claims

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Application Information

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IPC IPC(8): C04B28/30
CPCC04B28/30C04B2201/50C04B24/06C04B18/12C04B14/06C04B18/08
Inventor 付希尧吴丹孙义刚
Owner 广西建设职业技术学院
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