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A kind of preparation method of nano self-compacting air-hardening mortar

An air-hardening and self-compacting technology, applied in the direction of additive processing, etc., to achieve the effects of improving fluidity, increasing strength, improving later strength and water resistance

Active Publication Date: 2019-10-18
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Concrete is a hydraulic cementitious material, and calcium sulfate hemihydrate is an air-hardening cementitious material. At present, there is no report on air-hardening self-compacting materials.

Method used

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  • A kind of preparation method of nano self-compacting air-hardening mortar
  • A kind of preparation method of nano self-compacting air-hardening mortar

Examples

Experimental program
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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with specific examples.

[0013] In calcium sulfate, add organic interface agent, nano-mineral active agent, water-repellent agent, cross-linking agent, aggregate, and mix well to obtain dry mortar powder; add water to dry mortar powder, stir well, then pour into abrasive tools, Curing in the air for 1 day to obtain an air-hardening material.

[0014] Table 1 lists 18 examples numbered 1-18.

[0015] Table 1

[0016]

[0017]

[0018] In 16 examples, the strength of the air-hardening material obtained is greater than 30MPa.

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Abstract

The invention discloses a preparation method of nanometer self-compaction air setting mortar. The method comprises the steps of adding an organic adhesion agent, a nanometer mineral active agent, a water repellent, a cross-linking agent and aggregate into calcium sulfate to acquire dry mortar powder by mixing the materials uniformly; and adding water into the dry mortar powder, and after stirring uniformly, pouring the size into a grinding tool for conserving for 1 day in the air to acquire the nanometer self-compaction air setting material. The dry mortar powder can also be used for preparing building floors and wallboards, and can also be used as ink applied to 3D printing of building materials.

Description

technical field [0001] The invention relates to a method for preparing mortar. Background technique [0002] Calcium sulfate is also called gypsum. The so-called gypsum refers to raw gypsum, and its chemical essence is calcium sulfate dihydrate (CaSO4 2H2O). When it is re-dried at 128°C, it will lose part of the crystallization water and become β-hemihydrate gypsum. Its chemical essence is β-calcium sulfate hemihydrate (β-CaSO4 1 / 2H2O). It will lose part of the crystallization water and become α-hemihydrate gypsum, whose chemical essence is α-calcium sulfate hemihydrate (α-CaSO4 1 / 2H2O). These two hemihydrate gypsums have the same chemical formula, but different microstructures. [0003] Self-compacting concrete is a new type of cement concrete material prepared with the help of composite high-efficiency water reducer, ultra-fine fly ash and silica fume and other active mixtures. Its fluidity is higher than that of commonly used ordinary concrete, fluid concrete, High-stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14B33Y70/00C04B111/27
Inventor 董发勤谭宏斌贺小春何平徐中慧刘金凤何花
Owner SOUTHWEAT UNIV OF SCI & TECH
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