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High-temperature-resistant geopolymer mortar and preparation method thereof

A technology of geopolymer and high temperature resistance, which is applied in the field of high temperature resistant geopolymer mortar and its preparation, and can solve problems such as low permeability, easy damage, and large internal vapor pressure

Active Publication Date: 2020-08-25
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to conventional loads, the building structure and its components may also be subjected to thermal stress caused by strong dynamic loads caused by explosions or high-temperature environments such as fires, and geopolymer mortar has low permeability. Compared with the traditional cement-based composite materials, the internal vapor pressure is larger and more easily damaged under high temperature conditions. Therefore, it is necessary to provide a cement-based composite material with good high temperature resistance and excellent mechanical properties and durability under long-term high temperature environments. Nanoparticles and Fibers Synergistically Reinforced Geopolymer Mortar

Method used

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  • High-temperature-resistant geopolymer mortar and preparation method thereof
  • High-temperature-resistant geopolymer mortar and preparation method thereof
  • High-temperature-resistant geopolymer mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Weigh raw materials, 500 parts of alkali activator, 400 parts of metakaolin, 150 parts of fly ash, 600 parts of quartz sand, nano-SiO 2 1 part, 0.2 parts of PVA fiber, 100 parts of water, 3 parts of water reducer, 1 part of graphene.

[0043] The preparation method of the high temperature resistant geopolymer mortar of the present embodiment is:

[0044] (1) Dissolve 0.5407g of p-phenylenediamine in 10mL of concentrated hydrochloric acid, stir, and ultrasonically obtain a white suspension, place it in an ice-salt bath with magnetic stirring to fully cool it, and dissolve NaNO 2 solution (0.7527g NaNO 2 dissolved in 4mL water) and NaBF 4 Solution (1.48g NaBF 4 Crystals were dissolved in 4mL water) placed in a refrigerator to cool below 0°C, and NaNO was added dropwise to the system 2 Solution, stirring while dripping, while using starch potassium iodide test paper to detect NaNO 2 Whether it is excessive, as the reaction progresses, the system gradually turns orange...

Embodiment 2

[0048] 510 parts of alkali activator, 430 parts of metakaolin, 180 parts of fly ash, 610 parts of quartz sand, nano-SiO 2 3 parts, 0.8 parts of PVA fiber, 110 parts of water, 3 parts of water reducer, 2 parts of graphene.

[0049] The preparation method of the high temperature resistant geopolymer mortar of the present embodiment is:

[0050] (1) Dissolve 0.5407g of p-phenylenediamine in 10mL of concentrated hydrochloric acid, stir, and ultrasonically obtain a white suspension, place it in an ice-salt bath with magnetic stirring to fully cool it, and dissolve NaNO 2 solution (0.7527g NaNO 2 dissolved in 4mL water) and NaBF 4 Solution (1.48g NaBF 4 Crystals were dissolved in 4mL water) placed in a refrigerator to cool below 0°C, and NaNO was added dropwise to the system 2 Solution, stirring while dripping, while using starch potassium iodide test paper to detect NaNO 2 Whether it is excessive, as the reaction progresses, the system gradually turns orange-red, when the star...

Embodiment 3

[0054] 510 parts of alkali activator, 430 parts of metakaolin, 180 parts of fly ash, 610 parts of quartz sand, nano-SiO 2 1 part, 0.2 parts of PVA fiber, 110 parts of water, 3 parts of water reducer, 2 parts of graphene.

[0055] The preparation method of the high temperature resistant geopolymer mortar of the present embodiment is:

[0056] (1) Dissolve 0.5407g of p-phenylenediamine in 10mL of concentrated hydrochloric acid, stir, and ultrasonically obtain a white suspension, place it in an ice-salt bath with magnetic stirring to fully cool it, and dissolve NaNO 2 solution (0.7527g NaNO 2 dissolved in 4mL water) and NaBF 4 Solution (1.48g NaBF 4 Crystals were dissolved in 4mL water) placed in a refrigerator to cool below 0°C, and NaNO was added dropwise to the system 2 Solution, stirring while dripping, while using starch potassium iodide test paper to detect NaNO 2 Whether it is excessive, as the reaction progresses, the system gradually turns orange-red, when the starc...

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Abstract

The invention discloses high-temperature-resistant geopolymer mortar which is prepared from the following raw materials in parts by mass: 500 to 550 parts of an alkali activator, 400 to 450 parts of metakaolin, 150 to 200 parts of fly ash, 600 to 650 parts of quartz sand, 1 to 5 parts of nano SiO2, 0.2 to 2 parts of PVA fibers, 100 to 130 parts of water, 3 to 5 parts of a water reducing agent and1 to 5 parts of graphene. The preparation method comprises the following steps: modifying graphene, dispersing p-phenylenediamine modified graphene in water under an ultrasonic condition, adding a water reducing agent, dispersing and uniformly stirring to obtain a mixed solution A; and taking stirring metakaolin, fly ash and quartz sand in a stirrer, and adding an alkali activator, the mixed solution A, nano SiO2 and PVA fibers under the condition of continuous stirring to obtain the high-temperature-resistant geopolymer mortar. The geopolymer mortar has good high-temperature resistance, and has excellent mechanical properties and durability in a high-temperature environment for a long time.

Description

technical field [0001] The invention relates to the technical field of mortar, in particular to a high-temperature-resistant polymer mortar and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of China's economy, the appearance of cities has changed with each passing day, and large buildings have sprung up. There are nearly one million existing construction projects in my country, with a construction area of ​​about billions of square kilometers. With the increasing scale of the building, a series of problems in the building structure also follow. Because most of the various structural projects in my country during the service period are in harsh environments such as high cold, high temperature, humidity, overload and industrial production, Buildings have been damaged in varying degrees, such as cracking, spalling, alkali-aggregate reaction, and chlorine salt erosion, which have begun to decrease their mechanical properti...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/02C04B16/06C04B14/02C04B14/06
CPCC04B28/006C04B20/023C04B16/0641C04B14/024C04B14/062C04B2201/50C04B22/062C04B12/04C04B14/106C04B18/08C04B14/06C04B22/002C04B2103/302Y02P40/10
Inventor 张鹏高真王娟魏华赵燕坤寇澜婷孙耀雯王晨冯潇洋
Owner ZHENGZHOU UNIV
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