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Nanometer SiO2 and PVA (polyvinyl alcohol) fiber reinforced geopolymer mortar

A fiber-reinforced, geopolymer technology, applied in the field of nano-SiO2 and PVA fiber-reinforced geopolymer mortar, to achieve low permeability, strengthen impermeability, and improve the effect of early compression resistance

Inactive Publication Date: 2018-11-27
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above studies are carried out on cement-based mortars, and there are few reports on the bonding properties of geopolymer mortars to concrete and steel bars.

Method used

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  • Nanometer SiO2 and PVA (polyvinyl alcohol) fiber reinforced geopolymer mortar
  • Nanometer SiO2 and PVA (polyvinyl alcohol) fiber reinforced geopolymer mortar
  • Nanometer SiO2 and PVA (polyvinyl alcohol) fiber reinforced geopolymer mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Nanometer SiO 2 and PVA fiber reinforced polymer mortar preparation raw materials

[0021] Prepare nano-SiO in this embodiment 2 The materials used for geopolymer mortar reinforced with PVA fiber mainly include water, metakaolin, fly ash, water glass, sodium hydroxide, quartz sand, PVA fiber, nano-SiO 2 , water reducing agent, etc., the performance indicators of the raw materials used meet the test requirements, as follows:

[0022] Metakaolin: The test uses metakaolin produced by Shijiazhuang Chenxing Industrial Co., Ltd., and its chemical composition and physical properties are shown in Table 1 and Table 2.

[0023] Table 1 Main chemical components of metakaolin

[0024]

[0025] Table 2 Main physical properties of metakaolin

[0026]

[0027] Fly ash: Class I fly ash produced by Datang Luoyang Thermal Power Co., Ltd. was used in the test of the present invention. The main physical properties are shown in Table 3.

[0028] Table 3 main physical pr...

Embodiment 2

[0048] Example 2 Nano SiO 2 Mixing ratio design with PVA fiber reinforced geopolymer mortar

[0049] The embodiment of the present invention investigates PVA fiber dosage, nano-SiO 2 The effect of doping factor on nano-SiO 2 and PVA fiber-reinforced geopolymer mortar mechanical properties, so the control variable method is used in the mix ratio design, that is, the fixed water-cement ratio, cement-sand ratio, water glass modulus and gel ratio (alkali activator and gel Material ratio) and only change the PVA fiber content or nano-SiO 2 dosage.

[0050] The optimum proportioning and consumption of NaOH and water glass required for polymer synthesis of the embodiment of the present invention compound ratio design, the water-to-cement ratio (the ratio of the water contained in the added water and the alkali activator to the gelled material mass) is determined to be 0.65, The mortar ratio is 1:1. Fly ash replaces 30% quality metakaolin in an equal amount, and the alkali activa...

Embodiment 3

[0059] Example 3 Nano SiO 2 and PVA fiber reinforced geopolymer mortar preparation process

[0060] In the preparation of nano-SiO 2 and PVA fiber-reinforced polymer mortar, to ensure that nano-SiO 2 , PVA fibers can be evenly distributed and freely dispersed in the matrix, in order to obtain a repair mortar material with good mechanical properties, in order to meet the test requirements, it is necessary to choose a suitable preparation method and process, nano-SiO 2 And PVA fiber reinforced geopolymer mortar composite molding process concrete steps are as follows:

[0061] (1) Material pretreatment: Weigh raw material water, metakaolin, fly ash, quartz sand, alkali activator, PVA fiber, nano-SiO 2 , water reducing agent;

[0062] (2) Nano SiO 2 and PVA fiber-reinforced polymer mortar: the metakaolin, fly ash and quartz sand in step (1) were stirred in a mixer for 2 minutes, and under the condition of constant stirring, an alkali activator was added, and the stirring was ...

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Abstract

The invention discloses nanometer SiO2 and PVA (polyvinyl alcohol) fiber reinforced geopolymer mortar, and belongs to the field of inorganic polymeric materials. The nanometer SiO2 and PVA fiber reinforced geopolymer mortar comprises water, metakaolin, fly ash, quartz sand, alkali activators, PVA fibers, nanometer SiO2 and water reducing agents. The nanometer SiO2 and PVA fiber reinforced geopolymer mortar has the advantages of good mechanical property, excellent bonding characteristics and broad application prospect in the fields of buildings, roads and bridges, water conservation, military science and the like.

Description

technical field [0001] The invention relates to the field of inorganic polymer materials, in particular to a nano-SiO 2 And PVA fiber reinforced polymer mortar. Background technique [0002] Concrete and mortar are widely used materials in hydraulic engineering and civil engineering, and play a key role in engineering construction. With the passage of time, many concrete structures in humid environments or industrial environments have suffered corrosion damage to varying degrees, resulting in a decline in the durability of the structures and many unfavorable hidden dangers. Local repairs and reinforcements are urgently needed. According to data, cracking is common in domestic tunnel linings using concrete, and according to statistics, the cracking length accounts for about one-fifth of the total length; about half of the industrial and civil buildings have a serious aging period, and a large number of buildings have durability problems. Structural building collapse acciden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/20C04B111/34
CPCC04B28/006C04B2111/00017C04B2111/20C04B2111/2038C04B2111/343C04B2201/50C04B14/106C04B18/08C04B22/00C04B22/062C04B14/06C04B14/062C04B16/0641C04B2103/302Y02P40/10
Inventor 张鹏王娟李清富王会娟刘晨辉张天航焦美菊郑元勋付世东张凯旋
Owner ZHENGZHOU UNIV
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