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Method for preparing nano-SiO2 and PVA fiber reinforced polymer mortar

A fiber-reinforced, geopolymer technology is applied in the field of preparation of nano-SiO2 and PVA fiber-reinforced geopolymer mortar to achieve the effects of saving resources and energy, low price and high strength

Inactive Publication Date: 2018-09-18
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above researches 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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  • Method for preparing nano-SiO2 and PVA fiber reinforced polymer mortar
  • Method for preparing nano-SiO2 and PVA fiber reinforced polymer mortar
  • Method for preparing nano-SiO2 and PVA fiber reinforced polymer mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Nanometer SiO 2 and PVA fiber reinforced polymer mortar preparation raw materials

[0026] Prepare nano-SiO in this embodiment 2 And the materials used in PVA fiber reinforced geopolymer mortar 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:

[0027] Metakaolin: The metakaolin produced by Shijiazhuang Chenxing Industrial Co., Ltd. was used in the test, and its chemical composition and physical properties are shown in Table 1 and Table 2.

[0028] Table 1 Main chemical components of metakaolin

[0029]

[0030]

[0031] Table 2 Main physical properties of metakaolin

[0032]

[0033] 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.

[0034] Tab...

Embodiment 2

[0053] Example 2 Nano SiO 2 Mixing ratio design with PVA fiber reinforced geopolymer mortar

[0054] 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 design of the mix ratio, that is, the fixed water-cement ratio, mortar ratio, water glass modulus and gel ratio (alkali activator and gelling agent) Material ratio) and only change the PVA fiber content or nano-SiO 2 dosage.

[0055] 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% by mass of metakaolin in an equal amount, and t...

Embodiment 3

[0064] Example 3 Nano SiO 2 and PVA fiber reinforced geopolymer mortar preparation process

[0065] In the preparation of nano-SiO 2 and PVA fiber-reinforced polymer mortar, to ensure that nano-SiO 2 1. PVA fibers can be evenly distributed and freely dispersed in the matrix, in order to obtain repair mortar materials 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 such as figure 1 shown, the specific steps are as follows:

[0066] (1) Material pretreatment: Weigh raw material water, metakaolin, fly ash, quartz sand, alkali activator, PVA fiber, nano-SiO 2 , water reducing agent;

[0067] (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...

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Abstract

The invention discloses a method for preparing nano-SiO2 and PVA fiber reinforced polymer mortar, belonging to the field of inorganic polymer materials. The method comprises the following steps: stirring pre-treated metakaolin, pulverized fuel ash and quartz sands in a stirrer for 2 minutes; adding alkali-activator under a constant stirring state; continuously stirring for 2 minutes; adding a nano-SiO2 mixed solution, continuously stirring for 2 minutes; and adding PVA fibers twice under a constant stirring situation, stirring for 2 minutes each time to obtain the nano-SiO2 and PVA fiber reinforced polymer mortar. The nano-SiO2 and PVA fiber reinforced polymer mortar has excellent mechanical performance and excellent adhesion characteristic, and has a broad application prospect in the fields of construction, road and bridges, hydraulic engineering, 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 the preparation method of PVA fiber reinforced ground 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 environment or industrial environment have suffered different degrees of corrosion damage, resulting in a decline in the durability of the structure, and many unfavorable hidden dangers, which urgently need local repair and reinforcement. 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. Struc...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B16/06C04B14/06
CPCC04B28/006C04B14/106C04B18/08C04B14/06C04B16/0641C04B14/062C04B2103/302C04B12/04C04B22/062
Inventor 张鹏李清富焦美菊王娟刘晨辉张天航王会娟郑元勋张凯旋付世东
Owner ZHENGZHOU UNIV
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