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Method for enhancing adhesive property of geopolymer composite material and reinforcing steel bar

A technology of geopolymers and composite materials, applied in the direction of analytical materials, preparation of test samples, and measuring devices, etc., can solve problems such as cumbersome modeling process, large amount of calculation, and complex bond-slip relationship

Pending Publication Date: 2021-05-18
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods all use the bond-slip relationship as the constitutive of the connecting element, but the modeling process is cumbersome and the calculation is large, and the bond-slip relationship between the steel bar and the concrete is very complicated, which is not only related to the strength of the concrete, the diameter of the steel bar , constraint coefficient and other factors, and also involves complex variables such as position function

Method used

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  • Method for enhancing adhesive property of geopolymer composite material and reinforcing steel bar
  • Method for enhancing adhesive property of geopolymer composite material and reinforcing steel bar
  • Method for enhancing adhesive property of geopolymer composite material and reinforcing steel bar

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Embodiment 1

[0053] The invention provides a method for enhancing the bonding performance of a geopolymer composite material and a steel bar, and the specific steps are as follows:

[0054] Step 1. Preparation of Geopolymer Composite Materials

[0055] Raw materials for the preparation of geopolymer composites include: metakaolin, fly ash, sodium silicate solution, quartz sand (with a particle size of 75-120 μm), PVA fibers and nano-SiO 2 .

[0056] Among them, the chemical composition of metakaolin and fly ash is shown in Table 1:

[0057] Table 1

[0058]

[0059] The base activator solution consists of sodium hydroxide NaOH, sodium silicate solution and water. The sodium silicate solution has an initial modulus of 3.2 and a concentration of 40%. Add NaOH to the sodium silicate solution to adjust its modulus from 3.2 to 1.3, and then continue to add water to adjust the mass fraction of sodium oxide in the solution to 15%.

[0060] The admixture uses a water reducing agent with a ...

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PUM

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Abstract

The invention discloses a method for enhancing the adhesive property of a geopolymer composite material and a reinforcing steel bar, which comprises the following steps that an improved mathematical model is established based on a Harajli bond slip model, a finite element numerical model is proposed by adopting a Mori-Tanaka homogenization method and a Tsai-Hill failure criterion, the prediction results of the finite element numerical model and the improved mathematical model are compared and analyzed with the existing Harajli model and the corresponding test result, so that the bond slip behavior of the nano SiO2 and PVA fiber reinforced geopolymer composite material can be effectively predicted.

Description

technical field [0001] The invention relates to the technical field of high-performance polymer composite materials, in particular to a method for enhancing the bonding performance of polymer composite materials and steel bars. Background technique [0002] Because ordinary portland cement composites bring a series of problems such as high resource and high energy consumption and increase in carbon emissions in the production process, and the performance of geopolymers is similar to that of cement and has the advantages of environmental friendliness. , some scholars regard geopolymers as an emerging and promising alternative binder for ordinary Portland cement in the production of mortar or concrete. Although geopolymers have the properties of high strength, rapid development, corrosion resistance and heavy metal solidity, their raw materials are rich in sources, and their production energy consumption is low. They can be applied to new repairs, rapid hardening and early str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N19/04
CPCG01N1/28G01N19/04
Inventor 张鹏高真王珂珣王娟袁鹏亢洛宜
Owner ZHENGZHOU UNIV
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