Preparation method of nano-silica and steel fiber reinforced concrete

A nano-silica, reinforced concrete technology, applied in the field of inorganic polymer materials, can solve the problems of insufficient understanding of impact, limited application, lack of attention to maintenance and repair, etc., and achieve good performance results

Inactive Publication Date: 2019-10-22
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, due to the lack of comprehensive and thorough research on the road performance of cement concrete in the early stage, on the other hand, people have insufficient understanding of the impact of harsh environments on concrete, and do not pay attention to maintenance and repair after completion, resulting in a large number of problem

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  • Preparation method of nano-silica and steel fiber reinforced concrete
  • Preparation method of nano-silica and steel fiber reinforced concrete
  • Preparation method of nano-silica and steel fiber reinforced concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 Nano silicon dioxide and steel fiber reinforced concrete raw material

[0026] The raw materials for preparing nano silicon dioxide and steel fiber reinforced concrete in the present invention mainly include gravel, river sand, cement, nano SiO 2 , steel fiber, high-efficiency water reducer, fly ash and water, all the technical indicators of the raw materials used meet the requirements. The specific parameters and testing indicators are as follows:

[0027] (1) cement

[0028] The cement used in the experimental study of the present invention is the P.I42.5 rotary kiln portland cement produced by Shandong Lucheng Cement Co., Ltd., and its main technical index detection values ​​are as shown in table 1:

[0029] Table 1 Main technical indicators of cement

[0030]

[0031] (2) fly ash

[0032] The fly ash used in the experimental study of the present invention is a first-class fly ash, and each detection index is as shown in table 2:

[0033] Table 2 ...

Embodiment 2

[0061] Embodiment 2 nano-silica and steel fiber reinforced concrete mix design

[0062] The test of the present invention is to add nano-SiO in concrete 2 and steel fiber, to study the influence of the amount of the two on the road performance of concrete, including basic mechanical properties, impact resistance, chloride ion penetration resistance, and frost resistance. According to the research design, choose to fix the water-binder ratio and sand rate, and only change nano-SiO 2 Dosage and steel fiber dosing.

[0063] The test of the present invention is based on the concrete mix ratio design rules, and the design reference concrete compressive strength grade is C45. nano-SiO 2 Replace cement according to the quality of 1%, 2%, 3%, 4%, 5%; keep nano-SiO 2 The dosage is 3%, and the steel fiber is mixed into the concrete according to the ratio of 0.5%, 1.0%, 1.5%, 2.0%, and 2.5% as the volumetric dosage.

[0064] The amount of each material per cubic meter of concrete is...

Embodiment 3

[0069] The preparation technology of embodiment 3 nano silicon dioxide and steel fiber reinforced concrete

[0070] Concrete is made by mixing cement, sand, stone, water, and admixtures in a certain proportion. There are two main reasons that affect its strength and other properties. The first is the quality of raw materials. The raw materials used have been inspected above, and the raw materials used are qualified; the second is the concrete construction technology and process control, which is also the key to the success of the test. Steel fiber and nano-SiO 2 In the process of reinforced concrete preparation, nano-SiO 2 The uniform dispersion of steel and steel fibers is the key point to ensure the quality of concrete, and it is also the basis for concrete to have excellent properties.

[0071] In order to ensure the uniform dispersion of fibers and nanomaterials, it is necessary to select the appropriate incorporation method and sequence. For the steel fiber used in the...

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Abstract

Belonging to the field of inorganic polymeric materials, the invention discloses a preparation method of a nano-silica and steel fiber reinforced concrete. The method includes: weighing aggregate, cement, a water reducing agent, fly ash, water, nano-SiO2 and steel fiber; adding the nano-SiO2 and the water reducing agent into part of the water, and mixing the substances evenly for standby use; wetting a mixer, then adding coarse aggregate and fine aggregate, performing mixing, then adding the cement and fly ash, conducting mixing, and then incorporating the steel fiber evenly along the mixer impeller rotation direction, performing mixing, then adding the mixture of the nano material, the water reducing agent and part of water, performing stirring, adding the residual water, and conducting mixing, thus obtaining the nano-silica and steel fiber reinforced concrete. By blending a specific amount of fiber and nano material into concrete, the method provided by the invention can prepare thenovel composite material fiber reinforced nano-concrete, which has the characteristics of high ductility, good compactness, good durability, etc., and meets the performance requirements of the concrete for bridge deck pavement.

Description

technical field [0001] The invention relates to the field of inorganic polymer materials, in particular to a preparation method of nano silicon dioxide and steel fiber reinforced concrete. Background technique [0002] As the most widely used building material, cement concrete has many advantages that other materials do not have. For example, high strength, good processability, good water stability and thermal stability, rich raw material resources and easy mixing, so it has been widely used in airport roads, high-grade bridges, etc. In terms of road application, foreign cement concrete pavements account for a large proportion of high-grade highways, reaching 30% in the United States, 25% in Japan, and 50% in Belgium, showing excellent road performance during use and reaching designed service life. In recent years, China's high-grade cement concrete pavement has achieved certain development, but the proportion is still very low. In terms of bridge pavement, with the massi...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/06C04B14/02C04B14/062C04B14/48C04B2103/302
Inventor 张鹏王娟李清富郑元勋焦美菊赵士坤
Owner ZHENGZHOU UNIV
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