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 low tensile strength, limited application, no attention to maintenance and repair, etc., and achieve good performance results

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

AI Technical Summary

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 problems in bridge deck pavement concrete.
[0004] The shortcomings of cement concrete itself, which is brittle and has low tensile strength, greatly limit its application in bridge deck pavement. In order to solve this problem, the present invention proposes a scheme for compounding concrete materials, and prepares a new type of bridge Concrete for paving

Method used

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  • Nano-silica and steel fiber reinforced concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 Nano silicon dioxide and steel fiber reinforced concrete raw material

[0021] 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:

[0022] (1) cement

[0023] 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:

[0024] Table 1 Main technical indicators of cement

[0025]

[0026] (2) fly ash

[0027] 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:

[0028] Table 2 ...

Embodiment 2

[0055] Embodiment 2 nano-silica and steel fiber reinforced concrete mix design

[0056] 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.

[0057] 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.

[0058] The amount of each material per cubic meter of concrete is s...

Embodiment 3

[0062] The preparation technology of embodiment 3 nano silicon dioxide and steel fiber reinforced concrete

[0063] 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.

[0064] 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 nano-silica and steel fiber reinforced concrete. The concrete comprises the following raw materials: 150-180 parts ofaggregate, 40-45 parts of cement, 0.1-4 parts of a water reducing agent, 5-10 parts of fly ash, 15-25 parts of water, 1-5wt% of nano-SiO2 and 0.5-2.5% by volume of steel fiber. By adding a specific amount of fiber and nano materials into the concrete, the novel composite material fiber reinforced nano-concrete can be prepared, and the concrete 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 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 massive construction of high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/02C04B14/062C04B14/48C04B2103/302C04B18/08
Inventor 张鹏李清富王娟焦美菊郑元勋赵士坤
Owner ZHENGZHOU UNIV
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