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Fair-faced concrete

A technology of fair-faced concrete and cement, which is applied in the field of building materials and can solve the problems of reducing the durability of fair-faced concrete, poor crack resistance, and poor durability.

Inactive Publication Date: 2020-08-21
QINGDAO QINGJIAN NEW MATERIAL GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Poor crack resistance
[0005] (3) poor durability
When there are surface defects and cracks in the fair-faced concrete structure, it is easy to cause chloride ion penetration and erosion of concrete, carbonization, freeze-thaw, sulfate reaction, alkali-aggregate reaction, steel bar corrosion and concrete drying shrinkage and other deterioration effects to occur, reducing the durability of fair-faced concrete.

Method used

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preparation example Construction

[0059] The preparation method of the fair-faced concrete is not particularly limited in the present invention, and it can be prepared by a preparation method well known to those skilled in the art.

[0060] In order to further illustrate the present invention, below in conjunction with example the fair-faced concrete provided by the present invention is described in detail, but they can not be interpreted as the limitation of protection scope of the present invention.

[0061] Raw materials used:

[0062] Alkaline electrolyzed water: by K 2 CO 3 The electrolyte solution is electrolyzed in a fully automatic diaphragm electrolyzed water machine, and the permeability of the ion exchange membrane in the electrolyzed water machine is 0.2cc / cm 2 Min, the power supply for electrolysis is pulsed direct current, the voltage is 380V, 50Hz, the current is 19A, the temperature of the incoming water is 20°C, the flow rate of the incoming water is 25L / h, and the electrolysis time is 15min...

Embodiment 1

[0071] Fair-faced concrete mix ratio design research scheme of the present invention is as follows:

[0072] (1) Preliminarily adopt different cementitious material systems, and determine the test water consumption by controlling the slump, so as to prepare a fair-faced concrete system with a strength grade of C60.

[0073] (2) According to the "Technical Regulations for the Application of Fair-faced Concrete" (JGJ169-2009), a reasonable cementitious material system was designed. Due to comprehensive factors such as crack resistance and color difference, the test adopted both a large-volume mineral admixture system and a The system using only mineral admixture and pure cement is shown in Table 6.

[0074] Table 6 cementitious material system

[0075]

[0076] On the basis of analyzing the existing design method of fair-faced concrete mix ratio, according to the characteristics of clear-water concrete and the design idea of ​​fair-water concrete mix ratio, a special design ...

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Abstract

The invention provides a fair-faced concrete, belongs to the technical field of building materials, and concretely provides a fair-faced concrete containing alkaline electrolyzed water. The influenceof factors such as the water-binder ratio, the admixture mixing amount and the age on the strength, the crack resistance and the durability of the concrete is changed, the mix proportion design of thefair-faced concrete is optimized, and the cement consumption is reduced, so a green, efficient, low-cost, non-toxic and pollution-free facing fair-faced concrete preparation technology is realized, and the purpose of meeting the requirements of fair-faced, high-durability and economic concrete is achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to fair-faced concrete. Background technique [0002] Fair-faced concrete is a delicate material. By optimizing the traditional production process and construction methods, a smooth surface, uniform color and energetic shape can be obtained. Although the application of fair-faced concrete technology in urban construction has become more and more extensive, and the appearance and types are becoming more and more mature, there are still many deficiencies: [0003] (1) Defects in appearance quality. Appearance quality defects caused by raw materials and mix ratio problems will directly affect the quality and expected effect of fair-faced concrete to a large extent. Fair-faced concrete is cast in one time, without any decoration on the surface, and more emphasis on surface effect and appearance quality, so it cannot be like Like ordinary concrete, post-decoration can be use...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B22/00C04B111/20C04B111/22C04B111/26
CPCC04B22/002C04B28/04C04B2111/20C04B2111/22C04B2111/26C04B2111/29C04B18/08C04B18/141C04B14/06C04B14/02C04B2103/302
Inventor 李长江王亮李秋义刘桂宾于琦陈旭许冬李浩然
Owner QINGDAO QINGJIAN NEW MATERIAL GRP CO LTD
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