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A kind of concrete containing modified fiber and its preparation method

A technology for modifying fiber and concrete, which is applied in the field of concrete, which can solve the problems of poor alkali resistance, low stability, and short life of bamboo fiber, and achieve the effects of excellent light resistance, improved acid corrosion resistance, and extended service life

Active Publication Date: 2021-08-24
厦门捷航工程检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What adopted in the embodiment 1 of above-mentioned patent is ordinary portland cement, and ordinary portland cement is to be main raw material with limestone and clay, so its pH after hardening is alkaline, yet bamboo fiber is relatively stable to acid. Small, when the temperature rises, the destructive effect of the acid is particularly strong, the swelling and dissolution of the bamboo fiber in the alkali is strong, and the alkali resistance of the bamboo fiber is poor. Therefore, after the bamboo fiber fails, the mechanical strength of the above concrete will decrease. Will be greatly reduced, short life

Method used

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  • A kind of concrete containing modified fiber and its preparation method
  • A kind of concrete containing modified fiber and its preparation method
  • A kind of concrete containing modified fiber and its preparation method

Examples

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Embodiment 1

[0054]Embodiment 1: A kind of concrete containing modified fibers, the composition and weight ratio of its raw materials are shown in Table 1. Among them, the cement is ordinary Portland cement with a strength grade of P.O42.5; the water reducer is a standard high-performance water reducer purchased from Kezhijie New Material Group Co., Ltd.; the fly ash is purchased from Hou For the Class II (Class F) fly ash of Shishi Power Plant, the ore powder is S95 ore powder purchased from Sangang Group (Longhai) Mine Micro Powder Co., Ltd., and the silica fume is purchased from Xiamen Yulin Technology Co., Ltd.

[0055] The modified polyacrylonitrile fiber includes polyacrylonitrile fiber and a corrosion-resistant coating sprayed on the surface of the polyacrylonitrile fiber. The thickness of the corrosion-resistant coating is 40-50 μm, and the length of the modified polyacrylonitrile fiber is 8 ± 1mm. The diameter is 20 μm.

[0056] The raw material of corrosion-resistant coating com...

Embodiment 2-5

[0074] Example 2-5: A concrete containing modified fibers, the difference from Example 1 lies in the composition and weight ratio of its raw materials as shown in Table 1.

[0075] The composition of raw material and its weight ratio in table 1 embodiment 1-5

[0076]

Embodiment 6

[0077] Example 6: A concrete containing modified fibers, the difference from Example 1 is that the thickness of the corrosion-resistant coating is 45 μm.

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Abstract

The invention discloses a modified fiber-containing concrete and a preparation method thereof, and relates to the technical field of concrete. The technical points are: the composition and weight ratio of the raw materials of concrete containing modified fibers are as follows: cement 450-500kg / m 3 ;Water 140‑160kg / m 3 ;Sand 1200‑1300kg / m 3 ;Water reducer 15‑20kg / m 3 ; Fly ash 75‑85kg / m 3 ; Mineral powder 110‑130kg / m 3 ; Silica fume 110‑130kg / m 3 ; Modified polyacrylonitrile fiber 0.6‑1kg / m 3 ; The modified polyacrylonitrile fiber includes polyacrylonitrile fiber and a corrosion-resistant coating sprayed on the surface of the polyacrylonitrile fiber. The invention improves the alkali corrosion resistance of the polyacrylonitrile fiber, prolongs the service life of the concrete, and simultaneously improves the flexural strength, crack resistance and compressive strength of the concrete.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a modified fiber-containing concrete and a preparation method thereof. Background technique [0002] With the growing national economy and international influence of our country, in order to strengthen the connection and cooperation between regions, many large-scale infrastructure constructions such as crossing the sea and crossing the river are being carried out day by day, and the application of marine concrete is also attracting more and more attention from all over the world. In order to pursue higher and stronger concepts, the design of many sea-crossing bridges also follows the principles of elevation, high durability, and high carrying capacity. However, marine concrete serves in the harsh environment of the ocean, and has been subjected to seawater scouring, wave splashing and long-term corrosion by Cl-, Mg2+, SO42- plasma. Under the coupling effect of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B16/06C04B20/10
CPCC04B16/0658C04B20/1033C04B28/04C04B2201/50C04B22/002C04B14/06C04B2103/302C04B18/08C04B18/146C04B18/141C04B20/1022
Inventor 苏宁张铠谢志煌
Owner 厦门捷航工程检测技术有限公司
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