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Modified UF500 cellulose fiber used for concrete and preparation method thereof

A cellulose fiber and concrete technology, applied in the field of modified UF500 cellulose fiber and its preparation, can solve the problems of not widely used and lack of industry specifications for cellulose fibers, so as to improve the bonding performance, resist microbial attack and oxidative stress , The effect of anti-corrosion and anti-oxidation ability

Inactive Publication Date: 2018-07-27
WUHAN KESILI FIBER MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In construction engineering, the current application of cellulose fibers lacks industry standards and is not widely used.

Method used

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  • Modified UF500 cellulose fiber used for concrete and preparation method thereof
  • Modified UF500 cellulose fiber used for concrete and preparation method thereof
  • Modified UF500 cellulose fiber used for concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of modified UF500 cellulose fiber

[0036] The modified UF500 cellulose fiber raw material in this embodiment is selected from fir trees, and is completed through 7 steps of material selection, pulping, pressing, drying and forming, modification reaction, drying and rolling, as figure 1 shown.

[0037] 1. Preparation materials:

[0038] In this embodiment, fir trees are used as raw materials, and wood raw materials with a length of 20 ± 5 mm in the direction of wood grain, a width greater than 3 mm, and a thickness of 5 ± 1 mm are obtained by peeling and slicing.

[0039] 2. Pulping:

[0040] Fill the pressure vessel with the wood raw material of step (1) and add enough liquid medicine consisting of sodium hydroxide and sodium sulfide to cover the wood chips, heat to 160±10°C, and keep warm for 2 to 3 hours; 30±5%, and the hardness of the final slurry should not be too low, and the potassium permanganate value of the slurry should be kep...

Embodiment 2

[0052] Embodiment 2: concrete performance analysis before and after adding the modified UF500 cellulose fiber of embodiment 1

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Abstract

The invention discloses modified UF500 cellulose fiber used for a concrete and a preparation method thereof. The China fir or broad leaf timber as raw materials to prepare the modified UF 500 cellulose fiber, the fiber average length of fiber filament is 2-3 mm, the fiber average width is 14-70 [mu]m, a specific surface area is (2.45-2.55)*104 cm<2> / g; the fiber tensile strength is 300-950 MPa, the fiber elastic modulus is 8-10 GPa, and the fiber alkali resistance is greater than equal to 90%. The modified UF500 cellulose fiber has natural hydrophilic performance, enhances bonding intensity offiber and a concrete matrix, the fiber filament is uniformly distributed in the concrete base-material, the dispersion performance is good, and no caking is generated. The modified UF500 cellulose fiber can effectively improve the endurance of the concrete matrix material by the fiber, which solves the problems of internal explosion of a concrete product due to an ettringite reaction caused by high standard C50-C80 and clear water concrete hydration heat, and the comprehensive performance such as concrete crack resistance, toughness and endurance can be increased.

Description

technical field [0001] The invention relates to a cement-based composite additive-type functional material, in particular to a modified UF500 cellulose fiber for concrete and a preparation method thereof. Background technique [0002] At present, in the field of construction engineering, adding various types of fibers to concrete is one of the main methods to improve the crack resistance of concrete, improve the impermeability and frost resistance of concrete, and has been widely used in various projects. In the current relevant codes and standards of construction engineering, fibers generally refer to steel fibers, synthetic fibers, etc., but in actual projects, some concrete structures are mixed with cellulose fibers. [0003] The fibers used in construction engineering can be divided into organic fibers and inorganic fibers according to their materials; they can be divided into high elastic modulus fibers and low elastic modulus fibers according to their mechanical proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/513D06M13/395B32B5/02B32B5/26B32B37/10B32B38/16D01C1/00D01B1/00C04B18/24D06M101/06
CPCB32B5/02B32B5/26B32B37/10B32B38/162B32B38/164B32B2262/065B32B2307/714B32B2307/7145B32B2307/7265C04B18/24D01B1/00D01C1/00D06M13/395D06M13/513D06M2101/06Y02W30/91
Inventor 余明思李树婷程成
Owner WUHAN KESILI FIBER MFG CO LTD
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