Water dispersion type fibre and method for making same

Abstract

The invention discloses a moisture dispersible fibre which comprises the following components by weight: fibre, 60-80 portions; water with the hardness of 0.02-1.50mmol / L, 20-40 portions; dispersing agent, 0.1-0.5 portions; antifoaming agent, 0.1-0.6 portions; and mouldproof bactericides, 0.1-0.4 portions. With the invention, uniform dispersion of the fibre in the concrete can be realized without lowering and damage of various performances of the fibre, and the overall performance of the concrete is excellent, thereby engineering quality requirements can be met; fibre dispersion has high security and long storage time, and can not only be mixed and used in field but also be mixed and stored for further use; simultaneously the fibre dispersion is safe to use with no influence on the health of workers, the addition is accurate and the dosing of concrete water mixed is saved.

Description

【Technical field】 [0001] The invention relates to a water-dispersed fiber, in particular to a dispersion liquid formed in water of the fiber used for concrete reinforcement and a preparation method thereof. 【Background technique】 [0002] Concrete is the most widely used and used building material in contemporary times. However, its low tensile strength, easy cracking, high brittleness, poor deformation performance is not conducive to earthquake resistance, and its own weight limits its application range and affects the quality of projects. Therefore, light weight, high strength, and improved brittleness have always been the development direction of concrete. The use of fiber reinforcement is an important way to modify concrete. The incorporation of fiber materials can greatly improve the tensile strength, crack resistance, fatigue resistance, fracture toughness and deformation properties of concrete. In the past 20 years, fiber concrete has developed rapidly. The fibers co...

AI Technical Summary

Problems solved by technology

Although polymer fiber reinforced concrete has been widely used in the field of engineering construction, such as in roads, bridges, building retaining walls, embankment reinforcement, etc., how to achieve uniform dispersion of fibers in concrete has always been a problem for people. Difficult, this is because most fibers are non-polar molecules, and water is polar molecules, so it is difficult for fibers to disperse evenly in water

The uneven dispersion of fibers in concrete will not only affect the strength and toughness of concrete, but also cause uneven mechanical strength in different parts of concrete, resulting in a decrease in the overall mechanical properties of concrete. Under certain security risks

At the same time, when the above-mentioned fibers are produced and used, because the fibers are short, they are easy to drift and suspend in the air, and after being inhaled by the human body, they will directly affect the health of the human body, and are prone to various occupational diseases.

[0004] At present, polymer fiber reinforced concrete adopts the method of directly adding fibers during the concrete mixing process, which will easily cause uneven dispersion of fibers in the concrete, and the entire mixing and dispersing process is time-consuming and laborious.

Some foreign developed countries, such as the United States, Japan, and Germany, once used short fibers in order to disperse fibers evenly in concrete, because short fibers are easy to achieve uniform dispersion, but short fibers cannot improve the mechanical properties of concrete very well, so this This approach was soon obsolete

In the UK, C 8 ~C 18 The fibers treated with alkali metal alkyl phosphates are then added to the concrete, which greatly improves the dispersion of the fibers. However, when the concrete samples are tested, we find that the fibers treated with alkali metal alkyl phosphates are aging and their toughness is reduced. Phenomenon