Synthetic fiber for multifunctional mortar concrete and method for preparing the same

Abstract

The invention discloses a multifunctional synthesized fiber used for mortar concrete and a corresponding preparation method; wherein, the synthesized fiber is composed of the following components: 0.1 to 10.0 percent of interface modifier provided with surface-treatment effect, 0.1 to 5.0 percent of wetting agent and 85.0 to 99.0 percent of polymer. The preparation method comprise the steps as follows: the polymer is firstly put into a mixing machine, and then the wetting agent is added to obtain a mixture which is stirred well, and then the interface modifier is added to obtain a new mixture which is stirred well to be prepared into master batches; the obtained master batches are mixed with polymers to spin fiber. The surface of the synthesized fiber prepared by the invention has certain hydrophilic and the fiber has better dispersity in concrete; the interface modifier provided with surface-treatment effect provides physical roughness for the fiber surface to reinforce cohesive force between the fiber and base materials; the interface modifier also takes part in hydration reaction so as to enhance the interface capability between the fiber and base materials. Therefore, the synthesized fiber prepared by the invention can reduce or restrict the early plastic cracking of mortar concrete, enhance the interface capability between the fiber and base materials and improve the anti-impact capability of mortar concrete.

Description

technical field [0001] The present invention relates to a modified synthetic fiber. Specifically, the present invention designs a multi-functional fiber for improving the crack resistance of concrete, improving the interface performance between synthetic fiber and base material, and improving the performance of synthetic fiber reinforced mortar or concrete. Synthetic fibers for shaped concrete, and methods for their manufacture. Background technique [0002] Both mortar and concrete are widely used building materials, and are currently developing in the direction of high performance, functionality, and high durability. In order to meet these requirements, a new type of mortar concrete admixture has also been continuously developed, which plays a very important role in improving the performance of mortar concrete and improving the quality of the project. Synthetic fibers are also increasingly valued and developed as secondary reinforcements in mortar concrete. [0003] Synt...

AI Technical Summary

Problems solved by technology

The disadvantages of this modification method are: the existence of the nucleating agent causes the crystal form of the fiber to change during the stretching process, causing the volume of the fiber to shrink, so pores are left in the fiber after stretching, but the size and distribution of the pores cannot be controlled. Causes the inhomogeneity of fiber performance; on the other hand, because the fiber is Y-shaped cross-section, it is difficult to maintain good mechanical properties, and its elastic modulus is low

[0023] As can be seen from the above known methods of modifying synthetic fibers, the research of the prior art all focuses on improving the fiber dispersibility and improving the interfacial performance between the fiber-substrate, mainly through the use of surfactant coating, Chemical oxidation or grafting, high-energy radiation and adding calcium carbonate powder to make the fiber have a certain degree of hydrophilicity and a moderately rough surface, so that the fiber has better dispersion and interfacial bonding performance, but in the modification method Some of the shortcomings, affecting the production efficiency and industrial production

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