In the winter when the concrete is prepared by adding polypropylene engineering fibers can effectively change the brittle concrete, easy to break the shortcomings. Why polypropylene engineering fibers have such characteristics? Its physical properties, chemical properties is how, in the concrete is how to change its physical properties?

External conditions: Understandable from two aspects: the morphology of polypropylene engineering fibers in concrete / mortar and the relationship between polypropylene engineering fibers and aggregates.

 Polypropylene engineering fibers in concrete / mortar can be indiscriminately distributed, is related to the polypropylene engineering fibers can play a key role. Regardless of the mechanism of action of polypropylene engineering fibers, polypropylene engineering fibers must be guaranteed to function in a homogeneous, random distribution in the concrete / mortar. As the polypropylene engineering fibers in the production process on the surface of different active agent compatibility treatment, the polypropylene engineering fibers with water evenly dispersed, together with the external force and various concrete aggregate stirring further polypropylene engineering fibers and each Aggregate grip wrapped. Dura polypropylene engineering fibers to facilitate uniform dispersion, is used by all the people who have recognized the product.

       We generally put a small amount of polypropylene engineering fibers into the clear water of the transparent cup for agitation, we can visually find the Dura Polypropylene engineering fibers in a three-dimensional suspension of chaotic dispersion, and will not have a long time to place too much change; and Some similar products may disperse when agitated, but float up into a floc layer soon afterwards. It is reported that any of the latter has the case of polypropylene engineering fibers, the actual preparation of concrete / mortar more difficult to evenly dispersed. This observation and some people put forward "PP engineering fiber layer high stability" approach is similar. Due to the fact that the density of polypropylene fiber is smaller than that of water and polypropylene fiber, the engineering fiber dispersed in water will gradually show the state of delamination and segregation gradually due to the influence of buoyancy and surface activation energy. The different brands of short polypropylene engineering fiber placed in the measuring cup after standing still, measured at different time intervals suspended layer height approach to compare the stability of the method to determine the dispersion of polypropylene engineering fibers. Polypropylene engineering fibers grasping the aggregate situation, is able to play a key role. Polypropylene engineering fibers can grip the aggregate as much as possible to avoid being unplugged when stressed. Different polypropylene engineering fibers made of different standards, under the electron microscope can be seen showing different holding aggregate situation. If adding polypropylene engineering fiber concrete slump without loss, the polypropylene engineering fiber is not decentralized or holding the package is poor, the role of polypropylene engineering fiber can not talk about.

      Internal conditions: Polypropylene engineering fibers can work, but also the mechanical properties of polypropylene engineering fibers themselves. This relationship should be appropriate, not the tensile strength of polypropylene engineering fiber is particularly high in order to produce high blocking effect. Polypropylene engineering fibers in the process of tensile tension deformation occurred, if the ratio is not appropriate, then the tensile strength can not meet the requirements. Of course, due to the limitations of the materials made, the data can only meet the requirements as much as possible. Polypropylene Polypropylene Engineering fiber tensile strength is too large, may lead to increased brittleness.

       Tensile limit is too large, concrete / mortar in polypropylene engineering fibers in the process of deformation may not be able to control the crack. It is understood that Dura polypropylene engineering fiber tensile limit of about 15% has been close to natural polypropylene engineering fibers, the need for a certain control technology to produce. Polypropylene engineering fiber modification is also reflected in this regard. Tensile limit index is also a measure of polypropylene engineering fiber crack can really achieve the role of an indicator.

Shandong Huimin Zhiwei Chemical Fiber Co., Ltd., specializing in the production of polypropylene engineering fibers, welcome to order!