Change in the physical properties of plaster composites reinforced with carbon fibers.
Topic(s) : Material science
Co-authors :
Alžbeta SAMKOVÁ (CZECH REPUBLIC), Miroslava PECHOČIAKOVÁ (CZECH REPUBLIC), Veronika TUNAKOVAAbstract :
Due to the continually growing demand for materials with high specific stiffness, strength, and the ability to selectively influence their key properties, composite materials are currently experiencing significant expansion across all industrial sectors. The properties of composite materials can be tailored to meet the requirements of modern construction applications, enabling efficient technical solutions in challenging and changing operational conditions. Composite materials have now become part of the construction industry, commonly used in the construction of bridges, facades, roof structures, tunnels, and other buildings. Fiber reinforcement is increasingly utilized in such composites to enhance the strength, resilience, and durability of structures against static and dynamic loads.
The aim of this article is to assess whether the desired improvement in physical properties also occurs in fiber-reinforced structural materials.
This study initially focuses on evaluating changes in the mechanical properties of cement composite. Selected plaster mixtures is commonly used in construction structures. Dispersions of carbon fibers with a fiber length of 8 mm were added to the matrices used. The fiber content in the selected matrices was 1, 2, and 3 wt%.
The humidity of the indoor environment has a significant impact on the health and comfort of occupants. Relative humidity (RH) influences the perception of indoor air quality and thermal comfort. If the RH value is too low or, conversely, too high, there is an increased risk of developing allergies and other illnesses. Therefore, there is an effort to maintain an optimal RH value indoors (in the range of 40 – 60%). In the case of higher RH values (above 80%), not only biological growth may occur, but in some cases, it can lead to a shortened expected lifespan of the specific building material. For these reasons, it was appropriate to test the influence of the amount of fiber reinforcement on the water transport in plaster composites.
The modern development in electronics, particularly in wireless and communication systems, brings many advantages to everyday life. However, it is also important to be aware that these advancements lead to an increased presence of electromagnetic waves in our surroundings. Excessive exposure to these waves can have negative effects on human health. Therefore, for a material to have the ability to shield electromagnetic fields, it must be electrically conductive. Carbon fibers fulfill this requirement, and thus, the ability of the composite to shield electromagnetic fields was tested.
The aim of this article is to assess whether the desired improvement in physical properties also occurs in fiber-reinforced structural materials.
This study initially focuses on evaluating changes in the mechanical properties of cement composite. Selected plaster mixtures is commonly used in construction structures. Dispersions of carbon fibers with a fiber length of 8 mm were added to the matrices used. The fiber content in the selected matrices was 1, 2, and 3 wt%.
The humidity of the indoor environment has a significant impact on the health and comfort of occupants. Relative humidity (RH) influences the perception of indoor air quality and thermal comfort. If the RH value is too low or, conversely, too high, there is an increased risk of developing allergies and other illnesses. Therefore, there is an effort to maintain an optimal RH value indoors (in the range of 40 – 60%). In the case of higher RH values (above 80%), not only biological growth may occur, but in some cases, it can lead to a shortened expected lifespan of the specific building material. For these reasons, it was appropriate to test the influence of the amount of fiber reinforcement on the water transport in plaster composites.
The modern development in electronics, particularly in wireless and communication systems, brings many advantages to everyday life. However, it is also important to be aware that these advancements lead to an increased presence of electromagnetic waves in our surroundings. Excessive exposure to these waves can have negative effects on human health. Therefore, for a material to have the ability to shield electromagnetic fields, it must be electrically conductive. Carbon fibers fulfill this requirement, and thus, the ability of the composite to shield electromagnetic fields was tested.