scholarly journals AN EXPERIMENTAL STUDY ON FUNDAMENTAL MECHANICAL PROPERTIES OF SLURRY INFILTRATED FIBER CONCRETE WITH SYNTHETIC FIBERS

2015 ◽  
Vol 69 (1) ◽  
pp. 604-610
Author(s):  
Makoto YAMAGUCHI ◽  
Kiyoshi MURAKAMI ◽  
Koji TAKEDA ◽  
Ayumi SATOH
2019 ◽  
Vol 1 (6) ◽  
pp. 503-508
Author(s):  
Tharunkumar N ◽  
Anand G

The present investigation addresses the external strengthening of reinforced concrete (RC) T-beams using jute fiber laminates. An experimental study is mainly carried out to study the change in structural behaviour of RC T-beams using externally wrapped jute fiber laminates, to enhance the shear and flexural capacity of the beams. The effect of pattern and orientation of the strengthening fabric on the shear capacity of the strengthened beams will be examined. RC T-beams with minimum shear reinforcement is designed and then external confinement using jute fiber laminates is carried out using epoxy resin. The layer confinement is executed to study and analyze the behaviour of confined beams with respect to control beam. Experimental results showing the advantage of beam strengthened using the various lay-ups of jute fiber are to be discussed. For all developed composites, experimental results revealed that the tensile properties of the developed composites are strongly dependent on the tensile strength of jute fiber and that the tensile properties of jute fiber are very much defect sensitive. Jute as a natural fiber is eco-friendly, low cost, versatile in textile fields and has moderate mechanical properties, which replaced several synthetic fibers in development of many composite materials. However, the hydrophilic nature of the jute fiber affects the mechanical properties of the developed composites. As a result to arrest crack and improve the strength of beam.


2021 ◽  
Vol 5 (4) ◽  
pp. 110
Author(s):  
Flaminio Sales ◽  
Andrews Souza ◽  
Ronaldo Ariati ◽  
Verônica Noronha ◽  
Elder Giovanetti ◽  
...  

Polydimethylsiloxane (PDMS) is a polymer that has attracted the attention of researchers due to its unique properties such as transparency, biocompatibility, high flexibility, and physical and chemical stability. In addition, PDMS modification and combination with other materials can expand its range of applications. For instance, the ability to perform superhydrophobic coating allows for the manufacture of lenses. However, many of these processes are complex and expensive. One of the most promising modifications, which consists of the development of an interchangeable coating, capable of changing its optical characteristics according to some stimuli, has been underexplored. Thus, we report an experimental study of the mechanical and optical properties and wettability of pure PDMS and of two PDMS composites with the addition of 1% paraffin or beeswax using a gravity casting process. The composites’ tensile strength and hardness were lower when compared with pure PDMS. However, the contact angle was increased, reaching the highest values when using the paraffin additive. Additionally, these composites have shown interesting results for the spectrophotometry tests, i.e., the material changed its optical characteristics when heated, going from opaque at room temperature to transparent, with transmittance around 75%, at 70 °C. As a result, these materials have great potential for use in smart devices, such as sensors, due to its ability to change its transparency at high temperatures.


2021 ◽  
Vol 287 ◽  
pp. 123019
Author(s):  
Jianmin Hua ◽  
Fei Wang ◽  
Lepeng Huang ◽  
Neng Wang ◽  
Xuanyi Xue

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