Chloride Ion Penetrability of HPFRCC after Loading

2014 ◽  
Vol 507 ◽  
pp. 242-244
Author(s):  
Kyung Joon Shin
Keyword(s):  
Crack Width ◽  
High Performance ◽  
Concrete Structures ◽  
Chloride Ion ◽  
Cementitious Composite ◽  
Fiber Reinforced ◽  
High Performance Fiber ◽  
Inherent Problem ◽  
Durability Performance

Cracking is one of the most important factors in the serviceability as well as durability performance of concrete structures. Recently, it was recognized that a high performance fiber-reinforced cementitious composite (HPFRCC) provides a possible solution to this inherent problem of cracking by smearing one or several dominant cracks into many distributed microcracks. The purpose of the present study is to explore the ductility characteristics of HPFRCC. The permeability of HPFRCC after subjected to different load levels were measured to identify the effect of reduced cracking among the mixtures. It was confined that the permeability of proposed mixtures was lower than that without microfibers. This means that the proposed materials can reduce the crack width greatly at the same applied loads

Chloride Ion Diffusion Coefficient of HPFRCC after Loading

2014 ◽  
Vol 898 ◽  
pp. 391-394
Author(s):  
Kyung Joon Shin
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Chloride Ion ◽  
Fiber Reinforced Concrete ◽  
Chloride Diffusion ◽  
Fiber Reinforced ◽  
Ion Diffusion ◽  
High Performance Fiber ◽  
Inherent Problem ◽  
Chloride Ion Diffusion

Various methods have been used to reinforce cementitious material such as mortar and concrete that have weak tensile strength. Fiber Reinforced Concrete is one of the reinforcing methods that mixes a matrix with fibers that have strong tensile strength. Recently, High Performance Fiber Reinforced Cementitious Composites (HPFRCC) have been developed. HPFRCC provides a possible solution to this inherent problem of cracking by smearing one or several dominant cracks into many distributed microcracks. The present study explores the ductility characteristics of HPFRCC by measuring chloride diffusion coefficients after load is applied.

scholarly journals Performance of Cracked Ultra-High-Performance Fiber-Reinforced Concrete Exposed to Dry-Wet Cycles of Chlorides

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Longlong Niu ◽  
Shiping Zhang
Keyword(s):  
Reinforced Concrete ◽  
Flexural Strength ◽  
High Performance ◽  
Chloride Ion ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Self Healing ◽  
Fiber Reinforced ◽  
High Performance Fiber ◽  
Corrosion Of Steel

This paper presents an experimental study on the performance of cracked ultra-high-performance fiber-reinforced concrete (UHPC) exposed to dry-wet cycles of 3.5% NaCl solution under the temperature of 60°C. The results show that the wider the crack, the higher the corrosion degree of steel fibers embedded in UHPC, and the deeper the chloride ion diffusion on both sides of the crack. With the increase of dry-wet cycles, the flexural strength of precracked UHPC first decreases and then increases, and the lowest flexural strength was observed in 60 dry-wet cycles. Although self-healing is hard to cease the corrosion of steel fibers, it can relieve the corrosion of steel fibers and improve the flexural strength exposed to 100 dry-wet cycles.

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