Experimental investigation on chloride-ion penetration resistance of slag containing fiber-reinforced concrete under drying-wetting cycles

2020 ◽  
pp. 121829
Author(s):  
Weige Chen ◽  
Haitang Zhu ◽  
Zhenhao He ◽  
Lin Yang ◽  
Liangping Zhao ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Chloride Ion ◽  
Penetration Resistance ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Chloride Ion Penetration ◽  
Ion Penetration

scholarly journals The Chloride Ion Penetration Mechanism in Basalt Fiber Reinforced Concrete under Compression after Elevated Temperatures

2021 ◽  
Vol 11 (21) ◽  
pp. 10137
Author(s):  
Limin Lu ◽  
Shaohua Wu ◽  
Yuwen Qin ◽  
Guanglin Yuan ◽  
Qingli Zhao ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperatures ◽  
Coupling Effect ◽  
Basalt Fiber ◽  
Chloride Ion ◽  
Fiber Reinforced Concrete ◽  
Ion Permeability ◽  
Ion Content ◽  
Chloride Ion Penetration ◽  
Ion Penetration

Chloride ion penetration frequently leads to steel corrosion and reduces the durability of reinforced concrete. Although previous studies have investigated the chloride ion permeability of some fiber concrete, the chloride ion permeability of the basalt fiber reinforced concrete (BFRC) has not been widely investigated. Considering that BFRC may be subjected to various exposure environments, this paper focused on exploring the chloride ion permeability of BFRC under the coupling effect of elevated temperatures and compression. Results demonstrated that the chloride ion content in concrete increased linearly with temperature. After exposure to different elevated temperatures, the chloride ion content in BFRC varied greatly with increasing stress. The compressive stress ratio threshold for the chloride ion penetration was measured. A calculation model of BFRC chloride ion diffusion coefficient under the coupling effect of elevated temperatures and mechanical damage (loading test) was proposed.

scholarly journals Mechanical and Durability Characteristics of Latex-Modified Fiber-Reinforced Segment Concrete as a Function of Microsilica Content

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Woong Kim ◽  
Ri-On Oh ◽  
Joo-Ha Lee ◽  
Mi-Sol Kim ◽  
Sang-Min Jeon ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Impact Resistance ◽  
Chloride Ion ◽  
Penetration Resistance ◽  
Synthetic Fiber ◽  
Fiber Reinforced ◽  
Synthetic Fibers ◽  
Chloride Ion Penetration ◽  
Ion Penetration

This study evaluated the performance of latex-modified fiber-reinforced concrete (RC) segments as a function of the substitution level of microsilica and type of reinforced fiber, to address the problem of corrosion of steel segments and steel-reinforced fiber segments, which are commonly used to shield tunnel-boring machine (TBM) tunnels in urban spaces. Our study compared macro synthetic, steel, and hybrid (macro synthetic fiber + polypropylene fiber) reinforcing fibers. The substitution levels of microsilica used were 0, 2, 4, and 6%. The target strengths were set at 40 and 60 MPa to test compressive strength, flexural strength, chloride ion penetration resistance, and impact resistance. Testing of latex-modified and fiber-reinforced segment concrete showed that the compressive strength, flexural strength, and chloride ion penetration resistance increased with an increasing substitution level of microsilica. These improvements were attributed to the densification of the concrete due to filling micropores with microsilica. Micro synthetic fiber was more effective in terms of improved compressive strength, flexural strength, and chloride ion penetration resistance than steel fiber. These results were due to the higher number of micro synthetic fibers per unit volume compared with steel fiber, which reduced the void volume and suppressed the development of internal cracks. The optimal microsilica content and fiber volume fraction of micro synthetic fiber were 6% and 1%, respectively. To evaluate the effects of the selected mixtures and hybrid fibers simultaneously, other mixing variables were fixed and a hybrid fiber mixture (combination of macro synthetic fibers and polypropylene fibers) was used. The hybrid fiber mixture produced better compressive strength, flexural strength, chloride ion penetration resistance, and impact resistance than the micro synthetic fibers.

Penetration Resistance Research of Fiber Reinforced RPC

2014 ◽  
Vol 1055 ◽  
pp. 23-26
Author(s):  
Can Xu
Keyword(s):  
Reinforced Concrete ◽  
Coarse Aggregate ◽  
Steel Fiber ◽  
Penetration Resistance ◽  
Fiber Content ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Quartz Powder ◽  
Steel Fiber Reinforced Concrete

In the original to remove steel and steel fiber reinforced concrete coarse aggregate in quartz powder and a small amount of activator, can boost steel fiber content, and its application in construction makes it more convenient, but how the penetration resistance works is not particularly clear. Through the penetration resistance experiment, found that when joined the SF and BF, RPC can still keep complete even after three times by penetration ,indicating the good performance of penetration resistance.

scholarly journals Experimental investigation of fiber reinforced concrete using septage ash

2020 ◽  
Vol 872 ◽  
pp. 012177
Author(s):  
A Siva Krishna ◽  
E Vamshi Krishna ◽  
S Yeshwanth Kumar ◽  
T Sony ◽  
G Shiva Narayana
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced
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