Study on the bond mechanism between Reactive Powder Concrete and steel bars

2010 ◽  
Author(s):  
Fangfang Jia ◽  
Mingzhe An ◽  
Decheng Kong
Keyword(s):  
Reactive Powder Concrete ◽  
Steel Bars ◽  
Reactive Powder ◽  
Bond Mechanism

scholarly journals Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5027
Author(s):  
Hanbing Liu ◽  
Xiang Lyu ◽  
Yuwei Zhang ◽  
Guobao Luo ◽  
Wenjun Li
Keyword(s):  
Basalt Fiber ◽  
Steel Corrosion ◽  
Corrosion Process ◽  
Electrochemical Methods ◽  
Reactive Powder Concrete ◽  
Interface Damage ◽  
Steel Bars ◽  
Corrosion Behaviors ◽  
Reactive Powder ◽  
Concrete Interface

Basalt fiber (BF) is a new anti-corrosion and environmentally friendly material, which is expected to delay the corrosion process of steel bars and improve the durability of reinforced reactive powder concrete (RPC). The electrochemical method is a nondestructive testing and real-time monitoring technique used to characterize the corrosion behaviors of steel bars embedded in concrete structures. In this paper, the electrochemical technique was employed to evaluate the corrosion of steel bars embedded in basalt fiber modified reactive powder concrete (BFRPC). Besides, crack and steel-concrete interface damage (SCID) were considered as typical factors that affect steel corrosion in concrete. Thus, both reinforced fiber-free RPC and BFRPC specimens with crack and SCID were prepared for evaluating the steel corrosion behaviors by electrochemical methods. The results revealed that both crack and SCID would aggravate the steel corrosion, and the crack was the major factor that affects the corrosion process. Moreover, the excellent compactness of BFRPC and the bridging action of BF could effectively prevent the concrete cracking and steel corrosion process of concrete. Using reinforced BFRPC instead of ordinary concrete in practical projects could greatly extend the service life of steel bars.

scholarly journals Flexural Strength and Acoustic Damage Characteristics of Steel Bar Reactive Powder Concrete

2021 ◽  
Vol 11 (15) ◽  
pp. 7017
Author(s):  
Tingyou Yi ◽  
Hua Wang ◽  
Juntao Xie ◽  
Wensheng Wang
Keyword(s):  
Flexural Strength ◽  
Fracture Process ◽  
Average Frequency ◽  
Bending Test ◽  
Reactive Powder Concrete ◽  
Shear Cracks ◽  
Tensile Cracks ◽  
Steel Bar ◽  
Steel Bars ◽  
Reactive Powder

In this paper, the steel bar was used to prepare steel bar reactive powder concrete (SBRPC). The three-point bending test was adopted to investigate the effect of the number of steel bars on the flexural strength of SBRPC. The acoustic emission (AE) was used to monitor the fracture process of SBRPC in real time. In addition, the parameter RA and AF ratio (RF) was defined to analyze the distribution of shear cracks and tensile cracks during the fracture process. The experimental results showed that with the increases in the number of the steel bar, the flexural strength of SBRPC gradually increased. The fracture stage of SBRPC can be accurately divided according to the curve slope change in hits and cumulative counts. Moreover, the early warning of SBRPC damage can be realized by observing the amplitude of the AE amplitude value. The dynamic changes in the rising angle (RA) and average frequency (AF) values can be used to determine the cracks mode and fracture mode. Based on the results of RF analysis, adding steel bars will improve the proportion for tensile cracks during its fracture process.

Fatigue behavior of unbonded prestressed reactive powder concrete beams after creep

2020 ◽  
Vol 62 (9) ◽  
pp. 951-956
Author(s):  
Luo Xuguo ◽  
Tan Zheng Long ◽  
Y. Frank Chen
Keyword(s):  
Concrete Beams ◽  
Fatigue Behavior ◽  
Reactive Powder Concrete ◽  
Reactive Powder

Analysis of Two Cross Arm of Reactive Powder Concrete Pole Design with Structure Materials in Civil Engineering

2012 ◽  
Vol 568 ◽  
pp. 39-42
Author(s):  
Yu Zhuo Jia ◽  
Li Lin
Keyword(s):  
Mechanical Properties ◽  
Stress State ◽  
Structural Analysis ◽  
Transmission Line ◽  
Operating Conditions ◽  
Reactive Powder Concrete ◽  
Analysis Software ◽  
Technical Performance ◽  
Reduced Height ◽  
Reactive Powder

SAP2000 structural analysis software is used to designed two of 500kV partially prestressed reactive powder concrete pole cross arm; moreover, poles of the two cross arm program have been compared. The results show that the triangular truss cross arm has good mechanical properties, improving the main mate’rial of the stress state, the pole reduced height 10m, by the analysis of the structure shows, this cross arm has higher reliability under the operating conditions, which can be used in 500kV transmission line; from economic and technical performance, the pole cost of this program is greatly reduced, while speeding up the construction progress and improving the comprehensive benefits of the poles in the transmission line.

Tests on Mechanical Properties and Anti-Penetration Performance of Steel-Fiber Reactive Powder Concrete

2013 ◽  
Vol 671-674 ◽  
pp. 1761-1765
Author(s):  
Yong Liu ◽  
Chun Ming Song ◽  
Song Lin Yue
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Reactive Powder Concrete ◽  
Calculation Results ◽  
Reactive Powder ◽  
Penetration Tests

In order to get mechanical properties ,some RPC samples with 5% steel fiber are tested, many groups data were obtained such as compressive strength, shear strength and fracture toughness. And a group of tests on RPC with 5% steel-fiber under penetration were also conducted to validate the performance to impact. The penetration tests are carried out by the semi-AP projectiles with the diameter of 57 mm and earth penetrators with the diameter of 80 mm, and velocities of the two kinds of projectiles are 300～600 m/s and 800～900 m/s, respectively. By contrast between the experimental data and the calculation results of C30 reinforced concrete by using experiential formula under penetration, it shows that the resistance of steel-fiber RPC to penetration is 3 times as that of general C30 reinforced concrete.

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