The Establishment of Ultrasonic-Rebound Curve in Steel Fiber Concrete

2014 ◽  
Vol 578-579 ◽  
pp. 1129-1133
Author(s):  
Cai Song Luo ◽  
Hua Yan Chen ◽  
Xian Shun Bi
Keyword(s):  
Experimental Data ◽  
Fly Ash ◽  
Ultrasonic Velocity ◽  
Compression Strength ◽  
Steel Fiber ◽  
Detection Method ◽  
Ultrasonic Detection ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Set Up

For the application into country point highway of Xiamen to Kunming, a series of the C40 concrete with fly ash and slag have been studied by ultrasonic detection 、rebound detection and compression strength, analyzed the influence of ultrasonic velocity 、rebound value and compression strength with steel fiber content, fly ash and slag, the ultrasonic strength detecting wave of ultrasonic velocity、rebound value and compression strength is set up by regression analysis of the experimental data. The results show that the compression strength 、ultrasonic velocity and rebound value have good relativity, this ultrasonic-rebound detection method used in steel fiber concrete is simple and practical.

Experimental Research of Rebound Detection in Steel Fiber Concrete

2014 ◽  
Vol 578-579 ◽  
pp. 1108-1112 ◽  
Author(s):  
Jian Feng Ye ◽  
Hua Yan Chen ◽  
Xian Shun Bi
Keyword(s):  
Regression Analysis ◽  
Fly Ash ◽  
Experimental Research ◽  
Compression Strength ◽  
Steel Fiber ◽  
Detection Method ◽  
Fiber Concrete ◽  
Testing Data ◽  
Steel Fiber Concrete ◽  
Set Up

For the application into country point highway of Xiamen to Kunming, a series of the C40 concrete with fly ash and slag have been studied by rebound detection and compression strength, the detecting wave of rebound value and compression strength is set up by regression analysis of the testing data. It is shown from the example that the compression strength and rebound value have good relativity, this rebound detection method used in steel fiber concrete is simple and practical.

Simulation and Experimental Study on Temperature Distribution of Mass Steel Fiber Concrete

2010 ◽  
Vol 168-170 ◽  
pp. 1531-1534
Author(s):  
Yu Dong Wang ◽  
Xiao Chun Fan ◽  
Chun Lin Xiang ◽  
Hua Liu
Keyword(s):  
Elastic Modulus ◽  
Temperature Distribution ◽  
Steel Fiber ◽  
High Strength ◽  
Casting Process ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Equation Of Heat Conduction ◽  
Set Up ◽  
Good Agreement

Temperature and elastic modulus of mass steel fiber concrete change as time in casting process. If not well handled, it is easy to crack in the process of construction. In order to hold the temperature distribution of mass high strength concrete in pouring process, we set up the model that meets with engineering characteristics. It is based on the partial differential equation of heat conduction and elastic modulus value from test and cement hydration heat of concrete on site. By contrast, the simulation results are in good agreement with the experimental results.

scholarly journals Numerical simulation of electric heating of dispersed-reinforced concrete with steel fibers

2021 ◽  
Vol 2131 (5) ◽  
pp. 052064
Author(s):  
E Matus ◽  
M Soppa
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Electric Heating ◽  
Contact Layer ◽  
Concrete Mixture ◽  
Study Results ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

Abstract Solution to the problem of current density distribution in a fragment of a steel fiber concrete mixture is obtained, using the finite element method. It is shown that the fiber-concrete contact layer makes a significant contribution to the effective electrical conductivity of the mixture. More than 50% of the total current flows through the reinforcing fibers. The conductivity of the mixture increases in proportion to the reinforcement coefficient. It increases 2-3 times, depending on the choice of the contact properties, reinforcing 2% by volume layer. Experimental data that confirm the indicated dependence are presented. Also, a solution to the problem of heat distribution in a fragment of steel-fiber-concrete mixture in stationary and non-stationary modes of external heating and electrode heating was obtained. It is shown that the effective thermal conductivity coefficient increases in proportion to the reinforcement coefficient. A significant effect of the contact layer parameters on thermal conductivity is shown, comparison with experimental data. Significant heat release in the area of contact zone and in fiber leads to a temperature rise in these zones by 20-30 degrees in a stationary mode. The temperature distribution in fiber-reinforced concrete during induction heating is considered. In this case, it is necessary to significantly increase the frequency of the current used. The study results can be used, prescribing electric heating modes for products made of dispersion-reinforced concrete.

scholarly journals Experimental and theoretical studies of biaxially prestressed steel-fiber-concrete slabs.

2018 ◽  
Vol 2 (3) ◽  
pp. 10-14
Author(s):  
Oleksandr Zhuravskyi ◽  
Andriy Gorobetc
Keyword(s):  
Steel Fiber ◽  
Physical Nonlinearity ◽  
Concrete Slabs ◽  
Theoretical Studies ◽  
Transverse Loading ◽  
Software Complex ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Experimental And Theoretical Studies

The article presents the results of experimental and theoretical studies of strength and deformability of steel-fiber concrete double-sided pre-stress slabs under the action of transverse loading. The simulation of such plates in the software complex LIRA-SAPR was performed taking into account the physical nonlinearity of materials.

scholarly journals Numerical simulation and experiment on steel fiber concrete beams

2019 ◽  
Vol 1425 ◽  
pp. 012007 ◽  
Author(s):  
Thanh Quang Khai Lam ◽  
Dung Do Thi My ◽  
Van Thuc Ngo ◽  
Trong Chuc Nguyen ◽  
Trong Phuoc Huynh
Keyword(s):  
Numerical Simulation ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Simulation And Experiment

scholarly journals Influence of steam curing on properties of fiber-reinforced concrete during hardening

2018 ◽  
Vol 251 ◽  
pp. 01031
Author(s):  
Vadim Soloviev ◽  
Marsel Nurtdinov ◽  
Sergey Belikov ◽  
Evgeniy Matyushin
Keyword(s):  
Steel Fiber ◽  
Mechanical Performance ◽  
Thermal Capacity ◽  
Fiber Reinforced Concrete ◽  
Steam Curing ◽  
Curing Conditions ◽  
Production Stage ◽  
Concrete Production ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

To increase the efficiency of steel-fiber concrete production, the existing technological operations that could reduce the costs should be optimized. This process requires scientific research and analysis of the existing results to improve the efficiency of each production stage. One of the important stages in the steel-fiber concrete production is steam curing, which is responsible for forming the cementitious matrix structure. To increase the efficiency of this production stage, a study was conducted to develop the steam curing conditions according to the rules of steel-fiber concrete structure formation and the methods of improving durability indicators. Tests on several steel-fiber concrete compositions were conducted, and the relations between its thermal conductivity and the reinforcement coefficient of concrete were revealed. The results of the tests let us conclude that with the increase of the reinforcement coefficient its thermal capacity decreases. The temperature gradient charts along the cross-section of samples with different cement/sand ratios and reinforcement coefficients were built. According to the data obtained, the optimal industrial conditions of steam curing were discovered. The dependences determining the increase of mechanical performance of steel-fiber concrete due to the formation of prestressed fiber structure in the material were revealed.

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