the elastic modulus of steel fiber reinforced concrete (sfrc) with random distribution of aggregate and fiber

Authors

reza saleh jalali

assistant prof., dept. of civil eng., faculty of eng., university of guilan, po box 3756, rasht, iran emran shadafza

ms student, dept. of civil eng., faculty of eng., university of guilan, po box 3756, rasht, iran

abstract

the present paper offers a meso-scale numerical model to investigate the effects of random distribution of aggregate particles and steel fibers on the elastic modulus of steel fiber reinforced concrete (sfrc). meso-scale model distinctively models coarse aggregate, cementitious mortar, and interfacial transition zone (itz) between aggregate, mortar, and steel fibers with their respective material properties. the interfaces between fibers and mortar have been assumed perfectly bonded. random sampling principle of monte carlo's simulation method has been used to generate the random size, orientation, and position of aggregate particles as well as steel fibers in concrete matrix. a total of 2100 two-dimensional and three-dimensional cube specimens (150 mm) with varying volume fractions of aggregate and fiber have been randomly generated. the commercial code abaqus has been used to analyze the specimens under tensile loading and the calculated elastic modulus has been compared to other analytical and experimental values. results indicate that the non-homogeneity of the matrix and random distribution of aggregate and fibers manage to disperse calculated efficiency factor of fiber with a standard deviation of 2.5% to 3.0% (for 150 mm cube specimens, it can be different for other specimens). nevertheless, the mean value of the calculated efficiency factor agrees well with the value, recommended by hull (1981), for uniformly-distributed fibers, equal to 0.353, and 0.151 for two and three-dimensional models respectively.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

The Elastic Modulus of Steel Fiber Reinforced Concrete (SFRC) with Random Distribution of Aggregate and Fiber

The present paper offers a meso-scale numerical model to investigate the effects of random distribution of aggregate particles and steel fibers on the elastic modulus of Steel Fiber Reinforced Concrete (SFRC). Meso-scale model distinctively models coarse aggregate, cementitious mortar, and Interfacial Transition Zone (ITZ) between aggregate, mortar, and steel fibers with their respective materi...

full text

Some Studies on Steel Fiber Reinforced Concrete

Fibres are generally used as resistance of cracking and strengthening of concrete. In this project, I am going to carry out test on steel fibre reinforced concrete to check the influence of fibres on flexural strength of concrete. According to various research papers, it has been found that steel fibres give the maximum strength in comparison to glass and polypropylene fibres. Hence, in this pr...

full text

Optimizing of Steel Fiber Reinforced Concrete Mix Design

Cementitious matrices are the fragile materials that possess a low tensile strength. The addition of fibers randomly distributed in these matrices improves their resistance to cracking, substantially. However, the incorporation of fibers into a plain concrete disrupts the granular skeleton and quickly causes problems of mixing as a result of the loss of mixture workability that will be translat...

full text

freeze and thaw, and abrasion resistance of steel fiber reinforced concrete (sfrc)

an experimental program was carried out to investigate the behavior of steel, fiber reinforced concrete (sfrc) under abrasion and cycles of freeze and them. compression and flexural tests were also performed in order to reach a comprehensive conclusion of the response. in total, over 200 specimens were tested the test variables included two concrete strength., (i. e., 28 mpa as normal strength ...

full text

Retrofitting of Reinforced Concrete Beams with Steel Fiber Reinforced Composite Jackets

In the present study, a new method for retrofitting reinforced concrete beam is introduced in which steel-concrete composite jackets containing steel fiber is used. For this purpose, 75% of the peripheral surface of reinforced concrete beams was initially reinforced using steel plates and bolts, and steel fiber reinforced concrete was used between the steel plates and the peripheral surfaces of...

full text

The Effects of Aggregate Sizes and Fiber Volume Fraction on Bending Toughness and Direct Tension of Steel Fiber Reinforced Concrete

Twisted 0.375 30 80 2,300 1 Abstract—In order to supplement the brittle property of concrete, fibers are added into concrete mixtures. Compared to general concrete, various characteristics such as tensile strength, bending strength, bending toughness, and resistance to crack are superior, and even when cracks occur, improvements on toughness as well as resistance to shock are excellent due to t...

full text

My Resources

Save resource for easier access later


Journal title:
civil engineering infrastructures journal

جلد ۴۹، شماره ۱، صفحات ۲۱-۳۲

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023