Mechanical behavior of self-compacting concrete pavements incorporating recycled tire rubber crumb and reinforced with polypropylene fiber

In this study, the specimens of cemented sand were prepared by reinforcing it separately with different contents (0.5%, 1.0%, 1.5%, and 2.0%) of three different polymer fibers (polyamide, polyester, and polypropylene) prepared as filaments of different lengths (6, 9, and 12 mm). Then, these specimens were tested, and the improvement effects of the three fibers on the engineering-mechanical behavior of the cemented sand were analyzed and compared. The different microstructures and chemical compositions of the fiber-reinforced cemented sand specimens were investigated using electron microscopy and X-ray diffraction. Compression tests were performed to obtain the stress-strain curves of the specimens. Comparative analysis was performed on the variation patterns of the mechanical parameters (such as unconfined compressive strength and peak strain) of the specimens. Quantitative analysis was performed on the effect of fiber content and fiber filament length on the failure mode of the specimens. It was shown that the inclusion of fibers led to a change from brittle failure to ductile failure. The macro- and microexperimental results revealed that polypropylene fiber had the best improvement effect on the mechanical behavior of the cemented sand, followed by polyester fiber and polyamide fiber. In particular, the cemented sand specimen reinforced with 1.5% polypropylene fiber prepared as 9 mm length filaments had a brittleness index of 0.0578, exhibited ductile failure (in contrast to the brittle failure of the nonreinforced cemented sand), and yielded the highest unconfined compressive strength and shear strength among the specimens.

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Corrigendum to “Microstructural, thermal, physical and mechanical behavior of the self compacting concrete containing SiO2 nanoparticles” [Mater. Sci. Eng. A 527 (2010) 7663–7672]

Materials Science and Engineering A ◽

10.1016/j.msea.2010.10.023 ◽

2011 ◽

Vol 528 (4-5) ◽

pp. 2200

Author(s):

Ali Nazari ◽

Shadi Riahi

Keyword(s):

Mechanical Behavior ◽

Sio2 Nanoparticles ◽

The Self ◽

Self Compacting Concrete

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The Effect of Polypropylene Fiber on the Mechanical Properties of Self-Compacting Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.168-170.1325 ◽

2010 ◽

Vol 168-170 ◽

pp. 1325-1329

Author(s):

Ye Ran Zhu ◽

Jun Cai ◽

Dong Wang ◽

Guo Hong Huang

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Polypropylene Fiber ◽

Flexural Properties ◽

Test Results ◽

Self Compacting Concrete ◽

Bending Tests ◽

Flexural Toughness ◽

Four Point Bending

This paper investigates the mechanical properties (compressive strength, splitting tensile strength and flexural toughness) of polypropylene fiber reinforced self-compacting concrete (PFRSCC). The effect of the incorporation of polypropylene fiber on the mechanical properties of PFRSCC is determined. Four point bending tests on beam specimens were performed to evaluate the flexural properties of PFRSCC. Test results indicate that flexural toughness and ductility are remarkably improved by the addition of polypropylene fiber.

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Recycled Rubber as an Aggregate Replacement in Self-Compacting Concrete—Literature Overview

Materials ◽

10.3390/ma11091729 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1729 ◽

Cited By ~ 16

Author(s):

Robert Bušić ◽

Ivana Miličević ◽

Tanja Šipoš ◽

Kristina Strukar

Keyword(s):

Coarse Aggregate ◽

Impact Resistance ◽

Ecological Problem ◽

Self Compacting Concrete ◽

Tire Rubber ◽

Waste Tire ◽

Waste Tire Rubber ◽

Sand And Gravel ◽

Near Future ◽

Recycled Waste

In the past few decades, due to the exponential increase of the world’s population, the number of discarded waste tires has become a serious ecological and environmental problem. Decomposition of waste tire rubber can take longer than 50 years, and every year the number of discarded tires is rapidly growing. With the inclusion of waste tire rubber into self-compacting concrete this global problem can be reduced. Waste tire rubber can be incorporated in self-compacting concrete by partially replacing the natural fine and coarse aggregate, reducing consumption of sand and gravel and preserving these natural materials. In addition, recycling and reusing waste tire rubber avoids the need for tire landfilling, as one of the major ecological problem of the near future. Replacement of natural aggregate with waste tire rubber can have an undesirable influence on the mechanical properties of self-compacting concrete, i.e., compressive strength, flexural strength, splitting tensile strength, and modulus of elasticity, however. On the other hand, replacing natural gravel or sand with waste tire rubber can improve impact resistance, ductility, and fatigue resistance. This paper presents an overview of the literature investigating recycled waste tire rubber used as a fine and/or coarse aggregate replacement in self-compacting concrete and its influence on several essential fresh and hardened self-compacting concrete properties.

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