Mechanical Properties of Concrete Made with Recycled Tire and Silica Fume

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Saadatkhosh Masoud; DEHGHAN MOHAMMAD SADEGH; Bohloli Farzin; Arezoumandi Mehdi; Karimaei Tabarestani Mojtaba

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Journal: Modares Civil Engineering journal Year:2021 | Volume:21 | Issue:3 Page(s): 107-118

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Title

Mechanical Properties of Concrete Made with Recycled Tire and Silica Fume

Author(s)

Saadatkhosh Masoud | DEHGHAN MOHAMMAD SADEGH | Bohloli Farzin | Arezoumandi Mehdi | Karimaei Tabarestani Mojtaba

Keywords

Concrete

Recycled tire

Silica fume

Compressive strength

Tensile strength

Abstract

One of the most critical issues in the world is the disposal of waste materials. The expansion of the automotive industry has led to the existence of used tires as one of the environmental pollutants in recent decades. The global growth of the automobile industry and the increase in the use of cars as the main means of transportation has led to production of large accumulations of used tires. These solid wastes decompose very slowly and produce many pollutants such as insect growth. Recently, there has been an increasing trend toward the use of sustainable materials. Sustainability helps the environment by reducing the consumption of non-renewable natural resources. Concrete –,the second most consumed material in the world after water –,uses a significant amount of non-renewable resources. Efforts aimed at producing environmentally friendly Concrete can play a major role in securing sustainable construction. Candidate technologies for sustainable Concrete materials include the incorporation of supplementary cementitious materials (SCMs) such as, Silica fume as a partial replacement for Portland cement,the incorporation of recycled materials in Concrete production. As a result, an experimental investigation was conducted to study the mechanical properties of Concrete made with 10% and 15% Recycled tire rubber (fine and coarse) as well as 6% Silica fume. This experimental program consisted of ten mix designs. (1) Control samples with natural aggregates and without Silica fume, (2) Samples with natural aggregates and 6% Silica fume (S6), (3) Samples with 10% replacement of coarsegrained Recycled tire rubber by weight without Silica fume (C10), (4) Samples with 10% replacement of coarsegrained Recycled tire rubber by weight and 6% Silica fume (C10S6), (5) Samples with 15% replacement of coarse-grained Recycled tire rubber by weight without Silica fume (C15), (6) Samples with 15% replacement of coarse-grained Recycled tire rubber by weight and 6% Silica fume (C15S6), (7) Samples with 10% replacement of fine-grained Recycled tires by weight without Silica fume (F10), (8) Samples with 10% replacement of fine-grained recycled tier rubber by weight and 6% Silica fume (F10S6), (9) Samples with 15% replacement of fine-grained recycled tier rubber by weight without Silica fume (F15) and finally (10) Samples with 15% replacement of fine-grained recycled tier rubber by weight and 6% Silica fume (F15S6). According to the experiments carried out and the comparison of the obtained results with the important regulations as well as the available data from previous studies, the following results are achieved: (1) Adding Silica fume to Concrete due to its pozzolanic properties has increased the Compressive strength compared to conventional Concrete up to 17%. Furthermore, it has a significant effect on Tensile strength and increases Tensile strength by more than 23%. (2) Replacement of natural aggregate with coarse-grained Recycled tire rubber for 10 and 15% by weight has resulted in a 33 and 45% reduction in Compressive strength compared to conventional Concrete after curing time of 28 days, respectively. Addition of Silica fume to these samples reduced the reduction percentage to 8% and 30%, respectively. (3) Replacement of natural aggregate with fine-grained Recycled tire rubber for 10 and 15 percent results in 42 and 54% reduction in Compressive strength after curing time of 28 days compared to conventional Concrete. The addition of Silica fume to these samples has reduced the reduction percentage to about 30%. (4) The Tensile strength of Concrete made with coarsegrained Recycled tire rubber of 10 and 15% by weight, respectively, has decreased by 3 and 13% after curing time of 28 days compared to conventional Concrete. Furthermore, adding 6% Silica fume to these samples has reduced the reduction percentage to about 10%. (5) Tensile strength of Concrete with fine-grained Recycled tire rubber of 10 and 15% by weight, respectively, has decreased by 23 and 38% after curing time of 28 days compared to conventional Concrete. Furthermore, adding 6% of Silica fume to these samples reduced it by 3% and 30%, respectively. (6) Tensile strength relationships presented in US, European and AASHTO regulations were conservative for 35%, 85% and 20% of present data for Concrete made with Recycled tire rubber and for Japan, Australia and CEB-FIP regulations 100% of data were conservative. (7) Statistical studies show that 100% of the Tensile strength data for Concrete made with Recycled tire is in the range of 95% of data for conventional Concrete.

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APA: Copy

Saadatkhosh, Masoud, DEHGHAN, MOHAMMAD SADEGH, Bohloli, Farzin, Arezoumandi, Mehdi, & Karimaei Tabarestani, Mojtaba. (2021). Mechanical Properties of Concrete Made with Recycled Tire and Silica Fume. MODARES CIVIL ENGINEERING JOURNAL, 21(3 ), 107-118. SID. https://sid.ir/paper/1036786/en

Vancouver: Copy

Saadatkhosh Masoud, DEHGHAN MOHAMMAD SADEGH, Bohloli Farzin, Arezoumandi Mehdi, Karimaei Tabarestani Mojtaba. Mechanical Properties of Concrete Made with Recycled Tire and Silica Fume. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2021;21(3 ):107-118. Available from: https://sid.ir/paper/1036786/en

IEEE: Copy

Masoud Saadatkhosh, MOHAMMAD SADEGH DEHGHAN, Farzin Bohloli, Mehdi Arezoumandi, and Mojtaba Karimaei Tabarestani, “Mechanical Properties of Concrete Made with Recycled Tire and Silica Fume,” MODARES CIVIL ENGINEERING JOURNAL, vol. 21, no. 3 , pp. 107–118, 2021, [Online]. Available: https://sid.ir/paper/1036786/en

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