Experimental and Statistical Investigation to Evaluate Impact Strength Variability and Reliability of Preplaced Aggregate Concrete Containing Crumped Rubber and Fibres

Experimental and Statistical Investigation to Evaluate Impact Strength Variability and Reliability of Preplaced Aggregate Concrete Containing Crumped Rubber and Fibres

The proper disposal of used rubber tires has emerged as a primary concern for the environment all over the globe. Millions of tires are thrown away, buried and discarded every year, posing a major environmental concern owing to their slow decomposition. As a result, it is advantageous to use recycle...

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Published in:Materials Vol. 15; no. 15; p. 5156
Main Authors: Swaminathan, Packirisamy, Karthikeyan, Kothandapani, Subbaram, Siva Ramakrishnan, Sudharsan, Jayaraman Sethuraman, Abid, Sallal R., Murali, Gunasekaran, Vatin, Nikolai Ivanovich
Format: Journal Article
Language:English
Published: Basel MDPI AG 25-07-2022
MDPI
Subjects:
Aggregates
Cement
Compressive strength
concrete
Concrete aggregates
Density
Dilution
Ethanol
Failure
fibres
Gravity
Impact strength
Impact tests
Investigations
Mechanical properties
reliability
Reliability analysis
Rubber
rubber waste
Sodium hydroxide
Statistical analysis
Statistical methods
Steel fibers
Tensile strength
Tires
Weibull distribution
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Summary:The proper disposal of used rubber tires has emerged as a primary concern for the environment all over the globe. Millions of tires are thrown away, buried and discarded every year, posing a major environmental concern owing to their slow decomposition. As a result, it is advantageous to use recycled waste rubber aggregates as an additional building resource. Recycling crushed rubber would lead to a long-term solution to the problem of decreasing natural aggregate resources while conserving the environment. This study examines the impact strength variability and reliability of preplaced aggregate concrete containing crumped rubber and fibres. Ten different mixtures were prepared by replacing natural aggregate with crumped rubber (5, 10, 15 and 20%). The crumped rubber was pretreated by the water with sodium hydroxide dilution for 30 min before usage. Hooked-end steel fibres were used at a dosage of 1.5%. The compressive strength, impact strength, impact ductility index and failure pattern were examined and discussed. In addition, a statistical method called Weibull distribution is used to analyze the scattered experimental results. The results showed that when the crumb rubber content was raised, the retained first cracking and failure impact numbers increased. As a result of substituting crumb rubber for 20% of the coarse aggregate in plain and fibrous mixes, the percentage development in first crack and failure was between 33% and 76% and 75% to 129%, respectively.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma15155156