Mechanical Properties of Polyamide Fiber-Reinforced Lime–Cement Concrete

Mohammad Mostafa Jafari, Soheil Jahandari, Togay Ozbakkaloglu, Haleh Rasekh, Danial Jahed Armaghani () and Aida Rahmani
Additional contact information
Mohammad Mostafa Jafari: Department of Civil Engineering, Technical and Vocational University (TVU), Tehran 1435761137, Iran
Soheil Jahandari: Chem Concrete Pty Ltd., Seven Hills, NSW 2147, Australia
Togay Ozbakkaloglu: Department of Civil Engineering, Texas State University, San Marcos, TX 78666, USA
Haleh Rasekh: School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
Danial Jahed Armaghani: School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
Aida Rahmani: Chem Concrete Pty Ltd., Seven Hills, NSW 2147, Australia

Sustainability, 2023, vol. 15, issue 15, 1-19

Abstract: Lime–cement concrete (LCC) is a type of lime-based concrete in which lime and cement are utilized as the main binding agents. This type of concrete has been extensively used to construct support layers for shallow footings and road backfills in some warm regions. So far, there has been no systematic research conducted to investigate the mechanical characteristics of polyamide fiber-reinforced LCC. To address this gap, LCC specimens were prepared with 0%, 0.5%, 1%, and 2% of polyamide fibers (a synthetic textile made of petroleum-based plastic polymers). Specimens were then cured for 3, 7, and 28 days at room and oven temperatures. Then, the effects of the fibers’ contents, curing conditions, and curing periods on the mechanical characteristics of LCC, such as secant modulus, deformability index, bulk modulus, shear modulus, stiffness ratio, strain energy, failure strain, strength ratio, and failure patterns, was investigated. The results of the unconfined compressive strength (UCS) tests showed that specimens with 1% fiber had the highest UCS values. The curing condition and curing period had significant effects on the strength of the LCC specimens, and oven-cured specimens developed higher UCS values. The aforementioned mechanical properties of the LCC specimens and the ability of the material to absorb energy significantly improved when the curing period under the oven-curing condition was increased, as well as through the application of fibers in the mix design. Based on the test results, a simple mathematical model was also established to forecast the mechanical properties of fiber-reinforced LCC. It is concluded that the use of polyamide fibers in the mix design of LCC can both improve mechanical properties and perhaps address the environmental issues associated with waste polyamide fibers.

Keywords: lime-based concrete; mechanical characteristics; fiber reinforcement; curing conditions; curing periods (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/15/11484/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/15/11484/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:15:p:11484-:d:1201707

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().