College - Author 1
College of Architecture and Environmental Design
Department - Author 1
Architectural Engineering Department
Degree Name - Author 1
BS in Architectural Engineering
College - Author 2
College of Architecture and Environmental Design
Department - Author 2
Architectural Engineering Department
Degree - Author 2
BS in Architectural Engineering
College - Author 3
College of Architecture and Environmental Design
Department - Author 3
Architectural Engineering Department
Degree - Author 3
BS in Architectural Engineering
Date
6-2024
Primary Advisor
Peter Laursen, College of Architecture and Environmental Design, Architectural Engineering Department
Abstract/Summary
The objective of this project is to discover a structurally effective method in repurposing recyclable plastic waste through its partial substitution for traditional fine aggregate in concrete.
Results obtained from analysis indicate a 25 percent compressive strength reduction with polypropylene at a 10 percent partial substitution for total sand content. This material successfully performed as an alternative, presenting a ductile mode of failure.
Three material alternatives - polypropylene, polyethylene, and rubber - were substituted for a percentage of sand. These materials underwent concrete cylinder crushing tests to determine their ultimate crushing strength, with the intent of identifying the most effective substitute.
A secondary set of concrete cylinder tests proportioned different percentages of the independent variable (polypropylene) as a substitute. Results obtained from these tests indicate the mix design for concrete cast beams, from which the analysis results are derived. This beam experienced a 10% reduction in flexural capacity compared to a similar beam made of typical concrete. The beam section remained tension-controlled, as required by ACI 318-19 9.3.3.1.
This alternative mix design promotes sustainable building practices and can be utilized as a reduced-strength concrete for beams, slabs, and foundations.
URL: https://digitalcommons.calpoly.edu/arcesp/207