An investigation on the structural properties of concrete with expanded polystyrene (EPS) and flyash

Date of Publication


Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Civil Engineering with Specialization in Structural Engineering

Subject Categories

Civil Engineering


Gokongwei College of Engineering


Civil Engineering

Thesis Adviser

Andres Winston Oreta

Defense Panel Chair

Adam C. Abinales

Defense Panel Member

Lessandro Estelito O. Garciano

Frederick Francis M. Sison


The dead load due to the weight of conventional concrete has always been the lead cause for high earthquake loads in a structure. In light of the need to greater lessen the weight of concrete, a concrete mixture composing of expanded polystyrene (EPS) and flyash powder is proposed. Although a number of researches applications have been done on the use of EPS as lightweight aggregates to produce lightweight concrete, these researches focused on non-structural members such as walls and partitions. EPS is a lightweight materials made from plastic and are bead-shaped while flyash is a byproduct of coal combustion and has cementitious characteristics.

EPS is partially substituted as fine aggregates with varying percentage of 10%, 15%, 25%, 30%, and 50% of the total volume of sand white flyash will be added as an admixture with volume of 9% that of the cement. The EPS is meant to greatly lessen the weight while the flyash is meant to produce a better bond between the materials by filling up the voids in the mixture.

The proposed EPS-flyash concrete is tested on a prototype residential structure. The EPS-flyash concrete cylinders tested showed a decrease in unit weight having a compressive strength above the required strength properties of the EPS-flyash concrete by testing the concrete in flexure using plain and reinforced concrete beams and by testing the splitting tensile strength of the concrete using concrete cylinders.

Abstract Format






Accession Number


Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

xiv, 141 leaves : illustrations (some color) ; 30 cm.


Structural engineering; Concrete; Cement

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