Civil Engineering ETDs

Publication Date

Spring 3-15-2023

Abstract

One of the critical factors in the development of additive manufacturing in the construction industry is designing suitable materials for 3D printing applications. 3D concrete printing (3DCP) has gained significant attention due to the abundance and availability of concrete. However, concrete is a brittle material and, without proper reinforcement, cannot meet the requirements for structural purposes. Engineered Cementitious Composites (ECC), known for high ductility, and strain-hardening with low fiber contents, can potentially eliminate the need for steel reinforcement in 3D printing without any need for manual placement of reinforcement. A set of systematic tests on ECC mix designs' fresh and hardened properties was conducted to achieve the desirable ECC for 3DCP applications. In the preliminary stage, the cement was replaced with various contents of fly ash, slag, and silica fume, in two replacement levels, 50%, and 75%. The compressive, flow table, and setting time tests were conducted to evaluate the v primary mix designs. In the fresh state, the flow table test was set in a constant range of 18-20 cm to ensure the flowability of mixes.

Keywords

3d print

Document Type

Thesis

Language

English

Degree Name

Civil Engineering

Level of Degree

Masters

Department Name

Civil Engineering

First Committee Member (Chair)

Maryam Hojati

Second Committee Member

Tang-Tat Ng

Third Committee Member

Kristina Yu

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