Date of Award

1997

Publication Type

Doctoral Thesis

Degree Name

Ph.D.

Department

Mechanical, Automotive, and Materials Engineering

Keywords

Engineering, Materials Science.

Supervisor

Watt, D.,

Rights

info:eu-repo/semantics/openAccess

Abstract

PSMC is a waste material produced from pyrolysis of Sheet Molding Compound. The material consists of 35% fibreglass, 55% CaCO$\sb3$ and 10% carbon. In this thesis, PSMC and seven other related materials have been investigated for their influences on the overall properties of cement mortar. The materials under investigation in addition to PSMC are the fibreglass part of PSMC (PG), the filler part of PSMC (C+Ca), the ground virgin fibreglass (RG), the virgin CaCO$\sb3$ powder, the pyrolysed automotive fluff (PAF). For comparison, one class-F fly ash (FA), and one condensed silica fume (CSF) were also tested. The mortar properties that were studied include workability, strength, drying shrinkage, alkali-silica reactivity, sulphate resistance, freezing-thawing expansion, salt scaling resistance, and wet-dry expansion. The pore structures were also studied using water absorption and water evaporation techniques. It was found that PSMC increased the compressive strength, mitigated the ASR expansion and improved the sulphate resistance of cement mortar. All these improvements were largely due to the fibreglass content in the PSMC. Ground fibreglass was found to be a very effective material to improve the properties of cement mortar. It increased the compressive strength, reduced long term drying shrinkage, mitigated the ASR expansion, improved sulphate resistance, decreased the freeze-thaw weight loss and greatly enhanced the salt scaling resistance of cement mortar. The influence of fly ash and condensed silica fume on the properties of cement mortar was found to be similar to that of ground fibreglass. It was also found that the pore structure of cement mortars was greatly influenced by the mineral admixtures which possess pozzolanic properties. From a statistical analysis, it was concluded that the influence of mineral admixtures on the properties of cement mortar can be explained by their influence on three pore related factors. These factors are the porosity factor, the fine pore factor, and the permeability factor.Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1996 .X8. Source: Dissertation Abstracts International, Volume: 59-08, Section: B, page: 4400. Adviser: D. Watt. Thesis (Ph.D.)--University of Windsor (Canada), 1997.

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