Developing a novel mix design technology for ‘rammed Earth’ using pulp mill fly ash as cementitious material
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Ajabi Naeini, Amin
issued: 2021-01-20T18:07:28Z
issued: 2021
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Rammed earth (RE) is a traditional soil-based building material made by compressing a mixture of natural earth and binder ingredients in temporary frameworks. The modern RE uses 5 to 10% cement as a binder to meet the strength and durability requirements. Due to the CO₂ footprints associated with cement production, this research aimed to develop and assess innovative waste-to-product technologies and strategies for the transformation and effective utilization of pulp mill residues in the construction sector as a partial replacement for conventional Portland cement. For the experimental study, the as-received pulp mill fly ash (PFA) and a fly ash-based geopolymer synthesized by alkali-silicate activation method, were incorporated as cement substitutes in the RE mixtures. Initially, the local soil was collected and characterized by important index and engineering properties. The fly ash was procured from a local pulp mill, and its physico-chemical, mineralogical, and morphological characterization, as well as environmental impact, was identified. Further, the various mix designs of RE material incorporating local soil and different proportions of Portland cement, pulp mill fly ash, calcium bentonite, and alkali-silicate activator (a mixture of sodium silicate and sodium hydroxide solutions) were developed. The compacted RE specimens were cured and tested for 7-day and 28-day unconfined compressive strength (UCS) variations. The PFA and calcium bentonite-treated samples, as well as samples that were stabilized by the alkali-silicate activator, exhibited significant strength improvement. Further, the cured RE specimens were subjected to a standard freeze-thaw durability test to evaluate their frost resilience properties as a sustainable construction technique under extreme climatic conditions. The alkali-silicate activator-treated samples were highly unstable under extreme weathering conditions. On the other hand, the specimens treated with calcium bentonite and PFA ret…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/77163
note: i DEVELOPING A NOVEL MIX DESIGN TECHNOLOGY FOR ‘RAMMED EARTH’ USING PULP MILL FLY ASH AS CEMENTITIOUS MATERIAL by Amin Ajabi Naeini BSc, Isfahan University of Technology, 2011 MSc, Isfahan University of Technology, 2014 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) January 2021 © Amin Ajabi Naeini, 2021 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis/dissertation entitled: Developing a Novel Mix Design Technology for ‘Rammed Earth’ Using Pulp Mill Fly Ash as Cementitious Material submitted by Amin Ajabi Naeini in partial fulfillment of the requirements for the degree of Master of Applied Science in Civil Engineering. Examining Committee: Dr. Sumi Siddiqua, School of Engineering Supervisor Dr. Ramy Saadeldin, Adjunct Faculty, School of Engineering Supervisory Committee Member Dr. Nima Latifi, Industry Supervisory Committee Member Dr. Rudolf Seethaler, School of Engineering University Examiner iii Abstract Rammed earth (RE) is a traditional soil-based building material made by compressing a mixture of natural earth and binder ingredients in temporary frameworks. The modern RE uses 5 to 10% cement as a binder to meet the strength and durability requirements. Due to the CO2 footprints associated with cement production, this research aimed to develop and assess innovative waste-to-product technologies and strategies for the transformation and effective utilization of pulp mill residues in the construction sector as a partial replacement for conventional Portland cement. For the experimental study, the as-received pulp mill fly ash (PFA) and a fly ash-based geopolymer synthesized by alkali-silicate activation method, were incorporated as cement substitutes in the RE mixtures. Initially, the local soil was collected…
has type: Thesis/Dissertation
date issued: 2021-02
is shown at: 10.14288/1.0395680
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/77163