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dc.contributor.advisorTamimi, Adil
dc.contributor.authorAlqamish, Habib Hassan Abdulla
dc.date.accessioned2017-06-04T06:40:47Z
dc.date.available2017-06-04T06:40:47Z
dc.date.issued2017-05
dc.identifier.other35.232-2017.12
dc.identifier.urihttp://hdl.handle.net/11073/8859
dc.descriptionA Master of Science thesis in Civil Engineering by Habib Hassan Abdulla Alqamish entitled, "Development and Evaluation of Nano-silica Sustainable Concrete," submitted in May 2017. Thesis advisor is Dr. Adil Tamimi. Soft and hard copy available.en_US
dc.description.abstractThe concrete industry is one of the main contributors in the emission of carbon dioxide. Yet, it is the most used man-made material. In the past few decades, different pozzolanic materials were used as a partial replacement of Portland cement. These materials played a major role in reducing the carbon footprint associated with the production of Portland concrete. Furthermore, they greatly improved the concrete's strength and durability. However, these materials are also responsible of causing significant shortcomings to the concrete such as the slow rate of strength development. In the last decade, the nanomaterials made a major breakthrough in the concrete industry in terms of reinforcing the concrete with unique properties. In this study, 1% and 2% dosages of nano-silica were added to concrete mixtures that contain 30% and 70% ground granulated blast-furnace slag (GGBS) dosages. Adding 1% of nano-silica to the 30% GGBS concrete mixture showed an increase in the compressive strength by 13.5%, 7.8%, 8.1%, and 2.2% at 1-day, 3-day, 7-day, and 28-day, respectively. The 2% of nano-silica increased the 30% GGBS concrete mixture's compressive strength less effectively by 4.3%, 7.6%, and 4.9% at 3-day, 7-day, and 28-day, respectively, when compared to the 1% dosage. On the other hand, adding 1% and 2% of nano-silica reduced the 70% GGBS concrete mixtures' compressive strength. Moreover, nano-silica reduced the deformability of the mixtures significantly which caused the increase in the Young's modulus. The flexural strength of the 30% GGBS concrete mixtures had similar behavior as the 28-day compressive strength. On the other hand, the flexural strength of the 70% GGBS concrete mixtures increased as the nano-silica's dosage increased. Nano-silica addition improved the microstructure and the interface structure of the mixtures due to its high pozzolanic activity and the nano-filler effect which is confirmed by the rapid chloride permeability test's (RCPT) results, and the scanning electron microscopy (SEM) images. Life-365 service life modeling showed that the 1% and 2% dosages of nano-silica extended the service life of the 30% GGBS concrete mixtures by 2.5 and 4.9 years and the 70% GGBS concrete mixtures by 11.2 and 24.7 years, respectively.en_US
dc.description.sponsorshipCollege of Engineeringen_US
dc.description.sponsorshipDepartment of Civil Engineeringen_US
dc.language.isoen_USen_US
dc.relation.ispartofseriesMaster of Science in Civil Engineering (MSCE)en_US
dc.subjectSustainable concreteen_US
dc.subjectNano-silicaen_US
dc.subjectDurabilityen_US
dc.subjectSEMen_US
dc.subjectscanning electron microscopy (SEM)en_US
dc.subjectEmbodied energyen_US
dc.subjectService lifeen_US
dc.subject.lcshConcreteen_US
dc.subject.lcshEnvironmental aspectsen_US
dc.subject.lcshNanostructured materialsen_US
dc.subject.lcshTestingen_US
dc.subject.lcshPozzuolanasen_US
dc.titleDevelopment and Evaluation of Nano-silica Sustainable Concreteen_US
dc.typeThesisen_US


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