doctoral thesis
Ahmad Rizwan Mumtaz (Author), Gregor Kravanja (Mentor), Andrej Ivanič (Co-mentor), Samo Lubej (Co-mentor)

Abstract

Ta študija raziskuje možnosti uporabe visoko zmogljivega betona (UHPC), ojačenega z bazaltom, z vključevanjem hkratnih samočistilnih in samosvetlečih funkcij, kar utira pot trajnostnemu napredku v gradbeništvu. Nove zelene formulacije UHPC so bile razvite z vključitvijo dodatnih cementnih materialov in optimizacijo razmerja med vodo in vezivom, čemur je sledila uporaba bazaltnih vlaken za povečanje trdnosti in nateznosti. Izdelani vzorci z visoko gostoto pakiranja delcev kažejo zadostno obdelovalnost in tlačno trdnost do 136 MPa ter, pri dodajanju bazaltnih vlaken, opazno zmanjšanje krhkosti. Notranja mikrostruktura bazaltnih vlaken je bila gladka, homogeno porazdeljena in dobro oprijeta na matriko UHPC. Da bi zagotovili želeni dolgotrajni videz dekorativnega UHPC in zmanjšali prihodnje stroške vzdrževanja, je bila uvedena časovno učinkovita strategija za ustvarjanje biomimetičnega dizajna površine, ki oddaja svetlobo. Vzorci kažejo visoko hrapavost površine, za katero so značilne mikro do nano praznine, ki kažejo superhidrofobnost s stičnimi koti, ki segajo do 155,45°. To spremlja kot kotaljanja, ki se zmanjša na 7,1°, kar izboljšuje njihove samočistilne lastnosti. Funkcija samosvetljenja je prikazala intenzivno začetno svetlobno emisijo in ponudila potencialno energetsko učinkovito nočno osvetlitev.

Keywords

UHPC;basalt fibers;mechanical properties;morphology;superhydrophobic;self-luminescence;doctoral dissertations;

Data

Language: English
Year of publishing:
Typology: 2.08 - Doctoral Dissertation
Organization: UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Publisher: [A. R. Mumtaz]
UDC: 666.972.5-12(043.3)
COBISS: 213063427 Link will open in a new window
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Downloads: 1
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Other data

Secondary language: Slovenian
Secondary title: Razvoj in karakterizacija novega visokozmogljivega betona s superhidrofobnimi in luminiscentnimi lastnostmi
Secondary abstract: This study explores the potential of using basalt reinforced UHPC by incorporating simultaneously self-cleaning and self-luminescent features, paving the way for sustainable advancements in civil engineering. New green formulations of UHPC were developed by integrating supplementary cementitious materials and optimizing water to the binder ratio, followed by using basalt fibers to enhance strength and ductility. The fabricated samples with high particle-packing density exhibit sufficient workability and compressive strength up to 136 MPa, and, when incorporating basalt fibers, a notable reduction in brittleness. The inner microstructure of basalt fibers was observed to be smooth, homogeneously distributed, and well adhered to the UHPC matrix. To ensure the desired long-lasting visual appearance of decorative UHPC and reduce future maintenance costs, a time-effective strategy for creating a light-emitting biomimetic surface design was introduced. The samples exhibit high surface roughness, characterized by micro to nano-scale voids, displaying superhydrophobicity with contact angles reaching up to 155,45°. This is accompanied by roll-off angles decreasing to 7,1°, highlighting their self-cleaning features. The self-luminescence feature schowcased intense initial light emission, offering a potential energy-efficient nigttime lighting solution.
Secondary keywords: UHPC;bazaltna vlakna;mehanske lastnosti;morfologija;superhidrofobnost;samosvetljenje luminiscence;doktorske disertacije;
Type (COBISS): Doctoral dissertation
Thesis comment: Univ. v Mariboru, Fak. za gradbeništvo, prometno inženirstvo in arhitekturo, Gradbeništvo
Pages: XVIII, 108 str.
ID: 23526255