Lastnosti betonov z žlindrinim cementom : diplomska naloga št.: 209/OG-MK

Krnc, Jaka (author), Bokan-Bosiljkov, Violeta (mentor)

V diplomski nalogi so obravnavane lastnosti betonskih mešanic, katerih vezivo predstavlja žlindrin cement CEM III/B 32,5 N-LH/SR, z nizko toploto hidratacije. Za pridobitev podatkov o lastnostih različnih mešanic so bile opravljene laboratorijske preiskave svežega in strjenega betona. Na svežih mešanicah so bile opravljene preiskave za določitev konsistence (metoda s posedom in metoda z razlezom), na strjenih vzorcih pa so bili določeni tlačna trdnost s porušno metodo in elastični parametri z uporabo ultrazvočne preiskave. Enake preiskave so bile opravljene tudi na betonih s Portlandskim cementom CEM II/B-M (LL-V) 42,5 N. Cementi CEM II/B so najpogosteje uporabljena vrsta cementa v slovenski gradbeniški praksi. Sledila je analiza rezultatov in njihova medsebojna primerjava. Rezultati so pokazali, da so betoni z žlindrinim cementom bolj tekoče konsistence, kot betoni s Portlandskim cementom. Zgodnje vrednosti mehanskih lastnosti, kot so tlačna trdnost ter dinamični modul elastičnosti in strižni modul, so občutno nižje pri betonih z žlindrinim cementom, zaradi počasnejšega oblikovanja produktov hidratacije. Po osemindvajsetih dneh hidratacije pa se razlika tlačnih trdnosti in elastičnih parametrov med betoni z žlindrinim cementom in betoni s Portlandskim cementom bistveno zmanjša. V nekaterih primerih betoni z žlindrinim cementom dosežejo celo višje 28-dnevne vrednosti mehanskih lastnosti.

• Language: Slovenian
• Keywords: gradbeništvo, diplomska naloga, VSŠ, GR, GR-OG, beton, žlindrin cement, preskus s posedom, preskus z razlezom, tlačna trdnost, ultrazvok, modul elastičnosti, strižni modul, Poissonov koeficient
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Krnc]
• Year: 2021
• Number of pages: XVI, 44 str.
• PID: 20.500.12556/RUL-131129
• UDC: 691.32(497.4)(043.2)
• COBISS.SI-ID: 84670211
• Publication date in RUL: 23.09.2021

KRNC, Jaka, 2021, Lastnosti betonov z žlindrinim cementom : diplomska naloga št.: 209/OG-MK [online]. Bachelor’s thesis. Ljubljana : J. Krnc. [Accessed 14 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=131129

Secondary language

• Language: English
• Title: Properties of slag cement concrete : graduation thesis no.: 209/OG-MK

Abstract

he graduation thesis deals with the properties of concrete mixtures prepared with slag cement CEM III / B 32.5 N-LH / SR with low heat of hydration. Laboratory tests of fresh and hardened concrete were performed to obtain data on the properties of different mixtures. Slump test and flow table test were performed to determine the consistency of fresh concrete. Compressive strength was determined on hardened samples and elastic parameters were measured using the ultrasonic technique. The same tests were performed on concretes with Portland cement CEM II / B-M (LL-V) 42.5 N. CEM II / B types of cement are the most commonly used cements in Slovenian construction practice. After completed laboratory tests, an analysis of the test results and their comparison followed. The obtained results showed that slag cement concretes have a more liquid consistency than Portland cement concretes. Due to the slower formation of hydration products, early age mechanical properties, such as compressive strength and dynamic modulus of elasticity and shear modulus, are significantly lower in the slag cement concretes. After twenty-eight days of binder hydration, the difference in compressive strength and elastic parameters between the slag cement concrete and Portland cement concrete decreases significantly. In some cases, slag cement concrete achieves even higher mechanical properties after twenty eight days.

• Keywords: graduation thesis, civil engineering, concrete, slag cement, slump test, flow table test, compressive strength, ultrasound, modulus of elasticity, shear modulus, Poisson's ratio