Deformacije betona

undergraduate thesis

• Title (english): Deformations of concrete
• Author: Anamarija Šuštić
• Mentor: Ivan Gabrijel (mentor)
• Committee member: Ivan Gabrijel (predsjednik povjerenstva)
• Committee member: Bojan Milovanović (član povjerenstva)
• Committee member: Marijan Skazlić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Materials); Zagreb
• Defense date and country: 2022-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract

Deformacije betona javljaju se uslijed djelovanja vanjskog opterećenja ili utjecaja iz okoliša, a dijele se na dvije osnovne skupine: volumenske deformacije betona i deformacije pod opterećenjem. Volumenske deformacije mogu nastati zbog promjene higrotermalnih uvjeta, a dijelimo ih na deformacije zbog promjene temperature i deformacije nastale skupljanjem i bubrenjem betona. Bubrenje se manifestira povećanjem dimenzija betonskih elemenata, no ono ne uzrokuje značajne deformacije. Detaljnije su opisane vrste skupljanja betona: kemijsko i autogeno skupljanje, plastično skupljanje, skupljanje od sušenja, toplinsko skupljanje
i skupljanje od karbonatizacije. Parametri koji utječu na veličinu skupljanja su sastav betona, okoliš i vlažnost te geometrijski oblik betonskih elemenata. Deformacije pod opterećenjem dijele se na deformacije pod kratkotrajnim i dugotrajnim opterećenjem. Ispitivanjem betonskih uzoraka pod utjecajem kratkotrajnog opterećenja dobijemo modul elastičnosti, Poissonov koeficijent i modul posmika. Pod djelovanjem dugotrajnog opterećenja javlja se puzanje čije se mjerenje provodi uređajima koji se nazivaju puzalice.

Abstract (english)

Deformations of concrete occur due to the action of external load of environmental infulences, they are divided into two basic groups: volume deformations of concrete and deformations under load. Volume deformations can occur due to changes of hygrotermal conditions and they are devided into deformations due to temperature changes and deformations caused by shrinkage and swelling of concrete. Swelling is manifested by an increase in dimentions of the concrete elements, but it does not cause significant deformations. The types of shrinkage of concrete are: chemical and autogenous shrinkage, plastic shrinkage, drying shrikage, thermal shrinkage and carbonation shrinkage. The parameters that affect the size of shrinkage are the composition of concrete, the environment and the humidity and the geometric shape of concrete elements. Deformations under loads are divided into deformations under short duration loads and long duration loads. By testing concrete samples under the influence of short duration load, we obtain the modulus os elasticity, Poisson`s ratio and shear modulus. Creep occures under the influence od long duration load, it is measured with a device called creep testing machine.

• Keywords: deformacija betona; skupljanje i bubrenje betona; modul elastičnosti; puzanje
• Keywords (english): concrete deformations; shrinkage and swelling of concrete; youngs modulus; creep
• Language: croatian
• URN:NBN: urn:nbn:hr:237:769804
• Study programme: Title: Civil Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Repository: Repository of the Faculty of Civil Engineering, University of Zagreb
• Created on: 2022-09-21 07:34:27