Laki betoni

undergraduate thesis

• Title (english): Lightweight concrete
• Author: Antonio Kuhta
• Mentor: Ivan Gabrijel (mentor)
• Committee member: Ivana Banjad Pečur (predsjednik povjerenstva)
• Committee member: Ivan Gabrijel (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

Laki betoni su vrsta specijalnih betona koji imaju manju gustoću od običnog betona. Smanjenje gustoće može se postići na više načina, stvaranjem pora u betonu, upotrebom agregata s velikom količinom pora ili stvaranjem međuprostora između zrna agregata. Ovim postupcima žrtvovat će se određena svojstva poput tlačne čvrstoće, da bi se neka druga svojstva, poput izolacijskih, znatno unaprijedila. Osnovna podjela lakih betona je na lakoagregatne, ćelijaste i betone od jednakozrnatog agregata. Kod lakoagregatnih betona koriste se razni agregati poput pucolana, plovućca i granula ekspandiranog polistirena. Svaka vrsta agregata daje krajnjoj betonskoj mješavini specifične prednosti i nedostatke. Ćelijaste betone karakteriziraju pore koje se postižu na razne načine. Mogu obuhvaćati veliki raspon gustoća pa je stoga i primjena široka. Svojstva lakih betona ovise konkretno o vrsti lakih betona međutim možemo reći da generalno imaju manju gustoću, manju nosivost i bolje izolacijske sposobnosti od običnih betona. Područje primjene je kod ove vrste betona izuzetno široko od izrade nosivih elemenata s poboljšanim izolacijskim karakteristikama pa sve do izrade posteljica i materijala za ispunu. Raznim istraživanjima i novim recepturama nastoje se usavršiti svojstva lakih betona i patentirati nove vrste koje će biti univerzalne.

Abstract (english)

Lightweight concretes are sort of special concretes with lower density than normal concrete. Reducing density can be achieved in many ways, by creating voids in concrete, by using aggregates with a lot of voids or by creating interspace between aggregate grains. These processes will sacrifice certain properties like compression strength to improve other properties like insulation. The basic classification of lightweight concrete is into lightweight aggregate concrete, cellular concrete and single-grain aggregate concrete. Pozzolan, pumice and EPS grains are used to make lightweight aggregate concrete. Each type of agrregate provides specific advantages and disadvantages for final mixture. Cellular concretes are recognized by voids which can be made several ways. They can cover wide range of density and wide range of application. Properties of lightweight concretes depend on type of lightweight concrete, but in general they have lower value of density, lower load capacity and better insulation properties than normal concretes. Application area of lightweight concretes is extremely wide, from creating load-bearing elements with good insulation properties to groundworks and filling materials. Various researches and new receptures seek to improve properties of lightweight concrete and patent new types that will be universal.

• Keywords: laki beton; lagani agregat; gustoća; nosivost; izolacijska svojstva
• Keywords (english): lightweight concrete; lightweight aggregate; density; load capacity; insulating properties
• Language: croatian
• URN:NBN: urn:nbn:hr:237:506128
• 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
• Created on: 2022-09-21 07:38:56