Vpliv kemijskih dodatkov na reološke lastnosti svežega betona

diplomska naloga

Bojan Kresal (Author), Violeta Bokan-Bosiljkov (Mentor), Matevž Dolenc (Thesis defence commission member), Maruška Šubic Kovač (Thesis defence commission member), Drago Saje (Thesis defence commission member), Andraž Hočevar (Co-mentor)

Abstract

V okviru diplome smo izvajali raziskave na svežem betonu. Glavni namen raziskav je bil preučiti vpliv kemijskih dodatkov na reološke lastnosti sveže betonske mešanice. Meritve reoloških parametrov smo izvajali z reometrom ConTec Viscometer 5. Vzporedno smo izvajali tudi preiskave poseda in razleza svežega betona ter pri uporabi aeranta določili še delež zraka v betonu. Vse mešanice so bile sestavljene iz agregata, vode in cementa ter kemijskega dodatka. Kot kemijski dodatek smo uporabili superplastifikator, aerant in stabilizator. Uporabili smo tudi dve različni vrsti cementa. Dobljene rezultate smo analizirali ter opravili primerjave med strižno napetostjo na meji tečenja in plastično viskoznostjo ter posedom in razlezom svežega betona, v različnih časih po zamešanju betona.

Keywords

gradbeništvo;diplomska naloga;VSŠ;sveža betonska mešanica;reologija;posed;razlez;plastična viskoznost;strižna napetost na meji tečenja;

Data

Language:	Slovenian
Year of publishing:	2016
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[B. Kresal]
UDC:	624.012.4:691.3(497.4)(043.2)
COBISS:	7531873
Views:	2213
Downloads:	562
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Influence of chemical admixtures on rheological properties of fresh concrete
Secondary abstract:	Within the thesis we carried out tests on fresh concrete mixtures. The main purpose of the tests was to examine the influence of chemical admixtures on rheological properties of fresh concrete. Measurement of rheological parameters was carried out with ConTec Viscometer 5 rheomether. In parallel, we also carried out slump test and flow table test on fresh mixtures and determined air content for mixtures with air-entraining agent. All concrete mixtures were composed of aggregate, water, cement and chemical admixture. As admixture, superplasticizer, air-entraining agent and stabilizer were used. We also used two different types of cement. The obtained results were analysed and comparison between shear yield stress and plastic viscosity, as well as slump and flow value were made in different times after mixing of fresh concrete.
Secondary keywords:	graduation thesis;fresh concrete mixture;rheology;slump;flow;plastic viscosity;shear yield stress;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XII, 59 str.
ID:	9159100