Vpliv različnih mlevnih dodatkov na lastnosti cementa CEM V/A(S-V-P) 42,5N LH

Abstract

Keywords

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[U. Pajk]
UDC:	691.54(043.2)
COBISS:	4816225
Views:	2518
Downloads:	594
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	ǂThe ǂinfluence of different grunding aids on the characteristics of cement CEM V/A (S-V-P) 42,5N LH
Secondary abstract:	The graduation thesis is composed of two parts. In the first part a short description of cement manufacturing through history is presented. Technological process of cement manufacturing in the cement plant Lafarge Cement cementarna Trbovlje is shown, starting with separate extraction of limestone and marl in the Plesko quarry. This is followed by grinding of raw materials, burning of clinker, cement grinding and its distribution. Burning process is summed up and divided into individual processes of dehydration, decarbonization, precalcination, calcination, sintering and cooling. In addition to basic components pozzolanic additives, fly ash, calcined slate and water are also discussed here. Individual phases of the hydration process, which is a complex chemical and physical process of binding water and cement, are explained, in addition to the process of forming of clinker minerals and theivs influence on setting and hardening rate of cement paste. All cement types produced by the cement plant Lafarge Cement Trbovlje are also presented. The emphasis of this thesis is on the use of grinding aids – additives, which can improve the quality of cement and consequently its use. Grinding aids are divided into two groups, Process grinding aids (PGA), used for improving grinding efficiency, and Enhancing grinding aids (EGA), used for enhancing cement performance in addition to improving grinding efficiency. In the second part of the thesis, experimental work is presented. As the basis CEM V/A (S-V- L) 42,5 N LH type of cement or étalon, was used. A comparison of 13 grinding aids of different manufacturers was conducted. The following characteristics were tested: “ specific surface and fineness of cement, workability of cement paste, standard consistency, initial and final setting time, soundness of cement paste, early and late (after 28 days) flexuval and bending strength”. According to the results of the test, three of the best grinding aids were selected on the basis of effect versus price ratio.
Secondary keywords:	graduation thesis;cement;hydration;grinding aids;standard tests;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. Ljubljana, Fakulteta za gradbeništvo in geodezijo
Pages:	XI, 68 str.
Type (ePrints):	thesis
Title (ePrints):	Vpliv različnih mlevnih dodatkov na lastnosti cementa CEM V/A(S-V-P) 42,5N LH
Keywords (ePrints):	gradbeništvo;diplomska dela;VSŠ;cement;hidratacija;mlevni dodatki;standardni poskusi;
Keywords (ePrints, secondary language):	graduation thesis;cement;hydration;grinding aids;standard tests;
Keywords (ePrints, secondary language):	graduation thesis;cement;hydration;grinding aids;standard tests;
ID:	8310653