Mineral admixtures for concrete

U ovom završnom radu obrađena je tema mineralnih dodataka betonu. Dodaci betonu su tvari koje predstavljaju moguća rješenja za poboljšanje svojstava svježeg i očvrsnulog betona. Naime, u današnje je vrijeme sve veći naglasak na očuvanje i brigu o okolišu. Sukladno tome mineralni dodaci mogu biti alternativno rješenje problematike otpadnih materijala u prirodi. Ovaj teorijski rad bavi se upotrebom mineralnih dodataka kao djelomične zamjene cementa u betonu. U radu su opisani mineralni dodaci koji su većinom nastali kao sporedni proizvodi u industrijskoj proizvodnji i to na primjerima silicijske prašine, letećeg pepela, metakaolina, granulirane zgure visoke peći, vapnenca te pepela drvne biomase. Prikazana su dosadašnja saznanja o njihovoj upotrebi i primjeni u svijetu, način na koji nastaju, njihova svojstva te utjecaj na svojstva betona.The topic of this final thesis is the effect of mineral admixtures on concrete properties. Concrete admixtures are substances primarily used to improve certain properties of fresh and hardened concrete. One of the main global priorities of today is environmental conservation and lowering our carbon footprint. To combat the problem of waste disposal of industrial byproducts, this thesis evaluates the impact of adding mineral admixtures as a substitute for a part of cement in concrete mixtures. This thesis examines the use of mineral admixtures that have mainly emerged as by-products in industrial production, such as silica fume, fly ash, metakaolin, ground granulated blast-furnace slag, limestone and wood biomass ash. To be able to determine the effects on concrete properties, the work had to cover the current knowledge about their usage and application, the way they are formed and most importantly, their properties and their influence on the properties of concrete