Master's Thesis

Effect of alternative fillers use on the resistance of autoclaved aerated concrete in aggressive environments

Author of thesis: Ing. Ondřej Matoušek

Acad. year: 2025/2026

Supervisor: prof. Ing. Rostislav Drochytka, CSc., MBA, dr. h. c.

Reviewer: Ing. Radek Janovský

Abstract:

This master’s thesis focuses on the possibilities of using alternative raw materials in the production of autoclaved aerated concrete (AAC) and on their influence on the properties of the resulting material when replacing the filler—siliceous sand. It also examines their resistance to aggressive environments such as sulfate attack and carbonation. The theoretical part describes the current approach and development in the use of secondary and waste materials, the types of alternative raw materials used for AAC production, and the effects of aggressive environments on AAC. In the practical part, the optimal proportion of the alternative raw materials is verified, the alternatives are selected, and the properties of the fresh mix and the autoclaved material are described and evaluated. Finally, the thesis investigates the properties and percentage changes of autoclaved mixes containing alternative fillers when exposed to aggressive environments.

Keywords:

Autoclaved aerated concrete, secondary raw material, siliceous sand, filler, cement, aggressive environment, carbonation, sulfate attack, fibers, glass fibers, waste material, properties of autoclaved aerated concrete, circular economy

Date of defence

03.02.2026

Date of publish

02.02.2029

Result of the defence

Defended (thesis was successfully defended)

znamkaAznamka

Grading

A

Process of defence

Student představil komisi formou prezentace svoji diplomovou práci a reagoval na dotazy členů komise. Během obhajoby položili členové komise následující otázky: doc. Ing. Radomír Sokolář, Ph.D. - Nebyla by lepší jiná délka vláken aby nedocházelo ke shlukům? doc. Ing. Karel Dvořák, Ph.D. – Víte jak vypadá matematické optimum? doc. Ing. Nikol Žižková, Ph.D. - Upravoval jste nějak perlinku? Neřešil jste tu úpravu která na perlince je? Student velmi dobře reagoval na připomínky oponenta a snažil se zdůvodnit nevržená a použitá řešení. Rovněž na připomínky členů komise reagoval velmi dobře.

Language of thesis

Czech

Faculty

Fakulta stavební

Department

Institute of Technology of Building Materials and Components

Study programme

Civil Engineering – Building Materials and Technologies (NPC-SIM)

Composition of Committee

Ing. Karel Nosek, Ph.D. (předseda)
Ing. Martin Luňáček, Ph.D. (místopředseda)
prof. Ing. Rostislav Drochytka, CSc., MBA, dr. h. c. (člen)
prof. Ing. Rudolf Hela, CSc. (člen)
doc. Ing. Karel Dvořák, Ph.D. (člen)
doc. Ing. Radomír Sokolář, Ph.D. (člen)
doc. Ing. Lenka Bodnárová, Ph.D. (člen)
doc. Ing. Nikol Žižková, Ph.D. (člen)

Supervisor’s report
prof. Ing. Rostislav Drochytka, CSc., MBA, dr. h. c.

Grade proposed by supervisor: A

File inserted by supervisor Size
Hodnoceni_vedouciho_DP.pdf 81,64 kB

Reviewer’s report
Ing. Radek Janovský

Grade proposed by reviewer: A

File inserted by the reviewer Size
Posudek oponenta [.pdf] 85,91 kB

Reasons for publication postponement

Availability of the final thesis has been postponed in compliance with the provisions of Section 47b (4) of Act No. 111/1998 Coll., on the Higher Education Institutions and on amendments and supplements to other acts, as amended. The deferred work is part of an active reasearch project, the results of which will be published only after its completition.

Responsibility: Mgr. et Mgr. Hana Odstrčilová