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Investigation of the strength development of autoclaved aerated concrete
Author(s) -
Peter Ulrike,
Nowak Pawel,
Oeinck Hermann,
Spicker Volker,
Pust Christopher
Publication year - 2018
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.874
Subject(s) - raw material , autoclaved aerated concrete , materials science , rheology , viscosity , cement , aeration , research development , composite material , environmental science , waste management , chemistry , geology , engineering , paleontology , test (biology) , organic chemistry
Although the chemical reactions occurring throughout the production process of autoclaved aerated concrete (AAC) are well‐known today, the physicochemical stability of the greencake during its expansion is not fully understood. The order in which reactions occur during the greencake setting, the reaction speed, their impact on the temperature, the viscosity, or the bubble formation remain unclear. The objective of this research is to better understand the contribution of different factors such as the quality of raw materials like quicklime, cement, or sulfate carrier on the expansion and strength development of the AAC greencake, with a focus on the temperature development. The impact of the raw materials is investigated on the hydration or slaking of the quicklime and on the greencake growth, while the strength development of the stabilizing mineral paste is studied using rheology. It is shown that the temperature profile in the greencake is governing the stability during the greencake growth, and is impacted by the amount and nature of the raw materials used. External temperature control and/or wise choice of raw materials may thus allow for a fundamental revision of mix compositions.