Różycka Agnieszka, Kotwica Łukasz
Department of Building Materials Technology, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, Poland.
Materials (Basel). 2022 Mar 31;15(7):2576. doi: 10.3390/ma15072576.
This paper aims to study the suitability of partial replacement of lime by waste originating from the cleaning of flue gases from the combustion of industrial wastes in the production of autoclaved aerated concrete (AAC). The compressive strength, bulk density, pore structure, phase composition, and microstructure of hydration products of the AAC were analyzed. According to the results, the addition of the waste can effectively enhance the mechanical properties of AAC due to the differences in morphology of hydration product-1.1 nm tobermorite and related dense microstructure. The pore size distribution was significantly influenced by waste addition, which was one of the main reasons for the increase in thermal conductivity. The XRD and SEM results showed that foreign ions introduced with the wastes affect the synthesis of 1.1 nm tobermorite. Moreover, it was shown that waste containing a high content of CaO can be used as lime replacement, which allows reducing CO emissions during the AAC production process.
本文旨在研究在蒸压加气混凝土（AAC）生产中，用工业废弃物燃烧烟气净化产生的废料部分替代石灰的适用性。分析了AAC的抗压强度、堆积密度、孔隙结构、相组成及水化产物的微观结构。结果表明，由于水化产物1.1nm雪硅钙石形态及相关致密微观结构的差异，添加该废料可有效提高AAC的力学性能。废料添加对孔径分布有显著影响，这是热导率增加的主要原因之一。XRD和SEM结果表明，废料引入的外来离子影响1.1nm雪硅钙石的合成。此外，结果表明，高CaO含量的废料可作为石灰替代品，这有助于在AAC生产过程中减少CO排放。
