Optimised Hydration and Durability of Non-Autoclaved Aerated Concrete via Lignin-Based Ionic Additive
Bekkaliev N. Sabitov Y. Lukpanov R. Zhumagulova A. Jexembayeva A.
October 2025Multidisciplinary Digital Publishing Institute (MDPI)
Eng
2025#6Issue 10
This study addresses the issues of the reduced strength and increased brittleness of non-autoclaved aerated concrete by introducing an ionic modifying additive (MIA) derived from lignin-rich softwood sawdust. The additive is intended to reduce internal stresses during hydration and enhance the stability of the pore structure. Concrete samples containing 10%, 20%, and 30% additive are tested for compressive strength, wear resistance, water absorption, frost resistance, thermal conductivity, and mineral composition. Optimising the MIA content to 20% increases compressive strength by 19%, improves wear resistance by 15%, reduces water absorption by 22%, and achieves a frost resistance class of F50 versus F30 for the control sample. An X-ray diffraction analysis shows a reduction in the portlandite content from 52% to 31%, as well as increased calcite and hatrurite formation. These results confirm that the MIA optimises hydration, enhances microstructural homogeneity, and significantly extends the service life of non-autoclaved aerated concrete under cyclic freeze–thaw conditions.
aerated concrete , energy efficiency , hydration process , mechanical properties , modifying ionic additive
Text of the article Перейти на текст статьи
Department of Technology of Industrial and Civil Engineering, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
ENU-Lab Research and Production Center, L.N. Gumilyov Eurasian National University, 2, Satpayev Street, Astana, 010008, Kazakhstan
Department of Technology of Industrial and Civil Engineering
ENU-Lab Research and Production Center
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026