Influence of hydrothermal synthesis conditions and carbonation on physical properties of xonotlite-based lightweight material

• Using cement as a starting material to produce xonotlite-based lightweight (Xo_ALC). Effective hydrothermal synthesis condition for xonotlite formation is at 230 °C the autoclaving time of more than 18 h. Pore size distribution autoclaved specimen shifts coarser region due crystallization and carbonation. Compressive strength Xo_ALC slightly increased after The carbonation occurs quickly aerated concrete. This paper investigates effect conditions on change material’s (Xo_AAC) physical properties under Experiments included: quantitative X-ray diffraction, scanning electron microscopy, thermogravimetric differential thermal analysis, drying shrinkage, compressive strength, mercury intrusion porosimetry, thermomechanical solid-state nuclear magnetic resonance, water vapor absorption isothermal, nanoindentation test. pure crystalline was formed h short heating (2 h). shrinkage dimensional rate Xo_AAC were smaller that concrete (AAC). occurred AAC containing silicone oil. However, amount almost same both in later period.