Analysis and countermeasures of stratified cracking for autoclaved aerated concrete wallboard
SUN Xilin
LI Meihong
XU Hongsheng
Abstract：The causes of wallboard layer cracking were analyzed,and countermeasures for controlling wallboard layer cracking were put forward.The use of glass beads and bubble optimization technology and the addition of nano-modifiers improved the ho-mogeneity and stability of the slurry,increased the degree of hydration,and improved the strength,thermal properties,shrinkage properties and water-repellent properties of autoclaved aerated concrete.FRP reinforcement was used instead of steel reinforcement to solve the problem of wallboard layer cracking,and it was found that FRP reinforcement had higher strength than steel reinforce-ment,its ultimate tensile strength is about 1.6 times of that steel bars with the same diameter,indicating better tensile bearing ca-pacity.It was found that FRP bars have higher strength and corrosion resistance than steel bars.When they are applied to wall panels instead of steel bars,the mid-span deflection of FRP reinforced wall panels is about 1.15 times that of reinforced wall pan-els,and the initial crack load and ultimate load of FRP reinforced wall panels are similar to those of reinforced wall panels,both around 0.97 times.The wall panels show better bending resistance,durability and safety,which can effectively solve the layer cracking problem of autoclaved aerated concrete wall panels.
Keywords：autoclaved aerated concrete wall panelscorrosion of reinforcementstratified crackingFRP bars
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 81-85,117 )