cracking

This review analyzes key factors contributing to damage in reinforced concrete (RC) structures, including reinforcement corrosion, chemical attacks, cyclic and long-term mechanical loads, and extreme temperature effects. The study highlights crack formation as a primary damage mechanism, leading to structural degradation. Advanced computational modeling techniques, such as finite element analysis, offer valuable insights into crack propagation and corrosion processes but require further refinement.

A range of bifunctional catalysts based on MFI zeolite with 1.5 wt. % of nickel was synthesized. The aim of this research was to compare the performance of Ni-HZSM-5 zeolites of different methods of nickel loading (ion exchange and impregnation) in n-hexane hydroisomerization. Samples were characterized by XRD, TEM, and low-temperature nitrogen adsorption/desorption. It is stated that using ion exchange, it is more difficult to control nickel content in the samples.

The article is devoted to the stress-strain behavior, cracking and bearing strength of plain and reinforced non-autoclaved foam concrete slab spunched through rigid stamp. Experimental researches were held on slabs freely supported along the contour. Authors made an effort to determine the level of loading that corresponded the start of cracking and it was set at the level of 0,6 Ncr . There was also evaluated the ultimate tensility of foam concrete.