Recycled aggregate produced from crushed waste concrete is suitable for use in structural concrete. It reduces the demand non-renewable resources and also energy general. However, RA more porous than most natural aggregates. The porosity of cover defines corrosion resistance reinforced concrete, it therefore disputed how recycled may affect durability This paper describes corrosion-related perf...

The handling of mistakes in the mathematics classroom is an area in which only little research is done so far. In mathematics education there are, in fact, several investigations about students’ mistakes from a diagnostic perspective, but hardly any studies on the question how teachers react in concrete mathematics lessons. In this article theoretical aspects and results of different video stud...

Prestressed concrete (PSC) is one of the most reliable, durable and widely used construction materials, which overcomes the weakness of concrete in tension by the introduction of a prestress force. Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime. However, the smart strand cannot give a representative ind...

To comply with recent international trends and initiatives, and in order to help achieve sustainable development, Korea has established a greenhouse gas (GHG) emission reduction target of 37% (851 million tons) of the business as usual (BAU) rate by 2030. Regarding environmentally-oriented standards such as the IGCC (International Green Construction Code), there are also rising demands for the ...

Reinforced concrete (RC) bridges exposed to marine environments significantly suffer from steel bar corrosion. Steel corrosion is responsible for strength deterioration of and material, damage in steel-concrete bond, spalling cover concrete, so on. This study presents a numerical model that can simulate the structural behavior corroded RC bridge piers under seismic action. In model, corrosion-i...

this paper presents theoretical and numerical state-of-the-art information in the field of hygro-thermo-mechanical deformation simulation in structural concrete. the aspects discussed include coupled hygro-thermo-mechanical performance of porous materials including concrete, multi-scale simulation of concrete properties especially the volumetric and structural deformation performance, and the m...