Corrosion of steel is one of the most important potential dangers and threats in concrete structures. Corrosion of steel embedded in reinforced concrete plays a key role in reducing the strength and durability of reinforced concrete. Several studies have proposed that alternative approaches to enhancing the performance of reinforced concrete and its resistance to corrosion. In this study, the r...

In this study, the concrete-steel bond strength of concrete filled cylindrical steel tubes has been experimentally investigated. 22 short, high strength and normal concrete filled circular steel tubes were tested. Push-out test was carried out as the common method to evaluate the bond carrying capacity. Four different concrete mixes were used in preparing the specimens. The steel tubes were w...

environmental pollution by various pollutants is one of the most important problems of this century. at least 20 elements, including chromium have been classified in toxic metals group, that half of them are released in the environment in excessive amounts of standards. chromium is a toxic pollutant that is widely spread in the environment and exists in cement and concrete. the aim of this stud...

On the example of Yaroslavl plant, established in 1786, author considers Industrialization and fast development mechanical engineering. The plant changed its profile from lead-whitening paint-and-lacquer production to machine It produced first vacuum cleaners USSR building vibrators for concrete compaction. study history during years five-year plans made it possible analyze process, difficultie...

Natural plant fibers represent a sustainable alternative to conventional fiber reinforcement materials in cementitious due their suitable mechanical properties, cost-effective availability and principle carbon neutrality. Due its high tensile strength stiffness as well worldwide distribution along with rapid growth, bamboo offers itself particular source. In experimental studies on concrete bea...

This study focuses on the shape optimization of concrete gravity dams considering dam–water–foundation interaction and nonlinear effects subject to earthquake. The concrete gravity dam is considered as a two–dimensional structure involving the geometry and material nonlinearity effects. For the description of the nonlinear behavior of concrete material under earthquake loads, the Drucker–Prager...

The effects of adding Nano-Silica particles on the compressive strength and water permeability of concrete and its comparison with that of Micro-Silica were investigated in this work. The effect of combination of Nano- silica and Micro-silica were also studied in this work, which resulted in an increase in compressive strength of concrete in comparison with other concrete specimens tested in th...

Nano materials have been widely used in laboratory and industrial scales in order to improve various properties of concrete and concrete mixture. The mainstream practice of the researches in this field is to add metallic nano-particles into the concrete mixture. The present research focuses on adding Micro-Nano Air Bubbles (MNAB) into water before mixing it with aggregate and cement mixtures. I...

The early age shrinkage is responsible for the early age cracking of concrete. It is very critical for durability of concrete. The change in volume of concrete due to evaporation of water or dehydration process is known as shrinkage. To reduce the early age shrinkage utilized the supplementary cementitious material (SCM) in concrete. In present research industrial and agricultural waste byprodu...