The high cost and scarcity of noble metal catalysts, such as Pt, have hindered the hydrogen production from electrochemical water splitting, the oxygen reduction in fuel cells and batteries. Herein, we developed a simple template-free approach to three-dimensional porous carbon networks codoped with nitrogen and phosphorus by pyrolysis of a supermolecular aggregate of self-assembled melamine, p...

Abstract—Air-cooled Blast Furnace Slag Aggregate (BFSA) is usually referred to as a material providing for unique properties of concrete. On the other hand, negative influences are also presented in many aspects. The freeze-thaw resistance of concrete is dependent on many factors, including regional specifics and when a concrete mix is specified it is still difficult to tell its exact freeze-th...

Concrete, which is frequently used in the production process of buildings; It made by mixing cement, water, aggregate and additives appropriate amounts. important that physical, chemical, mineralogical especially mechanical properties concrete are at desired level terms strength durability built structures. In this direction, selection aggregates, an part mix, one factors affecting properties. ...

Plastics have become an essential part of our daily lives, and global plastic production has increased dramatically in the past 50 years. This significantly amount garbage produced. Researchers recently been interested using trash recyclable plastics concrete as ecologically acceptable building material. A large number publications published that describe behavior concrete, containing waste rec...

Neural networks have recently been broadly used in civil engineering applications due to their versatile capability as a simulator for the complex behavior of many problems (Adeli 2001). Compressive strength of cement mortar is mainly affected by water/cement ratio and aggregate/cement ratio. Recently, high performance concrete has been actively studied, however it is more difficult to predict ...

In recent times, the quantity of wastes generated from industries, hospitals, construction sites etc. is perpetually increasing year to year. Producing concrete utilizing waste or discarded materials as a partial replacement fine coarse aggregates one among effective ways utilization. The disposal incinerator bottom ash usually produced by incineration inorganic constituents municipal solid (MS...

Cement-treated bases are soils, gravels or manufactured aggregates mixed with certain quantities of cement and water in order to improve the characteristics a base sub-base layer. Due exploitation natural aggregates, it is matter importance avoid shortage resources, which why use recycled practical solution. In this paper we studied feasibility untreated electric arc furnace slags foundry sand ...

• The influence of ASR on aggregate interlock was investigated with push-off tests. not found to reduce affected concrete. Aggregate concrete relies the stresses at a crack and its width. Vecchio Collins’ model can predict Alkali-silica reaction (ASR) is one most damaging mechanisms affecting structures worldwide. effects durability serviceability damaged are widely known fairly well understood...

Waste tyre-rubber disposal is a serious global problem, posing severe danger to the environment. This present study aims investigate performance of concrete utilizing recycled waste as partial replacement for natural fine aggregate. Three different sizes crumb rubber were combined produce well-graded sample. Based on various trials, mixed proportions M30 grade and percentages determined. The te...

The article presents studies’ results of cementless lightweight concretes based on porous granular aggregate. Lightweight concrete components are specially synthesized from mixtures containing liquid sodium glass and thermal energy waste with various fineness. Thermal hardening a matrix technogenic fillers at temperature 350ºС provided heat-insulating 480 kg/m 3 density compressive strength 4.7...