Cement is utilized extensively in the manufacturing of concrete, which makes it most common material used building construction. However, usage a great deal cement results CO2 emissions, leads to greenhouse effect. Numerous studies have developed use nano-SiO2 concrete materials lower content mixtures while improving mechanical properties. Additionally, number demonstrated that silica NPs trigg...

Biosilicification sets the standard for the localized in vitro precipitation of silica at low orthosilicate concentrations in aqueous environment under ambient conditions. Numerous parameters must be controlled for the development of new technologies in designing inventive nanosilica structures, which are able to challenge the biological templates. A long neglected requirement that came into fo...

In this study two series of self compacting concrete mixtures were prepared with 100% coarse recycled concrete aggregates and different percentages of 0%, 20%, 40%, 60%, 80% and 100% fine recycled concrete aggregates. In series I and II the water to binder ratios were 0.50 and 0.45, respectively. The cement content was kept 350 3 m kg for those mixtures that don't have any Nano-Silica. To impro...

an efficient and environmentally benign   method for the synthesis of aryl iodides have been developed by diazotization of aromatic amines with nano2 and nanosilica periodic acid (nano-spia) as a green catalyst via grinding followed by a sandmeyer iodination by ki under solvent-free conditions at room temperature. the ensuing aryl diazonium salts supported on nano-spia were sufficiently stable ...

Silica is considered one of the most prevalent components in Earth’s shell and synthesized for use technological applications. Nevertheless, new methods finding a better, cheaper, more ecologically friendly supply silica with less energy consumption are unavoidable. This study investigates whether nanopowders made from waste great amount (fly ash glass) can be utilized as fillers an epoxy glue ...

Construction in the field can often be encountered with various problems, one of which is damage to concrete structures or non-concrete that affect weakening a structure. Many developed countries have carried out polymer mortar development efforts. Until now, still ongoing reduce use cement and anticipate global warming. One them by utilizing as an adhesive substitute for so strong produced sho...