micro silica (ms) is an extremely fine, spherical powder that is used as an additive for improving concrete performance. it is obtained as a by product of silicon metal and ferrosilicon alloy production.  due to its pozzolanic nature, micro silica can be used to enhance the qualities of both  fresh  and  hardened  concrete. addition of micro silica into the concrete as a cement replacement, dec...

Concrete is a building material, which in many cases fulfills the requirements for high sustainability. Industrial by-products, e. g. fly ash or silica fume, are used for improving the fresh and hardened properties of concrete, blast furnace slag for cement production, but also concrete by itself can be used as aggregate to produce strong and durable concretes. In this contribution examples of ...

Abstract The production of Portland Cement (PC) has been shown to be responsible for 5-8% global CO2 emissions. This led class F fly ash based geopolymer concrete being developed as a substiture PC reduce these However, research that each unique characteristics and requires specific mix design ash. is can occupy significant amount time. Furthermore, before the adopted commercial application it ...

Micro silica (MS) is an extremely fine, spherical powder that is used as an additive for improving concrete performance. It is obtained as a by product of silicon metal and ferrosilicon alloy production.  Due to its pozzolanic nature, micro silica can be used to enhance the qualities of both  fresh  and  hardened  concrete. Addition of micro silica into the concrete as a cement rep...

one of the main factors of premature deterioration of concrete structures is the corrosion of reinforcements. chloride penetration of concrete is one of the main reasons of this phenomenon. therefore, to have durable structure, it is necessary to have concretes with low permeability.there are various methods to evaluate permeability of concrete. finding a relationship between them can be useful...

The main strategy to reduce the environmental impact of the concrete industry is to reuse the waste materials. This research has considered the combination of cement replacement by industrial by-products, and natural coarse aggregate substitution by recycled aggregate. The aim is to evaluate the behavior of concretes with a reduced impact on the environment by replacing a 50% of cement by indus...

This paper addresses the property requirements of repair materials for high durability performance for concrete structure repair. It is proposed that the high tensile strain capacity of High Performance Fiber Reinforced Cementitious Composites (HPFRCC) makes such materials particularly suitable for repair applications, provided that the fresh properties are also adaptable to those required in p...

Corrosion of steel reinforcement due to chloride attack remains a major reinforced concrete durability concern. The problem is prevalent for structures located within marine environments or frost-prone locations where chlorides containing de-icing salts are used. This paper state-of-the-art review into binding in Portland cement concrete, with consideration the differences induced by presence s...

The development and implementation of “green” technologies in the construction sector, which ensure natural resource conservation, reduce harmful emissions provide utilization industrial waste, are key issues material engineering XXI century. Extensive research has been devoted to solving these issues, including field concrete science. Still, issue developing compositions with increased corrosi...