نتایج جستجو برای: micro silica

تعداد نتایج: 151315  

Journal: :international journal of research in materials science 0
kaveh arzani department of materials engineering, science and research branch, islamic azad university, tehran, iran seyyed vahid ahmadi farmand department of materials engineering, science and research branch, islamic azad university, tehran, iran

abstract self compacting concrete (scc) is a new construction material in the world. the aim of this research is to construct self compacting concrete with high compressive strength using combination of nano silica and micro silica. for this purpose, nano silica, micro silica, portland cement type 2, superplasticizer (sp), and gravel and sand have been used. three different groups of samples wi...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2005
mohammad reza nilforoushan

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...

Abstract Self compacting concrete (SCC) is a new construction material in the world. The aim of this research is to construct self compacting concrete with high compressive strength using combination of nano silica and micro silica. For this purpose, nano silica, micro silica, Portland cement type 2, superplasticizer (SP), and gravel and sand have been used. Three different groups of samples wi...

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The term " pyroplasticity" refers to the deformation of the white ware that occurs during firing. In particular, this phenomenon is particularly important for tiles fired in roller kiln (especially thin and large dimensions) and the roughness created on the surface by vertical weight. In this study, 1, 3 and 5% of nanosilica and microsilica were replaced in porcelain tile batch. The effect of n...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
mojtaba shamsipur narmin bahrami adeh mohammad sadegh hajitarverdi mostafa yazdimamaghani fatemeh zarei

in this paper the influence of two different sizes of silica particles (micro-silica and nano-silica) was studied on mechanical properties of sulfur and sulfur composite. to improve the structural properties, sulfur was plasticized using dicyclopentadiene (dcpd) and methyl styrene (mst). plasticized sulfur composite was prepared by melt blending of plasticized sulfur and silica particles. the i...

Mohammad Reza Nilforoushan

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...

Journal: :international journal of nano dimension 0
j. esmaeili lecturer in faculty of civil engineering, university of tabriz.iran. k. andalibi lecturer in faculty of civil engineering, university of tabriz, iran.

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...

2002

Casting Silica at Room Temperature Silica cannot be used with traditional molding techniques because of its very high melting temperature. In addition, conventional grinding and polishing processes limit how small and complex the silica micro-optics can be. Geltech overcame these problems by developing methods to cast net-shape (no grinding necessary) silica-glass micro-optics at room temperatu...

J. Esmaeili, K. Andalibi

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...

2015
Jang-Ho Jay Kim Young-Jun You Youn-Ju Jeong Ji-Hun Choi Walter Remo Caseri

Many recent studies in the development of floating concrete structures focused on a connection system made of modules. In the connection system, the modules are designed to be attached by pre-stressing (PS) while floating on the water, which exposes them to loads on the surface of the water. Therefore, the development of a pre-connection material becomes critical to ensure successful bonding of...

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