Although properly made concrete is inherently a durable material, there are many physical and chemical forces in the environment which can contribute to its deterioration. This paper deals with two aspects of concrete durability in chemical aggressive environment: degradation effect of particular aggressive exposure and role of particular mineral additives. Results of the study of leaching and ...

Microsilica concrete was prepared with a water-binder ratio of 0.35. Microsilica was used as a 10% replacement of cement by weight. Cylinder and cube specimens were cast for testing different hardened properties of the concrete. Three curing methods such as water curing, wrapped curing, and dry-air curing were applied at 20±2 C to cure the cylinder and cube specimens until the 0 day of testing....

−Microsilica, one kind of industrial solid waste material, was utilized firstly to prepare a carbon-microsilica composite adsorbent (CMS). The prepared adsorbent was characterized with XPS, SEM and Gas sorption experiments. The results indicated the SO 3 H groups, which are very effective in capturing cationic organic dye, were introduced onto the surface of CMS; the Brunauer-Emmett-Teller (BET...

Abstract In the present study aims to produce high-strength fiber concrete containing microsilica and metakaolin. Eight mixing samples have been defined. The include control with ordinary Portland cement, replacing 10 percent of weight cement microsilica. amount was kept constant in next six designs. Three addition Forta fibers at rate 0.2, 0.5, 0.8 percent. Finally three 0.5% 8, 12% metakaolin...

The object of study in this work is microsilica. Microsilica a pulverized technogenic waste generated during the smelting technical silicon industries. intended use material to obtain highest quality grades end result without expensive quartz. finely dispersed powder, direct processing (without preliminary preparation) which into impossible ore-thermal furnaces. That requires manufacture high-s...

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...

The new Concrete Society Publication, Cementitious Materials, CSTR74, covers the effects of cementitious materials blast furnace slag (GGBS), fly ash (FA), limestone fines and silica fume (microsilica) on the properties of concrete. This paper focuses on the effects of silica fume on all the main properties of concrete in the fresh and hardened state as defined in the publication.

In this study, first, different mix design of four types of Self-Compacting Concrete (SCC), 1. SCC consisted of only nanosilica, 2. SCC included only microsilica, 3. SCC consisted of both microsilica and nanosilica and 4. SCC without microsilica and nanosilica called as control mix, were casted and tested to find out the values of the Slump Flow, L-Box and 7 and 28 days compressive strength. Th...

Al/MgAl2O4in situ metal matrix composites have been synthesized using value-added silica sources (microsilica and rice husk ash) containing ∼97% SiO2 in Al-5 wt.% Mg alloy. The thermodynamics and kinetics of MgAl2O4 formation are discussed in detail. The MgO and MgAl2O4 phases were found to dominate in microsilica (MS) and rice husk ash (RHA) value-added composites, respectively, during the ini...