Use of AFM technique to study the nano– silica effects in concrete mixture

Behtash Amiri

doi:10.17485/ijst/2012/v5i2.5

Abstract

Nano structural properties of concrete can be studied with considering the variations of the nano silica/Si ratio, the silicate structure, and the contents of Si-OH in the mixture using X- Powder method, AFM (Atomic Force Microscopy) and X- Ray Diffraction (XRD) techniques. We have thus synthesized the nano silica particles by employing sol- gel method. The obtained results are led to a new aspect of the silicate - hydrate, which helps to establish quantitative relations between the nano structure and bulk properties.

Highlights

The crystalline phase changes in the mechanical in the crystallite cement paste (Bahari et al, 2005; Girao properties of concrete have been the subject of extensive et al, 2010; Moudrakovski et al, 2010)
Synthesizing silica nano particles phases with using X- Ray Diffraction (XRD) technique and find their in cement matrix has received significant attention due to morphology and atom’s arrangement and distinguish the its practical implications
Some cements and concretes can be considered as complex new hypotheses proposed for describing possible multi-phase composite materials with using XRD and mechanisms for the temporal deformation of hardened AFM techniques

Summary

Introduction

The crystalline phase changes in the mechanical in the crystallite cement paste (Bahari et al, 2005; Girao properties of concrete have been the subject of extensive et al, 2010; Moudrakovski et al, 2010) It is research over the past century (Hatt, 1907; Alizadeh et necessary to understand the nature of C- S- H and their al., 2007). In cement Experimental procedure and details chemistry CaO, SiO2 and H2O are represented by calcium The sol-gel process is a wet-chemical technique and silicate hydrate, respectively. This cement that forms (chemical solution deposition) widely used recently in the up to about 60% by volume of the paste, is held together fields of materials science and ceramic engineering.

Findings

Discussion

Conclusion