X-ray diffraction of concrete composites of high structural strength and density

Oleksandr Sumariuk,Ihor Fodchuk,Volodymyr Romankevych

doi:10.15330/pcss.22.4.746-749

Abstract

Аn analysis of the structure formation of concrete composites, compressive strength of which exceeds 120 MPa and a quantitative analysis of their qualitative composition and hydration products by X-ray diffraction, x-ray spectral analysis. The main factors affecting the physicomechanical parameters of the complex of various nanofillers and the formation of a denser cement stone structure, which mainly includes calcium hydrosilicates, calcium silicate hydroaluminates and hydroaluminates of various basicity, are studied.

Highlights

The introduction of a set of X-ray, correlationoptical, electron-raster methods for diagnosing the state of polycrystalline materials, as well as establishing the features of phase transformations at the microstructural level, is an urgent task today
There are a number of factors that can affect the physical and mechanical properties of such structures. These are microcracks caused by autogenous shrinkage [5], which significantly reduces their resistance to aggressive media and contributes to the formation of defects in the interphase transition zone between the cement matrix and large aggregate aggregates [6]
The use of cement with low C3S content significantly complicates the production of high-strength concretes, in particular with the use of microsilica and metakaolin, as the effectiveness of these additives implies the presence of excess Portlandite Ca(OH)2 in the hardening system, while systems with low C3S content are characterized by low content Ca(OH)2

Summary

Introduction

The introduction of a set of X-ray, correlationoptical, electron-raster methods for diagnosing the state of polycrystalline materials, as well as establishing the features of phase transformations at the microstructural level, is an urgent task today. There are a number of factors that can affect the physical and mechanical properties of such structures First of all, these are microcracks caused by autogenous shrinkage [5], which significantly reduces their resistance to aggressive media and contributes to the formation of defects in the interphase transition zone between the cement matrix and large aggregate aggregates [6]. The development of ways to reduce structural defects and limit the deformable properties of high-strength composites is becoming an important task for both research and engineering practice This is relevant for high-strength concrete composites, for which an important characteristic is the packing density of grains at the micro- and nanostructured level. This requires a detailed analysis and creation of models of physicochemical processes of microstructure development depending on changes in the phase composition of the cement composite

Methods

Results

Conclusion