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Introduction

  • Łukasz SadowskiEmail author
Chapter
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Part of the Advanced Structured Materials book series (STRUCTMAT, volume 101)

Abstract

The results of experimental research and analysis of the level of adhesion in layered systems made of cement composites in a multi-scale approach are the subject of the book. In order to compare the results of multithreaded measurements, including those obtained at different scales, the research covered model layered systems, that included an overlay with a thickness of 25–60 mm, made in all cases of cement mortar with a maximum grain size of quartz aggregate equal to 2 mm, and also a substrate made of concrete with a maximum grain size of basalt crushed aggregate equal to 8 mm. The experimental work has been carried out in four stages, in which the measurement has been performed at various scales (macro, meso, micro and nano). The research program in subsequent stages has been elaborated on using the author’s experience that has been gained while implementing the earlier stages.

The results of experimental research and analysis of the level of adhesion in layered systems made of cement composites in a multi-scale approach are the subject of the book. In order to compare the results of multithreaded measurements, including those obtained at different scales, the research covered model layered systems, that included an overlay with a thickness of 25–60 mm, made in all cases of cement mortar with a maximum grain size of quartz aggregate equal to 2 mm, and also a substrate made of concrete with a maximum grain size of basalt crushed aggregate equal to 8 mm. The experimental work has been carried out in four stages, in which the measurement has been performed at various scales (macro, meso, micro and nano). The research program in subsequent stages has been elaborated on using the author’s experience that has been gained while implementing the earlier stages.

The goal of the book is to identify, based on experimental and numerical analyzes, the level of adhesion in layered systems made of cement composites in a multi-scale approach. In particular, the purpose of the research has been primarily:
  • to search for the suitability of artificial intelligence tools and learning algorithms for the reliable assessment of the level of adhesion of layered systems made of cement composites based on non-destructive tests,

  • to develop the methodology of a reliable non-destructive evaluation of the level of adhesion in newly constructed layered systems of any overlay thickness, as well as in existing layered systems made of cement composites,

  • to determine, whether spatial, hybrid and volume parameters describing the morphology of the concrete substrate surface in the meso scale may be useful to assess the level of adhesion of the layered systems,

  • to gain the answer to the question of whether the effective surface area of the concrete substrate and the contribution of the exposed aggregate on this substrate, determined in the meso scale, have an impact on the level of adhesion of layered systems made of cement composites,

  • to assess the structure of the air pores in the micro scale, the chemical composition and micromechanical properties of the cement composite on the nano scale in the interphase zone, together with the determination of their impact on the level of adhesion of layered systems made of cement composites,

  • to develop an effective methodology for the evaluation of the level of adhesion of layered systems made of cement composites in a multi-scale approach, including the indication of research methods and descriptors useful for this purpose.

After the introduction Chap.  2 briefly presents the background of the book with a special emphasis on the principles of the adhesion in layered systems made of cement composites, and also the proposal of principal scales of observation. Chapter  3 presents selected principal factors that influence the level of adhesion in layered systems made of cement composites. Chapter  4 reviews the methods used for the evaluation of the layered systems made of cement composites.

Chapter  5 focuses on the analysis of the search for the possibility of using artificial intelligence tools and learning algorithms that are useful in assessing the level of adhesion of layered systems made of cement composites based on non-destructive testing. Then, in one part of this chapter, the possibility of assessing the level of adhesion of layered systems made of cement composites in newly constructed layered systems of every overlay thickness, and also in existing layered systems with a constant overlay thickness is demonstrated. This is also carried out using non-destructive tests and artificial intelligence.

Chapter  6 will be related to research carried out on the meso scale. Therefore, this chapter concerns the specification of the fundamentals of the surface morphology metrology of the concrete substrate surface. Part of this chapter will contain the results of research aimed at demonstrating that spatial, hybrid and volume parameters that describe the morphology of the surface of the substrate can be useful for assessing the level of adhesion of layered systems made of cement composites. In turn, the next part will concern the assessment of the impact of the effective surface area of the concrete substrate and the contribution of the exposed aggregate on this substrate on the level of the adhesion.

Chapter  7 focuses on the assessment of the structure of the the air pores of the cement composite within the interphase zone in the micro scale, together with the determination of their impact on the level of adhesion of layered systems made of cement composites. In turn, Chap.  8 will be devoted to nano-scale research on the assessment of the impact of the chemical composition and micromechanical properties of the cement composite within the interphase zone to the level of adhesion.

Chapter  9 summarizes the book and contains the developed effective methodology for the evaluation of the level of adhesion of layered systems made of cement composites in a multi-scale approach, with the indication of research methods useful for this purpose and the descriptors evaluated by these methods. Finally, Chap.  10 presents the conclusions and perspectives.

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Faculty of Civil EngineeringWrocław University of Science and TechnologyWrocławPoland

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