Abstract
Non-destructive testing (NDT) and semi-destructive testing (SDT) have recently been more frequently used for the evaluation and condition assessment of concrete floors in various types of buildings. The subject of the article is to briefly introduce the reader to the problem of adhesion between overlays and substrates in concrete floors and to illustrate the current state of knowledge on the subject. The aim of this paper was to briefly describe the recently used non-destructive and semi-destructive testing methods and the parameters useful for characterizing the adhesion between overlays and substrates in concrete floors, as well as the methods useful to characterize the functional properties of the overlays. A recent literature survey, related to the adhesion between the overlays and substrates in concrete floors, is thus shown. Special emphasis was placed on the critical review of the current research results. Based on the analysis of the literature review, research gaps have been presented in order to highlight future research directions.
Highlights
Non-destructive testing (NDT) and semi-destructive testing (SDT) have recently been more frequently used for the evaluation and condition assessment of concrete floors in various types of buildings [1]
Concrete floors are commonly used in civil engineering [2,3,4], and they are made of overlays that are placed on the substrate [5]
IZ—interphase zone, near-surface zone of the concrete substrate (NSZ-CS)—the near surface of pores Φ (a) and number of pores (b): IZ—interphase zone, NSZ-CS—the near surface zone of the presented in the concrete substrate, near-surface zone of theOther overlay mortar (NSZ-OM)—the near surface zone of the mortar overlay
Summary
Non-destructive testing (NDT) and semi-destructive testing (SDT) have recently been more frequently used for the evaluation and condition assessment of concrete floors in various types of buildings [1]. Concrete floors are commonly used in civil engineering [2,3,4], and they are made of overlays that are placed on the substrate [5]. The most important properties of overlays are associated with their proper adhesion to the substrate, as well as their corresponding functional properties, such as abrasion resistance, subsurface tensile strength or hardness [6]. A floor is a horizontal interior element in a building, normally consisting of an overlay (flooring) applied on the substrate. The substrate is placed on the base. The load, which impacts on the overlay, is transferred to the base. The substrate is the structural support of the floor and transfers the load to the ground directly or indirectly through other elements of the building (e.g., a slab floor and walls) [7]
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