Ultrasonic evaluation of self-healing cementitious materials with superabsorbent polymers: Mortar vs. concrete

Effects of styrene–acrylic emulsion on bond performance and interface microstructure of repair mortar of ternary cementitious system

“…The elastic modulus of the PAG repair mortar decreased with increasing SAE content, and this decrease benefited the dispersion and conduction of stress, 34 reduced the failure stress, and enhanced the bond strength. The PAG repair mortar and matrix had similar elastic moduli at an SAE content of 10 wt% 35 . The repair mortar had good compatibility with volume deformation.…”

“…The PAG repair mortar and matrix had similar elastic moduli at an SAE content of 10 wt%. 35 The repair mortar had good compatibility with volume deformation. The repair mortar and matrix together resisted deformation, and their bond performance did not deteriorate despite the shear stress at the interface.…”

Experimental Study of a Superabsorbent Polymer Hydrogel in an Alkali Environment and Its Effects on the Mechanical and Shrinkage Properties of Cement Mortars

“…Self-healing materials are distinguished by an autonomously initiated repair process upon crack formation and offer a solution in the event of limited access. Cementitious materials can seal and repair cracks by autogenous healing, primarily produced by the continuing hydration of unhydrated cement particles and the precipitation of CaCO 3 [ 5 , 6 ]. While these mechanisms happen concurrently, the further hydration of cement particles occurs only when all unhydrated cement has been consumed.…”

“…The cross-linking of an SAP is, therefore, of great importance because it prevents a hydrophilic polymer from dissolving in water, and it provides an SAP network structure that retains most of its absorbed water even after pressing, and the cross-linking also gives the hydrogel mechanical stability. Several studies have been carried out to investigate internal curing and autogenous shrinkage reduction in relation to SAPs in cementitious composites [ 5 , 11 , 12 , 13 ]. Polymer materials have exhibited several engineering applications [ 14 , 15 , 16 ].…”

Non-destructive evaluation of the effects of exposure environment in mortars using non-linear ultrasonic measurements

“…), or material development properties. The most important wave-based methods for evaluating damages in structures made with concrete are: acoustic emission (AE) (Ospitia et al, 2023), impact echo (IE) (Fülöp et al, 2022), ultrasonic pulse velocity (UPV) (Revilla-Cuesta et al, 2022), surface-wave techniques (Lefever et al, 2022(Lefever et al, , 2023Ahn et al, 2018Ahn et al, , 2022aIn et al, 2015) and diffuse-wave techniques (Quiviger et al, 2012;Payan et al, 2013;In et al, 2017;Zhang et al, 2018;Ahn et al, 2022b) for monitoring and evaluation of healing, cracks or discontinuities in concrete.…”