A5062242382- Microbial Applications in Construction Materials
- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Grouting, Rheology, and Soil Mechanics
- Concrete Corrosion and Durability
- Innovations in Concrete and Construction Materials
- Building materials and conservation
- Rock Mechanics and Modeling
- Geotechnical Engineering and Underground Structures
- BIM and Construction Integration
- Ultrasonics and Acoustic Wave Propagation
- Geophysical Methods and Applications
- Concrete Properties and Behavior
- Drilling and Well Engineering
- Infrastructure Maintenance and Monitoring
- Smart Materials for Construction
- Polymer composites and self-healing
- Structural Health Monitoring Techniques
- Recycled Aggregate Concrete Performance
- Sustainable Building Design and Assessment
Polytechnic University of Turin
2018-2025
Development and commercialization of self-healing concrete is hampered due to a lack standardized test methods. Six inter-laboratory testing programs are being executed by the EU COST action SARCOS, each focusing on methods for specific technique. This paper reports comparison tests mortar specimens with polyurethane encapsulated in glass macrocapsules. First, pre-cracking method was analysed: were cracked three-point bending followed an active crack width control technique restrain up...
Self-healing concrete has the potential to optimise traditional design approaches; however, commercial uptake requires ability harmonize against standardized frameworks. Within EU SARCOS COST Action, different interlaboratory tests were executed on self-healing techniques. This paper reports evaluation of effectiveness proposed experimental methodologies suited for with expansive mineral additions. Concrete prisms and discs MgO-based healing agents produced precracked. Water absorption water...
Capsule-based self-healing is increasingly being targeted as an effective way to improve the durability and sustainability of concrete infrastructures through extension their service life. Assessing mechanical behaviour materials after damage subsequent autonomous repair essential validate possible use in real structures. In this study, mortars containing cementitious tubular capsules with a polyurethanic repairing agent were experimentally investigated. Their under both static cyclic...
In this study, the interface between different types of bacteria-embedded self-healing polylactic acid capsules (PLA) and cement paste is investigated. Particularly, changes in microstructure mechanical properties with respect to bulk were studied. First, nanoindentation was performed obtain maps hardness elastic modulus interfaces. Lattice modeling uniaxial tensile test on mapped locations then overall strength stiffness interface. Moreover, hydrates assemblage chemical composition around...
This paper discusses the combined application of Acoustic Emission (AE) technique and a Lattice Discrete Element Method (LDEM) to study damage process in cement mortar specimens subjected three-point bending tests. The experimental work was carried out previous by research team. contain macro-capsules filled with polyurethane resin that promotes self-healing mechanism upon crack formation. numerical model here developed provides an estimate fracture energy resin, which is difficult obtain...
Abstract This work reports on the self-healing capabilities of mortar specimens with polyurethane encapsulated in two types cementitious macro-capsules, by comparison performance using same healing agent glass capsules, as tested an inter-laboratory testing campaign following a pre-standard procedure. was performed twofold objective checking robustness such procedure for varying capsules and effectiveness new type capsule that has never been used before durability tests. The developed...
Concrete is one of the world’s most used and produced materials, based on its dominant role in construction sector, both for new structures repair, restoration, retrofitting built ones. Recently, research has been focused development innovative solutions to extend service life reinforced concrete structures, specifically by introducing self-healing properties aimed at reducing necessary maintenance interventions and, consequently, environmental impacts. These imply costs financial...
Evolving cracks in consolidated granular media cause a modification of the microstructure area surrounding damaged zone. As consequence, mechanical properties (flexural strength) and elastic characteristics (linear modulus nonlinear parameters) change as well. The same happens during repair, which could be considered symmetric counterpart damaging. Starting from ultrasonic measurements resonance concrete prisms progression damage we propose description evolution, allows to predict observed...
In this study, Computer Vision and Phase‐Based Motion Magnification (PBMM) are validated for continuous Structural Health Monitoring (SHM) purposes. The aim is to identify the exact instant of occurrence damage or abrupt structural changes from video‐extracted, very low amplitude (barely visible) vibrations. study presents three experimental datasets: a box beam with multiple saw cuts different lengths angles, full rectangular cross section mass added at tip, spar prototype High‐Aspect‐Ratio...
The use of capsule-based technology for self-sealing and self-healing cementitious systems has been extensively investigated both macro- microencapsulated additions. In this study, macrocapsules, produced using a novel technique were characterised compared, evaluating mechanical triggering, bonding with the matrix, efficiency upon integration into mortar specimens. Macrocapsules containing commercially available water repellent agent in two ways. Stereolithographic additive manufacturing (3D...
This paper brings a new insight into understanding the influence of macrocapsules in packing systems, which can be useful designing inert structure self-healing concrete. A variety tubular macrocapsules, terms types and sizes, was used to assess capsules' effect packing, together with various aggregate fractions. The voids ratios (U) mixtures were evaluated experimentally compared prediction via particle model Dewar. coarse particles found considerably affected by presence while no on fine...
The use of macrocapsules in self-healing applications offers a potential benefit by carrying larger amount healing agent comparison with microcapsules. However, the application is still limited to paste and mortar levels on lab-scale. This due concern that most capsules might be broken when mixed concrete components. In this study, cementitious tubular were used they considered as partial replacement coarse aggregates (2 vol% gravel). have dimension 54 mm 9 length outer diameter,...
The use of polymer precursors as repairing agents in capsule-based self-healing systems has been extensively studied recent years. In particular, the effectiveness macro-encapsulated polyurethane restoring both watertightness and mechanical properties demonstrated at laboratory level, experimental methods to test have validated following pre-standard procedures. However, macro-capsules containing for field applications not sufficiently implemented yet. For these become appealing construction...
Macrocapsules with an expanding mineral powder were set-up for sealing cracks into cementbased materials. The was composed of a commercial fast setting cement mortar, sodium polyacrylate and product used to produce sparkling water (based on acid carbonate, malic tartaric acid). An optimal proportioning these components determined as 10:1:1, respectively. These compounds first mixed polyethylene glycol cast cylindrical moulds. Then, the mix heated at 230°C in oven cylinders demoulded...
The study of self-healing cementitious materials has gained traction recently due to the research for more sustainable, lasting, and safer structures. performance evaluation such is usually done using static tests, with few studies involving fatigue loading. Moreover, use Acoustic Emission (AE) technique damage structures by means AE parameters as Felicity Ratio, Calm b-value seems not have been covered a greater extent. In this sense, present work aims fill gap described tools analyze level...
Due to its low tensile strength and the presence of defects brought on by improper construction methods or other factors, cracks in concrete are practically inevitable. For reinforced-concrete structures, even if do not necessarily increase risk collapse, they unquestionably hinder aspects such as service life. Self-healing cementitious materials have been developed because growing concern for security sustainability structures. these new be used actual it is essential conduct research into...
The sustainable development of societies can be pursued by simultaneously avoiding the depletion materials and resources reducing greenhouse gases emissions, with related climatic change effects. In order to get this, extension structures service-life plays a significant role in saving natural resources, decreasing overall anthropogenic carbon-footprint, building demolition wastes. achieve such prolongation service-life, one most promising approaches is Smart Structures. These are defined as...