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Effect of petrographic composition and chemistry of aggregate on the local and general fracture response of cementitious composites
(Gruppo Italiano Frattura, 2022-03-25)This paper concerns the results of research into the influence of the composition of rock inclusions on the fracture response of cement-based composite specimens. Specially designed specimens of the nominal dimensions 40 ... -
Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer
(Elsevier, 2016-06-01)Fly ash geopolymer is amorphous aluminosilicate material which is considered as alternative to Portland cement concrete. One of the limiting factors of its utilization is an increased shrinkage and related deterioration ... -
Self-sensing performance of metakaolin geopolymer with carbon nanotubes subjected to repeated compressive loading
(IOP Publishing, 2021-12-21)Alkaline activated binders showing enhanced piezoresistive properties have recently attracted increased interest in research of their application in smart self-sensing components. This study is focused on metakaolin ... -
Relationship of Time-Dependent Parameters from Destructive and Non-Destructive Tests of Structural Concrete
(MDPI, 2022-01-30)Reinforced concrete structures are typically exposed to a combination of aggressive substances and mechanical stresses, which contribute to fast degradation. The present research was conducted to evaluate five time-dependent ... -
Fracture parameters of fly ash geopolymer mortars with carbon black and graphite filler
(IOP Publishing, 2021-11-23)In this study, the effect of carbon black and graphite filler on the crack initiation and fracture parameters of fly ash geopolymer mortar is investigated. The carbon black was added in the amount of 0.5 and 1.0% and ... -
Mechanical fracture parameters of concrete drill-core specimens supported by a slenderness ratio study
(IOP Publishing Ltd, 2021-12-21)The detailed analytical and experimental investigation of the fracture behaviour of quasi-brittle materials is an endeavour which has been ongoing worldwide for many years. Such materials are usually characterized in terms ... -
Fracture parameters of alkali-activated aluminosilicate composites with ceramic precursor: durability aspects
(Elsevier, 2021-11-20)Four sets of alkali-activated aluminosilicate (AAAS) composites based on ceramic precursors were studied in terms of their characterization by mechanical fracture parameters as a basis for considerations of durability. ... -
Influence of rock inclusion composition on the fracture response of cement-based composite specimens
(Elsevier, 2021-11-20)This paper concerns the results of research into the influence of the composition of rock inclusions on the fracture response of cement-based composite specimens. Specially designed specimens of the nominal dimensions 40 ... -
Sensitivity analysis of stochastic calculation of SCC regarding aggressive environment
(MDPI, 2021-11-12)Probabilistic procedures considering the durability with respect to corrosion of reinforcement caused by aggressive substances are widely applied; however, they are based on narrow assumptions. The aspects need to be ... -
Deflection of an eccentric crack under mixed-mode conditions in an SCB specimen
(The Publishing Office of Czestochowa University of Technology, 2021-07-26)Crack propagation under mixed-mode (I + II) conditions has been investigated in a semicircular disc where various levels of mixed-mode can be achieved by means of different geometry configurations. The research has been ... -
Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
(MDPI, 2021-10-25)This paper presents the results of an experimental program aimed at the assessment of the freeze–thaw (F–T) resistance of concrete based on the evaluation of fracture tests accompanied by acoustic emission measurements. ... -
Experimental Campaign to Verify the Suitability of Ultrasound Testing Method for Steel Fiber Reinforced Concrete Fortification Structures
(MDPI, 2021-09-24)Fortification structures, both military and civilian, are designed to resist a blast explosion to some extent. Their technical condition after a blast load must be assessed in a fast and reliable way to enable the users' ... -
Development of Variants of High-Performance Self-Compacting Concrete with Improved Resistance to the Attack of Sulfates
(MDPI, 2021-06-26)This paper presents experimental and analytical work of which the main objective was to support the introduction of a new technology for the production of sewer pipes. In this technology, the pipes produced consist of two ... -
Sustainability Levels in Comparison with Mechanical Properties and Durability of Pumice High-Performance Concrete
(MDPI, 2021-05-28)In the production of cement and concrete, mechanical and durable properties are essential, along with reasonable cost and sustainability. This study aimed to apply an evaluation procedure of the level of sustainability of ... -
Numerical analysis of a semi-circular disc with an angled crack loaded in mixed-mode
(Koszalin University of Technology Publishing House, 2020-05-06)A semi-circular disc with an angled crack loaded in mixed-mode (mode I + II) was chosen for a numerical analysis of crack deflection angles. Although the mode I of loading is often dominant in engineering praxis, lots of ... -
Analysis of Acoustic Emission Signals Recorded during Freeze-Thaw Cycling of Concrete
(MDPI, 2021-03-05)This manuscript deals with a complex analysis of acoustic emission signals that were recorded during freeze-thaw cycles in test specimens produced from air-entrained concrete. An assessment of the resistance of concrete ... -
Properties of cement-based composites with carbon mineral admixture
(IOP Publishing, 2020-12-09)In the construction industry, aggregates, in the form of fine powder up to gravel, play a significant role as a stabilizing and filling materials for many applications. With increasing demands on quarrying of this valuable ... -
The influence of biochar addition on the strength and microstructural chraracteristics of cement pastes
(IOP Publishing, 2020-12-09)Nowadays, many branches of civil engineering begin to suffer from the lack of natural high-quality resources. The cement industry is one of the main consumers of such raw materials and, moreover, significantly contributes ... -
Strength characteristics of concrete exposed to the elevated temperatures according to the temperature-time curve ISO 834
(EDP Sciences, 2017-05-24)While exposed to high temperatures caused by fire, the concrete undergoes a sequence of physical and chemical structure changes causing a mechanical degradation. This paper concerns an experimental strength determination ... -
Fracture parameters of concrete after exposure to high temperatures: pilot tests
(EDP Sciences, 2017-05-24)Experimental concrete panels were after an appropriate aging time loaded by high temperatures (550, 600, 800 and 1000 °C) in a furnace intended for fire tests of building materials. These panels were heated according to ...
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