Szymon Skibicki

West Pomeranian University of Technology · Department of Civil Engineering

In this paper, a new measurement procedure is presented as an experimental study. In this experimental study, a measurement system using the pass-through pulsed ultrasonic method was used. The pilot application of the measurement setup was to monitor mechanical wave changes during the solidification and hardening of fine-grained cement-based compos...

W artykule omówiono badania nad zastosowaniem kruszywa recyklingowego w postaci regranulatu polipropylenowego (PP) w druku 3D kompozytów cementowych. Skupiono się na ocenie wpływu zastąpienia kruszywa naturalnego regranulatem PP na właściwości mechaniczne i reologiczne kompozytu na spoiwie cementowych. Przeprowadzono badania wytrzymałości na zginan...

In the current era, sustainability has gained significant importance within the field of civil engineering. The promising technology of 3D printing for cementitious materials addresses the mentioned challenges. This study provides a briefly overview of the sustainable approach to 3D printed concrete, covering both technological and material aspects...

Technologia wytwarzania przyrostowego (druku3D) z kompozytów cementowych znajduje zastosowanie w prefabrykacjielementów budowlanych oraz w konstrukcji całychobiektów, takich jak domy i mosty. Ta nowatorska metoda przyczyniasię do redukcji kosztów produkcji i skrócenia czasu budowy.Kluczowa jest jednak normalizacja i standaryzacja procesów,by w pełn...

This paper explores the new potential strategy of using fine recycled aggregates (fRA) derived from waste 3D printed concrete (3DPC) as a substitute for cement in additive manufacturing. This study hypothesizes that fRA can optimize mixture design, reduce cement content, and contribute to sustainable construction practices. Experimental programs we...

Significant subsoil deformation and additional loads from the new denitrification unit caused a major problem with the load-bearing capacity of the coal power plant. It was necessary to perform an advanced assessment of the technical condition of the structure. Laser scanning (LiDAR) were used to obtain detailed data upon structure. Based on the an...

This study investigates the printability of one-part brick powder-based alkali-activated materials (AAMs) containing end-of-life brick particles as aggregate. The novel formulation showcases promise for 3D printing of small to medium-sized building blocks, reminiscent of a Lego-type system, capitalising on the rapid setting time inherent to one-par...

https://www.dnibetonu.com/referaty/dni-betonu-2023-2/

Over a million people die in road crashes and tens of millions result injured or disabled each year, globally. Hence, there is a constant concern for improving the safety of the roads to protect road users, and those at the most risk, the road workers. Construction, maintenance, and utility work are constantly needed to ensure safety and functional...

Druk 3D betonu to innowacyjna technologia, która rewolucjonizuje branżę budowlaną. Ten zaawansowany proces pozwala na precyzyjne i zautomatyzowane wytwarzanie trwałych struktur z betonu, wykorzystując spoiwa na bazie cementu do druku. Druk 3D betonu oferuje wiele zalet. Po pierwsze, dzięki temu procesowi możliwe jest tworzenie niestandardowych kszt...

Rozwój technologii druku 3D pozwala na zastosowanie go w wielu obszarach budownictwa, w tym w zakresie małej architektury. Celem pracy było zaprojektowanie i wykonanie w technologii druku 3D obiektu małej architektury – siedziska,z zastosowaniem mieszanki betonowej, w której kruszywo naturalne zostało zastąpione odpadem garnetu pochodzącym z obróbk...

The main objective of this study is to develop 3D printed heavyweight concrete (3DPHWC) to produce elements with a dry density of up to 3500 kg/m3 by replacing natural aggregate (SA) with magnetite aggregate (MA) up to 100%. A comprehensive systematic study was conducted to thoroughly assess mixtures' mechanical properties, physical proficiency, fr...

3D concrete printing technology of cementitious materials is challenging in many aspects. Despite the workability and mechanical properties of a mix and hardened concrete or mortar, the researchers need to face problems with environmental impact and durability of printed elements. Furthermore, today thousands of tons of waste are produced and natur...

This study determines the effect of spent garnet as a replacement for natural sand in 3D-printed mortar at early ages. Five mixes with different spent garnet amounts were prepared (0%, 25%, 50%, 75% and 100% by volume). The ratio of binder to aggregate remained unchanged. In all mixes the water/binder ratio was assumed as a constant value of 0.375....

Few studies have focused on determining the Young’s modulus of 3D printed structures. This study presents the results of experimental investigations of Young’s modulus of a 3D printed mortar. Specimens were prepared in four different ways to investigate possible application of different methods for 3D printed structures. Study determines the influe...

Foundation piles that are made by concrete 3D printers constitute a new alternative way of founding buildings constructed using incremental technology. We are currently observing very rapid development of incremental technology for the construction industry. The systems that are used for 3D printing with the application of construction materials ma...

Use of recycled materials and incorporation of sustainable development ideas are one of the most popular trends in civil engineering. The 3D concrete printing technology which has been developing rapidly in recent years can benefit from use of both of them. The study evaluates the possibility of using PET granules in mixes suitable for 3D printing....

Despite the rapid development of 3D printing technology for cement composites, there are still a number of unsolved issues related to extrusion printing. One of them is proper mix design that allows for meeting criteria related to the printing of cementitious materials, such as pumpability, buildability, consistency on the materials, flowability an...

This paper presents a numerical analysis of the load-carrying capacity of steel open-section columns of a coal power plant structure. The structure was subjected to soil subsidence, which led to considerable structural deformations and damages. As a result, additional stresses appeared in the structure, and the static scheme of the structure was ch...

The design of proper mixes for 3D concrete printing has been already a subject of many studies. Modification to mixes aim to obtain certain properties (extrudability, workability, flowability, open time or buildability) which allow for proper printing of the material. There are different types of reactive or non-reactive mineral additives that were...

The influence of rebar, protruding from concrete element during casting, on temperature and strength development was analyzed. Test models of size 50 cm x 50 cm x 50 cm were made with and without protruding rebar. The rebar protruding from the sample simulated the conditions of the hardening of elements such as bridge abutments or pylons, which req...

Developments in the automation of construction processes, observable in recent years, is focused on speeding up the construction of buildings and structures. Additive manufacturing using concrete mixes are among the most promising technologies in this respect. 3D concrete printing allows the building up of structure by extruding a mix layer by laye...

W pracy przedstawiono zastosowanie skaningu laserowego 3D jako uzupełniającego narzędzia oceny stanu technicznego złożonej stalowej konstrukcji szkieletowej modułu kotłowni elektrowni węglowej. W wyniku znacznego osiadania podłoża wystąpiły uszkodzenia konstrukcji obniżające jej poziom bezpieczeństwa. Do oceny stanu wytężenia i deformacji konstrukc...

The article describes the failure of the steel supporting structure of the pipeline caused by corrosion. The structure in question is a three-span steel bridge with truss girders. The structure was erected in the 1960s and is located above the railway track. Due to the specific shape of the hinges, which join the middle span with the rest of the st...

The purpose of the external walls is to secure the internal microclimate of the building. External walls not only must have proper strength and durability but also prevent heat escape, overheating during summer, protect from noise and increase of humidity. The main parameter that describes the thermal properties of external walls is the heat transm...

The influence of the industrial waste on the surrounding environment has been under surveillance of researchers for many years. Various industrial wastes that need to be stored and disposed of can contaminate water and soil. One of the industrial wastes that has to be disposed is the sand blasting grit or sand blasting residue. Sand blasting is a p...

The concrete during the curing exhibits volume changes caused by different factors: chemical reactions during hydration, surface drying, external temperature or carbonisation. Each aforementioned factor imposes different type of shrinkage that constitutes to the overall shrinkage of concrete. In case of the concretes with a low water/cement ratio,...

PL: Kotłownie budynków głównych elektrowni węglowych posiadają stalową szkieletową konstrukcję nośną o znacznej wysokości ze względu na konieczność podwieszenia kotłów spalinowych. Wymaga to stosowania stężeń pionowych na obu prostopadłych kierunkach w celu przenoszenia obciążeń od wiatru i składowych poziomych sił generowanych przez urządzenia tec...

The article presents overview of additive manufacturing for concrete structures. Study focuses on specific tests used to determine suitability of high performance mixes for 3D printing. The tests include determination of compressive strength and evaluation of printing speed, extrudability and overall surface quality. Tests were performed on a High-...

The 3D Printing of cement composites is one of the fastest developing technologies of modern concrete. The 3D printing involves concretes with high amounts of microfillers. The study analyses the influence of curing conditions on the development of strength of concretes applicable in 3D printing. Ten mixes were tested in the study. In the studied c...

Waste materials are defined as all unwanted substances from manufacturing processes, including mining, industry, agriculture and others. One of the most commonly used waste product in concrete manufacturing is Fly Ash (FA). Studies have shown that the content of Fly Ash increases the workability of concrete, being useful in production of Self-Conso...

High-performance concrete (HPC) which contains increased amount of both higher grade cement and pozzolanic additives generates more hydration heat than the ordinary concrete. Prolonged periods of elevated temperature influence the rate of hydration process in result affecting the development of early-age strength and subsequent mechanical propertie...

The maturity method is a well-known technique for determination of mechanical properties of the concrete (e.g. compressive strength) based on the development of temperature during hardening. The compressive strength of concrete can be used to determine necessary striking time of the formwork. Use of this method for this purpose is economically effe...

Nowadays footbridges designs underline the significance of the architectural form. However, the use of complex forms is sometimes strictly limited by the geometry of elements. The search for more complicated and slender forms significantly increases the costs of raising the structure. Based on the calculations of 300 modeled structures gathered in...

PL: Niewłaściwy sposób usuwania zanieczyszczeń w obszarze posadzki doprowadził do intensywnej korozji słupów w budynku głównym elektrowni. Ubytki korozyjne w sposób istotny zmieniły parametry geometryczne ich przekrojów. Spowodowało to konieczność zastosowania wzmocnienia w celu spełnienia warunków nośności słupów. Osłabione korozyjnie słupy znajdu...