Bernardeta Dębska

Rzeszów University of Technology · Department of Building Engineering

The article contains the results of selected tests of physical and mechanical properties of mortars differentiated in terms of the binder used: cement, epoxy, epoxy modified with PET waste glycolysate and polyester. Each type of mortar was modified by partial (0–20% vol.) substitution of sand with an agglomerate made from waste polyethylene. The ob...

Polyurethane foams with incorporated starch described in up to date literature have good functional properties except flame resistance. Their oxygen index falls within 19.3–20.5%, while flame rate is 2.25–12.50 mm/s. We have obtained and tested polyurethane foams with following flame retardants: melamine, and two phosphoric(V) acid esters: Fyrol PN...

The article describes the results of a study to determine the simultaneous effect of polyethylene terephthalate waste (PET) and polyethylene (PE) on the strength characteristics and bulk density of epoxy mortars. In these mortars, 9 wt.% of the polymer binder was replaced by glycolysate which was made from PET waste and propylene glycol. Additional...

New method of synthesis of polyetherols from starch in aqueous solution was elaborated. Starch was converted into polyetherols by reactions with alkylene carbonates. The products are mixtures of starch-derived polyetherols and products of hydroxyalkylation of water. The elaborated method can be useful, eco-friendly synthetic route avoiding burdenso...

The article describes tests of epoxy mortars containing waste glass, which was a substitute for sand in an amount of 0 to 100% by weight. The application of the method of planning the experiment using a central composition plan enabled the obtaining of full information about the effect of the modifier and the amount of resin on the mortar propertie...

Industries related to the acquiring of building materials may soon face a shortage of natural resources and an associated increase in costs of their acquisition. Therefore, it is necessary to look for possible ways to reduce the exploitation of natural resources and instead use recycled raw materials. Such policies fit into one of the most impor...

The article describes tests of epoxy mortars after the addition of fibres. The fibres were a substitute for sand in the amount of 0, 1, 2, 3, 4 and 5% by volume, respectively. Three types of mortar were obtained, containing polypropylene, glass and carbon fibres, respectively. Statistical analyses (ANOVA) were carried out to assess the impact of fi...

The assumptions of the low-carbon economy and sustainable development in construction leads to the search for ecological solutions in materials whose production generates significant amounts of carbon dioxide. Cement substitution with waste glass powder used in building mortars is part of this trending solution. This paper describes the results...

The article presents a comparative analysis carried out using three methods, determining the heat transfer coefficient U for a ceramic product modified with a phase change material (PCM). The purpose of the article is to determine the convergence of the resulting thermal characteristics, obtained using the experimental method, numerical simulation,...

The article concerns the possibility of obtaining modified cement mortars and assessment of their selected properties, i.e. bending and compressive strength, volume density of hardened mortars and water absorption. The modification consisted in a partial (0-50% vol.) substitution of sand by waste, crushed rubber, and cork. In the mortar design proc...

The dynamic development of the automotive industry and improvements in quality of life have caused a significant increase in the production of car tires. Unfortunately, when the useful life of these products comes to an end, the problem of their disposal arises. The article presents the results of tests of epoxy mortars in which granules made from...

The contemporary building sector needs new technologies for reducing the energy consumption in heating and cooling processes used in building interiors. These solutions should be integral to ensuring the comfort of using such premises. Phase change materials (PCM) that absorb, accumulate and return large amounts of heat energy as part of their phas...

In the work, the design of experiments (DOE) method was used to obtain a modified epoxy resin of reduced fragility. As modifiers of commercial epoxy resin, urethane prepolymers with isocyanate terminal groups were used. Experimental points (samples of specified composition of resin prepolymer and a curing agent) were generated by the STATISTICA pro...

Resin concretes belong to a small group of building materials which, besides high strength parameters, also have a very good chemical resistance. This is confirmed by the studies carried out by various research institutions around the world. However, there is little data on the behaviour of composite resin exposed to corrosive solutions for an exte...

The article presents a patent proposition of a composite – sandwich panel made of aerogel mat and a composition of encapsulated phase-change material PCM and epoxy resin modified by glycolysis based on poly(ethylene terephthalate) waste. A multifunctional thermal insulation material with a large heat capacity was obtained. This ability makes it pos...

Aggregates, or granular materials, are currently one of the most sought-after construction materials. Natural aggregate deposits are quite common in the world, but their widespread consumption and progressive environmental degradation forces many countries to take measures to reduce the depletion of natural resources. One of the solutions is the us...

Resin mortars belong to the group of concrete-like construction composites. They are obtained by mixing a synthetic resin with a hardener and an appropriately selected aggregate. The latter component is usually as much as 90% of the composite mass and can largely shape the characteristics of the finished product. The fact that the type of filler us...

The results of the article are part of an extensive research on new building materials including cement-free polymer composites where the binder is epoxy resin modified with glycolyzates obtained from poly (ethylene terephthalate) waste (PET). The investigation conducted con-firmed that there is a possibility of using waste materials in the product...

Resin concretes are composites in which a cement binder has been completely replaced by a synthetic resin. These materials are a good choice for the construction industry, especially in solutions requiring high strength, fast curing and durability. Polymer mortars are mainly used for the manufacture of industrial floors and prefabricated products s...

Contemporarily designed, new polymer concrete-like composites are increasingly often used in construction, particularly where high chemical resistance of the material is important. However, their widespread use is limited, mainly due to the cost of resin binders used. This is a significant problem, especially in a situation where it is necessary to...

In recent years, the idea of sustainable development has become one of the most important requirements of civilization. Development of sustainable construction involves the need for the introduction of innovative technologies and solutions that will combine beneficial economic effects with taking care of the health and comfort of users, reducing th...

In the area of chemical applications in construction they are new materials, which do not have equivalents in nature. Polymers can be used to successfully replace traditional materials of the wood, metal or ceramics types. Among the polymers, one of the most important groups are epoxy resins, whose popularity stems from a combination of excellent m...

Racjonalna gospodarka odpadami stanowi jeden z priorytetowych kierunków szeroko rozumianej ochrony środowiska. Fakt umiejętnego zagospodarowania odpadów jest także ważny w kontekście zrównoważonego rozwoju społeczeństw. Do odpadów wyjątkowo uciążliwych dla środowiska zaliczyć należy tworzywa sztuczne. Wzrastające nieustannie ilości tego typu odpadó...

Ogromne ilości powstających odpadów stały się jednym z najważniejszych problemów środowiskowych. Zwiększona aktywność w dziedzinie budownictwa sprawia, że dużą część odpadów stałych stanowią odpady budowlane i rozbiórkowe. Konieczność zrównoważonego wykorzystania naturalnych zasobów i negatywne skutki niewłaściwej utylizacji odpadów, sprawiają, że...

Modern concrete-like polymer composites rate now among the most important materials in building industry. However, their general use is rather limited because their production is more expensive than that of ordinary concretes, first of all because of the high cost of resins applied. For these reason as well as on account of the idea of sustainable...

Work connected with the obtaining and investigating of the properties of epoxy mortars usually generates high cost. It also takes lots of time and effort. A partial elimination of those drawbacks is possible when the statistical methods of designing the experiment are applied. The article presents partial results of the research into epoxy mortars...