The effect of the type of curing agent on selected properties of epoxy mortar modified with PET glycolisate

Dębska, B.; Lichołai, Lech

doi:10.1016/j.conbuildmat.2016.07.085

Cited by 26 publications

(14 citation statements)

References 22 publications

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“…The most commonly used resins include the thermosetting resins i.e. polyester, epoxy and acrylic [Czarnecki 2010, Lokuge and Aravinthan 2013, Dębska and Lichołai 2016]. These binders show good chemical resistance in aggressive environments, as well as concretes and mortar prepared on the basis of these polymers tend to reproduce the characteristics of the binders used.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Chemical Resistance of Ecological Epoxy Polymer Composites

Dębska¹,

Lichołai²

2018

J. Ecol. Eng.

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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 extended period of time. This article presents the results of the research on weight changes in samples of epoxy mortar modified with poly(ethylene terephthalate) glycolysates, immersed for 5 years in four different aggressive media i.e. 10% aqueous solutions of sulphuric and nitric acids, sodium hydroxide, and sodium chloride. The actual average weight changes obtained were compared with the data calculated on the basis of the regression functions fitted to the data recorded after 3.5 years of exposure. This allowed verification of the model selection correctness and evaluation of the effectiveness of the fitted regression curve. In the case of aqueous sodium hydroxide and sodium chloride solutions, it can be assumed that the logarithmic model describes weight changes well. It was observed that the weight of the samples exposed to NaCl solutions and NaOH stabilizes over prolonged monitoring time and reaches a plateau. However, the weight changes in mortar samples immersed for 5 years in aqueous solution of sulphuric and nitric acids quite significantly differ from the data calculated on the basis of the trend line fitted to the results of the tests carried out after 3.5 years of exposure. It seems that the better solution in this case is the selection of an exponential model. In addition, placing the logarithmic trendlines for all corrosive media together on a chart allows to note which of the solutions is the most aggressive. It was found that after 5 years of immersion in aqueous solutions of acids, mortar samples became brittle, and the observation of their fractures confirmed the weakness of the connection on the resin/aggregate phase boundary. Changes in the appearance of the samples were also noted, namely the surface of samples submerged in a solution of nitric acid strongly yellowed, and those treated with sulphuric acid were tarnished.

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Section: Introductionmentioning

confidence: 99%

Long-Term Chemical Resistance of Ecological Epoxy Polymer Composites

Dębska¹,

Lichołai²

2018

J. Ecol. Eng.

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“…Unfortunately, the price Table 2. Selected physico-chemical properties of curing agent used in the tests [29]. The aggregate was quartz sand, KWARCMIX, Tomaszów Mazowiecki, Poland, with a density of 2.65 g/cm 3 and a grain size of 0-2 mm, in accordance with the requirements of the standard PN-EN 196: 2016 [30].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Mechanical Parameters of Resin Composites with the Addition of Various Types of Fibres

et al. 2020

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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 fibre content on the mechanical properties of mortars. Brittle fracture toughness was also tested using the Cracked Straight Through Brazilian Disc method. The addition of each type of fibre improved the assessed parameters. Based on the obtained research results, and also due to availability and price, the most advantageous seems to be the production of composites containing the addition of polypropylene fibres.

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“…Concrete and resin mortars are cementless composites, which include synthetic resins, their hardeners and aggregate [26][27][28][29]. Epoxy mortars are included in this group of materials.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Applicability of Sustainable Epoxy Composites Containing Waste Rubber Aggregates in Buildings

2019

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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 waste tires were used as a substitute for sand in the amount of 0, 20, 40, 60, 80 and 100% vol. respectively. The available literature lacks information about resin composites that arise with such a large or complete replacement of sand with rubber waste. Along with the increase in the content of waste, the values of strength parameters of composites decreased; however, a material characterized by very low water absorption, that is lightweight and with a low thermal conduction coefficient was obtained. Using the ADINA program, numerical simulations were carried out regarding the temperature distribution in a part of the building structure containing modified rubber mortar. The results of the simulation confirmed the possibility of practical use of the obtained composite due to its good thermal insulation properties. This approach to testing composites modified with rubber waste is innovative.

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The effect of the type of curing agent on selected properties of epoxy mortar modified with PET glycolisate

Cited by 26 publications

References 22 publications

Long-Term Chemical Resistance of Ecological Epoxy Polymer Composites

Long-Term Chemical Resistance of Ecological Epoxy Polymer Composites

Assessment of the Mechanical Parameters of Resin Composites with the Addition of Various Types of Fibres

Assessment of the Applicability of Sustainable Epoxy Composites Containing Waste Rubber Aggregates in Buildings

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