Michael Tupý

PVB Sheet Recycling and Degradation

Increasing growth of raw material prices, environmental aspects and still growing landfill fees bring about the increasing interest encountered with the plastics waste recycling. Globally, the problem has been solved for the common plastics such as polyolefins, poly(ethylene terephtalate) and poly(styrene). Though extensively used for the glass lamination, poly(vinyl butyral) (PVB) does not belong to this group. It is generally known that during the glass lamination process, large volume of PVB trim is formed.

Exposure of Mortars Modified with Rubber Aggregates and Polymer Admixtures to Acid Environments and Elevated Temperature Conditions

AbstractThe aim of the present paper was to study the effect of incorporating rubber aggregates and acrylic or EVA polymers on the properties of cement mortar exposed to acid (HCl, H2SO4, HNO3) and elevated temperature conditions. Compressive and bending strength tests, water absorption test, mass measurements, and visual inspection were performed. Impact-echo and impedance spectroscopy methods were used to investigate the effect of heat exposure. The use of rubber aggregates led to reduction of strength values and water absorption. The use of polymeric admixtures further decreased water absorption and inhibited compressive strength loss and delayed mass loss when the specimens were stored in acid solutions. The acoustic and electric measurements showed that the use of rubber aggregates or both rubber aggregates and polymers led to reduction of absorption frequency or relative permittivity, respectively. The drop of frequencies was attributed to the formation of microcracks, as well as to decomposition an...

High-Temperature Degradation of Mortar Containing Rubber Aggregates and EVA Binder Evaluated by Impact-Echo Method

The application of Impact-echo acoustic method to evaluate the degradation and the composition of mortar composites modified with rubber aggregates and EVA polymer binder degraded at high temperatures was studied. Specimens were prepared by using a type CEM I Portland cement and siliceous sand, as well as by substituting 25% of sand with shredded automobile tires and by adding of EVA polymer binder (10% w/w to cement mass). The samples were subjected to high-temperature treatment in the temperature range of 200-400 °C. The results of non-destructive testing of such samples by acoustic methods confirmed the differences in the structure of mortar specimens. Addition of rubber aggregates in samples caused absorption of lower frequency as compared to reference specimens. A significant decrease of the absorbed frequencies was observed depending on the temperature. The largest decrease happened after exposure of samples at 200-300 °C. It indicates that the effect of heat treatment was reduced when the EVA binder was added.

Use of Impact-echo Method to Test High-temperature Degraded Cementitious Composite Materials Containing Rubber Aggregates and Acrylic Polymer Binder

The present paper deals with the use of Impact-echo acoustic method to test cement-based mortar composites degraded at high temperatures. The specimens were prepared by using a type CEM I Portland cement and siliceous sand, as well as by substituting 25% of sand with shredded automobile tires and by adding acrylic polymer binder (20% w/w to cement mass). The samples were were subjected to high-temperature treatment in the temperature range of 200-400 °C. The acoustic results confirmed the differences in the structure of mortar specimens. The addition of rubber aggregates in H2 and H3 specimens resulted in lower frequencies compared to H1 specimen. It was also observed the dropping down of the frequencies for the temperatures between 200-300°C, indicating that the effect of heat treatment was mitigated when the acrylic binder was added.

Resistant Multilayer Floor Systems Based on Epoxy Binders with Recycled Various Glass Particles

The aim of the work was to use common waste glass materials as fillers in polymer resin and to propose the use it for selected multilayer polymer flooring systems which belongs to widespread materials for industrial and also public constructions. Authors decided to use polymer binder based on two different 2-component commercial epoxides Lena N 102 and Lena N 128. Common available secondary materials which replaced original filler were tested in mentioned polymer binder. Tested glass fillers were chosen according its chemical composition and physical properties. Used recycled materials were glass of windscreen, glass beads, screen, glass packaging and fluorescent glass. The filler compatibility with binder matrix was determined according mixture processability, applicability and evaluation of hardened surface.

Development of Resistant Coating Systems Based on Polymer Binders

The aim of the work was to propose the application for waste secondary materials as filler in polymer coating systems. Authors decided to use two different water-based epoxide binders: Lena N141 and Lena N 121 and the waste suitable materials were chosen by its chemical and physical composition and properties. Used recycled materials were glass of windscreen, glass beads, screen, glass packaging and fluorescent glass. The particle size and scanning of grain were determined. The chemical resistance and the adhesion of coating materials to the common substrate were also tested. The chemical resistance was tested with substances: distilled water, oil, petrol, acetone, 20% water solution of NaCl, 50 % water solution of ethanol, 5 % and 30 % water solution of NaOH a 20 % water solution of H2SO4.