| Abstract [eng] |
The aim of the research carried out during the preparation of the master’s thesis is to produce biocomposite samples with different types of binders and various organic wastes, curing them naturally and in a CO2 gas environment, and to determine the physical and mechanical properties of these materials using the results obtained from experiments. The main composition of the samples consists of hemp shives filler. The thesis consists of an introduction, a literature review, a description of the materials used, the equipment, and the production of the samples, the methodology of the studies, the results of the experiments and their analysis, and conclusions. The literature analysis examined the production options for the production of pressed biocomposites using different fillers and binders, different production methods and different curing processes. The analysis of the sources describes the properties of the biocomposite, the applications and the influence of the composition of the pressed biocomposite on the properties of the material. The master’s thesis continues with a description of the materials used, the equipment and the sample production process. The whole production process is broken down into four parts according to the type of binder used, providing useful information in tables with photographs of the samples. The methodology section examines the experiments carried out, explains the calculation equations and indicates the curing methods used, with samples cured both naturally and in a CO2 environment. The analysis of the experimental results shows that the specimens made with treated hemp shives withstand a higher compressive force than those made with dry untreated shives. The strongest materials suitable for forming load-bearing structures were made of cementitious binder, dolomitic siftings or fine sand and treated hemp shives filler, with a compressive strength of 6,5 MPa. The experiments showed that the compressive strength was strongly influenced by carbonisation, with the best results in both the depth of carbonisation and the compressive strength being obtained from carbonisation in a CO2 chamber. The materials suitable for thermal insulation were obtained without the addition of heavy fillers, with densities ranging from 260 kg/m3 to 500 kg/m3 and thermal conductivities ranging from 0,07 W/mK to 0,12 W/mK. Having fulfilled all the aims and objectives of the work, 8 conclusions are presented on the literature analysis, the design of the composition of the pressed biocomposite, the results of the experiments, on the production process and the possibilities of application. The final master’s thesis is 58 pages long. The thesis consists of 13 tables, 40 figures and 46 references. |
