Polistireninis putplastis: fizikinių ir mechaninių savybių įvertinimas

Abstract

Monografijoje pateikta gaminių iš polistireninio (EPS, angl. expanded polystyrene) putplasčio fizikinių ir mechaninių savybių įvertinimas. Išnagrinėtos putplasčio stiprumo ir deformacinės savybės veikiant gniuždymo, tempimo ir šlyties apkrovoms, šilumos laidumas, sorbcinės savybės ir vandens įgeriamumas (mirklumas) visai panardinus. Aprašyti nagrinėtų charakteristikų matematiniai-statistiniai modeliai, paaiškintos pagrindinių savybių rodiklių skaičiavimo lygčių ir formulių taikymo galimybės, pateikta atitinkamų parametrų nustatymo praktinių rekomendacijų. Knyga skirta technikos specialybių studentams, dėstytojams, projektavimo ir gamybos organizacijų darbuotojams.

The experiments were performed employing EPS slabs manufactured applying the non-pressing method, i.e. foaming a raw material in a closed container to shashape beads – solid granules of 0.9–2.5 mm in diameter produced by leading European companies such as STYROCHEM (Finland), BASF (Germany), RIGIPORE BP (United Kingdom), NOVA CHEMICAL (Holland), HEMOSERVIS-DWORY A.S. (Poland). The authors did their best to follow recommendations for EN 13163 to analyse the results of experimental investigations into a wide range of EPS characteristics. The monograph consists of the introduction and 6 chapters. In the first chapter, the authors set forth general information on the production technique for EPS, structural indices of porous materials, requirements for EPS used as a thermal insulation material in structural units and the peculiarities of calculating the structural units of walls with EPS used as insulation. The second chapter deals with the following mechanical properties of expanded polystyrene: –characteristics of strength upon compression (initial module of elasticity, deformability, prediction of deformability, active and passive deformation); fleexural strength; –tensile strength and initial module; –shear strength and deformability. The statistical evaluation of data on EPS investigations allows for a considerably wider look at the interaction of diferent parameters than it was possible bearing in mind their arithmetic values only. For describing the EPS properties of strength and deformation, the phenomenological-statistical approach was adopted, i.e. the total structure of relationships was built based on phenomenological considerations while the mathematical description was done on a statistical basis. [...].