Moisture Influence on Compressive Strength of Calcium Silicate Masonry Units-Experimental Assessment and Normative Calculations
| Autor: | Jarosław Strzałkowski, Agata Stolarska, Halina Garbalińska |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope 020209 energy 0211 other engineering and technologies 02 engineering and technology lcsh:Technology Article EDS chemistry.chemical_compound moisture 021105 building & construction 0202 electrical engineering electronic engineering information engineering General Materials Science Composite material lcsh:Microscopy Porosity lcsh:QC120-168.85 Aggregate (composite) lcsh:QH201-278.5 Moisture lcsh:T business.industry Masonry calcium silicates compressive strength Silicate Compressive strength chemistry lcsh:TA1-2040 Calcium silicate SEM lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) business lcsh:TK1-9971 porosity structure |
| Zdroj: | Materials Volume 13 Issue 17 Materials, Vol 13, Iss 3817, p 3817 (2020) |
| ISSN: | 1996-1944 |
| Popis: | This paper primarily assesses the scale of adverse changes to the compressive strength of different types of silicates due to the influence of moisture. The study covers three groups of silicate units of different strength classes&mdash 15, 20 and 25&mdash obtained from three different manufacturers. It was demonstrated that in all studied groups, moisture significantly decreased the compressive strength by about 30&ndash 40%. In addition, microstructural studies were conducted to analyze the relationship between the specific porosity structure of each group of silicate bricks and their compressive strength. On the basis of SEM (Scanning Electron Microscopy) and EDS (Electron Dispersive Spectroscopy) analysis, the elemental composition of individual silicates was determined and the contact zone between the aggregate and the binder was determined, which largely influenced the obtained compressive strength of each silicates. Next, the study referred to the utility of the normative procedure used to determine the strength class of samples with different geometries and at different moisture concentrations. The results of the calculations showed the high accuracy of the normative-based assessment of strength class, regardless of the manufacturer and the moisture values during examination. |
| Databáze: | OpenAIRE |
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