6533b860fe1ef96bd12c2e03
RESEARCH PRODUCT
Mechanical and Basic Physical Properties of High-Strength Concrete Exposed to Elevated Temperatures
Eva VejmelkováStefania GrzeszczykLukáš FialaMichaela PetříkováRobert ČErnýLenka ScheinherrováMonika ČáChovásubject
Materials scienceMechanics of MaterialsMechanical Engineering021105 building & constructiontechnology industry and agriculture0211 other engineering and technologiesGeneral Materials Science02 engineering and technologyComposite material021001 nanoscience & nanotechnology0210 nano-technologyHigh strength concretedescription
In this paper, the effect of elevated temperatures on the mechanical and basic properties of two different newly-designed high-strength concretes is studied. The studied materials were prepared from Portland cement, steel fibers, reactive finely milled quartz powder and quartz sand, silica fume, plasticizer, and with a relatively low water/cement ratio of 0.24. The samples were stored in water environment for the first 28 days of hydration to achieve better mechanical properties. Then, after pre-drying at 105 °C to constant mass, the materials were exposed to elevated temperatures of 600 °C and 1000 °C where they were kept for 2 hours. The basic physical properties, such as matrix density, bulk density and open porosity were determined as a function of temperature. Mechanical properties (compressive and flexural strength) were also studied. The measured parameters exhibited a high dependence on temperature and the obtained results pointed to the structural changes of the studied materials. Spalling was not observed because of the pre-drying treatment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 | Key Engineering Materials |