Influence of Washing of Crushed Aggregate on Mechanical Properties of High-Performance Concrete Containing Supplementary Cementitious Materials

Josef Fladr; Petr Bily; Tomáš Trtík; Roman Chylík; Vladimír Hrbek

doi:10.4028/www.scientific.net/SSP.309.26

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Influence of Washing of Crushed Aggregate on Mechanical Properties of High-Performance Concrete Containing Supplementary Cementitious Materials
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Influence of Washing of Crushed Aggregate on Mechanical Properties of High-Performance Concrete Containing Supplementary Cementitious Materials

Abstract:

The paper compares macromechanical and micromechanical properties of high-performance concrete containing supplementary cementitious materials and basalt aggregate. The aggregate was either a common unprocessed crushed basalt aggregate or crushed basalt aggregate the coarse fractions (4/8 and 8/16 mm) of which were washed by water and dried before use. The observed macro-mechanical properties were compressive strength, tensile strength, elastic modulus and depth of penetration of water under pressure; the paper is focused on the first observed property, which is the basic material characteristic. On the microscale, the thickness of the interfacial transition zone (ITZ) was determined by nanoindentation. The positive influence of supplementary cementitious materials and aggregate washing on compressive strength was confirmed and the correlation between macromechanical and micromechanical characteristics was proved.

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Periodical:

Solid State Phenomena (Volume 309)

Pages:

26-30

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.309.26

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Online since:

August 2020

Authors:

Josef Fladr*, Petr Bily, Tomáš Trtík, Roman Chylík, Vladimír Hrbek

Keywords:

Aggregate Washing, High-Performance Concrete, Supplementary Cementitious Materials, Transition Zone

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