HYDRATION PROCESS AND MECHANICAL PROPERTIES OF CEMENT PASTE WITH RECYCLED CONCRETE POWDER AND SILICA SAND POWDER

Authors

  • Jaroslav Topič Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic
  • Zdeněk Prošek Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic University Centre for Energy Efficient Buildings, Czech Technical University in Prague, Trinecká 1024, 273 43 Buštehrad, Czech Republic

DOI:

https://doi.org/10.14311/APP.2017.13.0125

Keywords:

Cement paste, recycled concrete powder, silica sand powder, hydration process, mechanical

Abstract

Recycled concrete powder (RCP) mostly consisting of cement paste could be reused as partial cement replacement. The aim of this paper is to compare hydration and mechanical properties of RCP and two types of silica sand powder (SSP). Comparison of those materials combined with cement can highlight the binder properties of recycled concrete powder. Using of two types of SSP also show an influence of their fines on hydration process and mechanical properties. Particle size analysis and calorimetric measurement were carried out and mechanical properties such as bulk density, dynamic Young’s modulus and compression strength were examine. Calorimetric measurement proves the presence of exposed non-hydrated particles in RCP that can react again. However lower density of old cement paste in RCP overweight the mentioned potential of RCP and mechanical properties are decreasing compared with reference cement paste and cement paste SSP.

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Published

2017-11-13

Issue

Vol. 13 (2017): NMM 2017 - Nano & Macro Mechanics 2017

Section

Articles

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