Building Materials and Products
Article: received:30.09.2020; reviewed: 15.10.2020; accepted: 19.10.2020; financing: Voronezh State Technical University.
DOI: http://www.dx.doi.org/10.24866/2227-6858/2020-4-12
Belkova N., Stepanova М.
NATALIA BELKOVA, Candidate of Engineering Sciences, Associate professor, verlnata@mail.ru, ORCID: 0000-0002-3005-5956 (corresponding author)
MARIYA STEPANOVA, Candidate of Engineering Sciences, Associate professor, max035@ya.ru
Voronezh State Technical University
Voronezh, Russia
Effect of critical technology parameters on the composite properties on the base of portlandite matrix
Abstract: The results of experimental studies of critical parameters of the technology on the properties of contact-condensation linker-free hardening systems based on portlandite matrix and aluminosilicate filler are presented. The flutter was used as an alumosilicate filler in studies. The main factors affecting on properties of the products obtained with the contact-condensation hardening technology have been revealed. These include, first of all, the characteristics of the filler (mineralogical composition, fineness of grinding) and the technology parameters (matrix to filler ratio, press pressure). Using X-ray phase analysis, it was found that the mineralogical composition of the selected aluminosilicate component (trepel) allows to obtain the composites using contact-condensation technology. The quantitative data on effect of matrix-filler ratio and press pressure value on strength of obtained composite in different hardening periods are obtained. The structure of this composite consists of crystalline splices in the main matrix substance the portlandite with the presence of low-base hydrosilicates and calcium hydroaluminates. It has been established that the optimal flow rate of the filler is 15–30% of the mass of the matrix, the pressing pressure is 80 MPa.
Keywords: portlandite matrix, aluminosilicate component, contact-condensation technology, linkless hardening system, Ishikawa diagram, press pressure
Contribution of the authors. The authors contributed equally to this article.
Conflicts of interests. The authors declare no conflicts of interests.
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