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IMPOSED THERMAL STRESSES IN HIGH PERFORMANCE CONCRETE MODIFIED WITH MICROSILICA

Jolanta Borucka-Lipska

First published: 2017-06-20https://doi.org/10.5593/sgem2017/62/s26.027View metrics

Abstract

Silica fume is a waste product created in the production process of metallic silicon, ferrosilicon and other silicon alloys in the electric arc furnace with or without heat recuperation of flue gasses. Microsilica as a waste hazardous to the environment after years of studies in laboratories and science institutes found its use in civil engineering. The utilization of silica fumes in civil engineering is mostly visible in the technology of high performance concretes (HPC). The examination of imposed thermal stresses was performed on specimen of HPC modified with microsilica, on a specially designed test bench in the laboratory of Department of Reinforced Concrete and Concrete Technology at the West Pomerania University of Technology in Szczecin. The paper presents the results of laboratory simulations of setting and hardening conditions of high performance concrete with silica fume in mass structures. The increase of the hardening temperature imposes strains and stresses on the interior of the structure. Based on performed research it was showed that the risk of crack appearance depends both on increase of temperature generated by hydration heat as well as on elastic, strength and rheological properties of concrete.

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Publication details

Title
IMPOSED THERMAL STRESSES IN HIGH PERFORMANCE CONCRETE MODIFIED WITH MICROSILICA
Authors
Jolanta Borucka-Lipska
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Nano, Bio and Green - Technologies for a Sustainable Future
Publisher
STEF92 Technology
Year
2017
Pages
207-214
SWS Citekey
Borucka-Lipska201726207214
ISSN
1314-2704
ISBN
978-619-7408-13-3
Language
en
Publication type
Conference Paper
Keywords
High Performance Concretethermal stresswaste modified concretessilica fumewaste product
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