NDLI: The Influence of Ambient Temperature on High Performance Concrete Properties

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The Influence of Ambient Temperature on High Performance Concrete Properties

Content Provider	MDPI
Author	Kaleta-Jurowska, Alina Jurowski, Krystian
Copyright Year	2020
Abstract	This paper presents the results of tests on high performance concrete (HPC) prepared and cured at various ambient temperatures, ranging from 12 $^{\circ}$ C to 30 $^{\circ}$ C (the compressive strength and concrete mix density were also tested at 40 $^{\circ}$ C). Special attention was paid to maintaining the assumed temperature of the mixture components during its preparation and maintaining the assumed curing temperature. The properties of a fresh concrete mixture (consistency, air content, density) and properties of hardened concrete (density, water absorption, depth of water penetration under pressure, compressive strength, and freeze–thaw durability of hardened concrete) were studied. It has been shown that increased temperature (30 $^{\circ}$ C) has a significant effect on loss of workability. The studies used the concrete slump test, the flow table test, and the Vebe test. A decrease in the slump and flow diameter and an increase in the Vebe time were observed. It has been shown that an increase in concrete curing temperature causes an increase in early compressive strength. After 3 days of curing, compared with concrete curing at 20 $^{\circ}$ C, an 18% increase in compressive strength was observed at 40 $^{\circ}$ C, while concrete curing at 12 $^{\circ}$ C had a compressive strength which was 11% lower. An increase in temperature lowers the compressive strength after a period longer than 28 days. After two years of curing, concrete curing at 12 $^{\circ}$ C achieved a compressive strength 13% higher than that of concrete curing at 40 $^{\circ}$ C. Freeze–thaw performance tests of HPC in the presence of NaCl demonstrated that this concrete showed high freeze–thaw resistance and de-icing materials (surface scaling of this concrete is minimal) regardless of the temperature of the curing process, from 12 $^{\circ}$ C to 30 $^{\circ}$ C.
Starting Page	4646
e-ISSN	19961944
DOI	10.3390/ma13204646
Journal	Materials
Issue Number	20
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2020-10-18
Access Restriction	Open
Subject Keyword	Materials Characterization and Testing of Materials Concrete Temperature High Performance Concrete (hpc)
Content Type	Text
Resource Type	Article

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