Influence of elevated curing temperature on the properties of cement paste and concrete at the same hydration degree

Wang, Qiang; Mengxiao, Shi; Wang, Dengquan

doi:10.1007/s11595-017-1751-2

Cited by 18 publications

(9 citation statements)

References 30 publications

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“…This results in a more porous microstructure of the cement paste and a reduction in the volume occupied by the C-S-H phase. Higher porosity of cement pastes cured at elevated temperatures was also found by the authors [ 7 ]. The result is lower strength of the paste and lower durability of the resulting material.…”

Section: Introductionsupporting

confidence: 79%

The Influence of Ambient Temperature on High Performance Concrete Properties

Kaleta-Jurowska

Jurowski

2020

Materials

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This paper presents the results of tests on high performance concrete (HPC) prepared and cured at various ambient temperatures, ranging from 12 ∘C to 30 ∘C (the compressive strength and concrete mix density were also tested at 40 ∘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 ∘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 ∘C, an 18% increase in compressive strength was observed at 40 ∘C, while concrete curing at 12 ∘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 ∘C achieved a compressive strength 13% higher than that of concrete curing at 40 ∘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 ∘C to 30 ∘C.

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Section: Introductionsupporting

confidence: 79%

The Influence of Ambient Temperature on High Performance Concrete Properties

Kaleta-Jurowska

Jurowski

2020

Materials

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“…Embedding a boron atom into polycyclic aromatic hydrocarbons (PAHs) is an effective way to alter their structural and electronic properties . In particular, BN/CC isosterism resulted in boron/nitrogen-containing PAHs (BN-PAHs), in which the boron and nitrogen atoms have complementary electron-accepting and -donating properties, and they have attracted great attention due to their potential to create new optoelectronic materials . The mono-BN PAHs are the most common examples of BN-PAHs , whereas bis-BN PAHs have often existed in larger sized PAHs .…”

mentioning

confidence: 87%

Synthesis, Properties, and Reactivity of Bis-BN Phenanthrenes: Stepwise Bromination of the Main Scaffold

Zhang

et al. 2020

Org. Lett.

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Two bis-BN phenanthrenes have been synthesized. Their photophysical properties are different from those of the reported mono-BN phenanthrenes. Moreover, the stepwise bromination of bis-BN phenanthrene 8 gave a series of brominated bis-BN phenanthrenes, with all of the mono-, di-, tri-, and tetrabrominated bis-BN phenanthrenes being successfully isolated and characterized. In addition, preliminary results showed that mono- and dibrominated species can be further functionalized by cross-coupling reactions.

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“…Doping with heteroatoms is an effective way to tune the properties of polycyclic aromatic hydrocarbons (PAHs) . In particular, BN-codoped PAHs, in which pairs of C atoms have been replaced by BN units, have attracted great interest, because of their potential to create new optoelectronic materials . In fact, several BN-PAHs have been reported to be highly effective and sometimes superior to their carbonaceous analogues in fields such as organic field-effect transistors (OFETs) .…”

mentioning

confidence: 99%

“…In fact, several BN-PAHs have been reported to be highly effective and sometimes superior to their carbonaceous analogues in fields such as organic field-effect transistors (OFETs) . While many BN-perturbed analogues of PAHs now exist, , the fundamental understanding of the effect of BN/CC replacement on the structure and properties of the PAHs must be improved. Thus, the basic knowledge obtained from simple BN-PAHs is highly valuable.…”

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confidence: 99%

BN-Phenanthrenes: Synthesis, Reactivity, and Optical Properties

Zhang

Sun

et al. 2019

Org. Lett.

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Two series of BN-phenanthrenes, including the parental compounds, have been synthesized in an efficient manner from commercially available materials. Both parental BN-phenanthrenes are strongly fluorescent in solution. Their absorption and emission spectra are greatly dependent on the BN position and orientation. Moreover, the reactivities of the two series of BN-phenanthrenes toward electrophiles are completely different, and these species can be further functionalized by cross-coupling reactions.

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Influence of elevated curing temperature on the properties of cement paste and concrete at the same hydration degree

Cited by 18 publications

References 30 publications

The Influence of Ambient Temperature on High Performance Concrete Properties

The Influence of Ambient Temperature on High Performance Concrete Properties

Synthesis, Properties, and Reactivity of Bis-BN Phenanthrenes: Stepwise Bromination of the Main Scaffold

BN-Phenanthrenes: Synthesis, Reactivity, and Optical Properties

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