Effect of coarse basalt aggregates on the properties of Ultra-high Performance Concrete (UHPC)

P.P. Li; Q.L. Yu; H.J.H. Brouwers

doi:10.1016/j.conbuildmat.2018.03.109

Effect of coarse basalt aggregates on the properties of Ultra-high Performance Concrete (UHPC)

Building Materials

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Abstract

In the present research, Ultra-high Performance Concretes (UHPCs) applying coarse basalt aggregate with a maximum particle size of 16 mm are designed by using the particle packing theory and considering optimal powder proportion. The fluidity, shrinkage, strength of paste, and the compressive and tensile splitting strength of UHPC are investigated. The effect of coarse basalt aggregate size and resulting powder content change are evaluated. Furthermore, the mineral admixture effect, interaction between aggregate and steel fibre are analysed and discussed. The results show that the optimal proportion of powder is 5% of micro-silica and 20% of limestone powder by mass of the total powder. The coarse basalt aggregate has limited reducing effect on the mechanical strength of UHPC. The optimal powder content of about 800 kg/m³ and 700 kg/m³ is found for UHPC when the maximum basalt aggregate size is 8 mm and 16 mm, respectively. Furthermore, a distribution modulus q of 0.19 for the modified Andreasen and Andersen model is recommended for designing UHPC with coarse aggregates. The optimal powder contents are the same for UHPC without and with 2 vol% steel fibre, and longer fibre is suggested for UHPC with coarser aggregate.

Original language	English
Pages (from-to)	649-659
Number of pages	11
Journal	Construction and Building Materials
Volume	170
DOIs	https://doi.org/10.1016/j.conbuildmat.2018.03.109
Publication status	Published - 10 May 2018

Funding

This research was carried out under the funds of China Scholarship Council and Eindhoven University of Technology. Thanks are given to Mr. C.P. Chung for his help with experiments in this study. Furthermore, the authors wish to express their gratitude to ENCI for providing the used cement.

Keywords

Coarse aggregate
Compactness
Distribution modulus
Mineral admixture
Powder content
Steel fibre
Ultra-high Performance Concrete

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10.1016/j.conbuildmat.2018.03.109

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title = "Effect of coarse basalt aggregates on the properties of Ultra-high Performance Concrete (UHPC)",

abstract = "In the present research, Ultra-high Performance Concretes (UHPCs) applying coarse basalt aggregate with a maximum particle size of 16 mm are designed by using the particle packing theory and considering optimal powder proportion. The fluidity, shrinkage, strength of paste, and the compressive and tensile splitting strength of UHPC are investigated. The effect of coarse basalt aggregate size and resulting powder content change are evaluated. Furthermore, the mineral admixture effect, interaction between aggregate and steel fibre are analysed and discussed. The results show that the optimal proportion of powder is 5\% of micro-silica and 20\% of limestone powder by mass of the total powder. The coarse basalt aggregate has limited reducing effect on the mechanical strength of UHPC. The optimal powder content of about 800 kg/m3 and 700 kg/m3 is found for UHPC when the maximum basalt aggregate size is 8 mm and 16 mm, respectively. Furthermore, a distribution modulus q of 0.19 for the modified Andreasen and Andersen model is recommended for designing UHPC with coarse aggregates. The optimal powder contents are the same for UHPC without and with 2 vol\% steel fibre, and longer fibre is suggested for UHPC with coarser aggregate.",

keywords = "Coarse aggregate, Compactness, Distribution modulus, Mineral admixture, Powder content, Steel fibre, Ultra-high Performance Concrete",

author = "P.P. Li and Q.L. Yu and H.J.H. Brouwers",

year = "2018",

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doi = "10.1016/j.conbuildmat.2018.03.109",

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journal = "Construction and Building Materials",

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AU - Yu, Q.L.

AU - Brouwers, H.J.H.

PY - 2018/5/10

Y1 - 2018/5/10

N2 - In the present research, Ultra-high Performance Concretes (UHPCs) applying coarse basalt aggregate with a maximum particle size of 16 mm are designed by using the particle packing theory and considering optimal powder proportion. The fluidity, shrinkage, strength of paste, and the compressive and tensile splitting strength of UHPC are investigated. The effect of coarse basalt aggregate size and resulting powder content change are evaluated. Furthermore, the mineral admixture effect, interaction between aggregate and steel fibre are analysed and discussed. The results show that the optimal proportion of powder is 5% of micro-silica and 20% of limestone powder by mass of the total powder. The coarse basalt aggregate has limited reducing effect on the mechanical strength of UHPC. The optimal powder content of about 800 kg/m3 and 700 kg/m3 is found for UHPC when the maximum basalt aggregate size is 8 mm and 16 mm, respectively. Furthermore, a distribution modulus q of 0.19 for the modified Andreasen and Andersen model is recommended for designing UHPC with coarse aggregates. The optimal powder contents are the same for UHPC without and with 2 vol% steel fibre, and longer fibre is suggested for UHPC with coarser aggregate.

AB - In the present research, Ultra-high Performance Concretes (UHPCs) applying coarse basalt aggregate with a maximum particle size of 16 mm are designed by using the particle packing theory and considering optimal powder proportion. The fluidity, shrinkage, strength of paste, and the compressive and tensile splitting strength of UHPC are investigated. The effect of coarse basalt aggregate size and resulting powder content change are evaluated. Furthermore, the mineral admixture effect, interaction between aggregate and steel fibre are analysed and discussed. The results show that the optimal proportion of powder is 5% of micro-silica and 20% of limestone powder by mass of the total powder. The coarse basalt aggregate has limited reducing effect on the mechanical strength of UHPC. The optimal powder content of about 800 kg/m3 and 700 kg/m3 is found for UHPC when the maximum basalt aggregate size is 8 mm and 16 mm, respectively. Furthermore, a distribution modulus q of 0.19 for the modified Andreasen and Andersen model is recommended for designing UHPC with coarse aggregates. The optimal powder contents are the same for UHPC without and with 2 vol% steel fibre, and longer fibre is suggested for UHPC with coarser aggregate.

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KW - Compactness

KW - Distribution modulus

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KW - Powder content

KW - Steel fibre

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JF - Construction and Building Materials

ER -

Effect of coarse basalt aggregates on the properties of Ultra-high Performance Concrete (UHPC)

Abstract

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Keywords

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