Performance of ultra-high performance concrete (UHPC) with cement partially replaced by ground granite powder (GGP) under different curing conditions

Zhang, Hongru; Ji, Tao; He, Bingjian; He, Lingwei

doi:10.1016/j.conbuildmat.2019.04.058

Cited by 87 publications

(19 citation statements)

References 22 publications

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“…between the aggregate and cement more than the compressive strength [60]. In contrast, the flexural strength was reduced by about 6% for the granite aggregate mix.…”

Section: Flexural Strength Resultsmentioning

confidence: 82%

Properties of eco-friendly cement mortar contained recycled materials from different sources

Nasr

Shubbar

Abed

et al. 2020

Journal of Building Engineering

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“…between the aggregate and cement more than the compressive strength [60]. In contrast, the flexural strength was reduced by about 6% for the granite aggregate mix.…”

Section: Flexural Strength Resultsmentioning

confidence: 82%

Properties of eco-friendly cement mortar contained recycled materials from different sources

Nasr

Shubbar

Abed

et al. 2020

Journal of Building Engineering

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“…In the case of silica-rich cement composite such as UHPC, it is expected that Ca/Si of about 1 can be obtained [43]. The lower Ca/Si demonstrates the overall improved polymerization of C-S-H [44]. By means of silica-rich GGBS replacement, the Ca/Si atomic ratio of C-S-H reduced as a result of the consumption of Ca(OH) 2 in the pozzolanic reaction.…”

Section: Sem Observationsmentioning

confidence: 99%

Hydration heat, strength and microstructure characteristics of UHPC containing blast furnace slag

Yalçınkaya

Çopuroğlu

2021

Journal of Building Engineering

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Ultra-high performance concrete (UHPC) is an innovative cement-based composite with high mechanical performance under tensile and compressive loads, extremely low permeability, and excellent durability. Because of these features, UHPC has the potential to contribute to the development of new architectural perspectives and structural systems with prolonged service life; therefore, it is anticipated that the use of UHPC in cast-in-situ applications will increase in the near future. As a result of its high Portland cement dosage, the hydration heat of UHPC can be relatively high compared to that of conventional concrete. Thus, ground granulated blast furnace slag (GGBS) can be used in UHPC formulation for reducing Portland cement dosage thereby limiting hydration heat while also addressing ecological and engineering concerns. In the scope of this study, the effects of GGBS replacement (0%, 30%, and 60%) on the hydration heat, strength, and microstructural characteristics of UHPC were studied. Results showed that GGBS-bearing UHPCs are more sensitive to ambient temperature in respect to cumulative heat. 60% GGBS replacement reduced cumulative heat release by 36% and 28% at 20 • C and 35 • C respectively. So, the benefit of GGBS on reducing hydration heat is less pronounced in hot weather. Performance differences in strength depending on the replacement ratio were only noticeable on the first day of curing. Prolonged curing time and fiber inclusion eliminated strength differences. Microstructural investigations indicated that Ca(OH) 2 can be lowered up to 0.5%, and the Ca/Si ratio of the C-S-H phase was reduced below the value of 1.0 after 90 days of curing as a result of GGBS replacement.

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“…The pore structure of the cement matrix is improved mainly because GGP is finer than cement, and it can help fill the pores in the hardened cement matrix. It was found that the replacement of 11.5% cement with GGP increases the compressive strength by 15.4% at 28 days than the reference specimen without GGP [ 70 ]. Since GGP works as a filler and does not have a pozzolanic reaction in UHPC, the GGP over an optimum amount yielded lower strength.…”

Section: Effect Of Scms On Materials Properties Of Uhpcmentioning

confidence: 99%

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

Park

Liu

et al. 2021

Materials

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Although ultra high-performance concrete (UHPC) has great performance in strength and durability, it has a disadvantage in the environmental aspect; it contains a large amount of cement that is responsible for a high amount of CO2 emissions from UHPC. Supplementary cementitious materials (SCMs), industrial by-products or naturally occurring materials can help relieve the environmental burden by reducing the amount of cement in UHPC. This paper reviews the effect of SCMs on the properties of UHPC in the aspects of material properties and environmental impacts. It was found that various kinds of SCMs have been used in UHPC in the literature and they can be classified as slag, fly ash, limestone powder, metakaolin, and others. The effects of each SCM are discussed mainly on the early age compressive strength, the late age compressive strength, the workability, and the shrinkage of UHPC. It can be concluded that various forms of SCMs were successfully applied to UHPC possessing the material requirement of UHPC such as compressive strength. Finally, the analysis on the environmental impact of the UHPC mix designs with the SCMs is provided using embodied CO2 generated during the material production.

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Performance of ultra-high performance concrete (UHPC) with cement partially replaced by ground granite powder (GGP) under different curing conditions

Cited by 87 publications

References 22 publications

Properties of eco-friendly cement mortar contained recycled materials from different sources

Properties of eco-friendly cement mortar contained recycled materials from different sources

Hydration heat, strength and microstructure characteristics of UHPC containing blast furnace slag

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

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