Mechanical Properties of Ultra-High Performance Concrete with Partial Utilization of Waste Foundry Sand

Smarzewski, Piotr

doi:10.3390/buildings10010011

Cited by 31 publications

(9 citation statements)

References 35 publications

(94 reference statements)

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“…High performance concrete (HPC) is a concrete based on a cement matrix with natural aggregate and added additives and admixtures, which is distinguished by, among others, good workability for at least 1 h, compressive strength over 60 MPa at 28 days, and water/binder ratio less than 0.4. In order to obtain a tighter structure of the mixture, micro-fillers and nanoparticles are used, e.g., fly ash, silica fume, ground granulated blast furnace slag, metakaolin, and nano-silica [1][2][3][4][5][6][7][8][9][10]. Compared to normal strength concrete, HPC has a more homogeneous and dense structure with a smaller number of pores and shrinkage cracks occurring.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Studies of High Performance Concrete with Condensed Silica Fume

Smarzewski

2023

Applied Sciences

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This article is an extended version of the conference paper “Influence of silica fume on mechanical and fracture properties of high performance concrete” published in Procedia Structural Integrity as a part of the Special Issue for the 3rd International Conference on Structural Integrity (ICSI 2019). Tests were carried out to evaluate the compressive strength, tensile splitting strength, modulus of elasticity, flexural strength, and fracture properties of high performance concretes (HPC) having different levels of condensed silica fume (CSF) replacements for cement. It was found that CSF replacement for cement by up to 25% may have a favorable effect on the mechanical properties. HPC containing CSF was characterized by quite large increases in compressive strength (up to 14%) and flexural strength (16%). However, the most significant improvements in mechanical properties were obtained for splitting tensile strength (26%) and fracture energy (30.5%). There were slight reductions up to 2% in the elastic modulus, flexural strength and fracture properties at the 25% level of CSF substitution for cement. Microstructural studies showed that the narrowest microcracks and the smallest pores in the interfacial transition zone (ITZ) between the paste and grains of aggregate occurred in the HPC having 10% CSF. In addition, a reduction of ITZ around the aggregate and the formation of more high-strength hydration products was observed in all CSF-added HPCs. The outcomes reported that CSF can successfully replace cement. It is suggested that the substitution should not exceed 20%.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Studies of High Performance Concrete with Condensed Silica Fume

Smarzewski

2023

Applied Sciences

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“…It can be reintegrated into the steelmaking process as a ux or aggregate, thereby curbing the consumption of raw materials and energy. Furthermore, cinder nds application in construction materials like concrete and asphalt, offering a sustainable substitute for conventional aggregates[6], [7]. On a global scale, the iron and steel industry annually yield millions of tons of cinder.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Development of Alkali-Activated Bricks using Cinders

Oraon,

2024

Preprint

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This study investigates the feasibility and efficacy of utilizing cinder, a byproduct of industrial processes, as a fine aggregate in the production of geopolymer bricks. Geopolymer technology offers a promising alternative to conventional brick manufacturing methods by utilizing industrial by-product materials and reducing the environmental impact associated with traditional clay brick production. The research focuses on optimizing the geopolymer formulation by varying the proportions of cinder, alkali activator, and other additives to achieve desirable properties such as compressive strength, and durability performance. Mechanical property compressive strength is evaluated along with durability aspects such as water absorption, and efflorescence. For this purpose, five different brick compositions were synthesized with fly ash, GGBS, and Cinder along with Na2SiO3sol.The raw materials underwent characterization through different methods including X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The resulting bricks exhibited a peak compressive strength of 12.11 MPa and a minimal water absorption rate of 15%. Notably, the use of 8% Na2SiO3as an alkaline activator, combined with fly ash and GGBS, enabled the incorporation of over 30% cinder, resulting in the production of high-quality bricks under ambient curing conditions.The results demonstrate the potential of incorporating cinder as a fine aggregate in geopolymer bricks, offering a sustainable solution for waste utilization and contributing to the development of environmentally friendly building materials.

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“…Research on low-emission concrete, also called green concrete, is focused on waste recycling [ 1 , 2 ] and the reduction of Portland clinker in the concrete composition without affecting mechanical properties. Concrete additives, such as fly ash and blast furnace slag, are used for this purpose [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fly Ash Additive on the Properties of Concrete with Slag Cement

2020

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This paper presents research on the impact of fly ash addition on selected physical and mechanical parameters of concrete made with slag cement. Experimental tests were carried out to measure the migration of chloride ions in concrete, the tightness of concrete exposed to water under pressure, and the compressive strength and tensile strength of concrete during splitting. Six series of concrete mixes made with CEM IIIA 42.5 and 32.5 cement were tested. The base concrete mix was modified by adding fly ash as a partial cement substitute in the amounts of 25% and 33%. A comparative analysis of the obtained results indicates a significant improvement in tightness, especially in concrete based on CEM IIIA 32.5 cement and resistance to chloride ion penetration for the concretes containing fly ash additive. In the concretes containing fly ash additive, a slower rate of initial strength increase and high strength over a long period of maturation are shown. In accordance with the presented research results, it is suggested that changes to the European standardization system be considered, to allow the use of fly ash additive in concrete made with CEM IIIA 42.5 or 32.5 cement classes. Such a solution is not currently acceptable in standards in some European Countries.

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Mechanical Properties of Ultra-High Performance Concrete with Partial Utilization of Waste Foundry Sand

Cited by 31 publications

References 35 publications

Mechanical and Microstructural Studies of High Performance Concrete with Condensed Silica Fume

Mechanical and Microstructural Studies of High Performance Concrete with Condensed Silica Fume

Sustainable Development of Alkali-Activated Bricks using Cinders

Influence of Fly Ash Additive on the Properties of Concrete with Slag Cement

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