Recipe development of low-cost wollastonite-based phosphate cements

Mandel, Kristin; Funke, Henrik; Lindner, Marco; Gelbrich, Sandra; Kroll, Lothar; Schwarz, Thomas

doi:10.1016/j.conbuildmat.2018.08.207

Cited by 17 publications

(3 citation statements)

References 24 publications

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“…Therefore, wollastonite has been used as raw material for producing low pH cements, such as inorganic phosphate cements (ceramics) [32][33][34][35], carbonated wollastonite-based materials [30,36],…”

Section: Introductionmentioning

confidence: 99%

Influence of wollastonite on hydration and properties of magnesium potassium phosphate cements

Lothenbach

Winnefeld

2020

Cement and Concrete Research

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Section: Introductionmentioning

confidence: 99%

Influence of wollastonite on hydration and properties of magnesium potassium phosphate cements

Lothenbach

Winnefeld

2020

Cement and Concrete Research

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“…To date, it appears that fewer research works have actually studied the behaviour of CPC as a building material than its counterpart (i.e. magnesium phosphate cement), although it has relatively cheaper raw materials [1].…”

Section: Introductionmentioning

confidence: 99%

Electrical and Thermal Properties of Wollastonitebased Inorganic Phosphate Cement Modified with Fibres and Recycled Rubber Aggregates

Ajoku¹,

Turatsinze²,

Ariane³

2023

World Congress on Civil, Structural, and Environmental Engineering

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The use of fibres and recycled rubber aggregates to improve the fracture properties of wollastonite-based inorganic phosphate cement would have corresponding effects on the functional properties of the material. In this research, cement composites were designed to incorporate rubber aggregates (i.e. 7.5-17.5 wt%), 1.5% volume fibre contents (i.e. macro polypropylene, amorphous metallic and carbon fibres), and a hybrid blend of both inert materials into the cement matrix. The electrical resistivity of the developed cement composites was measured using the Gamry device while their thermal conductivity was determined based on the guarded hot plate steady state method. It was found that the electrical resistivity of wollastonite-based inorganic phosphate cement increased with increasing curing age at room temperature. The incorporation of rubber aggregates into the cement matrix caused a significant increase and decrease in the electrical resistivity and thermal conductivity respectively, of cementitious composites formed. Meanwhile, as expected, the conductive fibres lowered the electrical resistivity and simultaneously increased the thermal conductivity of the inorganic cement. However, the polypropylene fibres increased both the electrical and thermal properties. Therefore, inert additives which have insulating properties (rubber aggregates and polypropylene fibre) favoured the production of cement composites with improved energy savings in buildings while the conductive (amorphous metallic and carbon) fibres can contribute to the material's smart potential.

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“…Chemically bonded phosphate ceramics (CBPC) are inorganic materials where the chemical reactions take place at low temperatures, as low as room temperature and below it. [1][2][3] These materials are been used for very diverse applications including dentistry materials, 4 biomedicine, 5 solidification and encapsulation of nuclear wastes, 6,7 composites with fillers and reinforcements, [8][9][10] composites with natural fibers, 11 recycling, 12,13 electronic applications, 14 and phase growth controller. 15,16 These materials have not been extensively studied under high-temperature conditions with the exception of little research 17 that have revealed the complexity of the phase transformations, for these ceramics are exposed to high-temperature oxidative environments, typically obtained in fires or extreme environments.…”

Section: Introductionmentioning

confidence: 99%

Cantilever creep method for testing ceramic composites and a case study for chemically bonded phosphate ceramic composites reinforced with glass, carbon and basalt fibers, including both experiments and simulations

Colorado

Velásquez

Hiel³

2020

Journal of Composite Materials

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This paper presented the cantilever beam experiments and the method for creep in chemically bonded ceramics reinforced with glass, carbon, and basalt unidirectional fibers. The ceramic composite samples were fabricated by mixing wollastonite powder and phosphoric acid, through the resonant acoustic mixing technique. The reinforced fibers were added via pultrusion process. The manufactured materials were exposed to high temperature creep tests at 600, 800 and 1000℃, with an annealing time of 1 h, all in air environment. Some examples of real large-scale structures made manually by a company were also included. In order to understand the microstructure, X-ray diffraction and scanning electron microscopy analysis were included. The presented method is simple and can be used in any inorganic ceramic slurry types, such as geopolymers, phosphate cements, clay-based materials, or Portland cement composites. The sample response in high temperature creep experiments was analyzed with a new but very simple technique, and modeled using finite element analysis over all compositions. Results revealed that fibers have a significant effect on the composite creep when compared to the ceramic without reinforcement, and particularly carbon fibers showed a quite interested effect in reducing the creep effects. Results show the limit of the materials under conditions typically found in fires and other extreme environments.

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Recipe development of low-cost wollastonite-based phosphate cements

Cited by 17 publications

References 24 publications

Influence of wollastonite on hydration and properties of magnesium potassium phosphate cements

Influence of wollastonite on hydration and properties of magnesium potassium phosphate cements

Electrical and Thermal Properties of Wollastonitebased Inorganic Phosphate Cement Modified with Fibres and Recycled Rubber Aggregates

Cantilever creep method for testing ceramic composites and a case study for chemically bonded phosphate ceramic composites reinforced with glass, carbon and basalt fibers, including both experiments and simulations

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