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A platform for research: civil engineering, architecture and urbanism
Exploration of hydration and durability properties of ferroaluminate cement with compare to Portland cement
https://orcid.org/0000-0002-9442-6699
Highlights The hydration process of ferroaluminate cement is tested and analyzed. Gas permeability and chloride diffusion coefficient of FAC is much lower than OPC. Pores with size of 10–100 nm have dominant effect on permeability and diffusivity.
Abstract This study investigated the hydration process and durability properties of ferroaluminate cement (FAC). Hydration heat, hydration products, compressive strength, gas permeability and chloride diffusion coefficient were investigated experimentally for FAC mortar samples with different water-to-cement ratio (0.5, 0.45 and 0.4) and were compared with OPC mortar samples with the same mixing proportion. The mechanism of the difference in the durability of two cements was revealed from the perspective of pore size distribution and hydration products. The results show that FAC has a relatively fast hydration rate and the compressive strength at early age is larger than OPC. The gas permeability and chloride diffusion coefficient of FAC mortar samples are approximately 3–4 times lower than that of OPC mortar samples. The permeability and diffusivity of both FAC and OPC decrease significantly when the w/c decreases from 0.5 to 0.4. The main hydration products of FAC are ettringite, ferric hydroxide and aluminum hydroxide gel, large amounts of ettringite make FAC to form a dense structure, the proportion of the pores with pore size of 10–100 nm in FAC sample decreases greatly with compare to the OPC sample, which endows FAC superior impermeability properties.
Exploration of hydration and durability properties of ferroaluminate cement with compare to Portland cement
https://orcid.org/0000-0002-9442-6699
Highlights The hydration process of ferroaluminate cement is tested and analyzed. Gas permeability and chloride diffusion coefficient of FAC is much lower than OPC. Pores with size of 10–100 nm have dominant effect on permeability and diffusivity.
Abstract This study investigated the hydration process and durability properties of ferroaluminate cement (FAC). Hydration heat, hydration products, compressive strength, gas permeability and chloride diffusion coefficient were investigated experimentally for FAC mortar samples with different water-to-cement ratio (0.5, 0.45 and 0.4) and were compared with OPC mortar samples with the same mixing proportion. The mechanism of the difference in the durability of two cements was revealed from the perspective of pore size distribution and hydration products. The results show that FAC has a relatively fast hydration rate and the compressive strength at early age is larger than OPC. The gas permeability and chloride diffusion coefficient of FAC mortar samples are approximately 3–4 times lower than that of OPC mortar samples. The permeability and diffusivity of both FAC and OPC decrease significantly when the w/c decreases from 0.5 to 0.4. The main hydration products of FAC are ettringite, ferric hydroxide and aluminum hydroxide gel, large amounts of ettringite make FAC to form a dense structure, the proportion of the pores with pore size of 10–100 nm in FAC sample decreases greatly with compare to the OPC sample, which endows FAC superior impermeability properties.
Exploration of hydration and durability properties of ferroaluminate cement with compare to Portland cement
https://orcid.org/0000-0002-9442-6699
Highlights The hydration process of ferroaluminate cement is tested and analyzed. Gas permeability and chloride diffusion coefficient of FAC is much lower than OPC. Pores with size of 10–100 nm have dominant effect on permeability and diffusivity.
Abstract This study investigated the hydration process and durability properties of ferroaluminate cement (FAC). Hydration heat, hydration products, compressive strength, gas permeability and chloride diffusion coefficient were investigated experimentally for FAC mortar samples with different water-to-cement ratio (0.5, 0.45 and 0.4) and were compared with OPC mortar samples with the same mixing proportion. The mechanism of the difference in the durability of two cements was revealed from the perspective of pore size distribution and hydration products. The results show that FAC has a relatively fast hydration rate and the compressive strength at early age is larger than OPC. The gas permeability and chloride diffusion coefficient of FAC mortar samples are approximately 3–4 times lower than that of OPC mortar samples. The permeability and diffusivity of both FAC and OPC decrease significantly when the w/c decreases from 0.5 to 0.4. The main hydration products of FAC are ettringite, ferric hydroxide and aluminum hydroxide gel, large amounts of ettringite make FAC to form a dense structure, the proportion of the pores with pore size of 10–100 nm in FAC sample decreases greatly with compare to the OPC sample, which endows FAC superior impermeability properties.
Exploration of hydration and durability properties of ferroaluminate cement with compare to Portland cement
Cheng, Zirui (author) / Zhao, Jihui (author) / Cui, Linyong (author)
2021-12-16
Article (Journal)
Electronic Resource
English
Hydration characteristics of high alumina cement/Portland cement mixtures
| British Library Online Contents | 1998
Chemically modified hydration of Portland cement
| TIBKAT | 1994
Heat of hydration of Portland cement
| Engineering Index Backfile | 1935