Investigation of the calcined kaolinite content on the hydration of Limestone Calcined Clay Cement (LC3)

By F. Avet, Karen L. Scrivener. 2018

719 citations recorded by the source corpus.

Abstract This study presents the influence of the calcined kaolinite content of calcined clays on the hydration of Limestone Calcined Clay Cements containing 50% of clinker (LC3-50). Above a calcined kaolinite content of 65% in calcined clay, further reaction of clinker is inhibited from 3 days onwards. Detail investigation indicates that this slowing down of clinker hydration is related to a significant refinement of pore connectivity. A limiting critical pore entry radius of 3–5 nm is reached, from which the porosity does not get further refined. The higher the calcined kaolinite content, the faster this refinement limit is reached. The formation of carboaluminate hydrates is also limited after reaching this refinement limit. As a consequence, the on-going reaction of metakaolin impacts C-A-S-H, mainly affecting gel porosity, which is not well characterized by MIP.

Subfields: Civil and Structural Engineering, Environmental Engineering

View Paper: https://www.semanticscholar.org/paper/2486bc8e7d69de5261b38e4a7b321aba486d9605

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In Civil and Structural Engineering

1. F. Zunino
2. Duo Zhang
3. Á. G. Torre
4. A. Kirchheim
5. J. A. Neto
6. He-hua Zhu
7. Hao-liang Wu
8. Karen L. Scrivener

In Environmental Engineering

1. F. Zunino
2. Duo Zhang
3. He-hua Zhu
4. Karen L. Scrivener
5. Victor C. Li
6. Hamed Maraghechi
7. F. Avet
8. Á. G. Torre

Citations in the corpus

• Calcined clay – Limestone cements: Hydration processes with high and low-grade kaolinite clays (2021, background): “[59], and not associated with the specific surface area increase as suggested by Zunino et al. [60].”
• Effects of sulfates on the hydration of Portland cement – A review (2021, background): “The aluminum content of the SCMs may also influence sulfate demand [79,107,109,113,115,118,119,124].”
• Mechanical and self-healing behavior of low carbon engineered cementitious composites reinforced with PP-fibers (2020, background): “However, Avert [43] attests that the internal relative humidity of the specimen decreases less in the LC3 mixture than that in the OPC mixture.”
• Performance of Limestone Calcined Clay Cement (LC3) with various kaolinite contents with respect to chloride transport (2018, methodology): “The amount of C–A–S–H was determined for PC and LC(3)-50 blends by a coupled X-ray diffraction and mass balance approach [34] which also permits the calculation of the reaction degree of metakaolin.”