Low-carbon magnesium potassium phosphate cement (MKPC) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin. Opara, E. U., Karthäuser, J., Köhler, R., Kowald, T., Koddenberg, T., & Mai, C. Construction and Building Materials, 398:132475, September, 2023.
Low-carbon magnesium potassium phosphate cement (MKPC) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin [link]Paper  doi  abstract   bibtex   
Biochar augmentation in cementitious materials is attractive for enhancing the products' mechanical properties and improving sustainability. Softwood technical lignin biochar (5 wt-%) was used to augment MKPC as a replacement material, with increased surface area through KOH activation. Hard-burned (1000 °C) MgO was used as precursor. XRD and SEM-EDX analyses showed “struvite-K” as the primary component of the MKPC materials. MKPC materials including the 2-hour KOH-activated biochar showed the lowest porosity, highest strength and stiffness. Replacing MKPC with KOH-activated biochar can increase strength properties and reduce MKPC binder usage, providing a sustainable approach for precast applications.
@article{opara_low-carbon_2023,
	title = {Low-carbon magnesium potassium phosphate cement ({MKPC}) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin},
	volume = {398},
	issn = {0950-0618},
	url = {https://www.sciencedirect.com/science/article/pii/S0950061823021918},
	doi = {10.1016/j.conbuildmat.2023.132475},
	abstract = {Biochar augmentation in cementitious materials is attractive for enhancing the products' mechanical properties and improving sustainability. Softwood technical lignin biochar (5 wt-\%) was used to augment MKPC as a replacement material, with increased surface area through KOH activation. Hard-burned (1000 °C) MgO was used as precursor. XRD and SEM-EDX analyses showed “struvite-K” as the primary component of the MKPC materials. MKPC materials including the 2-hour KOH-activated biochar showed the lowest porosity, highest strength and stiffness. Replacing MKPC with KOH-activated biochar can increase strength properties and reduce MKPC binder usage, providing a sustainable approach for precast applications.},
	language = {en},
	urldate = {2023-07-19},
	journal = {Construction and Building Materials},
	author = {Opara, Emmanuel Uchechukwu and Karthäuser, Johannes and Köhler, Robert and Kowald, Torsten and Koddenberg, Tim and Mai, Carsten},
	month = sep,
	year = {2023},
	keywords = {Biochar Augmented Cement, Caustic Calcined Magnesia, Low-carbon cement, Magnesium Potassium Phosphate Cement, Sustainable Construction},
	pages = {132475},
	file = {Opara et al. - 2023 - Low-carbon magnesium potassium phosphate cement (M.pdf:C\:\\Users\\Eva\\Zotero\\storage\\A9YWI9GE\\Opara et al. - 2023 - Low-carbon magnesium potassium phosphate cement (M.pdf:application/pdf},
}

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