Low-carbon magnesium potassium phosphate cement (MKPC) binder comprising caustic calcined magnesia and potassium hydroxide activated biochar from softwood technical lignin

被引：8

作者：

Opara, Emmanuel Uchechukwu ^{[1
]}

Karthauser, Johannes ^{[1
]}

Kohler, Robert ^{[2
,4
]}

Kowald, Torsten ^{[3
]}

Koddenberg, Tim ^{[1
]}

Mai, Carsten ^{[1
]}

机构：

[1] Georg August Univ Goettingen, Dept Wood Biol & Wood Prod, Busgenweg 4, D-37077 Gottingen, Germany

[2] Univ Appl Sci & Arts, Fac Engn & Hlth, Von Ossietzky Str 99, D-37085 Gottingen, Germany

[3] Univ Siegen, Dept Chem & Biol, Chem & Struct Novel Mat, Paul Bonatz Str 9-11, D-57076 Siegen, Germany

[4] Fraunhofer Inst Surface Engn & Thin Films IST, Applicat Ctr Plasma & Photon, Von Ossietzky Str 100, D-37085 Gottingen, Germany

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 398卷

关键词：

Sustainable Construction; Magnesium Potassium Phosphate Cement; Caustic Calcined Magnesia; Low-carbon cement; Biochar Augmented Cement; FLY-ASH; WOOD; XPS; PYROLYSIS; CERAMICS; SORBENT; PASTE; OXIDE; KOH;

D O I：

10.1016/j.conbuildmat.2023.132475

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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 degrees 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.

引用

页数：13

共 64 条

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