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

[21] Influence of carbonation curing on hydration and microstructure of magnesium potassium phosphate cement concrete [J].

Jeon, In Kyu ;

Qudoos, Abdul ;

Kim, Hong Gi .

JOURNAL OF BUILDING ENGINEERING, 2021, 38

[22] Vacuum Low-Temperature Microwave-Assisted Pyrolysis of Technical Lignins [J].

Karthaeuser, Johannes ;

Biziks, Vladimirs ;

Frauendorf, Holm ;

Mai, Carsten ;

Militz, Holger .

POLYMERS, 2022, 14 (16)

[23] Sulfur abatement in pyrolysis of straw pellets [J].

Khalil, Roger A. ;

Seljeskog, Morten ;

Hustad, Johan E. .

ENERGY & FUELS, 2008, 22 (04) :2789-2795

[24] COLD-SETTING PROPERTIES .2. [J].

KINGERY, WD .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1950, 33 (08) :242-247

[25] Microstructural evolution/durability of magnesium phosphate cement paste over time in neutral and basic environments [J].

Lahalle, Hugo ;

Patapy, Cedric ;

Glid, Marwa ;

Renaudin, Guillaume ;

Cyr, Martin .

CEMENT AND CONCRETE RESEARCH, 2019, 122 :42-58

[26] A comparison of biochars from lignin, cellulose and wood as the sorbent to an aromatic pollutant [J].

Li, Jianfa ;

Li, Yimin ;

Wu, Yunlu ;

Zheng, Mengying .

JOURNAL OF HAZARDOUS MATERIALS, 2014, 280 :450-457

[27] In situ XPS studies of thermally deposited potassium on poly (p-phenylene vinylene) and its ring-substituted derivatives [J].

Li, S ;

Kang, ET ;

Neoh, KG ;

Ma, ZH ;

Tan, KL ;

Huang, W .

APPLIED SURFACE SCIENCE, 2001, 181 (3-4) :201-210

[28] Effects of fly ash and quartz sand on water-resistance and salt-resistance of magnesium phosphate cement [J].

Li, Yue ;

Shi, Tongfei ;

Li, Jiaqi .

CONSTRUCTION AND BUILDING MATERIALS, 2016, 105 :384-390

[29] Technology and method for applying biochar in building materials to evidently improve the carbon capture ability [J].

Liu, Rui ;

Xiao, Huigang ;

Guan, Shen ;

Zhang, Junhui ;

Yao, Da .

JOURNAL OF CLEANER PRODUCTION, 2020, 273 (273)

[30] Effects of water content, magnesia-to-phosphate molar ratio and age on pore structure, strength and permeability of magnesium potassium phosphate cement paste [J].

Ma, Hongyan ;

Xu, Biwan ;

Liu, Jun ;

Pei, Huafu ;

Li, Zongjin .

MATERIALS & DESIGN, 2014, 64 :497-502

← 1 2 3 4 5 6 7 →