Mechanical properties and microstructure of slag and fly ash alkali-activated lightweight concrete containing miscanthus particles

被引：6

作者：

Ntimugura, Fabrice ^{[1
]}

Vinai, Raffaele ^{[1
]}

Dalzell, Martin ^{[1
]}

Harper, Anna ^{[1
]}

Walker, Pete ^{[2
]}

机构：

[1] Univ Exeter, Coll Engn Math & Phys Sci, Exeter EX4 4QF, Devon, England

[2] Univ Bath, BRE Ctr Innovat Construct Mat, Dept Architecture & Civil Engn, Bath BA2 7AY, Avon, England

来源：

MATERIALS LETTERS | 2022年 / 312卷

基金：

英国自然环境研究理事会;

关键词：

Bio-based materials; Strength; Microstructure; Miscanthus; Alkali-activated binders;

D O I：

10.1016/j.matlet.2022.131696

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To improve the early age strength of miscanthus-based composites, alkali-activated binders (ground granulated blast furnace slag and fly ash: AASF) were investigated against Portland cement. The impact of miscanthus content on strength development was assessed at three levels of aggregate to precursor binder mass ratio (0.27, 0.43 and 0.76). For the same aggregate to binder ratio, AASF mixes developed compressive strengths exceeding 1.3 MPa at 5% strain, seven times higher than those obtained with Portland cement, with the bulk density values measured in the range of 910-1070 kg/m(3). However, these values for vegetal concretes remain lower than nonvegetal concretes of similar apparent densities such as those made with polystyrene aggregates. The analysis of the microstructure of AASF composites indicates a strong interfacial transition zone, showing microstructural features that suggest the achievement of a complete reaction.

引用

页数：4

共 15 条

[1] Influence of chemical treatments of miscanthus stem fragments on polysaccharide release in the presence of cement and on the mechanical properties of bio-based concrete materials [J].

Boix, Estefania ;

Gineau, Emilie ;

Narciso, Joan Onate ;

Hofte, Herman ;

Mouille, Gregory ;

Navard, Patrick .

CEMENT & CONCRETE COMPOSITES, 2020, 105

[2] Bio-based ultra-lightweight concrete applying miscanthus fibers: Acoustic absorption and thermal insulation [J].

Chen, Y. X. ;

Wu, F. ;

Yu, Qingliang ;

Brouwers, H. J. H. .

CEMENT & CONCRETE COMPOSITES, 2020, 114

[3]

Courard L., 2017, SUSTAIN BUILD, V2, P3, DOI DOI 10.1051/SBUILD/2017004

[4] Machine learning in mix design of Miscanthus lightweight concrete [J].

Dias, Patrick Pereira ;

Jayasinghe, Laddu Bhagya ;

Waldmann, Daniele .

CONSTRUCTION AND BUILDING MATERIALS, 2021, 302

[5] Optimisation of the mechanical properties of Miscanthus lightweight concrete [J].

Dias, Patrick Pereira ;

Waldmann, Daniele .

CONSTRUCTION AND BUILDING MATERIALS, 2020, 258

[6] A novel material for lightweight concrete production [J].

Kan, Abdulkadir ;

Demirboga, Ramazan .

CEMENT & CONCRETE COMPOSITES, 2009, 31 (07) :489-495

[7] Mechanical properties of geopolymer composites reinforced with natural fibers [J].

Korniejenko, K. ;

Fraczek, E. ;

Pytlak, E. ;

Adamski, M. .

ECOLOGY AND NEW BUILDING MATERIALS AND PRODUCTS 2016, 2016, 151 :388-393

[8]

Ntimugura F., 2021, ICBBM 2021

[9] Environmental performance of miscanthus-lime lightweight concrete using life cycle assessment: Application in external wall assemblies [J].

Ntimugura, Fabrice ;

Vinai, Raffaele ;

Harper, Anna B. ;

Walker, Pete .

SUSTAINABLE MATERIALS AND TECHNOLOGIES, 2021, 28

[10] Mechanical, thermal, hygroscopic and acoustic properties of bio-aggregates - lime and alkali - activated insulating composite materials: A review of current status and prospects for miscanthus as an innovative resource in the South West of England [J].

Ntimugura, Fabrice ;

Vinai, Raffaele ;

Harper, Anna ;

Walker, Pete .

SUSTAINABLE MATERIALS AND TECHNOLOGIES, 2020, 26

← 1 2 →