The Durability of Mortar Containing Alkali Activated Fly Ash-Based Lightweight Aggregate

被引：8
作者：
Risdanareni, Puput [1 ,2 ]
van den Heede, Philip [1 ]
Wang, Jianyun [3 ]
De Belie, Nele [1 ]
机构：
[1] Univ Ghent, Magnel Vandepitte Lab Struct Engn & Bldg Mat, Technologiepk Zwijnaarde 60, B-9052 Ghent, Belgium
[2] State Univ Malang, Dept Civil Engn, Fac Engn, Semarang St 5, Malang 65145, Indonesia
[3] Xi An Jiao Tong Univ, Dept Civil Engn, Xianning West Rd 28, Xian 710049, Peoples R China
来源：
MATERIALS | 2021年 / 14卷 / 13期
关键词：
fly ash; alkali activated lightweight aggregate; carbonation resistance; chloride migration; capillary water uptake; ITZ; C-S-H; INTERFACIAL TRANSITION ZONE; BOTTOM ASH; NANOSTRUCTURE; PELLETIZATION; ABSORPTION; BINDERS; CA/SI; RATIO;
D O I：
10.3390/ma14133741
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Beneficiating fly ash as valuable construction material such as artificial lightweight aggregate (LWA) could be an alternative solution to increase the utilization of the industrial by-product. However, generally, LWA is characterized by high porosity and a related high water absorption, which on the one hand allows production of lightweight mortar, but on the other hand can affect its performance. Thus, in this research, the durability performance of mortar composed with alkali-activated fly ash-based LWA, and commercial expanded clay (EC) LWA was investigated. The fly ash LWA was prepared in a pan granulator, with a 6-molar solution of NaOH mixed with Na2SiO3 in a Na2SiO3/NaOH weight ratio of 1.5 being used as activator (FA 6M LWA). The results revealed that mortar containing FA 6M LWA had equivalent mechanical strength with mortar containing EC LWA. The mortar containing FA 6M LWA had comparable capillary water uptake and chloride migration resistance with the reference and EC LWA mortar. Furthermore, the addition of FA 6M LWA was proven to enhance the carbonation resistance in the resulting mortar, due to the denser interfacial transition zone (ITZ) of mortar with LWA.
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页数：15
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共 33 条
[1]   Physical evidence of swelling as the cause of anomalous capillary water uptake by cementitious materials [J].
Alderete, N. M. ;
Villagran Zaccardi, Y. A. ;
De Belie, N. .
CEMENT AND CONCRETE RESEARCH, 2019, 120 :256-266
[2]   THE STUDY OF MICROSTRUCTURES OF POLY(VINYL ALCOHOL) BY NMR [J].
AMIYA, S ;
TSUCHIYA, S ;
QIAN, R ;
NAKAJIMA, A .
PURE AND APPLIED CHEMISTRY, 1990, 62 (11) :2139-2146
[3]   Utilization of fly ash by pelletization process;: theory, application areas and research results [J].
Baykal, G ;
Döven, AG .
RESOURCES CONSERVATION AND RECYCLING, 2000, 30 (01) :59-77
[4]   Influence of internal curing using lightweight aggregates on interfacial transition zone percolation and chloride ingress in mortars [J].
Bentz, Dale P. .
CEMENT & CONCRETE COMPOSITES, 2009, 31 (05) :285-289
[5]   Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation [J].
Bernal, Susan A. ;
Provis, John L. ;
Walkley, Brant ;
Nicolas, Rackel San ;
Gehman, John D. ;
Brice, David G. ;
Kilcullen, Adam R. ;
Duxson, Peter ;
van Deventer, Jannie S. J. .
CEMENT AND CONCRETE RESEARCH, 2013, 53 :127-144
[6]   Influence of cracking on the capillary absorption and carbonation of structural lightweight aggregate concrete [J].
Bogas, J. A. ;
Carrico, A. ;
Pontes, J. .
CEMENT & CONCRETE COMPOSITES, 2019, 104
[7]   Capillary absorption of structural lightweight aggregate concrete [J].
Bogas, J. Alexandre ;
Gomes, M. Gloria ;
Real, Sofia .
MATERIALS AND STRUCTURES, 2015, 48 (09) :2869-2883
[8]   Mortars with alkali-activated municipal solid waste incinerator bottom ash and fine recycled aggregates [J].
Casanova, S. ;
Silva, R. V. ;
de Brito, J. ;
Pereira, M. F. C. .
JOURNAL OF CLEANER PRODUCTION, 2021, 289
[9]   Properties of geopolymerised low-calcium bottom ash aggregate cured at ambient temperature [J].
Geetha, S. ;
Ramamurthy, K. .
CEMENT & CONCRETE COMPOSITES, 2013, 43 :20-30
[10]   Effects of fly ash properties on characteristics of cold-bonded fly ash lightweight aggregates [J].
Gesoglu, Mehmet ;
Ozturan, Turan ;
Guneyisi, Erhan .
CONSTRUCTION AND BUILDING MATERIALS, 2007, 21 (09) :1869-1878
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