Preparation, characterization and reaction kinetics of green cement: Ecuadorian natural mordenite-based geopolymers

被引：25

作者：

Baykara, Haci ^{[1
,2
]}

Cornejo, Mauricio H. ^{[1
,2
]}

Murillo, Roberto ^{[1
]}

Gavilanes, Andrea ^{[1
]}

Paredes, Cecilia ^{[1
]}

Elsen, Jan ^{[3
]}

机构：

[1] ESPOL, Escuela Super Politecn Litoral, Fac Ingn Mecan & Ciencias Prod, Campus Gustavo Galindo Km 30-5 Via Perimetral, Guayaquil, Ecuador

[2] ESPOL, Ctr Nanotechnol Res & Dev CIDNA, Km 30-5 Via Perimetral,Campus Gustavo Galindo, Guayaquil, Ecuador

[3] Katholieke Univ Leuven, Fac Sci, Dept Earth & Environm Sci, Louvain, Belgium

来源：

MATERIALS AND STRUCTURES | 2017年 / 50卷 / 03期

关键词：

Mordenite; Compressive strength; Reaction kinetics; Geopolymers; ALKALI-ACTIVATED MATERIALS; X-RAY-DIFFRACTOMETRY; ZEOLITE; METAKAOLIN; MICROSTRUCTURE; POLYMERS; POZZOLAN;

D O I：

10.1617/s11527-017-1057-z

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study was carried out to develop geopolymers derived from mordenite-rich tuffs. First the synthesis of mordenite-based geopolymer was explored through the mix design of three chemical reagents: NaOH, Na4Si5O12, and Ca(OH)(2) and varying curing temperature. All the types of synthesized geopolymers were characterized by FT-IR spectroscopy, quantitative X-ray diffraction, SEM-EDS, TGA-DSC, compressive strength. The best mix design and curing temperature by means of the highest compressive obtained after 24 h were found as NaOH: 10 M, Na4Si5O12/NaOH ratio: 0.5, Ca(OH)(2): 3% (w/w), and 60 degrees C, respectively, which showed values of compressive strength about 10 MPa. Then early age reaction kinetics was established using Avrami-Erofe'ev model. The carbonation, as side effect of reactive ingredient, was also observed during the experiment seemingly without causing any effect on mechanical properties of geopolymers.

引用

页数：12

共 31 条

[1]

[Anonymous], 2014, 13 RILEM, DOI 10.1007/978-94-007-7672-2

[2] Effect of adding mineral additives to alkali-activated natural pozzolan paste [J].

Bondar, Dali ;

Lynsdale, C. J. ;

Milestone, N. B. ;

Hassani, N. ;

Ramezanianpour, A. A. .

CONSTRUCTION AND BUILDING MATERIALS, 2011, 25 (06) :2906-2910

[3] The role of calcium in blended fly ash geopolymers [J].

Canfield, Gina M. ;

Eichler, Jeffery ;

Griffith, Kara ;

Hearn, John D. .

JOURNAL OF MATERIALS SCIENCE, 2014, 49 (17) :5922-5933

[4]

Habert G., 2016, RILEM TECH LETT, V1, P17, DOI [10.21809/rilemtechlett.2016.6, DOI 10.21809/RILEMTECHLETT.V1.6]

[5] Production of geopolymer concrete using natural pozzolan: A parametric study [J].

Haddad, Rami H. ;

Alshbuol, Odey .

CONSTRUCTION AND BUILDING MATERIALS, 2016, 114 :699-707

[6] Physico-chemical, mechanical, microstructure and durability characteristics of alkali activated Egyptian slag [J].

Heikal, Mohamed ;

Nassar, M. Y. ;

El-Sayed, G. ;

Ibrahim, S. M. .

CONSTRUCTION AND BUILDING MATERIALS, 2014, 69 :60-72

[7] Alkali-activated fly ash-based geopolymers with zeolite or bentonite as additives [J].

Hu Mingyu ;

Zhu Xiaomin ;

Long Fumei .

CEMENT & CONCRETE COMPOSITES, 2009, 31 (10) :762-768

[8]

Hu N, 2017, APPL CLAY SCI, V135, P236

[9] Microstructure and properties of fly ash-based geopolymeric material with 5A zeolite as a filler [J].

Huang, Yi ;

Han, Minfang ;

Yi, Ruanrong .

CONSTRUCTION AND BUILDING MATERIALS, 2012, 33 :84-89

[10]

Hui Mo B, 2014, APPL CLAY SCI, V99, P144

← 1 2 3 4 →