Strength and Microstructural Analysis of Geopolymer Prepared with Recycled Geopolymer Powder

被引：19

作者：

Wang Xinjie ^{[1
]}

Yang Wei ^{[1
]}

Liu Hui ^{[1
]}

Zhu Pinghua ^{[1
]}

Zong Ningwen ^{[1
]}

Feng Jincai ^{[1
]}

机构：

[1] Changzhou Univ, Dept Civil Engn, Changzhou 213164, Peoples R China

来源：

JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2021年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

recycled geopolymer powder; geopolymer; substitution rates; mechanical properties; microstructure; ASH-BASED GEOPOLYMER; METAKAOLIN GEOPOLYMERS; COMPRESSIVE STRENGTH; CEMENT; CALCINATION; TECHNOLOGY; KAOLINITE; MORTAR; BINDER;

D O I：

10.1007/s11595-021-2428-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strength and microstructural analysis of recycled geopolymer are presented in this paper. Five kinds of geopolymers containing 0%, 20%, 50%, 80% and 100 % of recycled geopolymer powder were prepared using metakaolin as the source material. The alkali activator solution was a mixture of sodium silicate (Na2SiO3) and 12 M sodium hydroxide (NaOH). The change laws of compressive and flexural strength of recycled geopolymer specimens were investigated. And the microscopic characteristics were carried out by SEM, XRD and FTIR to observe the internal morphology and analyze changes in components of recycled geopolymers at different substitution rates. The results show that, with the increase of substitution rate of recycled geopolymer powder, the mechanical properties of recycled geopolymers degenerate and the looser structure are formed. When the substitution rate is less than 50%, the recycled geopolymer specimen meets the use requirements of heavy traffic load class. And the specimen with 80% of substitution rate satisfies the requirements of plastering mortar.

引用

页码：439 / 445

页数：7

共 39 条

[1] Production of geopolymeric binder from blended waste concrete powder and fly ash [J].

Ahmari, Saeed ;

Ren, Xin ;

Toufigh, Vahab ;

Zhang, Lianyang .

CONSTRUCTION AND BUILDING MATERIALS, 2012, 35 :718-729

[2] Synthesis and characterisation of materials based on inorganic polymers of alumina and silica: sodium polysialate polymers [J].

Barbosa, VFF ;

MacKenzie, KJD ;

Thaumaturgo, C .

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 2000, 2 (04) :309-317

[3] Kaolinite and smectite dissolution rate in high molar KOH solutions at 35° and 80°C [J].

Bauer, A ;

Berger, G .

APPLIED GEOCHEMISTRY, 1998, 13 (07) :905-916

[4] Evolution of binder structure in sodium silicate-activated slag-metakaolin blends [J].

Bernal, Susan A. ;

Provis, John L. ;

Rose, Volker ;

Mejia de Gutierrez, Ruby .

CEMENT & CONCRETE COMPOSITES, 2011, 33 (01) :46-54

[5]

China Building Industry Press, 2019, 500812019 GBT CHIN B

[6]

China Building Industry Press, 2011, JGJT2202011

[7]

China Communications Publishing House, 2011, D402011 JTG

[8] Construction and demolition waste in geopolymer concrete technology: a review [J].

Dadsetan, Sina ;

Siad, Hocine ;

Lachemi, Mohamed ;

Sahmaran, Mustafa .

MAGAZINE OF CONCRETE RESEARCH, 2019, 71 (23) :1232-1252

[9] Recycling of geopolymer waste: Influence on geopolymer formation and mechanical properties [J].

Gharzouni, A. ;

Vidal, L. ;

Essaidi, N. ;

Joussein, E. ;

Rossignol, S. .

MATERIALS & DESIGN, 2016, 94 :221-229

[10] The effect of curing on the properties of metakaolin and fly ash-based geopolymer paste [J].

Gorhan, Gokhan ;

Aslaner, Ridvan ;

Sinik, Osman .

COMPOSITES PART B-ENGINEERING, 2016, 97 :329-335

← 1 2 3 4 →