Chemical durability of superabsorbent polymer (SAP) based geopolymer mortars (GPMs)

被引：40

作者：

Afridi, Suleman ^{[1
]}

Sikandar, Muhammad Ali ^{[1
]}

Waseem, Muhammad ^{[2
]}

Nasir, Hasan ^{[1
]}

Naseer, Amjad ^{[3
]}

机构：

[1] CECOS Univ IT & Emerging Sci, Dept Civil Engn, Peshawar, Pakistan

[2] Univ Peshawar, Natl Ctr Excellence Geol, Peshawar, Pakistan

[3] Univ Engn & Technol, Dept Civil Engn, Peshawar, Pakistan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 217卷

关键词：

Hydrogel; Chemical attack; Geopolymer; Superabsorbent polymer; Durability; ASH BASED GEOPOLYMER; FLY-ASH; MECHANICAL-PROPERTIES; THERMAL-BEHAVIOR; CONCRETE; SODIUM; PERFORMANCE; SULFATE; SILICA; WATER;

D O I：

10.1016/j.conbuildmat.2019.05.101

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigates the durability of superabsorbent polymer (SAP) based geopolymer mortars (GPMs) against acid, sulfate, and chloride attack. Nine mix formulations containing 0, 1, and 2% SAP content by weight of fly ash were prepared. All the samples were cured at 80 degrees C, followed by curing at room temperature for 24 h. The specimens were immersed in the chemical solutions of 5% hydrochloric acid (HCl), 5% sodium sulfate (Na2SO4), and 5% calcium chloride (CaCl2) for 180 days. Thereafter, the durability performance of GPMs was evaluated based on the change in weight and change in compressive strength of the specimens. Based on the results, it was deduced that SAP based GPMs were less vulnerable to chemical attack. Furthermore, deterioration effects were lower due to improved sorptivity and porosity values. The X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscope (SEM), and Energy Dispersion X-ray Spectroscopy (EDX) analyses revealed that the inclusion of SAP improves the chemical durability of GPMs. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：530 / 542

页数：13

共 82 条

[21]

[Anonymous], AAPP ATTI ACCAD PELO

[22]

[Anonymous], 2005, Development and Properties of Low-Calcium Fly Ash Based Geopolymer Concrete

[23] Effect of nanoclay on durability and mechanical properties of flax fabric reinforced geopolymer composites [J].

Assaedi, H. ;

Shaikh, F. U. A. ;

Low, I. M. .

JOURNAL OF ASIAN CERAMIC SOCIETIES, 2017, 5 (01) :62-70

[24] Durability of geopolymer materials in sodium and magnesium sulfate solutions [J].

Bakharev, T .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (06) :1233-1246

[25] Synthesis and thermal behaviour of potassium sialate geopolymers [J].

Barbosa, VFF ;

MacKenzie, KJD .

MATERIALS LETTERS, 2003, 57 (9-10) :1477-1482

[26] 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

[27] Thermal behaviour of inorganic geopolymers and composites derived from sodium polysialate [J].

Barbosa, VFF ;

MacKenzie, KJD .

MATERIALS RESEARCH BULLETIN, 2003, 38 (02) :319-331

[28] Impact of sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers [J].

Bascarevic, Zvezdana ;

Komljenovic, Miroslav ;

Miladinovic, Zoran ;

Nikolic, Violeta ;

Marjanovic, Natasa ;

Petrovic, Rada .

MATERIALS AND STRUCTURES, 2015, 48 (03) :683-697

[29]

Buchholz F.L., 1998, POLYM INT

[30] Effect of nano-silica on the chemical durability and mechanical performance of fly ash based geopolymer concrete [J].

Cevik, Abdulkadir ;

Alzeebaree, Radhwan ;

Humur, Ghassan ;

Nis, Anil ;

Gulsan, Mehmet Eren .

CERAMICS INTERNATIONAL, 2018, 44 (11) :12253-12264

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