AN EXPERIMENTAL STUDY ON THE MIX DESIGN OPTIMIZATION OF FLY ASH-BASED GEOPOLYMERS

被引：2

作者：

Arioz, Evren ^{[1
]}

Arioz, Omer ^{[2
]}

Kockar, O. Mete ^{[1
]}

机构：

[1] Eskisehir Tech Univ, Fac Engn, Dept Chem Engn, Eskisehir, Turkey

[2] Hasan Kalyoncu Univ, Fac Engn, Dept Civil Engn, TR-27410 Gaziantep, Turkey

来源：

CHEMICAL INDUSTRY & CHEMICAL ENGINEERING QUARTERLY | 2019年 / 25卷 / 03期

关键词：

alkali activation; geopolymers; fly ash; CONCRETE; COAL; TECHNOLOGY;

D O I：

10.2298/CICEQ181111004A

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Geopolymers are materials suitable for utilization in the construction industry due to their superior properties, such as high strength and good durability. The properties of geopolymers can be configured due to mix design and synthesis conditions. In this study, the mix designs providing the highest compressive strength were investigated. For this purpose the sodium hydroxide/sodium silicate ratios and alkali activator/fly ash ratios were differentiated in the geopolymer synthesis. Fly ash was used as raw material. Geopolymer samples were cured at 80 degrees C for 16 h and aged for 7 and 28 days in laboratory. The highest compressive strength was obtained as 27.36 MPa with alkali activator/fly ash ratio of 0.4 and sodium hydroxide/sodium silicate ratio of 1.0. The degree of reaction values were determined for all the geopolymer samples. Fourier Transform infrared spectroscopy (FTIR) was used for determining the chemical bonds in the structure. The spectrum of the samples revealed that more aluminosilicate gel formed for the sample providing the highest compressive strength.

引用

页码：259 / 265

页数：7

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