Development of inorganic polymer by alkali-activation of untreated kaolinitic clay: Reaction stoichiometry, strength and dimensional stability

被引：39

作者：

Muayad, Esaifan ^{[1
]}

Hubert, Rahier ^{[2
]}

Ahmed, Barhoum ^{[2
]}

Hani, Khoury ^{[3
]}

Mohammed, Hourani ^{[4
]}

Jan, Wastiels ^{[1
]}

机构：

[1] Vrije Univ Brussel, Dept Mech Mat & Construct, Brussels, Belgium

[2] Vrije Univ Brussel, Dept Phys Chem & Polymer Sci, Brussels, Belgium

[3] Univ Jordan, Dept Geol, Amman, Jordan

[4] Univ Jordan, Dept Chem, Amman, Jordan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 91卷

关键词：

Inorganic polymer; Geopolymer; Kaolinite; Alkali-activation; Sodium hydroxide; Reaction stoichiometry; Compressive strength; TEMPERATURE; HYDRATION; NA;

D O I：

10.1016/j.conbuildmat.2015.04.034

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An environmental friendly building material was developed by alkali-activation of untreated kaolinitic clay using sodium hydroxide. The reaction was studied using differential scanning calorimetry. The chemical structure of the produced inorganic polymer was deduced from infrared spectroscopy, X-ray powder diffraction, thermogravimetric analysis, and scanning electron microscopy to be the tetrahydrate phase of hydroxysodalite with a Na/Al ratio of 4/3. Its strength and stability were evaluated in terms of compressive strength under dry and saturated conditions using different ratios of mixing water and NaOH. The compressive strength of dry samples ranges between 45 and 50 MPa. The wet samples after soaking in water show a strength between 20 and 25 MPa, and the wet samples after alternating cycles of drying and wetting also show a strength of 20-25 MPa. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：251 / 259

页数：9