Silica fume as porogent agent in geo-materials at low temperature

被引：186

作者：

Prud'hommea, E. ^{[1
]}

Michaud, P. ^{[1
]}

Joussein, E. ^{[2
]}

Peyratout, C. ^{[1
]}

Smith, A. ^{[1
]}

Arrii-Clacens, S. ^{[3
]}

Clacens, J. M. ^{[3
]}

Rossignol, S. ^{[1
]}

机构：

[1] GEMH ENSCI, F-87065 Limoges, France

[2] GRESE, EA 3040, F-87060 Limoges, France

[3] Univ Poitiers, LACCO, CNRS, UMR 6503, F-86022 Poitiers, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 07期

关键词：

Spectroscopy; X-ray methods; Thermal properties; Insulators; Silicate; Chemical properties; METAKAOLIN GEOPOLYMERS; INFRARED-SPECTROSCOPY; THERMAL-CONDUCTIVITY; FLY-ASH; PART; EVOLUTION; SPECTRA;

D O I：

10.1016/j.jeurceramsoc.2010.01.014

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The synthesis of geopolymers based on alkaline polysialate was achieved at low temperature (similar to 25-80 degrees C) by the alkaline activation of raw minerals and silica fume The materials were prepared from a solution containing dehydroxylated kaolinite and alkaline hydroxide pellets dissolved in potassium silicate Then the mixture was transferred to a polyethylene mold sealed with a top and placed in an oven at 70 degrees C for 24 h For all geopolymer materials, following dissolution of the raw materials, a polycondensation reaction was used to form the amorphous solid, which was studied by FTIR-ATR spectroscopy The in situ inorganic foam based on silica fume was synthesized from the in situ gaseous production of dihydrogen due to oxidation of free silicon (content in the silica fume) by water in alkaline medium, which was confirmed via TGA-Ms experiments. This foam has potential as an insulating material for applications in building materials since the thermal measurement has a value of 0 22 W m(-1) K-1 (C) 2010 Elsevier Ltd All rights reserved.

引用

页码：1641 / 1648

页数：8

共 28 条

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