Use of alkali activated high-calcium fly ash binder for kaolin clay soil stabilisation: Physicochemical evolution

被引：58

作者：

Coudert, Elodie ^{[1
,2
,3
]}

Paris, Michael ^{[1
]}

Deneele, Dimitri ^{[1
,4
]}

Russo, Giacomo ^{[2
]}

Tarantino, Alessandro ^{[3
]}

机构：

[1] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France

[2] Univ Cassino & Southern Lazio, Dept Civil & Mech Engn, Via Gaetano di Biasio 43, I-03043 Cassino, FR, Italy

[3] Univ Strathclyde, Dept Civil & Environm Engn, 75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland

[4] IFSTTAR, GERS, EE, F-44344 Bouguenais, France

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 201卷

基金：

欧盟地平线“2020”;

关键词：

Soil stabilisation; Alkali activated material; Kaolin; High-calcium fly ash; C-S-H; LATERITIC SOIL; GEOPOLYMER; NMR; AL-27; SLAG;

D O I：

10.1016/j.conbuildmat.2018.12.188

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study addresses the use of alkali activated high-calcium fly ash-based binder to improve engineering characteristics of soft clay-rich soils as an alternative to common stabilisers. The physico-chemical reaction sequence has been investigated by considering the binder alone and the binder mixed with kaolin. An insight into the reactivity evidenced that calcium-containing phases derived from high-calcium fly ash represent the reactive phases and, hence, pozzolanic activity is the dominant process. New compounds are formed, thenardite Na2SO4 and an amorphous silicate consisting of chains combined with calcium probably incorporating three-dimensional four-fold aluminium environments. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：539 / 552

页数：14

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