Chloride binding and mobility in sodium carbonate-activated slag pastes and mortars

被引：63

作者：

Ke, Xinyuan ^{[1
]}

Bernal, Susan A. ^{[1
]}

Hussein, Oday H. ^{[1
]}

Provis, John L. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Sci & Engn, Sir Robert Hadfield Bldg, Sheffield S1 3JD, S Yorkshire, England

来源：

MATERIALS AND STRUCTURES | 2017年 / 50卷 / 06期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

Sodium carbonate-activated slag; Layered double hydroxide; Chloride; Durability; Microstructure; LAYERED DOUBLE HYDROXIDES; BLAST-FURNACE SLAG; HYDRATION PRODUCTS; PORE STRUCTURE; FRIEDELS SALT; PHASE-TRANSITION; FLY-ASH; CEMENT; STRENGTH; ION;

D O I：

10.1617/s11527-017-1121-8

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study evaluates the chloride binding capacity and the migration of chloride in sodium carbonate-activated slag cements and mortars. The effect on chloride mobility and binding of adding a calcined layered double hydroxide (CLDH) to the binder mix was also assessed. Significantly improved durability characteristics can be achieved for sodium carbonate-activated slag mortars by the addition of small fractions of CLDH, as a consequence of a higher degree of reaction, higher chloride binding capacity, and the refined pore structures present in these modified materials, in comparison with alkali-activated cements produced without CLDH. The addition of CLDH enables the production of sodium carbonate-activated slag cements with notably reduced chloride ingress compared to silicate activated slag cements.

引用

页数：13

共 68 条

[1] Characterization of the α-β phase transition in Friedels salt (Ca2Al(OH)6Cl•2H2O) by variable-temperature 27Al MAS NMR spectroscopy [J].

Andersen, MD ;

Jakobsen, HJ ;

Skibsted, J .

JOURNAL OF PHYSICAL CHEMISTRY A, 2002, 106 (28) :6676-6682

[2] Testing and modelling chloride penetration into concrete [J].

Andrade, C. ;

Prieto, M. ;

Tanner, P. ;

Tavares, F. ;

d'Andrea, R. .

CONSTRUCTION AND BUILDING MATERIALS, 2013, 39 :9-18

[3] Chloride threshold level for corrosion of steel in concrete [J].

Ann, Ki Yong ;

Song, Ha-Won .

CORROSION SCIENCE, 2007, 49 (11) :4113-4133

[4]

[Anonymous], 1999, 492 NORDTES NT BUILD

[5] Effects of water-cement ratio and curing time on the critical pore width of hardened cement paste [J].

Atahan, Hakan Nuri ;

Oktar, Osman Nuri ;

Tasdemir, Mehmet Ali .

CONSTRUCTION AND BUILDING MATERIALS, 2009, 23 (03) :1196-1200

[6] Influence of activator on the strength and drying shrinkage of alkali-activated slag mortar [J].

Atis, Cengiz Duran ;

Bilim, Cahit ;

Celik, Oezlem ;

Karahan, Okan .

CONSTRUCTION AND BUILDING MATERIALS, 2009, 23 (01) :548-555

[7] The potential for using slags activated with near neutral salts as immobilisation matrices for nuclear wastes containing reactive metals [J].

Bai, Y. ;

Collier, N. C. ;

Milestone, N. B. ;

Yang, C. H. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 413 (03) :183-192

[8] Influence of slag chemistry on the hydration of alkali-activated blast-furnace slag - Part I: Effect of MgO [J].

Ben Haha, M. ;

Lothenbach, B. ;

Le Saout, G. ;

Winnefeld, F. .

CEMENT AND CONCRETE RESEARCH, 2011, 41 (09) :955-963

[9] Alkali-activated slag cements produced with a blended sodium carbonate/sodium silicate activator [J].

Bernal, Susan A. ;

San Nicolas, Rackel ;

van Deventer, Jannie S. J. ;

Provis, John L. .

ADVANCES IN CEMENT RESEARCH, 2016, 28 (04) :262-273

[10] Role of carbonates in the chemical evolution of sodium carbonate-activated slag binders [J].

Bernal, Susan A. ;

Provis, John L. ;

Myers, Rupert J. ;

San Nicolas, Rackel ;

van Deventer, Jannie S. J. .

MATERIALS AND STRUCTURES, 2015, 48 (03) :517-529

← 1 2 3 4 5 6 7 →