The effect of two types of modified Mg-Al hydrotalcites on reinforcement corrosion in cement mortar - Details

author：

Yang, Z. (Yang, Z..) ^[1] | Polder, R. (Polder, R..) ^[2] | Mol, J.M.C. (Mol, J.M.C..) ^[3] | Andrade, C. (Andrade, C..) ^[4]

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Scopus

Abstract：

Two　modified　Mg-Al　hydrotalcites　(MHTs),　(MHT-pAB　and　MHT-NO2)　were　incorporated　into　mortar　(with　different　w/c　ratios)　in　two　different　ways:　(1)　as　one　of　the　mixing　components　in　bulk　mortar;　(2)　as　part　of　cement　paste　coating　of　the　reinforcing　steel.　Accelerated　chloride　migration,　cyclic　wetting-drying　and　diffusion　tests　were　performed　to　investigate　their　effect　on　reinforcement　corrosion.　The　results　indicated　that　MHTs　could　be　promising　alternatives　for　preventing　chloride-induced　corrosion　when　an　appropriate　dosage　is　adopted　and　applied　in　a　proper　way,　particularly,　replacing　5%　mass　of　cement　by　MHT-pAB　in　bulk　mortar　or　as　a　coating　of　reinforcing　steel　(MHT-pAB/MHT-NO2　to　replace　20%　mass　of　cement).　The　effect　of　MHT-pAB　on　time-to-corrosion　initiation　(TTC)　of　reinforcing　steel　was　estimated　using　the　DuraCrete　model.　It　was　found　that　the　incorporation　of　5%　MHT-pAB　in　bulk　mortar　led　to　a　more　than　double　TTC　relative　to　reference　mortar　without　MHTs.　©　2017　Elsevier　Ltd

Keyword：

Chloride (D); Corrosion (C); Durability (C); Modified hydrotalcites; Mortar (E)

Community：

[ 1 ] [Yang, Z.]College of Civil Engineering, Fuzhou University, Xueyuan Road 2, University Town, Fuzhou, 350116, China
[ 2 ] [Yang, Z.]Department of Civil and Environmental Engineering, Washington State University, P.O. Box 642910, Pullman, WA 99164-2910, United States
[ 3 ] [Yang, Z.]Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, Delft, 2600 GA, Netherlands
[ 4 ] [Polder, R.]Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, Delft, 2600 GA, Netherlands
[ 5 ] [Polder, R.]TNO Structural Reliability, P.O. Box 49, Delft, 2600 AA, Netherlands
[ 6 ] [Mol, J.M.C.]Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, Delft, 2628 CD, Netherlands
[ 7 ] [Andrade, C.]Institute “Eduardo Torroja” of Construction Science, Spanish National Research Council (IETcc-CSIC), Serrano Galvache 4, Madrid, 28033, Spain

Reprint 's Address：

[Yang, Z.]College of Civil Engineering, Fuzhou University, Xueyuan Road 2, University Town, China

Email：

zhengxian.yang@wsu.edu

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Source ：

Cement and Concrete Research

ISSN： 0008-8846

Year： 2017

Volume： 100

Page： 186-202

5 . 4 3

JCR@2017

1 0 . 9 0 0

JCR@2023

ESI HC Threshold：306

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 41

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 3

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