Durability of concrete made with different water-reducing chemical admixtures in tidal environment

Tarek Uddin Mohammed, Hidenori Hamada

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A detailed investigation on concrete specimens (100 mm diameter and 200 mm height) made with different chemical admixtures was carried out after 10 years of tidal exposure. Chemical admixtures include an air-entraining admixture (AEA) (vinsol), a water-reducing admixture (WRA) (lingosulfonate group), various high-range water-reducing and air-entraining admixtures (HRWRAEAs) (naphthalene, melamine, polycarboxyl, and amino-sulfonate group), and a drying shrinkage-reducing admixture (glycol ether plus amino alcohol derivatives). The specimens were tested for compressive strength, Young's modulus of elasticity, carbonation depths, chloride ingress, pore size distribution, electrochemical and physical evaluation of a steel bar's corrosion in concrete, examination,of steel-concrete interfaces, and mineralogy of the mortar portions of concrete. The naphthalene group of chemical admixture shows the best performance against strength development and chloride ingress prevention in concrete. Contrarily, the polycarboxyl group shows the least performance. The special method of casting concrete causes the formation of a good steel-concrete interface that prevents the initiation of corrosion 'even for a chloride concentration of more than 2% of cement mass.

Original languageEnglish
Pages (from-to)194-202
Number of pages9
JournalACI Materials Journal
Volume100
Issue number3
Publication statusPublished - May 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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