Details

Autor(en) / Beteiligte

• Khan, C N. Sadath Ali

Titel

The effect of temperature and salt contamination on corrosion of reinforcing steel in ordinary portland cement and blended cement concretes

Ort / Verlag

ProQuest Dissertations & Theses

Erscheinungsjahr

1993

Link zum Volltext

• ProQuest

Quelle

ProQuest Dissertations & Theses A&I

Beschreibungen/Notizen

• This study was conducted to investigate the effect of relatively high temperatures (25 to 70$\sp\circ$C) and chloride and sulfate contamination on the reinforcement corrosion in ordinary portland cement (OPC) and blended cement concretes. The effect of temperature and chloride and sulfate contamination on the compressive strength, porosity, electrical resistivity, alkalinity, water soluble chloride and sulfate concentration, and corrosion of reinforcing steel was evaluated. Results indicated that both the temperature and chloride-sulfate contamination influence the compressive strength of OPC and blended cement concrete specimens. The Cl$\sp-$/OH$\sp-$ ratio was observed to increase with the exposure temperature. The reinforcement corrosion activity, in both the OPC and blended cement concrete specimens was observed to be higher in specimens contaminated with both chloride and sulfate salts as against those contaminated with only chloride salts. At 70$\sp\circ$C exposure temperature, and chloride-sulfate contamination, the performance of all the blended cements investigated, was not better than that of plain cements. (Abstract shortened by UMI.)