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Paper Information

Title: 

EFFECT OF ALKALI-SILICA REACTION TOGETHER WITH CREEP ON THE BENDING REINFORCED CONCRETE BEAMS

Type: PAPER
Author(s): HAJIGHASEMALI SAEID,RAMEZANIANPOUR ALI AKBAR
 
 
 
Name of Seminar: INTERNATIONAL CONFERENCE ON COASTS, PORTS AND MARINE STRUCTURES (ICOPMAS) PORTS & MARITIME ORGANIZATION
Type of Seminar:  CONFERENCE
Sponsor:  PORTS AND MARITIME ORGANIZATION
Date:  2008Volume 8
 
 
Abstract: 

ALKALI SILICA REACTION IS THE REACTION BETWEEN ALKALI IN CEMENT AND CERTAIN FORMS OF SILICA IN AGGREGATES. THE REACTION PRODUCES GEL RESULTING IN CRACKING AND DISINTEGRATION OF CONCRETE.
A LABORATORY STUDY WAS CARRIED OUT TO INVESTIGATE THE EFFECT OF DELETERIOUS ASR EXPANSION ON THE STRUCTURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS. THE SPECIMENS WERE MADE WITH REACTIVE OR NON-REACTIVE AGGREGATES. ALL BEAMS HAD 100×150×1100 MM DIMENSIONS AND INTERNAL REINFORCEMENT. AFTER LOADING, SPECIMENS WERE KEPT UNDER LONG-TERM OBSERVATION AT 38OC AND 100 PERCENT RELATIVE HUMIDITY.
IT WAS QUITE CLEAR THAT THE BEAMS CONTAINING REACTIVE AGGREGATE SHOWED A SIGNIFICANT INCREASING STRAIN. ULTIMATE LOADS ARE REDUCED IN ASR AFFECTED BEAMS DUE TO LARGE IRREVERSIBLE STEEL STRAINS.

 
Keyword(s): ALKALI SILICA REACTION (ASR), EXPANSION, REINFORCED CONCRETE BEAMS, FLEXURAL STRENGTH
 
 
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