You need JavaScript to view this

Fly-ash concrete. Strength and chloride penetration; Flyveaskebeton. Styrke og kloridindtraengning

Technical Report:

Abstract

Various characteristics of fly-ash concrete were investigated and clarified in relation to the physical and chemical influence fly ash has when it is mixed into concrete. Forms of corrosion in reinforced concrete constructions are described, especially with regard to the measurement of chloride penetration. On the basis of experiments on pressure strength, the strength-development of this form of concrete was examined. Mathematical models for calculating strength development were tested. Chloride penetration was investigated in test samples which had lain in salt water solutions for four years. On the basis of these tests, calculations were made on the prospective lifetime of concrete constructions wherein chloride penetration was found. Here stricter demands on the thickness of concrete covers exposed to aggressive environments are recommended. This would triple the lifetime of concrete constructions, it is claimed. A control of the measuring method for determining the extent of chloride penetration was carried out. The significance of heat cracks in concrete was examined in relation to corrosion connected to reinforcement. Some of the samples that had lain in salt water for more than four years showed no sign of corrosion of the iron used for reinforcing the concrete. But when they were subjected to a  More>>
Authors:
Publication Date:
Dec 01, 1991
Product Type:
Technical Report
Report Number:
DTH-LBM-TR-91-250
Reference Number:
SCA: 200200; PA: DK-92:001838; SN: 93000917927
Resource Relation:
Other Information: PBD: Dec 1991
Subject:
20 FOSSIL-FUELED POWER PLANTS; FLY ASH; REINFORCED CONCRETE; WASTE PRODUCT UTILIZATION; CHLORIDES; CORROSION; COMPRESSION STRENGTH; THERMAL FRACTURING; SERVICE LIFE; 200200; WASTE MANAGEMENT
OSTI ID:
10110782
Research Organizations:
Danmarks Tekniske Hoejskole, Lyngby (Denmark). Lab. for Bygningsmaterialer
Country of Origin:
Denmark
Language:
Danish
Other Identifying Numbers:
Other: ON: DE93752746; TRN: DK9201838
Availability:
OSTI; NTIS
Submitting Site:
DK
Size:
167 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Moeller, E B. Fly-ash concrete. Strength and chloride penetration; Flyveaskebeton. Styrke og kloridindtraengning. Denmark: N. p., 1991. Web.
Moeller, E B. Fly-ash concrete. Strength and chloride penetration; Flyveaskebeton. Styrke og kloridindtraengning. Denmark.
Moeller, E B. 1991. "Fly-ash concrete. Strength and chloride penetration; Flyveaskebeton. Styrke og kloridindtraengning." Denmark.
@misc{etde_10110782,
title = {Fly-ash concrete. Strength and chloride penetration; Flyveaskebeton. Styrke og kloridindtraengning}
author = {Moeller, E B}
abstractNote = {Various characteristics of fly-ash concrete were investigated and clarified in relation to the physical and chemical influence fly ash has when it is mixed into concrete. Forms of corrosion in reinforced concrete constructions are described, especially with regard to the measurement of chloride penetration. On the basis of experiments on pressure strength, the strength-development of this form of concrete was examined. Mathematical models for calculating strength development were tested. Chloride penetration was investigated in test samples which had lain in salt water solutions for four years. On the basis of these tests, calculations were made on the prospective lifetime of concrete constructions wherein chloride penetration was found. Here stricter demands on the thickness of concrete covers exposed to aggressive environments are recommended. This would triple the lifetime of concrete constructions, it is claimed. A control of the measuring method for determining the extent of chloride penetration was carried out. The significance of heat cracks in concrete was examined in relation to corrosion connected to reinforcement. Some of the samples that had lain in salt water for more than four years showed no sign of corrosion of the iron used for reinforcing the concrete. But when they were subjected to a temperature shock of 80 degrees centigrade, from hot to cold water, thermal cracks were induced on the surface of the samples. It was seen that the chloride had found a way through these cracks in towards the iron used for reinforcement. Measurement results are presented. (AB).}
place = {Denmark}
year = {1991}
month = {Dec}
}