00676699

Component

http://onlinepubs.trb.org...trr/1994/1458/1458-016.pdf

https://scholar.google.co...rman&publication_year=1994

Results of a study to determine the influence of five different Class C fly ashes on inhibiting expansion due to alkali-silica reaction (ASR) are presented. Five different sands with varying degrees of ASR, combined with the five different fly ashes, were investigated. An accelerated test method (ASTM P214) was used to detect potentially deleterious expansion of mortar bars due to ASR. Replacement levels of 0, 10, 15, 20, 25, and 30% of cement by weight were investigated for all five fly ashes and for all five sands. Four of the fly ashes were effective in reducing to negligible levels ASR expansions. Varying amounts of fly ashes were needed for effective control of deleterious expansion. Some fly ashes at lower levels of blending (10 and 15%) actually increased expansion. One fly ash was not effective in inhibiting expansion as a result of ASR, even at 30% replacement. Fly ashes with high alkali contents (1.92%) were effective in inhibiting expansion related to ASR. Test results indicated that some Class C fly ashes at adequate replacement levels effectively reduced expansion to negligible levels, even in highly reactive sands.

This paper appears in Transportation Research Record No. 1458, Concrete Research. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01401262

English

p. 109-117

1994

Transportation Research Record

0309060656

Figures (3) ; References (22) ; Tables (5)

Accelerated tests; Alkali silica reactions; Concrete; Durability; Fly ash; Measures of effectiveness; Sand

Effectiveness

Highways; Materials; I32: Concrete

TRIS, TRB, ATRI

Apr 28 1995 12:00AM

• DEVELOPMENT OF CONCRETE DURABILITY SPECIFICATION AND RATINGS IN FLORIDA
• EFFECT OF CURING ON DURABILITY OF FLY ASH CONCRETE
• EFFECT OF NATURAL POZZOLAN ADDITION ON EXPANSIONS CAUSED BY ALKALI-SILICA REACTION
• EVALUATION AND COMPARISON OF THE PHYSICAL PROPERTIES OF FIBRILLATED POLYPROPYLENE FIBER-REINFORCED CONCRETES
• IMAGE ANALYSIS OF PORTLAND CEMENT CONCRETE AND ASPHALT CONCRETE PAVEMENTS USING SCANNING ELECTRON MICROSCOPE IMAGES (WITH DISCUSSION AND CLOSURE)
• INFLUENCE OF EARLY HEAT CURING ON PROPERTIES OF 100-MPA AIR-ENTRAINED CONCRETE
• INFLUENCE OF LOADING TYPE, SPECIMEN SIZE, AND FIBER CONTENT ON FLEXURAL TOUGHNESS OF FIBER-REINFORCED CONCRETE
• INTERPRETATION OF ACCELERATED TEST METHOD ASTM P214 TEST RESULTS
• MECHANICAL PROPERTIES OF LIGHTWEIGHT CONCRETE INCORPORATING RECYCLED SYNTHETIC WASTES
• NONDESTRUCTIVE IDENTIFICATION OF INTERNALLY DAMAGED AREAS OF CONCRETE BEAM USING THE SPECTRAL ANALYSIS OF SURFACE WAVES METHOD
• OPTIMIZATION OF ROLLER-COMPACTED CONCRETE FOR LOCAL APPLICATION
• PERFORMANCE CHARACTERISTICS OF MONOFILAMENT POLYPROPYLENE FIBER-REINFORCED CONCRETE
• PREDICTION OF CREEP EFFECT IN SEGMENTAL CONCRETE BRIDGE CONSTRUCTION
• RECYCLING CONTAMINATED SPENT BLASTING ABRASIVES IN PORTLAND CEMENT MORTARS
• STABILIZATION AND SOLIDIFICATION OF CONTAMINATED SOILS AND SLUDGES USING CEMENTITIOUS SYSTEMS: SELECTED CASE HISTORIES
• SYSTEM OPTIMIZATION OF FAILURE, CONSTITUTIVE MODELING, AND STRENGTHS OF CONCRETE AND OTHER GEOLOGICAL MATERIALS USING GENETIC ALGORITHM
• USE OF MATURITY AND PULSE VELOCITY TECHNIQUES TO PREDICT STRENGTH GAIN OF RAPID CONCRETE PAVEMENT REPAIRS DURING CURING PERIOD