Influence of different sized fractions of a fly ash on workability of mortars

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(93)90045-B· OSTI ID:6300938

Mora, E P; Paya, J; Monzo, J ^[1]

---

1. Univ. Politecnica de Valencia (Spain). Departamento de Ingenieria de la Construccion

The study of fly ash as a replacement to mortar workability using a flow table is presented. Flow table spread (FTS) values were measured and correlations among fly ash replacing percentages, water volumes and granulometric distributions of fly ashes have been established. Linear relationships between FFS values and water volumes were obtained in the 200-225 ml water range (0.5 water/cement+fly ash ratio, 3.0 natural sand/cement + fly ash ratio). An increase of water volume implies greater FTS values. Original fly ash was separated in four fractions with different granulometric distributions. FTS values increase as do specific surface, and FTS values decrease as mean diameter of fly ash increase. For the finest fraction, the lubricant effect was counteracted by water adsorption on fly ash particles surfaces. The shape distribution curves of fly ashes (original and their fractions) has an important influence on workability.

• OSTI ID: 6300938
• Journal Information: Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Journal Issue: 4 Vol. 23:4; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
AEROSOL WASTES
ASHES
COMBUSTION PRODUCTS
CONCENTRATION RATIO
CORRELATIONS
DISTRIBUTION
FLY ASH
HYDROGEN COMPOUNDS
MORTARS
OXYGEN COMPOUNDS
PARTICLE SIZE
RESIDUES
RHEOLOGY
SIZE
VOLUME
WASTE PRODUCT UTILIZATION
WASTES
WATER