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Titolo:
MICROSTRUCTURAL AND MECHANICAL EFFECTS OF LATEX, METHYLCELLULOSE, ANDSILICA FUME ON CARBON-FIBER-REINFORCED CEMENT
Autore:
CHEN PW; FU XL; CHUNG DDL;
Indirizzi:
SUNY BUFFALO,DEPT MECH & AEROSP ENGN BUFFALO NY 14260 NIAGARA MOHAWK POWER CORP SYRACUSE NY 00000 SUNY BUFFALO,COMPOSITE MAT RES LAB BUFFALO NY 14260
Titolo Testata:
ACI materials journal
fascicolo: 2, volume: 94, anno: 1997,
pagine: 147 - 155
SICI:
0889-325X(1997)94:2<147:MAMEOL>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
MORTAR;
Keywords:
CARBON; CEMENTS; CONCRETES; FLEXURAL STRENGTH; LATEX (PLASTIC); SILICA FUME; VOIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
P.W. Chen et al., "MICROSTRUCTURAL AND MECHANICAL EFFECTS OF LATEX, METHYLCELLULOSE, ANDSILICA FUME ON CARBON-FIBER-REINFORCED CEMENT", ACI materials journal, 94(2), 1997, pp. 147-155

Abstract

The effect of methylcellulose, silica fume, and latex on the degree of dispersion of short carbon fibers in cement paste (with water-reducing agent in an amount varying from 0 to 3 percent by weight of cement)was assessed. This degree, as indicated by the ratio of the measured volume of electrical conductivity to the calculated value, and the effectiveness of the fibers in enhancing the tensile/flexural properties attained by using methylcellulose and silica fume were higher than those attained by using methylcellulose alone or latex. Methylcellulose was superior to latex in giving a high degree of fiber dispersion at fiber volume fractions <1 percent, as measured by this technique, but latex resulted in superior tensile-flexural properties and lower contentand size of air voids than methylcellulose. With the fiber content fixed at 0.53 vol. percent, the degree of fiber dispersion, as measured by this technique, decreased with increasing latex-cement ratio from 0.05 to 0.30, while the void content attained a minimum at an intermediate latex-cement ratio of 0.15. As a result of the former, the flexural toughness decreased monotonically with increasing latex-cement ratio. As a result of the latter, the flexural strength attained a maximum at an intermediate latex-cement ratio of 0.15. In contrast, both flexural toughness and strength increased monotonically with increasing latex-cement ratio when fibers were absent.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 18:17:08