Fracture toughness of geopolymeric concretes reinforced with basalt fibers

被引：381

作者：

Dias, DP ^{[1
]}

Thaumaturgo, C ^{[1
]}

机构：

[1] IME, DEMM, BR-22290270 Rio De Janeiro, Brazil

来源：

CEMENT & CONCRETE COMPOSITES | 2005年 / 27卷 / 01期

关键词：

geopolymeric cement; fracture toughness; critical stress intensity factor; critical crack mouth opening displacement; notched beams; basalt fibers;

D O I：

10.1016/j.cemconcomp.2004.02.044

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The purpose of this work was to investigate the influence of the volumetric fraction of the fibers on the fracture toughness of geopolymeric cement concretes reinforced with basalt fibers. The values of fracture toughness, critical stress intensity factor and critical crack mouth opening displacement were measured on 18 notched beams tested by three-point bending. The a(0)/h (notch height/beam height) ratio was equal to 0.2 and the L-0/h (distance between the supports/beam height) ratio was equal to 3. According to the experimental results, geopolymeric concretes have better fracture properties than conventional Portland cement. They are also less sensitive to the presence of cracks. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：49 / 54

页数：6

共 21 条

[11]

Davidovits J., 1994, 1 INT C ALKALINE CEM, P131

[12]

DIAS DP, 2001, THESIS I MILITAR ENG

[13]

DIAS DP, 1999, 5 C BRAS CIM CBC ASS

[14]

*ESIS, 1992, PROC DET FRACT BEH M

[15] Stress intensity factor, compliance and CMOD for a general three-point-bend beam [J].

Guinea, GV ;

Pastor, JY ;

Planas, J ;

Elices, M .

INTERNATIONAL JOURNAL OF FRACTURE, 1998, 89 (02) :103-116

[16]

Hull D., 1981, INTRO COMPOSITE MAT, V1st

[17]

Shah S., 1995, FRACTURE MECH CONCRE

[18]

SILVA FJ, 2000, THESIS I MILITAR ENG

[19]

SOUZA AN, 1999, THESIS I MILITAR ENG

[20]

THOMAZ ECS, 2000, THESIS I MILITAR ENG

← 1 2 3 →