Abstract

A total of 84 specimens were tested to study the effect of concrete strength on the mechanical properties of concrete reinforced with randomly distributed steel fibers. The concrete strengths investigated include 25 MPa for normal-strength (NSC), 50 MPa for medium-strength (MSC), and 69 MPa representing high-strength concrete (HSC). Fiber content ranges from 0 to 1.5% by volume of the concrete matrix. The influence of concrete strength on the compressive strength, splitting tensile strength, and modulus of rupture of steel fiber-reinforced concrete (FRC) is presented. Based on the limited number of specimens tested, it was concluded that HSC provides considerable improvement in compressive strength for fiber content of up to 1% compared to that of NSC and MSC. Also, modulus of rupture of NSFRC considerably improves due to fiber compared to those of MSFRC and HSFRC. Splitting tensile strength results do not indicate a clear dependency to concrete compressive strength.

Issue Section:
Research Papers
Keywords:
compressive strength, fiber-reinforced concrete, modulus of rupture, splitting tensile strength, concrete strength, steel fibers, tests

References

1.
ACI Committee 363
,
1984
, “
State of the Art Report on High Strength Concrete
,” ACI 363R-84,
American Concrete Institute
,
Detroit
, p. 48.
2.
ACI Committee 544
,
1982
, “
State of the Art Report of Fiber Reinforced Concrete
,”
Concrete International: Design & Construction
, Vol.
4
, No.
5
, May, pp.
9
-
30
.
3.
ACI Committee 544
,
1989
, “
Measurement of Properties of Fiber Reinforced Concrete
,” ACI 544.2R-89,
American Concrete Institute
,
Detroit
, 11 pp.
4.
Carrasguillo
,
R. L.
,
Nilson
,
A. H.
, and
Slate
,
F. O.
,
1987
, “
Properties of High-Strength Concrete Subject to Short-Term Loads
,”
ACI Journal
 0002-8061, Proceedings, Vol.
78
, No.
3
, May–June, pp.
171
-
178
.
5.
Johnston
,
C. D.
,
1974
, “
Steel Fiber Reinforced Mortar and Concrete-A Review of Mechanical Properties
,”
Fiber Reinforced Concrete
, SP-44,
American Concrete Institute
,
Detroit
, pp.
127
-
142
.
6.
Khaloo
,
A. R.
 and
Ahmad
,
S. H.
,
1988
, “
Behavior of Normal and High-Strength Concrete under Combined Compression-Shear Loading
,”
ACI Materials Journal
 0889-325X, Vol.
85
, No.
6
, Nov.–Dec pp.
551
-
559
.
7.
Naaman
,
A. E.
,
1985
, “
Fiber Reinforcement for Concrete
,”
Concrete International: Design & Construction
, Vol.
7
, No.
3
, March, pp.
21
-
25
.
8.
Naaman
,
A. E.
 and
Homrich
,
J. R.
,
1985
, “
Properties of High-Strength Fiber Reinforced Concrete
,”
High-Strength Concrete
, ACI SP-87,
American Concrete Institute
,
Detroit
, pp.
233
-
249
.
9.
Nilson
,
A. H.
,
1987
, “
Design Implications of Current Research on High-Strength Concrete
,”
High-Strength Concrete
, ACI SP-87,
American Concrete Institute
,
Detroit
, pp.
85
-
109
.
10.
Rama Krishnan
,
V.
,
Oberling
,
G.
, and
Tatnall
,
P.
,
1987
, “
Flexural Fatigue Strength of Steel Fiber Reinforced Concrete
,”
Fiber Reinforced Concrete Properties and Applications
, SP-105,
American Concrete Institute
,
Detroit
, pp.
225
-
245
.
11.
Rumualdi
,
J. P.
 and
Batson
,
G. B.
,
1980
, “
Mechanics of Crack Arrest in Concrete
,”
Journal of the Engineering Mechanics Division
 0044-7951, ASCE, Vol.
89
, No.
EM-5
, June, pp.
147
-
168
.
12.
Swamy
,
R. N.
,
1986
, “
Properties of High-Strength Concrete
,”
Cement, Concrete, and Aggregates
, CCAGDP, Vol.
8
, No.
1
, Summer, pp.
33
-
41
.
13.
Swamy
,
R. N.
,
1987
, “
High-Strength Concrete-Material Properties and Structural Behaviors
,”
High-Strength Concrete
, ACI SP-87,
American Concrete Institute
,
Detroit
, pp.
110
-
146
.
14.
Wafa
,
F. F.
 and
Ashour
,
S. A.
,
1992
, “
Mechanical Properties of High-Strength Fiber Reinforced Concrete
,”
ACI Materials Journal
 0889-325X, Vol.
89
, No.
5
, Sept.–Oct, pp.
449
-
455
.
15.
Williamson
,
G. R.
,
1974
, “
Effect of Steel Fibers on the Compressive Strength of Concrete
,”
Fiber Reinforced Concrete
, SP-44,
American Concrete Institute
,
Detroit
, pp.
195
-
207
.
This content is only available via PDF.
All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ASTM International.
You do not currently have access to this content.