International Concrete Abstracts Portal

International Concrete Abstracts Portal

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Showing 1-5 of 46 Abstracts search results

Document: 

SP149-45

Date: 

October 1, 1994

Author(s):

J. J. Schemmel, , M. L. Leming, and M. R. Hansen

Publication:

Symposium Papers

Volume:

149

Abstract:

A 4-year study, conducted by a consortium of three universities, on the use of high-performance concrete in highway applications was recently completed. A major goal of this research project was to determine if high-performance concrete mixes could be successfully produced in the field. In addition, an evaluation was to be made of the long-term performance of this concrete under field service conditions. Field installations were constructed in five states for this purpose. Paper provides potential users of high-performance concrete with general recommendations and guidelines for production and placement.

DOI:

10.14359/4294


Document: 

SP149-11

Date: 

October 1, 1994

Author(s):

D. Galeota, M. M. Giammetteo, and R. Marino

Publication:

Symposium Papers

Volume:

149

Abstract:

Results of an experimental study on the structural behavior of exterior beam-column joints made of high-strength concrete and subjected to large reversal loads are presented. Variables examined were the joint shear stress and the ratio of transverse reinforcement. Based on the experimental results, it was shown that properly designed and detailed high-strength reinforced beam-column joints display ductile hysteretic behavior.

DOI:

10.14359/4159


Document: 

SP149-12

Date: 

October 1, 1994

Author(s):

H. Manalip, M. Pinglot, and M. Lorrain

Publication:

Symposium Papers

Volume:

149

Abstract:

Although high-strength concrete (HSC) has a brittle behavior in the case of specimens subjected to axial compression, a quite different behavior is obtained in the case of reinforced or prestressed concrete members subjected to bending. In this paper, five tests of HSC beams subjected to pure bending are described and analyzed to quantify their ductility and to deduce the real strain-softening behavior of their compressed zones. Three cases are studied: reinforced concrete, prestressed concrete, and partially prestressed concrete. The comparison of the experimental ultimate deformations (such as plastic rotations, curvatures, deflections) with the calculated values show that the strain-softening of compressed concrete may occur after the peak stress and can be defined by a k' coefficient varying from 0 to 1. For the tested beams, it was found that the use of HSC instead of normal strength concrete (NSC) results in the doubling of the plastic rotation capacity, for reinforced or prestressed beams subjected to pure bending.

DOI:

10.14359/4162


Document: 

SP149-13

Date: 

October 1, 1994

Author(s):

M. Imama Vamdewalle, and F. Mortelmans

Publication:

Symposium Papers

Volume:

149

Abstract:

Sixteen very high strength concrete beams (3600 x 350 x 200 mm) with and without steel fibers were tested under different combinations of shear force and bending moment. The beams were singly reinforced and without shear (web) reinforcement. The cylinder compressive strength of concrete was about 110 MPa. The main variables in this program were: shear span/depth ratio (a/d), the steel fiber content (V f), and the percentage of the longitudinal flexural reinforcement ({rho}). The test results showed that, adding steel fibers to high-strength concrete increased the ultimate shear strength, increased the stiffness, reduced the deflection, and transformed the failure mode into a more ductile one. Based on the test results, two empirical expressions have been proposed to predict the shear strength of steel fiber high-strength concrete.

DOI:

10.14359/4164


Document: 

SP149-21

Date: 

October 1, 1994

Author(s):

N. A. Lloyd and B. V. Rangan

Publication:

Symposium Papers

Volume:

149

Abstract:

Presents the results obtained from tests on high-performance concrete columns. Twenty-four columns were tested. The test parameters included shape and size of cross section, longitudinal reinforcement ratio, load eccentricity, and concrete compressive strength. Analytical methods to predict the behavior and strength of columns are also presented. Good correlation between test and analytical results is found.

DOI:

10.14359/4167


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