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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 39 Abstracts search results

Document: 

SP121

Date: 

November 1, 1990

Author(s):

Weston T. Hester

Publication:

Symposium Papers

Volume:

121

Abstract:

SP-121 The Second International Symposium on the Utilization of High Strength Concrete was held in Berkeley, CA, May 1990. A substantial amount of research work and project construction with high strength concrete was completed since the last Symposium. Recent findings were presented and discussed.

DOI:

10.14359/14154

Document: 

SP121-30

Date: 

November 1, 1990

Author(s):

George c. Hoff

Publication:

Symposium Papers

Volume:

121

Abstract:

Briefly reviews five joint industry-research programs pertaining to offshore concrete structures. These programs were sponsored by the oil and gas industry and related construction industries. These studies, conducted in both North America and Norway, included the use of high-strength, lightweight aggregate concretes in both material and structural evaluations. Selected characteristics of the high-strength, lightweight aggregate concretes used in these studies (such as ductility in reinforced concrete elements, punching shear behavior, and fatigue characteristics) are summarized. Future research needs are discussed.

DOI:

10.14359/3768

Document: 

SP121-32

Date: 

November 1, 1990

Author(s):

Min-Hong Zhang and Odd E. GjorvI

Publication:

Symposium Papers

Volume:

121

Abstract:

Pore structure, density, and strenght may vary within a wide range for different types of lightweight aggregate. Hence, not all types of lightweight aggregate are suitable for production of high-strength concrete. In the present work, the significance of various lightweight aggregates on the concrete strenght and density was studied. Twenty-eight-day compressive strengths up to 102 MPa, corresponding to a density of 1865 kg/m3, were obtained. The type of lightweight aggregate appears to be the primary factor controlling both the density and the strength. For high-strength lightweight concrete, it is difficult to predict the 28-day strengths from early strengths because of the influence of the aggregate.

DOI:

10.14359/3778

Document: 

SP121-37

Date: 

November 1, 1990

Author(s):

S. Helland

Publication:

Symposium Papers

Volume:

121

Abstract:

In Norway, almost every car is equipped with tires that have small steel studs to improve the traction between the tire and the road for driver control during the winter season. These studded tires have an enormous wearing effect on ordinary asphalt pavement. Roads with the heaviest traffic near the major towns need to be resurfaced at intervals of 1 to 2 years. To improve the abrasion resistance, application of high-strength concrete instead of asphalt has been started. The national Norwegian cement producer has performed a large-scale investigation to determine the relation between concrete composition and abrasion resistance. The results prove that a 100 MPa concrete might approach the same properties as massive granite. The paper describes a number of projects performed by an independent company, where this high-quality material has been utilized in practical construction.

DOI:

10.14359/3793

Document: 

SP121-15

Date: 

November 1, 1990

Author(s):

B. J. Addis and M. G. Alexander

Publication:

Symposium Papers

Volume:

121

Abstract:

Discusses the need and requirements for a method of proportioning high-strength concrete mixes. The development of the method, which is based on a well-established method used for conventional concrete, is described. Design charts are given for various stone sizes, and an example of such a chart is illustrated. Because the method is based on easily determined aggregate properties, it is suitable for any type of aggregate: crushed or naturally occurring stone and sand, and graded or single-sized stone.

DOI:

10.14359/2507

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