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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.

International Concrete Abstracts Portal

Showing 1-5 of 17 Abstracts search results

Document: 

SP104-01

Date: 

October 1, 1987

Author(s):

Erbest K. Schrader

Publication:

Symposium Papers

Volume:

104

Abstract:

ACI and ASTM standards require an overdesign factor to be added to the design strength to account for variability in the mix. A high variability necessitates an average strength considerably higher than the design strength. There are two key problems wit

DOI:

10.14359/1694


Document: 

SP104-06

Date: 

October 1, 1987

Author(s):

Terence C. Holland and Mark D. Luther

Publication:

Symposium Papers

Volume:

104

Abstract:

The use of silica fume in concrete has attracted a great deal of interest in the past several years. For those individuals not directly involved with silica fume, it may appear that the interest has all been from a research point of view. This is not corr

DOI:

10.14359/1630


Document: 

SP104-05

Date: 

October 1, 1987

Author(s):

C. Vipulanandan and N. Dharmarajan

Publication:

Symposium Papers

Volume:

104

Abstract:

The influence of a silane coupling agent on the mechanical properties of polyester polymer concrete with and without glass fiber reinforcement has been investigated. The silane was incorporated into the polymer concrete systems either by pretreating the aggregates and fibers or by directly adding it into the resin (integral addition method). The flexural properties of polyester polymer and polymer concrete were studied in four-point bending (third point loading) at room temperature. The results indicate that the silane treated aggregate systems increase in flexural strength by more than 50 percent when compared to the untreated systems. The increase in strength is also dependent on the amount of polymer in the polymer concrete. At equivalent loading levels of silane, superior flexural properties were obtained with the pretreatment method than with the integral addition method. The improvement in strength due to the silane coupling agent is explained in terms of chemical interaction between the polymeric matrix and filler. Addition of glass fibers enhances the strength, stiffness and toughness of polyester polymer concrete, and silane treatment of glass fibers helps to further enhance these properties. Behavior models are proposed to predict the enhanced flexural strength of polyester polymer concrete due to pretreatment, integral addition and fiber reinforcement.

DOI:

10.14359/10012


Document: 

SP104-02

Date: 

October 1, 1987

Author(s):

David Darwin

Publication:

Symposium Papers

Volume:

104

Abstract:

Construction methods and concrete properties affect the bond strength between concrete and reinforcing steel. Research on the effects of concrete slump, consolidation practice, bar position, concrete cover, and bar spacing is summarized. The research show

DOI:

10.14359/1718


Document: 

SP104-14

Date: 

October 1, 1987

Author(s):

John H. Lawder and Robert F. Adams

Publication:

Symposium Papers

Volume:

104

Abstract:

The organization and procedures used in the quality production of about 8 million cubic yards of concrete of all kinds for the California Water Project are described. These included design aspects, specifications, the concrete laboratory, and construction

DOI:

10.14359/1733


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