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International Concrete Abstracts Portal

Showing 1-5 of 17 Abstracts search results

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: 

SP104-01

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: 

SP104-16

Date: 

October 1, 1987

Author(s):

Richard F. Stratfull

Publication:

Symposium Papers

Volume:

104

Abstract:

The results of approximately 30 years of pioneering efforts in the design, installation, and maintenance of cathodic protection to reinforced concrete bridge structures are reported. Some of the more important elements in testing and reasons for the perfo

DOI:

10.14359/1669

Document: 

SP104-12

Date: 

October 1, 1987

Author(s):

Luc R. Taerwe

Publication:

Symposium Papers

Volume:

104

Abstract:

Usually it is assumed that consecutive concrete strength values are independent. However, the analysis of five extensive concrete strength records, with a number of observations ranging between 534 and 1786, reveals that significant serial correlation is

DOI:

10.14359/1618

Document: 

SP104-09

Date: 

October 1, 1987

Author(s):

M. Maage

Publication:

Symposium Papers

Volume:

104

Abstract:

The use of high-strength concrete has been growing in Norway in the last 15 to 20 years. The paper gives a summary of this development, discusses the most important factors that influence strength, and provides examples of field application. Requirements

DOI:

10.14359/1634

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