A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of Aggregates and Microfillers on the Flexural Properties of Concrete
The aim of the research project has been to acquire the technological knowledge by which the flexural and tensional capacity of plain concrete can be improved. A flexural strength theory for concrete based on the elastic-plastic theory was derived. The problem of enhancing the flexural strength of concrete was transformed into the problem of increasing the modulus of elasticity of concrete. Concrete was modeled as a three-phase material consisting of aggregate, binder matrix, and transition zone phases. The transition zone between the binder matrix and the aggregate particulates was reasoned to be around the aggregate particles which had a diameter exceeding 75 micrometers. The modulus of elasticity of concrete was modeled by an improved law of mixtures in which an adhesion factor was introduced. The results of the derived theory were compared with the test results of concretes in which three different aggregates and mainly two microfillers types were used. The aggregate types were granite, gabbro, and bauxite. Most commonly used microfillers were quartz fillers and a finely-ground product called G-filler which is comprised of magnesite, talc, and quartz. Statistical analysis showed a very significant correlation between the test results and the results provided by the theory.
Effects of Aggregates and Microfillers on the Flexural Properties of Concrete
The aim of the research project has been to acquire the technological knowledge by which the flexural and tensional capacity of plain concrete can be improved. A flexural strength theory for concrete based on the elastic-plastic theory was derived. The problem of enhancing the flexural strength of concrete was transformed into the problem of increasing the modulus of elasticity of concrete. Concrete was modeled as a three-phase material consisting of aggregate, binder matrix, and transition zone phases. The transition zone between the binder matrix and the aggregate particulates was reasoned to be around the aggregate particles which had a diameter exceeding 75 micrometers. The modulus of elasticity of concrete was modeled by an improved law of mixtures in which an adhesion factor was introduced. The results of the derived theory were compared with the test results of concretes in which three different aggregates and mainly two microfillers types were used. The aggregate types were granite, gabbro, and bauxite. Most commonly used microfillers were quartz fillers and a finely-ground product called G-filler which is comprised of magnesite, talc, and quartz. Statistical analysis showed a very significant correlation between the test results and the results provided by the theory.
Effects of Aggregates and Microfillers on the Flexural Properties of Concrete
V. Penttala (author) / P. Hannonen (author) / M. Jaervinen (author) / J. Komonen (author)
1995
115 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Aggregate , Flexural strength , Concrete , Admixtures , Binders , Modulus of elasticity , X ray diffraction , Construction materials , Mathematical models , Plastic properties , Elastic properties , Microstructure , Fillers , Foreign technology , Microfillers
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