Process Technology and Properties of Super-High-Strength Concrete Made by Polymer Impregnation of Silica-Fume Concrete

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Title: Process Technology and Properties of Super-High-Strength Concrete Made by Polymer Impregnation of Silica-Fume Concrete

Author(s): Y. Ohama and K. Demura

Publication: Special Publication

Volume: 91

Issue:

Appears on pages(s): 1171-1184

Keywords: autoclaving; bauxite; compressive strength; high-strength concretes; impregnating; methyl methacrylate; polymerization; porosity; silica; voids; water-reducing agents.

Date: 2/1/1986

Abstract:
This paper deals with a basic investigation of the process technology and properties of superhigh-strength concrete which is made by applying a polymer impregnation technique to silica fume concrete. The main purpose of this investigation is to find appropriate process conditions for developing the superhigh-strength concrete. Silica fume concrete is prepared using fine aggregates such as river sand and calcined bauxite and polyalkylaryl sulfonate-type water-reducing agent, and cured in an autoclave. The cured silica fume concrete is dried at various temperatures, and impregnated with polymethyl methacrylate by thermal polymerization in hot water. The strength properties and pore size distribution of the superhigh-strength concrete and the silica fume concrete are tested. The effects of drying temperature and pore size distribution of the silica fume concrete on the compressive strength of the superhigh-strength concrete are discussed. It is concluded from the test results that the superhigh-strength concrete having a compressive strength of 225 to 255 MPa is obtained by the above process.