Wall Panels From Air-Entrained Ash Slag Concrete

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Title: Wall Panels From Air-Entrained Ash Slag Concrete

Author(s): S. I. Pavlenko

Publication: Special Publication

Volume: 171

Issue:

Appears on pages(s): 309-324

Keywords: Admixtures; air-entrainment; blending; compressive strength; concretes; slags; walls.

Date: 8/1/1997

Abstract:
The department of civil enginering of the Siberian State Academy for Mining and Metallurgy (SSAMM) together with Tom-Usinsk Precast Works have developed compositions and technology for producing a lightweight concrete based on ash and slag from Tom-Usinsk power plant. The concrete can be used for external wall panels as a replacement for daydite concrete. The ash slag blend from hydrodumps of the power plant contains 33% ash, 52% slag sand with a particle size of 0.14 to 5 mm and 15% slag with a particle size of 5 to 10 mm. The blend meets the requirements of Russia Standard 25592-91 for use in concretes as an aggregate. Compressive strength of the concrete ranged from 5 to 10 MPa depending on the degree of air-entrainment and the function of panels. Average density of the concrete mixture was in the range of 1070 to 1150 kg/m3 before placing and 1100 to 1200 kg/m3 after placing, compacting and heat treatment, the coefficient of heat conductivity of the light-weight concrete was in the range of 180 to 250 W/m oC depending on average density and strength. The thickness of wall panels produced from this concrete could be reduced to 400 mm with out any warm coating. The concrete developed has-been patented and tested at the Tom-Usinsk reinforced concrete works. The cost of 1 m3 of external wall panels produced from the concrete is 30% lower than that of panels made from claydite concrete.