Nature protection technologies

3.5.1. Production of the building materials

Part 3. ASH AND SLAG HANDLING

3.5. Use of ash and slag from power coals

3.5.1. Use of ash and slag from power industry in Russia

3.5.1.1. The Russian standards for using ash and slag from thermal power plants for production of the building materials

F.L. Kapustin, V.M. Ufimsev, Ural State Technical University–UPI named after the first President of the Russian Federation, B.N. Eltsin, Yekaterinburg, Russian Federation

 The basic standards regulating the demands to composition and properties of fly ash, slag and ash-and-slag mixtures from solid fuel burning at heat power plants and to use in manufacturing of construction materials and building of highways are observed. It is offered to deposit to introduce clarity into standards concerning slags composition extended trends and raising efficiency of their application in building industry.

Part 3. ASH AND SLAG HANDLING

3.5. Use of ash and slag from power coals

3.5.1. Beneficiation of ash and slag from power industry in Russia

3.5.1.2. Utilization of fly ash for manufacturing of new generation of building materials – artificial porous wood

V.V. Barahtenko, E.V. Zelinskaya, E.O. Kostyukova, Irkutsk State Technical University, Irkutsk, Russia

T.A. Merkulyeva, M.N. Samuseva, Closed JSC “Irkutskzoloprodukt”, Irkutsk, Russia

F.A. Shutov, F&D Innovative Composites Inc, Los Angeles, USA

It has been developed an industrial technology for production of a new generation of  building materials – Artificial Porous Wood based on the mixture of fly ash (the by-product of power plants) and plastics waste. The commercialization of the developed technology should considerable reduce the environmental burden on local Baikal-Irkutsk region by recycling of large amount of mineral and organic solid waste.

Part 3. ASH AND SLAG HANDLING

3.5. Use of ash and slag from power coals

3.5.1. Beneficiation of ash and slag from power industry in Russia

3.5.1.3. High strength Portland cement free cementitious mortar

S. Aydın, B. Baradan - Dokuz Eylül University, Izmir, Turkey 

The aim of this study is to product a fly ash based binder without Portland cement. Type C fly ash was activated by NaOH with different molar ratios and cured in three different curing conditions (standard, steam and autoclave). Flexural and compressive strength values of mixtures were compared with conventional Portland cement mortars. In the second stage of this study, mechanical properties of fly ash based binders were improved by using silica fume and ground granulated blast furnace slag. Test results showed that the low early strength of FA based geopolymer can be improved by slag replacement and high performance geopolymer mortars can be produced by autoclave curing. Incorporation of fly ash by 50% ground granulated blast furnace slag and 10% silica fume was significantly increased the mechanical properties of autoclaved mortars. Drying shrinkage and swelling of geopolymer mortars were similar to Portland cement mortar. Both steam curing methods were effective in terms of reducing drying shrinkage and swelling of geopolymer mortars.

Part 3. ASH AND SLAG HANDLING

3.5. Applications of ash and slag from power coals

3.5.1.4. Fly ash in cement and concrete composition

Z. Giergiczny, Silesian University of Technology, Gliwice, Poland

 Fly ash is a by product of hard or brown coal combustion process. Owing to the size of spherical particles (similarly to cement), its chemical and mineral composition as well as the activity, fly ash is widely used in cement and concrete production.

Properly used fly ash has a positive effect both on properties of concrete mixture and concrete itself. It allows the production of high-quality concrete in economical and ecological way. The addition of fly ash to cement (or concrete) composition indicates the reduction of cement clinker content, thus, lower CO2 emission and preservation of non-renewable natural resources.

Part 3. ASH AND SLAG HANDLING

3.5. Applications of ash and slag from power coals

3.5.1.5. The practice of utilization of fly ash from Reftinskaya TPP

V. Levchenko, The Industrial - Building Association Teplit Ltd, Ekaterinburg, Russia

 The main directions for the protection of the environment are a course on the introduction of non-waste technology and the use of secondary resources. The acute problem of nowadays is the utilization of industrial wastes, a significant proportion of those are ash and slag from solid fuels. At the same time ash and slag are environmentally friendly mineral products that can replace natural materials. To date, 1.5 billion tons of ash waste has been accumulated in ash dumps of Russian Power Plants. Dumps area reaches 28 hectares (comparable with the territory of Irkutsk, Krasnoyarsk). Only 8% (2.1 million tons) of the annual output of ash wastes are recycled and used. If this trend continues, by 2020 the volume of accumulated ash wastes exceeds 1.75 billion tons. Meanwhile, The Industrial - Building Association Teplit Ltd in practice, successfully implementing the processing of fly ash and produces on its base quality building materials.