Plant diversity and ecological potential of naturally colonizing vegetation for ecorestoration of fly ash disposal area

Pembuatan paving blok geopolimer dari limbah abu terbang batu bara (Fly Ash) di Kelurahan Pematang Kapau Tenayan Raya Pekanbaru

Unri Conference Series: Community Engagement ◽

10.31258/unricsce.1.223-227 ◽

2019 ◽

Vol 1 ◽

pp. 223-227

Author(s):

Aman Aman ◽

Amun Amri

Keyword(s):

Fly Ash ◽

Bottom Ash ◽

Disposal Area ◽

Ash Disposal

Penggunaan batubara sebagai bahan bakar PLTU Tenayan Raya Pekanbaru menghasilkan limbah berupa abu terbang (fly ash) dan abu endapan (bottom ash). Fly ash memiliki kandungan silika dan alumuina tinggi sehingga berpotensi sebagai pengganti semen. Fly ash yang dihasilkan sebagian tidak dimanfaatkan dan ditimbun di ash disposal area dan berpotensi untuk menimbulkan pencemaran air dan tanah. Semakin meningkatnya pemakaian batubara, maka beban lingkungan akan semakin berat dan perlu diantisipasi dengan mencari pemanfaatan secara optimal limbah fly ash batu bara tersebut. Berdasarkan uraian di atas telah dilakukan kegiatan pengabdian masyarakat di Kelurahan Pematang Kapau Kecamatan Tenayan Raya Pekanbaru berupa sosialisasi dan pelatihan pemanfaatan limbah fly ash sebagai bahan pembuatan paving blok geopolimer tanpa menggunakan semen portland yang selama ini dipakai dalam proses pembuatan paving blok dan material bangunan lainnya. Dari hasil kegiatan pelatihan di atas diperoleh paving blok geopolimer dengan spesifikasi bentuk persegi panjang dengan ukuran panjang 21 cm, lebar 10 cm dan tinggi 8 cm,warna abu-abu dan dari hasil uji diperoleh kuat tekan 40,87 MPa masuk standar SNI mutu A.

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Road Concrete Containing Coal Ashes of Thermal Power Stations Located in Krasnoyarsk

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.839.160 ◽

2020 ◽

Vol 839 ◽

pp. 160-165

Author(s):

Galina V. Vasilovskaya ◽

Maria L. Berseneva ◽

Alexandra A. Yakshina ◽

Vadim V. Servatinsky ◽

Igor Ya. Bogdanov

Keyword(s):

Fly Ash ◽

Calcium Oxide ◽

Thermal Power ◽

Free Calcium ◽

Power Station ◽

Disposal Area ◽

Power Stations ◽

Thermal Power Stations ◽

Concrete Mix ◽

Ash Disposal

The paper reports on outcomes of research into a road concrete containing coal ash powders of thermal power stations located in Krasnoyarsk. The study was focused on characteristics of a fly ash, and ash taken in an ash-disposal area of Krasnoyarsk Thermal Power Station 1, as well as ash of Beryozovskaya GRES. To compare characteristics a standard limestone powder was used. Physical and mechanical characteristics, chemical and mineral composition of these powders were analyzed. Mineral powders differed in a concentration of free calcium oxide (СаОfr.). Samples of a fine-grained road concrete were composed and prepared using materials above. Physical and mechanical properties of formed road concrete samples were tested. A coefficient K was introduced to assess the relation between key characteristics of a road concrete mix and concentration of free calcium oxide, furthermore, it considers a percentage of СаОfr. in ash (m) and percentage of this ash in a road concrete (n), i.e. К= m·n. It has been established a coefficient К ranging 0 to 32 СаОfr. has no significant effect on characteristics of a road concrete mix. A fly ash and ash taken in an ash-disposal area of Krasnoyarsk thermal power station 1 are recommended for the use in industry as a mineral powder in a road concrete mix. Additionally, ash taken in an ash-disposal area is to be dried and grinded, a maximal content of a fly ash in a road concrete mix is estimated to be 4% provided that a concentration of СаОfr. is less than 8%.

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A Review on Utilization of Fly- Ash and Pond-Ash as a Partial Replacement of Cement in Concrete Mix Design

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset196270 ◽

2018 ◽

pp. 413-418

Author(s):

Harshkumar Patel ◽

Yogesh Patel

Keyword(s):

Fly Ash ◽

Electricity Generation ◽

Power Plants ◽

Renewable Energy Sources ◽

Thermal Power ◽

Strength Test ◽

Partial Replacement ◽

Pond Ash ◽

Research Activities ◽

Ash Disposal

Now-a-days energy planners are aiming to increase the use of renewable energy sources and nuclear to meet the electricity generation. But till now coal-based power plants are the major source of electricity generation. Disadvantages of coal-based thermal power plants is disposal problem of fly ash and pond ash. It was earlier considered as a total waste and environmental hazard thus its use was limited, but now its useful properties have been known as raw material for various application in construction field. Fly ash from the thermal plants is available in large quantities in fine and coarse form. Fine fly ash is used in construction industry in some amount and coarse fly ash is subsequently disposed over land in slurry forms. In India around 180 MT fly is produced and only around 45% of that is being utilized in different sectors. Balance fly ash is being disposed over land. It needs one acre of land for ash disposal to produce 1MW electricity from coal. Fly ash and pond ash utilization helps to reduce the consumption of natural resources. The fly ash became available in coal based thermal power station in the year 1930 in USA. For its gainful utilization, scientist started research activities and in the year 1937, R.E. Davis and his associates at university of California published research details on use of fly ash in cement concrete. This research had laid foundation for its specification, testing & usages. This study reports the potential use of pond-ash and fly-ash as cement in concrete mixes. In this present study of concrete produced using fly ash, pond ash and OPC 53 grade will be carried. An attempt will be made to investigate characteristics of OPC concrete with combined fly ash and pond ash mixed concrete for Compressive Strength test, Split Tensile Strength test, Flexural Strength test and Durability tests. This paper deals with the review of literature for fly-ash and pond-ash as partial replacement of cement in concrete.

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