Cement production which is one of the most energy intensive industries plays a
significant role in emitting the greenhouse gases. Blended cement production by
supplementary cementitious materials such as fly ash, ground granulated blast
furnace slag and natural pozzolan is one of the smart approaches to decrease energy
and ecology related concerns about the production.
Fly ash has been used as a substance to produce blended cements for years, but
bottom ash, its coarser counterpart, has not been utilized due to its lower pozzolanic
properties. This thesis study aims to evaluate the laboratory performance of blended
cements, which are produced both by fly ash and bottom ash.
Fly ash and bottom ash obtained from Seyitö / mer Power Plant were used to produce
blended cements in 10, 20, 30 and 40% by mass as clinker replacement materials.
One ordinary portland cement and eight blended cements were produced in the
laboratory. Portland cement was ground 120 min to have a Blaine value of 3500± / 100
cm2/g. This duration was kept constant in the production of bottom ash cements. Fly
ash cements were produced by blending of laboratory produced portland cement and
fly ash. Then, 2, 7, 28 and 90 day compressive strengths, normal consistencies,
soundness and time of settings of cements were determined.
It was found that blended fly ash and bottom ash cements gave comparable strength
results at 28 day curing age for 10% and 20% replacement. Properties of blended
cements were observed to meet the requirements specified by Turkish and American
standards.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12612504/index.pdf |
| Date | 01 September 2010 |
| Creators | Kaya, Ayse Idil |
| Contributors | Yaman, Ismail Ozgur |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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