Early Age Performance of Binary Fly Ash Portland Cement Blends

Date

2014-04-28

Author

Tangüler Bayramtan, Meltem
Akgül, Çağla

Metadata

Show full item record

Item Usage Stats

88
views

0
downloads

During the manufacturing of portland cement (PC), massive amounts of raw material and energy are consumed. Besides depletion of natural resources, the CO2 – a major contributor to the greenhouse effect and the global warming - emissions from PC manufacturing (~6% of the global CO2 emissions) is alarming. Supplementary cementititous materials (SCM) can be effectively used to partially replace PC in production of blended cements. These alternative cements are more sustainable when compared to ordinary PC with reduced raw material and energy demand and minimized CO2 emissions. Fly ash (FA) - a fine and highly amorphous aluminosilicate rich material - is the most important waste product of thermal power plants. FA is generated during the combustion of pulverized coal and collected from the power plant chimneys by electrostatic filters. The global production of FA is estimated to be 750 million tonnes annually whereas the global average of FA recycling is estimated to be about 25%. Cement and concrete industry is the leading construction industry in FA utilization. The wide range availably and pozzolanic potential of FA makes it one of the most common SCMs. In this work, two FA samples were blended with PC at two different FA-to-PC weight ratios: 20:80, and 60:40. A 0:100 control sample was also tested. The blended cements were mixed with water to initiate the hydration reactions. An isothermal calorimetry was used for the determination of the rate of hydration heat liberation of each blend for the first 7 days of hydration reactions. The flow diameter of the blended cement mortar were determined according to ASTM C 1437. Flexural and compressive strength tests on mortars were conducted on 2-day, 7-day and 28-day old samples. As increasing FA content, heat of hydration and also strength development decreased for early-age of blends.

Subject Keywords

Fly Ash, Waste Management, Coal, Sustainability, Portland Cement

URI

https://hdl.handle.net/11511/84561

Conference Name

Eurasia 2014 Waste Management Symposium, at İstanbul (28 - 30 Nisan 2014)

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

A Study on the utilization of waste cement - bonded wood particle board as a raw material and a secondary fuel in cement manufacturing Yılmaz, Mustafa; Tokyay, Mustafa; Öztürk, Abdullah; Department of Cement Engineering (2012) A considerable amount of waste is obtained as a result of edge-cutting operations during cement-bonded wood particle board (CBWPB) manufacturing. This waste material which basically contains wood chips and hydrated cement has to be disposed of and does not have any economical value. However, it can be burned in cement rotary kilns and may result in energy savings to a certain extent due to the presence of wood particles as a secondary fuel and since the hydrated cement may be decomposed and then reform clin...
Properties of alinite cement produced by using soda sludge Kesim, Asli Gunes; Tokyay, Mustafa; Yaman, İsmail Özgür; Öztürk, Abdullah (2013-04-01) A production route of alinite cement clinker using the waste material of the Solvay process of the soda industry as the main raw material was searched. Soda sludge (73.5 wt%), clay (26.3 wt%) and minor amounts of iron ore (0.2 wt%) were mixed to obtain a raw mix that is later burned at nine different burning schemes. Four different burning temperatures (1050, 1100, 1150 and 1200 degrees C) and three different burning durations (60, 90 and 180 min) were applied for clinkerisation. The clinkers obtained were ...
Utilization of GGBFS blended cement pastes in well cementing Alp, Barış; Yaman, İsmail Özgür; Akın, Serhat; Department of Cement Engineering (2012) In well cementing, the cement slurry is exposed to the conditions far different than those of ordinary Portland cement (PC) used in construction. After placement, hardened cement paste should preserve integrity and provide zonal isolation through the life of the well. American Petroleum Institute (API) Class G cement is the most common cement type used in various well conditions. Class G cement has a high degree of sulfate resistance which makes it more stable than PC when subjected to the compulsive well c...
Synthesis of alinite cement using soda solid waste Güneş, Aslı; Yaman, İsmail Özgür; Öztürk, Abdullah; Department of Cement Engineering (2010) This study is dedicated to give a production route for a kind of low energy cement called alinite cement using the waste material of soda industry as the main raw material. Soda solid waste, clay and minor amount of iron ore were mixed with certain quantities and burned at six different burning temperatures of 1050, 1100, 1150, 1200, 1350, and 1450 ºC. The resultant clinkers were investigated by mineralogical and chemical analysis. Mineralogical analyses were performed by X-Ray Diffraction (XRD) technique. ...
Effect of combining different cement clinkers and slag with controlled finenesses on mortar strength and heat of hydration Çelikkol Koçak, Tümay; Erdoğan, Sinan Turhan; Department of Civil Engineering (2013) Portland cement production is an energy consuming activity. Increasing efficiency in concrete production is one of the ways of reducing energy consumption. To improve the efficiency of the properties of both materials and concrete system, reduction of undesired effects (loss of strength, decrease in lifetime, etc.) is important. The main purpose of this study is to combine different Portland cement clinkers and blast furnace slag with different fineness to obtain a cement with a controlled grading, in order...

Citation Formats

M. Tangüler Bayramtan and Ç. Akgül, “Early Age Performance of Binary Fly Ash Portland Cement Blends,” İstanbul, Türkiye, 2014, p. 1, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/84561.