Kumar, Sanjay and Kumar, Rakesh and Bandopadhyay, A and Alex, T C and Ravi Kumar, B and Das, Swapan K and Mehrotra, S P (2008) Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of portland slag cement. Cement and Concrete Composites, 30 (8). pp. 679-685.
Restricted to NML users only. Others may use ->
Mechanically activated granulated blast furnace slag (GBFS) was used in the range of 50–95% to replace clinker in portland slag cement (PSC). The slag and clinker were activated separately using an attrition mill and mixed to prepare cement formulations. Use of activated slag resulted in a remarkable increase in strength vis-à-vis commercial slag cement. Both 1-day and 28-day strength were found to increase with an increase in slag content up to 70%. The strength of the sample containing 80–85% slag was comparable to the commercial cement used as a reference. It was observed that mechanical activation of slag was more critical from the point of view of strength development. The hydrated cement samples were characterised using powder X-ray diffraction (XRD), scanning electron microscopy with X-ray microanalysis (SEM-EDS) and simultaneous thermogravimetry and differential thermal analysis (TG/DTA). It is established that microstructural changes resulting from enhanced reactivity of slag and densification are related with the improvement in cement strength.
|Uncontrolled Keywords:||Mechanical activation; Granulated blast furnace slag; Microstructure; Compressive strength; Blended cement|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||03 Jun 2010 11:29|
|Last Modified:||03 Jan 2012 12:44|
Repository Staff Only: item control page