Pollution Research Paper

Vol 33, Issue 02, 2014; Page No.(439-444)

EXPERIMENTAL RESEARCH ON IMPROVEMENT OF ACID RESISTANCE IN FLYASHED NANO-SILICA CONCRETE

S. YUVARAJ* AND D. SUJIMOHANKUMAR**

Abstract

Nano silica is the extremely fine silica that can be used as cement admixture in construction and civil engineering industries. Nano silica can be used to improve slurry impermeability and the mechanical properties of the hardened material. With the adoption of very fine silica particles in cement matrix, porosity and permeability were significantly declined to about 33.3% and 99% respectively and compressive strength grew. For conducting this experiment, blended cement has been used. The blended cement used here consists of ordinary Portland cement and fly ash replaced to some percentages of cement. The percentage of replacement of fly ash by cement is about 20%, 40%, 60% and 80% respectively. Fly ash is a fine, glass-like powdered substance obtained from gases created by coal-fired electric power generation. Fly ash is an inexpensive substance which is used for replacing ordinary portland cement in concrete, which thereby improves the segregation, strength and ease of pumping of the concrete. Fly ash is also used as a constituent in brick, block, paving, and structural fills. Consisting mostly of silica, iron and alumina Fly ash is a pozzolana substance containing aluminous and siliceous material which form cement in the presence of water. When it is mixed with lime and water they form a compound similar to Portland cement. The spherical structure of the particles reduces the internal friction thereby increasing the consistency and mobility of the concrete, allowing longer pumping distances. Increased workability means less amount of water is required, thus resulting in less segregation of the mixture. Even though fly ash is less dense than Portland cement, the produced concrete will be denser and results in smooth surface with sharper details. Class F of Fly ash, in which particles are covered in a kind of melted glass, greatly reduces the possibility of expansion due to sulfate attack, as may occur in fertilized soils or near coastal area. We have chosen Class F fly ash for replacing cement.

Enter your contact information below to receive full paper.
Your Name :
Email:
Phone:
City:
Cost of Full Paper: Rs.75 for Indian Nationals or $20 (USD) for international subscribers.
By clicking on Request Paper you Agree to pay the above mentioned cost per paper.
  
Journal Issues
Vol 39, Issue 2, 2020
Vol 39, Issue 1, 2020
Vol 39, Feb Suppl. Issue, 2020
Vol 38, Issue 4, 2019
Vol 38, November Suppl Issue
Vol 38, Issue 3, 2019
Vol 38, August Suppl Issue
Vol 38, Issue 2, 2019
Vol 38, March Suppl Issue
Vol 38, Issue 1, 2019
Vol 37, Issue 4, 2018
Vol 37, Issue 3, 2018
Vol 37, Issue 2, 2018
Vol 37, May Suppl. Issue 2018
Vol 37, Issue 1, 2018
Vol. 36, Issue 4, 2017
Vol. 36, Issue 3, 2017
Vol. 36, Issue 2, 2017
Vol. 36, Issue 1, 2017
Vol. 35, Issue 4, 2016
Vol. 35, Issue 3, 2016
Vol. 35, Issue 2, 2016
Vol. 35, Issue 1, 2016
Vol 34, Issue 4, 2015
Vol 34, Issue 3, 2015
Vol 34, Issue 2, 2015
Vol 34, Issue 1, 2015
Vol 33, Issue 04, 2014
Vol 33, Issue 03, 2014
Vol 33, Issue 02, 2014
Vol.33, Issue 01, 2014
Vol.32, Issue 04, 2013
Vol.32, Issue 03, 2013
Vol.32, Issue 02, 2013
Vol.32, Issue 1, 2013
Vol.31, Issue 04, 2012
Vol.31, Issue 3, 2012
Vol.31, Issue 2, 2012
Vol.31, Issue 1, 2012
Vol.30, Issue 4, 2011
Vol.30, Issue 3, 2011
Vol.30, Issue 2, 2011
Vol.30, Issue 1, 2011
Vol.29, Issue 4, 2010
Vol.29, Issue 3, 2010
Vol.29, Issue 2, 2010
Vol.29, Issue 1, 2010
Vol.26, Issue 3, 2007
Vol.20, Issue 02, 2001
Vol.20, Issue 01, 2001
Vol.19, Issue 03, 2000
Vol.19, Issue 01, 2000
Vol.18, Issue 02, 1999
Vol.17, Issue 04, 1998
Vol.17, Issue 03, 1998
Vol.17, Issue 01, 1998
Looking for Past Issues? Click here to get them!!