1 Assistant professor, Dept of Civil Engineering, S V U College of Engineering, S V University, Tirupati, Andhra Pradesh.
2 Principal and Professor, Gouthami Institute of Technology and Management for Women, Proddatur, Andhra Pradesh.
3 Professor, Dept of Civil Engineering, S V U College of Engineering, S V University, Tirupati, Andhra Pradesh.
*Email: srinamasa@gmail.com
Online published on 7 February, 2013.
The effect of lead (Pb) present in mixing water on compressive strength, setting times, soundness and sodium sulfate attack of high strength cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water and lead (Pb) spiked demonized water for reference and test specimens as mixing waters respectively. On comparison with reference specimens, at higher concentrations of lead in mixing water, test samples had shown considerable loss of strength, and also their setting times had significantly increased. However, at 2000 mg/L concentration of lead (Pb), the compressive strength marginally increased. Apart that when reference specimens and test specimens immersed in various concentrations of sodium sulfate solution at different immersed ages, the loss in compressive strength was a little less in test specimens compared with reference specimens. XRD technique was employed to find out main compounds.
Cement mortar, Lead (Pb), Silica fume (SF), Sodium sulfate, Superplasticiser (SP)
