Skip to main content Accessibility help
×
Home

LWA as Internal Curing Agent to Control Availability of Internal Curing Water in Concrete

  • Luis Emilio Rendon (a1), Montserrat Rendon (a2) and Norma Ramirez (a1)

Abstract

The effectiveness of lightweight aggregate (LWA) as an internal curing agent (ICA) to reduce concrete shrinkage is evaluated for repair concrete used in cultural heritage works (RCCHW) using curing periods of 30 days. Normal weight aggregate is replaced by LWA at volume replacement levels ranging from 10 to 14%. The mixtures contain Portland cement maintaining the paste content at approximately 24.1% of concrete volume. Comparisons are made with mixtures containing low-absorption granite and high-absorption limestone normal weight coarse aggregates. At the replacement levels used in this study, LWA results in a small reduction in concrete density, no appreciable effect on concrete compressive strength, and a decrease in concrete shrinkage for drying periods up to 30 days. With a curing period of 14 days, all mixtures with LWA exhibited less shrinkage than the mixtures with either low- or high-absorption normal weight aggregates.

Copyright

References

Hide All
1. Lura, P., Bentz, D. P., Lange, D. A., Kovler, K. and Bentur, A., (2004) “Pumice Aggregates for Internal Water Curing,” Concrete Science and Engineering: International RILEM Symposium, 2004, pp. 137151.
2. Tazawa, E. and Miyazawa, S. (1995). Experimental Study on Mechanism of Autogenous Shrinkage of Concrete. Cement and Concrete Research, 28(8), 16331638.
3. Bentz, D. P. and Weiss, W. J. (2011). Internal Curing: A 2010 State-of-the-Art Review, Report NISTIR 7765, National Institute of Standards and Technology, Gaithersburg, MD, USA.
4. Tanya Wattenburg Komas, (2009). Concrete repair in the new century, Concrete Repair Bulletin, pages 1821 March/April

Keywords

LWA as Internal Curing Agent to Control Availability of Internal Curing Water in Concrete

  • Luis Emilio Rendon (a1), Montserrat Rendon (a2) and Norma Ramirez (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed