Different curing methods and compounds and effects on the compressive strength characteristic of Roller Compacted Concrete Pavements (RCCP)

Document Type : Original Article

Authors

1 Building & Road Materials & Products Department, Road, Housing & Urban Development Research Center (BHRC), Tehran, Iran

2 College of Interdisciplinary Science and Technology, University of Tehran, Iran

Abstract

This paper discusses the results of a research study conducted to evaluate the effect of curing methods and compounds on compressive strength of Roller Compacted Concrete Pavements (RCCP). Three types of curing compounds namely paraffin wax, chlorinated rubber, and silicate solution, were investigated in this study. Curing by immersion in water was used as the standard method of curing. The curing compounds were applied on the compressed concrete specimens by different methods. The effect of the selected curing regime on the properties of concrete specimens was evaluated by measuring compressive strength. The best performance was shown by concrete specimens cured by immersion in water. Water spraying followed by applying curing compounds and direct application of curing compounds were also investigated. According to the results, using liquid membrane forming curing compounds and silicate base curing compound causes decrease of 11-13% in the compressive strength of RCCP specimens compared to the specimens cured with water and increase of 12-19% compared to the specimens placed in laboratory without curing. Using chlorinated rubber emulsion as a liquid membrane forming curing compound after an initial curing with water, is recommended for curing of RCCP.

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