Alkali silica reaction in ultra-high performance concrete containing rice husk ash
Abstract
In the present study, the risk of alkali silica reaction of ultra-high performance concrete (UHPC) was assessed in NaOH solution and accelerated climate condition. The UHPC containing rice husk ash (RHA) with and without ground granulated blast-furnace slag (GGBS) were used. The results were compared with those of UHPCs containing silica fume (SF). The durability of the RHA-blended was high but not better than that of the SF-blended UHPCs. There should be no concern about alkali silica reaction problem in the UHPC containing RHA, especially with GGBS combination. When samples were immersed in NaOH solution, the length change result of the testing significantly depends on the permeability, the autogenous shrinkage and the size of samples.
Keywords: UHPC, Rice husk ash, GGBS, Silica fume, Alkali silica reaction.
Received: September 27th, 2017; revised: October 27th, 2017; accepted: November 2nd, 2017
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