Development of Anti-bonding Agent for Blast Furnace Slag Fine Aggregate
By T. Takahashi, K. Kinoshita, C. Yoshizawa and H. Mitsufuji
Concrete Journal, Vol.40, No.11, Nov. 2002
- Synopsis
- A shortage of high quality natural sand and the environmental constraints make the availability and the use of them less attractive for concrete. Fine aggregate manufactured by crushing a granulated blast furnace slag are used for concrete as one of replacements of natural sand. In that manufacturing process, anti-bonding agent is usually added to the blast furnace slag fine aggregate, in order to suppress their hydration and keep a long term storage in summer season. The authors have developed an advanced anti-bonding agent comprising oxycarboxylate derivative. The agent performs well for a longer term storage. On the constarary, the effects of the agent on the concrete properties were negligible.
- Keywords:
- water granulated blast furnace slag, blast furnace slag fine aggregate, bonding, anti-bonding agent, oxycarboxylate derivative
