SUPER SLUMP RETAINING PCE BASED ADMIXTURES FOR SELF-CONSOLIDATING CONCRETE APPLICATIONS IN THE PRE-CAST CONCRETE INDUSTRY
Ever since the first prototype of Self-consolidating Concrete (SCC) was developed in Japan (1988), this type of concrete has come a big way across the globe. Notably, the worlds largest ready mix SCC pour was witnessed recently in the Middle East.SCC, however, still has practical issues in the pre-cast industry under hot ambient conditions in respective parts of the world, since there has to be a trade-off in achieving the right balance between high early strength and flowability retention for a reasonable period of time. Advancement in the Polycarboxylate ether (PCE) technology has now broken such application barriers and made it possible in practice to achieve equally both.By a skilful use of a building block methodology in PCE development, admixtures can help in reduction / elimination of both rapid loss of workability, as well as achieving desired strengths at early ages and minimizing autoclave / steam curing processes. This paper is useful for application engineers and pre-cast manufacturers for analyzing new generation PCE based admixtures in SCC applications for pre-cast and for understanding the improvements possible in pre-cast operations under hot climate conditions.
Nilotpol Kar Jianying Yang Sven Asmus Jan Kluegge
BASF Construction Chemicals, Asia Pacific, Singapore BASF Construction Chemicals, Asia Pacific, Shanghai
国际会议
长沙
英文
227-235
2009-06-05（万方平台首次上网日期，不代表论文的发表时间）