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首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >SUPER SLUMP RETAINING PCE BASED ADMIXTURES FOR SELF-CONSOLIDATING CONCRETE APPLICATIONS IN THE PRE-CAST CONCRETE INDUSTRY
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SUPER SLUMP RETAINING PCE BASED ADMIXTURES FOR SELF-CONSOLIDATING CONCRETE APPLICATIONS IN THE PRE-CAST CONCRETE INDUSTRY

机译：用于预固结混凝土行业中自固结混凝土应用的基于超硬性固结PCE的添加剂

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摘要

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 world's 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.
机译：自从日本于1988年开发出第一个自固结混凝土原型（SCC）以来，这种类型的混凝土已在全球范围内取得了很大的进步。值得注意的是，最近在中东见证了世界上最大的预拌SCC浇注。但是，SCC在世界各地高温环境下的预制行业中仍然存在实际问题，因为必须进行贸易。在合理的时间内在较高的早期强度和流动性保持率之间取得适当的平衡。聚羧酸醚（PCE）技术的进步现已打破了此类应用壁垒，并在实践中实现了两者的均等化。通过巧妙地在PCE开发中使用构建基方法学，混合物可以帮助减少/消除两者的快速损失的可加工性，以及在早期达到所需的强度并最大程度地减少高压釜/蒸汽固化过程。本文对应用工程师和预制制造商有用，可用于分析SCC应用中基于PCE的新一代外加剂以进行预制，并有助于了解炎热气候条件下预制操作中可能的改进。

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