新型苯酞磺酸基预制用高效减水剂的研制

I. Torresan, R. Magarotto, R. Khurana
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引用次数: 0

摘要

苯磺酸凝聚剂(NS)和三聚氰胺磺酸凝聚剂(MS)聚合物基高效减水剂在预制工业中得到了广泛的应用。不断提高混凝土性能的需求导致了具有更高减水率和更高早期强度的产品的开发,典型的三聚氰胺基高效减水剂,但没有这种高效减水剂有时会遇到的和易性损失的缺点。本文中描述的新产品的化学成分经过专门设计,以实现高的早期和长期强度,在三聚氰胺常用剂量范围内保持NS产品的典型可加工性。该新产品的优异性能使其成为预制应用中三聚氰胺基高效减水剂的良好替代品。本文报道了新型b -萘磺酸盐型高效减水剂对混凝土减水率、空气含量和抗压强度的影响,该减水剂采用符合en197 -1新标准的不同型号和牌号水泥配制。结果表明,这种新型NS基产品在减水和强度发展方面可以取得显著改善,特别是与CEM I型水泥一起使用时。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of a New Betanaphthaline Sulfonate-Based Superplasticizer Especially Studied for Precast Application
Betanaphthalene sulfonate condensate (NS) and melamine sulfonate condensate (MS) polymers based superplasticizers have been extensively used in the Precast Industry. Continuous need for improving the performance of concrete has led to the development of products with a higher water reduction and thus higher early strength, typical of melamine based superplasticizers, but without the drawback of workability loss sometimes encountered with this kind of superplasticizers. The chemistry of the new product described in this article has been specifically designed to achieve high early and long term strength maintaining the workability typical of NS products at dosages in the range commonly used with melamines. The superior performance obtained with this new product makes it a good alternative to melamine based superplasticizers when used in precast applications. The paper reports the effect of the new B-naphthalene sulfonate based superplasticizer on water reduction, air content and compressive strength in concrete prepared with different types and brands of cement conforming to the new EN 197-1 standards. The results show that significant improvements in terms of water reduction and strength development can be achieved with this new NS based product, especially when used with CEM I type cements.
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