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首页> 外文会议>Tenth international conference on superplasticizers and other chemical admixtures 2012 >Relative Behavior of Carboxylic and Phosphorous-Based Dispersants
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Relative Behavior of Carboxylic and Phosphorous-Based Dispersants

机译：羧酸和磷基分散剂的相对行为

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The development of carboxylic-based PCE superplasticizers in the last 10 to 15 years has prompted the development of concrete applications which would have been of difficult accomplishment without such materials. The main difference between PCE superplasticizers and the products which were used before lie in the long slump retention which can be obtained with such products. Another important characteristic of PCE superplasticizers is that their efficiency is obtained at low dosage, and consequently they alter in a minimal way the chemistry of cement hydration. However PCE superplasticizers show a high sensitivity to small changes of the chemistry of the hydrating cement paste. A range of phosphorous-based superplasticizers have been developed that show greater robustness of performance, still having the characteristics of long slump retention, low hydration and hardening retardation and low dosage efficiency. In the present paper we investigate the particle-particle interactions in the presence of PCE and phosphorous-based superplasticizers.
机译：在过去的10到15年中，基于羧酸的PCE高效减水剂的发展促使混凝土应用的发展，如果没有这种材料，这些应用将很难实现。 PCE高效减水剂与之前使用的产品之间的主要区别在于，使用此类产品可获得的长期坍落度保持力。 PCE高效减水剂的另一个重要特征是，在低剂量下即可获得其功效，因此它们以最小的方式改变了水泥水化的化学性质。但是，PCE高效减水剂对水合水泥浆化学变化的敏感性很高。已经开发出一系列的基于磷的高效减水剂，它们表现出更大的性能鲁棒性，仍然具有长坍落度保持，低水合和硬化延迟以及低剂量效率的特征。在本文中，我们研究了在PCE和磷基高效减水剂存在下的颗粒间相互作用。

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