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Effects of In-Transit Addition of Superplasticizer

机译：超塑性化剂的过度加工的影响

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New automated slump control technology is available to manage the quality of concrete in a mixing truck. This technology measures the workability of concrete while in the mixing truck, and then adjusts the workability by adding water or superplasticizer during transit to the construction site. This paper describes this process control technology and the implications for polycarboxylate-based superplasticizer performance. Field data are presented showing the performance of superplasticizers when added in multiple doses during transit rather than all at once in the plant. The effect of varying superplasticizer dose on entrained air content is evaluated. The data confirm that the use of superplasticizer with process control technology can reduce variability in delivered slump. Recommendations are given for selecting admixtures and for programming process control systems to ensure optimal concrete performance.
机译：新的自动化坍落度控制技术可用于管理混合卡车中混凝土的质量。该技术在混合卡车中测量混凝土的可加工性，然后通过在运输过程中加入水或超级塑化剂来调节可加工性。本文介绍了该过程控制技术和对基于多羧酸酯的超塑化剂性能的影响。提出了现场数据，显示了在运输过程中以多​​剂量的添加而不是在植物中的所有剂量中添加时，超塑性剂的性能。评价不同超塑化剂剂量对夹带空气含量的影响。数据确认使用具有过程控制技术的超增生剂可以降低交付坍落度的可变性。提供了选择外加剂和编程过程控制系统的建议，以确保最佳的具体性能。

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