增粘剂(VMA)对自固结混凝土性能的影响

SP-233: Workability of SCC: Roles of Its Constituents and Measurement Techniques Pub Date : 2006-03-09 DOI:10.14359/15820

B. Christensen, F. S. Ong

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引用次数: 0

摘要

本文介绍了如何使用粘度改性外加剂(VMA)来实现高流体自固结混凝土(SCC)的稳定性。目前，市场上有几种类型的vma。最常见的三种类型是基于纤维素醚、生物聚合物和合成聚合物。本文对这三种vma的性能进行了研究和比较。具体而言，研究了这三种类型的vma对自固结混凝土性能的影响。特别关注了每个VMA对SCC以下特征的影响:(1)高范围减水剂(HRWR)的剂量响应;(2)引气剂(AEA)的剂量反应;(3)混合液的稳定性;(4)对凝结时间的影响;(5)抗压强度发展。

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The Influence of Viscosity-Modifying Admixture (VMA) on the Performance of Self-Consolidating Concrete (SCC)

This paper describes how the stability of highly fluid self-consolidating concrete (SCC) can be achieved by using a viscosity-modifying admixture (VMA). Currently, there are several types of VMAs available in the market place. Three of the most common types are based on cellulose-ethers, biopolymers and synthetic polymers. This paper studied and compared the properties of these three types of VMAs. Specifically, the influence of these three types of VMAs on the properties of self-consolidating concrete (SCC was studied. Particular attention was placed on the influence of each VMA on the following characteristics of the SCC: (1) dose response of high range water reducer (HRWR); (2) dose response of air entraining agent (AEA): (3) stability of the mixture; (4) effects on time of setting; and (5) compressive strength development.

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SP-233: Workability of SCC: Roles of Its Constituents and Measurement Techniques

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