用脱絮凝试验表征外加剂增塑剂和高效增塑剂在不同水泥中的作用

A. Macías, S. Goñi
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引用次数: 0

摘要

为了快速区分增塑剂和超减水剂,基于A. Verhasselt和J. Pairon提出的方法,对不同的水泥外加剂进行了脱絮凝试验。所使用的外加剂是含有不同比例木质素磺酸盐(L)、磺化萘甲醛冷凝物(SNF)和磺化三聚氰胺甲醛冷凝物(SMF)的商品。采用了三种不同的水泥:低铝酸三钙(C3A = 2.5%)、高碱含量(Na2O当量= 0.95%)和高细度硅酸盐水泥(A.A. Blaine = 5002 cm2/gr)。此外,还计算了高效减水剂的最小有效用量。通过该方法得到的结果清楚地显示了水泥类型在最小有效剂量下的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Application of Deflocculation Test to Characterise the Admixture Plasticizer and Superplasticizer Effect in Different Cements
A deflocculation test based on the method proposed by A. Verhasselt and J. Pairon has been applied to different mixes of cement-admixtures in order to distinguish quickly between plasticizer and superplasticizer. The admixtures used were commercial products containing different proportions of lignosulphonates (L), sulphonated naphthalene formaldehyde condensate (SNF) and sulfphonated melamine formaldehyde condensate (SMF). Three different cements were employed: a low tricalcium aluminate (C3A = 2.5%), a high alkali content (Na2O equivalent = 0.95%) and a high fineness portland cement (A.A. Blaine = 5002 cm2/gr). In addition, the minimum active dosage of superplasticizer was calculated. The influence of the type of cement in the minimum active dosage is clearly shown by the results obtained through this method.
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