This article presents a combined use of a retarder (d-gluconic acid) and an alkaline activator (sodium hydroxide) in a binder system based on ground granulated blast-furnace slag. The properties of the retarder are extending the dormant hydration period and suppressing the generation of strength-giving phases. Different retarder concentrations between 0.25 and 1.00 wt.% regulate the intensity and the period of the retardation and also the characteristics of the strength development. The activator concentration of 30 and 50 wt.% regulates the overcoming of the dormant period and thereby the solution of the slag and hence the formation of the hydration products. The research objective is to produce a mineral binder system based on two separate liquid components. The highest concentration of retarder and activator generates the highest compressive strength and mass of hydration products—after 90 days of hydration a compressive strength of more than 50 N/mm2. The main phases are calcium silicate hydrate and hydrotalcite. Generally, the combination of retarder and activator shows a high potential in the performance increase of the hydration process.
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机译:本文介绍了在基于粒状高炉矿渣的粘合剂体系中缓凝剂(d-葡萄糖酸)和碱性活化剂(氢氧化钠)的组合使用。缓凝剂的性能延长了休眠水化时间,并抑制了产生强度相的过程。介于0.25和1.00wt。%之间的不同的缓凝剂浓度调节延迟的强度和时间,以及强度发展的特征。活化剂浓度为30和50wt。%,调节了休眠期的克服,从而调节了炉渣的溶液,从而调节了水合产物的形成。研究目的是基于两种独立的液体成分生产矿物粘合剂系统。最高浓度的缓凝剂和活化剂产生最高的抗压强度和水合产物质量-水合90天后,抗压强度超过50 N / mm 2 sup>。主要相为硅酸钙水合物和水滑石。通常,缓凝剂和活化剂的组合在水合过程的性能提高中显示出高潜力。
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