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首页> 外文会议>International Conference on Non-Traditional Cement and Concrete >Shrinkage-Reducing Admixture Efficiency in Alkali-Activated Slag across the Different Doses of Activator
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Shrinkage-Reducing Admixture Efficiency in Alkali-Activated Slag across the Different Doses of Activator

机译：在不同剂量的活化剂上降低碱活性渣中的碱活化渣的缩小效率

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摘要

One of the largest obstacles for the wider use of alkali-activated slag (AAS) in a building industry is its severe drying shrinkage. According to some studies shrinkage-reducing admixtures (SRAs) could be a solution of this problem, but they were also reported to have a fatal impact on AAS hydration resulting in a serious strength development slowdown. The aim of this paper was to investigate this phenomenon in a wide range of the waterglass doses (4-12% Na_2O of the slag mass). Mortars without and with 2% of SRA based on hexylene glycol were prepared and their shrinkage and compressive strength development was tested. By far the highest shrinkage reduction was observed for the lowest doses of waterglass, but these were also the cases of the highest compressive strength decrease. However, it is possible to suppress the negative effect of SRA on AAS strength development through the activator dose increase with certainly decreased shrinkage reducing ability of SRA.
机译：在建筑业中更广泛地使用碱活化渣（AAS）的最大障碍之一是其严重的干燥收缩。根据一些研究，减少缩减的混合物（SRAS）可能是解决这个问题的解决方案，但还据报道他们对AAS水合产生致命的影响，导致严重的力量发展放缓。本文的目的是在广泛的水玻璃剂量（4-12％Na_2O的炉渣质量）中调查这种现象。制备没有基于己二醇的2％的砂浆进行制备，并测试其收缩和抗压强度显影。到目前为止，对于最低剂量的水玻璃，观察到最高收缩减少，但这些也是最高抗压强度的情况下降。然而，可以通过激活剂剂量增加抑制SRA对AAS强度发展的负面影响，随着SRA的收缩减少能力而肯定会降低。

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