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首页> 外文期刊>Magazine of Concrete Research >The effects of precursors on rheology and self-compactness of geopolymer concrete
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The effects of precursors on rheology and self-compactness of geopolymer concrete

机译：前体对地缘聚合物混凝土流变与自厚度的影响

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The inefficiency of typical superplasticisers in geopolymer compared with Portland cement limits the design of a self-compacting concrete. This study investigated the rheology, reactivity and strength of a fly ash, slag and micro fly ash system without superplasticisers in order to find an optimum self-compacting behaviour. The particle size distribution was used to design a mixture of precursors with the highest packing density. The theoretical packing density based on particle size distribution was in close agreement with experimentally obtained packing densities. The effect of the width of the particle size distribution, as determined by the n value in the Rosin-Rammler function, on the rheology of the pastes was confirmed by a close agreement between the predicted yield stress and the experimental values. The initial setting time decreased with the increase in slag and micro fly ash. Finally, a geopolymer concrete was designed that meets the workability requirement of self-compacting concrete with comparable compressive strength without superplasticisers.
机译：与波特兰水泥相比，地缘聚合物中典型超塑性体的效率低下限制了自压制混凝土的设计。本研究调查了粉煤灰，炉渣和微粉煤灰系统的流变，反应性和强度，无需超塑性体，以找到最佳的自重式行为。粒度分布用于设计具有最高填充密度的前体的混合物。基于粒度分布的理论包装密度与实验获得的包装密度密切一致。通过松香 - 垃圾箱函数中的N值确定的粒度分布的宽度对浆料的流变学通过预测的屈服应力和实验值之间的密切一致来证实。随着炉渣和微粉煤灰的增加，初始设定时间降低。最后，设计了一种地缘聚合物混凝土，符合自压缩混凝土的可加工性要求，具有超塑性体的可比压缩强度。

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