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首页> 外文期刊>Construction and Building Materials >Phyllite clays as raw materials replacing cement in mortars: Properties of new impermeabilizing mortars
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Phyllite clays as raw materials replacing cement in mortars: Properties of new impermeabilizing mortars

机译：天然石粘土替代砂浆中的水泥：新型抗渗砂浆的性能

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The aim of this investigation was to determine the suitability of phyllite clays as a raw construction material. For that purpose, the cement in mortars was replaced by a phyllite clay (0-90 wt%) making this study the first of its kind to be performed. These materials were prepared with different water proportions according to the water content and water/cement and water/binder (cement plus phyllite clay) relationships. A comparative study of the most important properties of the resulting experimental mortars was carried out, such as apparent density, water retentivity, consistency and mechanical strength (flexural and compressive strength), along with an evaluation of the pozzolanic activity and permeability. The results showed that the increase of phyllite decreases the apparent density, the consistency and mechanical properties of the mortar, while water retentivity fluctuates. Good correlations (R-2 > 0.84) were obtained between flexural and compressive strength for the mortars after 28 days of curing. Pozzolanic activity was observed at cement replacement of 80 wt% of phyllite. Moreover, new impermeabilizing mortars constituted by phyllite clay and cement have been obtained according to the low coefficients of permeability. Taking into account the findings of this research, phyllite clays can be applied as raw construction materials with savings derived from replacing cement in mortars and the low energy consumption involved in their production. However, the present study concluded that the use of phyllite clays did not improve the mechanical strength of these new mortars but, in contrast, they can be applied for impermeabilization purposes in Construction and Civil Engineering. (C) 2019 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是确定千晶石粘土作为建筑原料的适用性。为了这个目的，砂浆中的水泥被千层面石粘土（0-90 wt％）代替，这使这项研究成为同类研究中的第一次。这些材料根据水含量以及水/水泥和水/粘合剂（水泥加千枚石粘土）的关系以不同的水比例制备。进行了对所得实验砂浆最重要性能的比较研究，例如表观密度，保水性，稠度和机械强度（挠曲强度和抗压强度），并评估了火山灰活性和渗透性。结果表明，晶石的增加降低了砂浆的表观密度，稠度和力学性能，而保水性却有所波动。固化28天后，砂浆的抗折强度和抗压强度之间具有良好的相关性（R-2> 0.84）。在水泥置换80重量％的千晶石时观察到火山灰活性。此外，根据低渗透率系数，已经获得了由千层岩粘土和水泥构成的新型不透水砂浆。考虑到这项研究的结果，千层石粘土可以用作建筑原料，因为可以节省砂浆中的水泥，并且可以降低生产过程中的能耗。但是，本研究得出的结论是，使用千晶石粘土并不能提高这些新砂浆的机械强度，相反，它们可以用于建筑和土木工程的防渗目的。 （C）2019 Elsevier Ltd.保留所有权利。

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