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首页> 外文期刊>Construction and Building Materials >Effect of Granulated Blast Furnace Slag and fly ash addition on the strength properties of lightweight mortars containing waste PET aggregates
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Effect of Granulated Blast Furnace Slag and fly ash addition on the strength properties of lightweight mortars containing waste PET aggregates

机译：高炉矿渣和粉煤灰的添加对含有废弃PET骨料的轻质砂浆强度特性的影响

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摘要

In this work, the effect of Granulated Blast Furnace Slag (GBFS) and fly ash (FA) addition on the strength properties of lightweight mortars containing waste Poly-ethylene Terephthalate (PET) bottle aggregates was investigated. Investigation was carried out on three groups of mortar specimens. One made with only Normal Portland cement (NPC) as binder, second made with NPC and GBFS together and, third made with NPC and FA together. The industrial wastes mentioned above were used as the replacement of cement on mass basis at the replacement ratio of 50%. The size of shredded PET granules used as aggregate for the preparation of mortar mixtures were between 0 and 4 mm. The waste lightweight PET aggregate (WPLA)-binder ratio (WPLA/fc) was 0.60; the water-binder {w/b) ratios were determined as 0.45 and 0.50. The dry unit weight, compressive and flexural-tensile strengths, carbonation depths and drying shrinkage values were measured and presented. The results have shown that modifying GBFS had positive effects on the compressive strength and drying shrinkage values (after 90 days) of the WPLA mortars. However, FA substitution decreased compressive and flexural-tensile strengths and increased carbonation depths. Nevertheless a visible reduction occurred on the drying shrinkage values of FA modifying specimens more than cement specimens and GBFS modified specimens. The test results indicated that, GBFS has a potential of using as the replacement of cement on the WPLA mortars by taking into consideration the characteristics. But using FA as a binder at the replacement ratio of 50% did not improve the overall strength properties. Although it was thought that, using FA as binder at the replacement ratio of 50% for the aim of production WPLA concrete which has a specific strength, would provide advantages of economical and ecological aspects.
机译：在这项工作中，研究了粒状高炉矿渣（GBFS）和粉煤灰（FA）对含有废聚对苯二甲酸乙二酯（PET）瓶骨料的轻质砂浆的强度性能的影响。对三组砂浆标本进行了调查。一种是仅以普通波特兰水泥（NPC）作为粘合剂制成，第二种是由NPC和GBFS一起制成，第三种是由NPC和FA一起制成。上述工业废料以50％的置换率以质量基准代替水泥。用作制备砂浆混合物的骨料的切碎的PET颗粒的大小在0到4毫米之间。废弃的轻质PET骨料（WPLA）-粘合剂比（WPLA / fc）为0.60；水粘合剂（w / b）比被确定为0.45和0.50。测量并给出了干单位重量，抗压强度和弯曲强度，碳化深度和干燥收缩率。结果表明，改性GBFS对WPLA砂浆的抗压强度和干燥收缩值（90天后）具有积极影响。但是，FA替代会降低抗压强度和弯曲拉伸强度，并增加碳化深度。然而，FA改性样品的干燥收缩值比水泥样品和GBFS改性样品明显减少。试验结果表明，考虑到其特性，GBFS有潜力替代WPLA砂浆中的水泥。但是，以50％的置换比例使用FA作为粘合剂并不能改善整体强度性能。尽管人们认为，以50％的替代比例使用FA作为粘合剂以生产具有特定强度的WPLA混凝土的目的，将提供经济和生态方面的优势。

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