Manufacture of green building materials has been increasing recently. There are many scientific publications related to lignocellulosic waste incorporation in Portland cement systems, but only few research works on the waste recovery in alkali-activated binders can be found. Alkali-activated materials could be a choice of ecological and renewable materials due to good durability, as well as mechanical and thermal properties. The paper analyses the performance of bio-composite material made of alkali-activated slag with the addition of phosphogypsum at 5 wt% by weight of slag or at 3.6 wt% by weight of other bio-composite components including softwood shavings (WS). Relationships between density, compressive and flexural strength, thermal conductivity and WS content were observed. The microstructure of bio-composite specimens was also examined. Usually, alkali-activated binders have relatively low flexural strength, which limits their application possibilities. In this work, it was succeeded to increase the flexural strength by incorporating wood shavings (WS) in this binder. According to the results, the appropriate addition of WS can improve the flexural properties of alkali-activated slag bio-composites, especially at later ages of 28 days. It is concluded that bio-composite from alkali-activated slag blended with WS has a great potential in construction materials industry. Depending on the composition, this bio-composite had flexural strength of 10.7 MPa, compressive strength of 11.5 MPa, and thermal conductivity of 0.30 W (mK)⁻¹. The main practical advantages of this bio-composite are based on practical demand: the mechanical, thermal properties and waste utilization aspects are balanced.

中文翻译：

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刨花和碱活化矿渣的生物复合材料

最近，绿色建筑材料的生产一直在增加。关于将硅纤维素废料掺入波特兰水泥系统中的科学出版物很多，但关于碱活化粘合剂废料回收的研究工作很少。碱活化材料由于其良好的耐久性以及机械和热性能，可以是生态和可再生材料的选择。本文分析了碱活化矿渣制成的生物复合材料的性能，其中磷石膏的加入量为矿渣重量的5％（重量）或其他生物复合组分（包括软木刨花（WS））的3.6％（重量）。观察到密度，抗压强度和弯曲强度，热导率和WS含量之间的关系。还检查了生物复合材料标本的微观结构。通常，碱活化的粘合剂具有相对低的挠曲强度，这限制了它们的应用可能性。在这项工作中，通过在该粘合剂中加入刨花（WS）成功提高了挠曲强度。根据结果​​，适当添加WS可以改善碱活化矿渣生物复合材料的弯曲性能，尤其是在28天以后的年龄。结论：碱活化矿渣与WS掺合的生物复合材料在建材行业具有巨大的潜力。根据组成的不同，该生物复合材料的弯曲强度为10.7 MPa，抗压强度为11.5 MPa，导热系数为0.30 W（mK）通过在该粘合剂中加入刨花（WS），成功提高了挠曲强度。根据结果​​，适当添加WS可以改善碱活化矿渣生物复合材料的弯曲性能，尤其是在28天以后的年龄。结论是，碱活化矿渣与WS混合而成的生物复合材料在建材行业具有巨大的潜力。根据组成的不同，该生物复合材料的弯曲强度为10.7 MPa，抗压强度为11.5 MPa，导热系数为0.30 W（mK）通过在该粘合剂中加入刨花（WS），成功提高了挠曲强度。根据结果​​，适当添加WS可以改善碱活化矿渣生物复合材料的弯曲性能，尤其是在28天以后的年龄。结论：碱活化矿渣与WS掺合的生物复合材料在建材行业具有巨大的潜力。根据组成的不同，该生物复合材料的弯曲强度为10.7 MPa，抗压强度为11.5 MPa，导热系数为0.30 W（mK）结论：碱活化矿渣与WS掺合的生物复合材料在建材行业具有巨大的潜力。根据组成的不同，该生物复合材料的弯曲强度为10.7 MPa，抗压强度为11.5 MPa，导热系数为0.30 W（mK）结论是，碱活化矿渣与WS混合而成的生物复合材料在建材行业具有巨大的潜力。根据组成的不同，该生物复合材料的弯曲强度为10.7 MPa，抗压强度为11.5 MPa，导热系数为0.30 W（mK）^-1。这种生物复合材料的主要实用优势基于实际需求：机械，热性能和废物利用方面保持平衡。