Schlupp Florian, Page Jonathan, Djelal Chafika, Libessart Laurent
Univ. Artois, IMT Nord Europe, Junia, Univ. Lille, ULR 4515, Laboratoire de Génie Civil et géo-Environnement (LGCgE), F-62400 Béthune, France.
Materials (Basel). 2024 Sep 13;17(18):4504. doi: 10.3390/ma17184504.
Biomass bottom ash (BBA) is a by-product of the energy industry and is produced from biomass-fired thermal power plants. They represent the coarsest fraction of the recovered ash and are mostly landfilled. Several researchers have investigated the feasibility of the use of BBA as a replacement for natural aggregates in cementitious material. The utilisation of BBA in the manufacturing of concrete provides an economic and ecological way to upcycle it. At the same time, its use conserves natural resources and promotes sustainability. This review article first presents the chemical, mineralogical and physical properties of BBA, to highlight the possible effects on cementitious materials and the interest in valorising them as a building material. Secondly, the focus is on the utilisation of BBA incorporated in place of natural aggregates used in the manufacturing of concrete. This review investigates the multi-physical properties of concrete manufactured with the partial incorporation of BBA. This substitution leads to decreased workability, which can be limited by the use of admixtures. In the hardened state, a reduction in the mechanical properties is shown with BBA replacement. However, many experimental works show that BBA can be used in appropriate proportions to maintain the specified properties of the concrete.
生物质底灰（BBA）是能源行业的一种副产品，由生物质火力发电厂产生。它们是回收灰烬中最粗的部分，大多被填埋。一些研究人员探讨了将BBA用作水泥基材料中天然骨料替代品的可行性。在混凝土制造中利用BBA提供了一种经济且生态的方式来对其进行升级回收。同时，其使用节约了自然资源并促进了可持续性。这篇综述文章首先介绍了BBA的化学、矿物学和物理性质，以突出其对水泥基材料可能产生的影响以及将其作为建筑材料进行增值利用的意义。其次，重点在于用BBA替代混凝土制造中使用的天然骨料的利用情况。本综述研究了部分掺入BBA所制备混凝土的多种物理性能。这种替代会导致工作性降低，这可通过使用外加剂来加以限制。在硬化状态下，用BBA替代会使力学性能有所降低。然而，许多实验研究表明，BBA可以以适当比例使用，以保持混凝土的规定性能。
