Bringing nature into urban areas is largely recognized as one of the multiple benefits of green walls. Among the existing types of living walls, those made from durable building materials have a longer lifespan and require less maintenance than many typical green wall systems. In that context, there is a need to study the bioreceptivity of materials, i.e., their ability to host living organisms. This paper presents a novel method to study the bioreceptivity of materials, by enhancing the biological and physicochemical exchanges in different mixtures of crushed materials and substrates, and by measuring their effect on plant growth. For this experiment, we crushed and sieved four different building materials (3 types of concretes and 1 brick) to increase their contact surface. We then mixed them with substrate with or without compost additions. The mixtures were used as growing media for the cultivation of two wild mural plant species in a glasshouse. Plant growth and the physicochemical evolution of the mixtures were monitored for one year. The study shows the physical and chemical differences between the building materials, their interactions with substrate composition, and their effect on plant growth. Two main results appeared: (i) high pH (>8) was the major constraint against plant growth (ii) compost additions significantly compensated for adverse characteristics of the materials. Assuming that higher plant growth is associated with better bioreceptivity, this experiment introduces a quantitative method that could contribute to the evaluation of the agronomic properties of building materials. The results allow us to make recommendations for Living wall and Technosol design.

将自然带入城市地区在很大程度上被认为是绿化墙的多重好处之一。在现有类型的生活墙中，那些由耐用建筑材料制成的墙具有更长的使用寿命，并且比许多典型的绿色墙系统需要更少的维护。在这种情况下，需要研究材料的生物感受性，即它们承载活生物体的能力。本文提出了一种研究材料生物感受性的新方法，通过增强粉碎材料和基质的不同混合物中的生物和物理化学交换，并测量它们对植物生长的影响。在这个实验中，我们粉碎并筛分了四种不同的建筑材料（3 种混凝土和 1 种砖）以增加它们的接触面。然后我们将它们与底物混合，添加或不添加堆肥。这些混合物被用作生长介质，用于在温室中培养两种野生壁画植物。植物生长和混合物的物理化学演变被监测了一年。该研究显示了建筑材料之间的物理和化学差异、它们与基质成分的相互作用以及它们对植物生长的影响。出现了两个主要结果：(i) 高 pH (>8) 是植物生长的主要制约因素 (ii) 添加堆肥显着补偿了材料的不利特性。假设更高的植物生长与更好的生物感受性相关，本实验介绍了一种定量方法，有助于评估建筑材料的农艺特性。结果使我们能够为 Living wall 和 Technosol 设计提出建议。