More sustainable and environmentally friendly concretes are essential to reduce the climatic and environmental impact of the growing demand for concrete to fuel urban sprawl. This manuscript reports on an experimental study designed to test the fire resistance of one such concrete, prepared to contain natural zeolite-bearing tuff. The fire resistance of concretes containing natural zeolites has received little attention and is therefore poorly understood. Relative reductions in residual uniaxial compressive strength as a function of increasing temperature (up to 1000 °C) were very similar for the reference concrete (containing no tuff) and the tuff-bearing concrete. These data can be explained by the similar influence of high-temperature on the chemical (dehydroxylation reactions) and physical (microcracking and porosity) properties of both concretes. The satisfactory performance of the concrete containing natural zeolites following fire is welcome owing to the economic, climatic, and environmental benefits of using natural pozzolan and aggregate substitutes.

对于减少日益增长的对城市蔓延的混凝土需求的气候和环境影响，更可持续和环保的混凝土至关重要。这份手稿报道了一项旨在研究一种此类混凝土的实验研究，该混凝土含有天然沸石凝灰岩。含天然沸石的混凝土的耐火性很少受到关注，因此了解甚少。残余单轴抗压强度随温度升高（最高至1000°C）的相对降低与参考混凝土（不含凝灰岩）和含凝灰岩的混凝土非常相似。这些数据可以通过高温对两种混凝土的化学（脱羟基反应）和物理（微裂纹和孔隙率）特性的类似影响来解释。由于使用天然火山灰和骨料替代物的经济，气候和环境效益，含有天然沸石的混凝土在火灾后令人满意的性能受到欢迎。