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首页> 外文会议>RILEM Proceedings PRO 40; International RILEM Conference on the Use of Recycled Materials in Buildings and Structures vol.2; 20041108-11; Barcelona(ES) >RECYCLING OF POWER STATION COAL FLY ASHES AS BUILDING ELEMENTS TO BE USED IN PASSIVE FIRE PROTECTION
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RECYCLING OF POWER STATION COAL FLY ASHES AS BUILDING ELEMENTS TO BE USED IN PASSIVE FIRE PROTECTION

机译：回收电站煤粉煤灰作为被动防火中使用的建筑元素

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In this article, the insulating and mechanical properties of products containing fly ash as a major component ( > 75% w/w) are analysed. Fly ashes fom the combustion of pulverised coal in different Spanish thermal power plants (Los Barrios, Meirama and Lada) were tested with the aim of better defining the desirable characteristics of this type of ash (class F ASTM) with regard to the elaboration of insulating materials to be used in doors and fire-resistant screens in industrial buildings. Thus, the effect of different ashes was studied using gypsum as binder. After blending the ashes, binders and water (water / solids = 0.4), 50-mm-diameter, 200-mm-high cylindrical test probes were made; after a setting time of 28 days, they were placed in an oven and subjected to a fire resistance curve according to Spanish regulations (EN-UNE 1363-1). The insulating capacity of the cylindrical test probes was measured as the time needed to reach a temperature of 400℃ in the centre of the cylinder. In addition, the compressive strength, before and after the insulating capacity test, and the dynamic elasticity modulus of the test probes were measured. The results show that the origin of the studied ashes does not have a significant influence on the insulating capacity of the products. Nevertheless, different mechanical properties were observed due to the characteristics of the ashes. These results allow us to make a more general statement about the recycling possibilities of these types of by-products in useful constructive applications for the passive protection against fire; in some cases, the use of additives for improving the mechanical properties of the products is advisable.
机译：在本文中，分析了以粉煤灰为主要成分（> 75％w / w）的产品的绝缘和机械性能。测试了粉煤灰在西班牙不同火力发电厂（洛斯巴里奥斯，梅拉玛和拉达）燃烧煤粉的过程，目的是更好地定义这种粉煤灰的理想特性（F ASTM类）用于工业建筑的门和防火屏风的材料。因此，使用石膏作为粘合剂研究了不同灰分的效果。将骨灰，粘合剂和水（水/固体= 0.4）混合后，制成直径50毫米，高200毫米的圆柱形测试探针；固化28天后，将其置于烤箱中，并根据西班牙法规（EN-UNE 1363-1）进行耐火曲线测试。圆柱形测试探针的绝缘能力是在圆柱体中心达到400℃所需的时间来测量的。另外，测量了绝缘能力测试之前和之后的抗压强度以及测试探针的动弹性模量。结果表明，所研究骨灰的来源对产品的绝缘能力没有显着影响。然而，由于骨灰的特性，观察到不同的机械性能。这些结果使我们可以更广泛地说明这些类型的副产品在有用的建筑应用中的被动回收防火的回收可能性；在某些情况下，建议使用添加剂来改善产品的机械性能。

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