Specific Design Features of Prefabricated Fire-Resistant Floor Slabs Made from Lightweight Concrete

IF 0.6 Q4 ENGINEERING, CIVIL

Slovak Journal of Civil Engineering Pub Date : 2022-03-01 DOI:10.2478/sjce-2022-0001

O. Konoplianyk, Nikolay Kotov, Illia Iliev

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引用次数: 4

Abstract

Abstract Reinforced concrete roof and floor structures have the highest heating temperatures and are exposed to the most difficult conditions during fires that occur in buildings and structures. The standardized fire resistance of hollow-core slabs made of heavy concrete from Portland cement is regulated as REI 45 or REI 60. The aim of the work is to develop a composition of lightweight fire-resistant concrete and architectural engineering for floor slab devices. The composition of lightweight fire-resistant concrete made from expanded clay aggregates and alumina cement was developed as a result of the work. The degree of fire resistance of the lightweight concrete composition with a bulk density of 1475 kg/m3 has been practically determined; i.e., REI 90. The structural solution of the floor slab has been improved; at the same time, we propose to develop a slab with a flat section made of lightweight fire-resistant concrete. Such floor slabs, along with an increase in the fire resistance limit, improve the heat-insulating ability of a floor due to a significant reduction in the coefficient of the thermal conductivity of lightweight concrete.

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轻质混凝土预制防火楼板的特殊设计特点

摘要钢筋混凝土屋顶和地板结构在建筑物和结构发生火灾时具有最高的加热温度，并暴露在最困难的条件下。由硅酸盐水泥制成的重型混凝土制成的空心板的标准耐火性被规定为REI 45或REI 60。这项工作的目的是开发一种用于楼板装置的轻质耐火混凝土成分和建筑工程。根据这项工作，开发了由膨胀粘土骨料和氧化铝水泥制成的轻质耐火混凝土的成分。体积密度为1475kg/m3的轻质混凝土组合物的耐火程度已经实际确定；即REI 90。改进了楼板的结构解决方案；同时，我们建议开发一种由轻质耐火混凝土制成的平截面楼板。这种楼板，随着耐火极限的增加，由于轻质混凝土的导热系数的显著降低，提高了地板的隔热能力。

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来源期刊

Slovak Journal of Civil Engineering ENGINEERING, CIVIL-

自引率

0.00%

发文量

审稿时长

29 weeks