The specific heat capacity at the high temperature of fire-resistant gypsum boards plays a vital role in the simulation accuracy of the thermal response for cold-formed steel (CFS) composite structures. However, there are not given comprehensive and accurate values in the existing standard for test parameters (including heating rate, sample quality, and sample size) used in the test of the specific heat capacity of gypsum boards. This situation leads to large differences in test results. This paper aimed to provide standardized test parameters for obtaining accurate specific heat capacity curves of gypsum boards. First, the effect of test parameters was quantified by 10 groups of specific heat capacity tests of gypsum boards through the uniform design; Then, the standardized values of test parameters were proposed combined with sample composition analysis and finite element numerical analysis: the heating rate was 12°C/min, the sample mass was 18 mg, the sample particle size was 45 to 48 μm; Finally, the standardized test parameters were verified by comparing with the test results of cold-formed steel composite floors in the literature. The results show that the specific heat capacity curve of gypsum boards measured by the standardized test parameters proposed to this paper has good accuracy for simulating the time-temperature curve of cold-formed steel composite floors. It is conducive to accurately assess the fire resistance of cold-formed steel composite floors. The test parameter standardization method can also be extended to other building materials. As a result, the specific heat capacity test can follow a basic standard.

中文翻译：

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耐火石膏板高温比热容试验参数的标准化

耐火石膏板在高温下的比热容对冷弯型钢 (CFS) 复合结构热响应的模拟精度起着至关重要的作用。但是，对于石膏板比热容测试所使用的测试参数（包括升温速率、试样质量、试样尺寸），现行标准中并没有给出全面准确的数值。这种情况会导致测试结果的巨大差异。本文旨在为获得准确的石膏板比热容曲线提供标准化的测试参数。首先，通过统一设计，通过10组石膏板比热容测试量化测试参数的影响；然后，结合试样成分分析和有限元数值分析，提出试验参数标准化值：升温速率12℃/min，试样质量18 mg，试样粒径45～48 μm；最后，通过与文献中冷弯型钢复合地板的测试结果进行对比，对标准化的测试参数进行验证。结果表明，采用本文提出的标准化试验参数测得的石膏板比热容曲线对于模拟冷弯型钢复合地板时温曲线具有较好的准确性。有利于准确评估冷弯型钢复合地板的耐火性能。测试参数标准化方法也可以推广到其他建筑材料。因此，