温度影响下不同级配生土材料吸湿性能的研究  

Hygroscopic Properties of Soil Materials of Different Grades under the Influence of Temperature

作　　者：冯梅瑾 穆钧 于沈尉 FENG Meijin;MU Jun;YU Shenwei(School of Architecture and Urban Planning,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Energy Conservation and Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing 100044,China;Beijing Key Laboratory of Green Building and Energy-efficiency Technology,Beijing 100044,China)

机构地区：[1]北京建筑大学建筑与城市规划学院,北京100044 [2]北京节能减排与城乡可持续发展省部共建国家协同创新中心,北京100044 [3]绿色建筑与节能技术北京市重点实验室,北京100044

出　　处：《建筑节能（中英文）》2024年第9期30-37,共8页Building Energy Efficiency

基　　金：绿色建筑与节能技术北京市重点实验室开放基金/分类发展定额项目——博士研究生科研能力提升项目(DG2022001)。

摘　　要：采用饱和盐溶液法,研究了9种级配生土材料在不同温湿度环境下的吸湿性能。研究结果表明,当环境温度在10~30℃之间时,生土材料的平衡含湿量随着温度的升高呈现出先增大后降低的趋势,在20~25℃区间内平衡含湿量达到最大。低温环境下,级配对生土材料吸湿量的影响相对较小,吸湿速率相对较慢。当土、沙、石比例为28∶67∶6时,生土材料吸湿性能相对较差(最大平衡含湿量约为2.66%);而当土、沙、石比例为45∶13∶42时,生土材料吸湿性能相对较好(最大平衡含湿量约为3.95%)。由此可见,小粒径成分含量高的生土材料展现出更好的吸湿性能。此外,采用数据拟合的方法对不同吸湿性能预测模型进行分析,最终修正了温度因子对预估数值的影响,且修正系数与温度之间符合二次函数关系α=-0.0656t2+0.4185t+0.3033,相关性系数高达0.9354。上述结论为生土材料平衡环境温湿度性能的量化计算提供了科学便捷的方法。The hygroscopic properties of nine kinds of graded soil materials under different temperature and humidity conditions are studied by saturated salt solution method.The results show that when the ambient temperature is between 10℃and 30℃,the equilibrium hygroscopicity of soil materials increases first and then decreases with the increase of temperature,and the hygroscopicity reaches the maximum in the range of 20℃and 25℃.In low temperature environment,the effect of lower pairs on the moisture absorption of soil materials is relatively small,and the moisture absorption rate is relatively slow.When the ratio of soil-sand-stone is 28∶67∶6,the hygroscopic performance of the soil material is relatively poor(the minimum equilibrium moisture content is about 2.66%),while the ratio of soil-sand-stone is 45∶13∶42,the hygroscopic performance of the soil material is relatively good(the maximum equilibrium moisture content 3.95%).The small particle size and high component content of the soil material show better hygroscopic performance.In addition,data fitting method is used to analyze the prediction models of different hygrometric properties,and finally the influence of temperature factor on the predicted value is corrected,and the correlation coefficient between the correction coefficient and temperature is in line with the quadratic functionα=-0.0656t 2+0.4185t+0.3033,and the correlation coefficient is as high as 0.9354.The above conclusions provide a scientific and convenient method for the quantitative calculation of soil material balancing environmental temperature and humidity performance.

关 键 词：生土材料 粒径构成 平衡含湿量 吸湿速率 

分 类 号：TU502[建筑科学—建筑技术科学]