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- 2018
高石蜡掺量相变水泥基复合材料的性能
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Abstract:
为了提高相变水泥基复合材料中相变材料石蜡的掺量，引入造孔剂在基体中产生气孔，使部分石蜡填充到气孔中，增加液化石蜡的存储空间，减少石蜡渗出。研究了不同造孔剂掺量下石蜡含量对相变水泥基复合材料抗石蜡渗出性、力学性能和储热性能的影响规律。结果表明：当造孔剂掺量（与水泥基复合材料质量比）由0%提高至4%时，石蜡在相变水泥基复合材料中不渗漏的掺量（与水泥基复合材料质量比）由5.0%提高至7.2%，抗压强度降低幅度较大。造孔剂和石蜡的最佳掺量分别为2%和5.8%。随着石蜡掺量的增加，相变水泥基复合材料储热性能提高，同时，造孔剂产生的气孔隔热保温效果也有助于相变水泥基复合材料板外壁和内壁最高温度温差的增加及测量体系内腔最高温度的下降。 For increasing the dosage of paraffin in phase change cementitious composites, the pore forming agent (PFA) was mixed with phase change cementitious composites, in which a part of paraffin was filled into the pores produced by the PFA. The effects of different dosages of paraffin and PFA on the paraffin leakage, mechanical properties and thermal storage performance of phase change cementitious composites were studied. The results show that the dosage of paraffin in the phase change cementitious composites increases from 5.0% to 7.2% and the compressive strength decreases sharply with the content of PFA increasing from 0% to 4%. The optimum dosages of PFA and paraffin are 2% and 5.8%, respectively. The heat storage performance of phase change cementitious composites is enhanced with the increase of paraffin content. In addition, the thermal insulation effect of pores also contributes to the increase of the maximum temperature difference between the outer and inner wall of phase change cementitious composites plate and the decrease of the maximum temperature of the cavity in the measurement system. 太阳能高效利用湖北省协同创新中心开放基金（HBSKFMS2014025）；太阳能高效利用湖北省协同创新中心大学生创新基金（HBSDY201505）；绿色轻工材料湖北省重点实验室开放基金（201611B13）
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