Phase-change temperature-control controllable low-strength material for heat supply pipeline backfilling and preparation method of phase-change temperature-control controllable low-strength material

• Main Authors: JIA CHAOXIA, ZHANG ZHIBIN, FENG XIAO, LIANG YUNPENG, KONG XIANGHUI, WANG GAOQIANG, ZHANG YANHAO, ZHAO QUANMAN
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to a phase-change temperature-control controllable low-strength material for heat supply pipeline backfilling and a preparation method of the phase-change temperature-control controllable low-strength material. Comprising fine aggregate, cement and water in a mass ratio of (75-90): (5-22): (42-55), the fine aggregate comprises dredged sediment and a composite phase change material in a mass ratio of (70-85): (3-9), and the composite phase change material is composed of rice hull ash and paraffin in a mass ratio of (2-3): (1-6). The phase change material is introduced into the preparation of the controllable low-strength material, so that the material has phase change temperature control performance, heat diffusion is effectively prevented, and the temperature change of soil around the pipeline is stabilized. 本发明涉及一种用于供热管道回填的相变控温可控性低强度材料及其制备方法。包括质量比为75-90:5～22:42-55的细集料、水泥和水，细集料包括质量比为70-85:3-9的疏浚底泥和复合相变材料，复合相变材料由质量比为2-3:1-6的稻壳灰和石蜡组成。将相变材料引入到可控性低强度材料的制备中，使材料具有相变控温性能，有效阻止热量扩散，稳定管道周围土壤温度变化。