【摘要】 为了进一步改善矿井隔热混凝土的隔热性能,节约能源,目前的研究工作旨在利用1种可循环再生的绿色有机物——麦秆纤维,开发出具有更好的隔热与支撑性能的环保型矿用隔热混凝土;对麦秆纤维进行扫描电子显微镜观察,发现其存在大量的封闭微孔结构,是1种良好的隔热材料;将麦秆纤维以水泥质量的不同百分比(0%、2%、4%、6%、8%、10%)掺加到矿井隔热砂浆中,研制出的隔热混凝土导热系数逐渐降低,最终维持在0.201 0～0.200 2 W/(m·K);抗压强度先增高后降低,最大抗压强度为7.14 MPa。优选方案是掺加2%的麦秆纤维,与未掺加麦秆纤维的隔热混凝土相比,隔热性能与抗压强度都得到提升,隔热性能提升7.5%,抗压强度提升5.9%。更多还原

【Abstract】 To improve the thermal insulation performance of thermal insulation concrete for mining and save energy, we developed an environmentally friendly thermal insulation concrete with better thermal insulation and performance using a recyclable green organic matter wheat straw fiber. Scanning electron microscopy of the wheat straw fiber revealed that it had a large number of closed microporous structures, which are good heat insulation materials. Different percentages of wheat straw fibers(0%, 2%, 4%,6%, 8%, 10%) and cement quality were mixed into the thermal insulation mortar, and the thermal conductivity of the thermal insulation concrete gradually decreased. When maintained at 0.201 0-0.200 2 W/（m·K）, the compressive strength first increased and then decreased, and the maximum compressive strength was 7.14 MPa. Adding 2% of wheat straw fiber can improve the thermal insulation performance and compressive strength. Compared with the heat-insulation concrete without straw fiber, the heat-insulation property and compressive strength are improved, and the heat-insulation property and compressive strength are increased 7.5% and 5.9% respectively.更多还原