空心微珠在轻质发泡水泥保温板中应用技术研究  

Research on the Application Technology of Hollow Microspheres in Lightweight and High-strength Foam Cement Insulation Board

作　　者：张召 Zhang Zhao(Ganjiang New Area Urban Construction Technology Co.Ltd.,Jiujiang,Jiangxi 330300)

机构地区：[1]赣江新区城建科技有限公司,江西九江330300

出　　处：《江西建材》2024年第12期79-82,共4页

摘　　要：文中研究了空心微珠(一种空心无机轻集料)对发泡水泥保温板性能的影响。空心微珠的导热系数为0.035 W/(m·k),仅普通硅酸盐水泥的1/2,掺入空心微珠可降低发泡水泥保温板的导热系数。空心微珠兼具“吸水”效应和“滚珠”效应,掺量为0.5%时浆体流动度与空白组相当,流动度未降低,且有利于提高浆体的稳定性。掺入空心微珠后发泡水泥保温板的干密度逐渐降低,但抗压强度逐渐增加。掺0.1%、0.4%组干密度分别为162和159 kg/m^(3),比空白组分别降低了4.7%和6.5%;抗压强度分别为0.36和0.41 MPa,比空白组分别增加了0.03和0.08 MPa,掺0.4%组抗压强度增加显著;掺入空心微珠后,发泡水泥保温板导热系数先降低后增大,掺0.1%组导热系数为0.064 6 W/(m·k),与空白组相比降低了1.2%,掺0.4%组为0.066 7 W/(m·k),比空白组增加了2.0%,最终制备出了密度160 kg/m^(3)、抗压强度0.4 MPa、导热系数为0.064 6 W/(m·k)的轻质II型发泡水泥保温板。This article investigates the effect of hollow microspheres(a type of hollow inorganic lightweight aggregate)on the performance of foam cement insulation boards.The thermal conductivity of hollow microspheres is 0.035 W/(m·k),which is only half of that of ordinary Portland cement.Adding hollow microspheres can reduce the thermal conductivity of foam cement insulation boards.Hollow microspheres have both"water absorption"and"ball rolling"effects.When the dosage is 0.5%,the flowability of the slurry is comparable to that of the blank group,and the flowability is not reduced,which is beneficial for improving the stability of the slurry.After adding hollow microspheres,the dry density of the foam cement insulation board gradually decreases,but the compressive strength gradually increases.The dry densities of the 0.1%and 0.4%groups were 162 and 159 kg/m^(3),respectively,which decreased by 4.7%and 6.5%compared to the blank group;The compressive strengths were 0.36 and 0.41 MPa,respectively,which increased by 0.03 and 0.08 MPa compared to the blank group.The compressive strength of the 0.4%added group increased significantly;After adding hollow microspheres,the thermal conductivity of the foam cement insulation board first decreased and then increased.The thermal conductivity of the 0.1%group was 0.0646 W/(m·k),which was 1.2%lower than the blank group,and the 0.4%group was 0.0667 W/(m·k),which was 2.0%higher than the blank group.Finally,a lightweight and high-strength Type II foam cement insulation board with a density of 160 kg/m^(3),compressive strength of 0.4 MPa,and thermal conductivity of 0.0646 W/(m·k)was prepared.

关 键 词：空心微珠 发泡水泥保温板 干密度 抗压强度 导热系数 

分 类 号：TU528[建筑科学—建筑技术科学]