气凝胶涂料在水电工程中的应用  

Application of Aerogel Coating in Hydropower Engineering

作　　者：孙启佑 庞佳加 曹富俊 陈璐 SUN Qiyou;PANG Jiajia;CAO Fujun;CHEN Lu(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2024年第S02期136-138,共3页Yunnan Water Power

摘　　要：冬季混凝土因温度较低,混凝土中水泥水化反应减慢甚至停止,导致混凝土的强度增加缓慢或直接停止。当外界温度降低到0℃时,混凝土中的水开始结冰,逐渐由水变为冰,这时水泥水化作用减慢,混凝土强度增长相应变慢;当温度继续降低时,混凝土中的水完全变成冰,混凝土中水泥水化作用停止,此时混凝土的强度将不会再增长,但混凝土内部不受温度影响的部分继续进行水化作用,内部温度升高与混凝土外部受温度影响区域形成较大温差从而产生裂缝。因此,混凝土的保温在建筑工程中尤为重要。TB水电站采用气凝胶保温涂料对坝体进行保温,对混凝土进行保温养护,同时简化原有施工程序,减少了对混凝土面的破坏。In winter,due to the lower temperature of concrete,the hydration reaction of cement in concrete slows down or even stops,resulting in a slow or direct increase in concrete strength.When the external temperature drops to 0℃,the water in the concrete begins to freeze,gradually changing from water to ice.At this time,the hydration of cement slows down,and the growth of concrete strength correspondingly slows down.When the temperature continues to decrease,the water in the concrete completely turns into ice,and the hydration of cement in the concrete stops.At this point,the strength of the concrete will no longer increase,but the parts inside the concrete that are not affected by temperature will continue to undergo hydration.The increase in internal temperature will create a large temperature difference with the temperature affected areas outside the concrete,resulting in cracks.Therefore,the insulation of concrete is particularly important in construction projects.TB Hydropower Station uses aerogel thermal insulation coating to insulate the dam body and maintain the concrete.At the same time,it simplifies the original construction procedures and reduces the damage to the concrete surface.

关 键 词：水电工程 气凝胶 保温涂料 保温养护 

分 类 号：TM622[电气工程—电力系统及自动化] TV431[水利工程—水工结构工程]