CAJ | 학술논문

针对胶凝砂砾石坝体材料和新型保护层材料抗渗和抗冻性能展开了试验研究,其中抗冻测试中引入气冻和冰冻两种测试手段以表征胶凝砂砾石抵抗冻融和温度循环的能力.结果表明,未掺加外加剂的胶凝砂砾石180d龄期抗渗可达到W8,90d龄期抗冰冻不足25次冻融循环,气冻350次温度循环后相对动弹性模量仍约65%,抗气冻可到600次以上温度循环.掺加外加剂的胶凝砂砾石相应龄期的抗渗为W12,抗冰冻达75次冻融循环,气冻350次温度循环后相对动弹性模量仍有80%以上.因此建议胶凝砂砾石中采用外加剂,并以长龄期180d为设计龄期.新型保护层材料的研发试验表明,变态胶凝砂砾石、富浆胶凝砂砾石均具有良好的防渗(抗渗等级W10以上)和抗冻能力(F300次冻融循环),可作为胶凝砂砾石坝上、下游防渗抗冻保护层材料.
침대효응사력석패체재료화신형보호층재료항삼화항동성능전개료시험연구,기중항동측시중인입기동화빙동량충측시수단이표정효응사력석저항동융화온도순배적능력.결과표명,미참가외가제적효응사력석180d령기항삼가체도W8,90d령기항빙동불족25차동융순배,기동350차온도순배후상대동탄성모량잉약65%,항기동가도600차이상온도순배.참가외가제적효응사력석상응령기적항삼위W12,항빙동체75차동융순배,기동350차온도순배후상대동탄성모량잉유80%이상.인차건의효응사력석중채용외가제,병이장령기180d위설계령기.신형보호층재료적연발시험표명,변태효응사력석、부장효응사력석균구유량호적방삼(항삼등급W10이상)화항동능력(F300차동융순배),가작위효응사력석패상、하유방삼항동보호층재료.
A series of experiments were made to test the frost-resistance (including frost-resistance in air and frost-resistance in water) and impermeability of CSG and a new type of protective materials. Results show that the impermeability level of CSG without additive cured for 180d can reach W8, and the CSG cure for 90d was destroyed in less than 25 freezing-thawing cycles in water while was not destroyed in over 600 cycles in air. For the CSG with additive,the impermeability level at 180d can reach W12,and it was destroyed in over than 75 freezing-thawing cycles in water while was not destroyed in over 350 cy?cles in air. Therefore additive is recommended in CSG mixing design. Tests on a new type of protective ma?terials show that CSG adding grout and CSG with more cementitious materials both have good impermeabili?ty levels (over W10) and frost-resistance (F300) and can be used as protective layers in CSG dams.