—38—2023年第5期黑龙江水利科技No.5.2023(第51卷)HeilongjiangHydraulicScienceandTechnology(TotalNo.51)文章编号:1007-7596(2023)05-0001-04[收稿日期]2022-03-21[作者简介]唐强(1966-),男,辽宁庄河人,工程师,研究方向为水利工程管理、河道、水资源、水土保持、农村饮水安全等。不同粉煤灰掺量及水胶比水工混凝土的耐久性分析唐强(大连市庄河市鞍子山乡人民政府水利站,辽宁庄河116414)摘要:根据东北地区气候环境特征,试验设计3种粉煤灰掺量及水胶比,通过模拟设计现场侵蚀条件试验探讨不同粉煤灰掺量及水胶比水工混凝土耐久性。结果表明:不同侵蚀环境的作用机理存在明显差异,自然浸泡、冻融循环条件下以化学腐蚀和物理破坏为主,干湿循环与硫酸盐侵蚀耦合作用会引起一系列物理化学反应;各类侵蚀环境下,掺20%粉煤灰+0.30水胶比试块的耐久性最优,硫酸盐溶液中水泥水化生成钙矾石,这种膨胀产物会产生一定的膨胀压力。关键词:粉煤灰掺量;水胶比;侵蚀环境;水工混凝土中图分类号:TV431文献标识码:BDurabilityAnalysisofHydraulicConcretewithDifferentFlyAshContentandWater-binderRatioTangQiang(ZhuangheUrbanWaterConservancyStationofAnzishanVillagePeople’sGovernment,Zhuanghe116414,China)Abstract:AccordingtotheclimaticandenvironmentalcharacteristicsofnortheastChina,threekindsofflyashcontentandwater-binderratioweredesigned,andthedurabilityofhydraulicconcretewithdifferentflyashcontentandwater-binderratiowasdiscussedthroughthefielderosionconditiontestofsimulateddesign.Theresultsshowthatthereareobviousdifferencesintheactionmechanismofdifferenterosionenvironments,undernaturalsoakingandfreeze-thawcycles,chemicalcorrosionandphysicaldamagearethemainfactors,andthecouplingofdry-wetcycleandsulfateerosionwillcauseaseriesofphysicalandchemicalreactions.Invariouserosionenvironments,thedurabilityoftheblockmixedwith20%flyash+0.30waterglueisthebest,thecementinsulfatesolutionishydratedtoformettringite,andthisswellingproductwillproducecertainswellingpressure.Keywords:flyashreplacement;water-blinderratio;erosionenvironment;hydraulicconcrete中国东北盐渍土地区水工混凝土结构,受各种不利因素作用很容易出现劣化损伤,其中导致工程结构提前失去服役...