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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第五期

    利用未淡化海砂配制超高性能混凝土的研究
    利用未淡化海砂配制超高性能混凝土的研究
    • 王 晶,倪博文,周永祥,宋普濤,王祖琦,冷發光
    2019年第5期
    摘要
    引用本文
    摘 要:利用未經淡化處理的海砂配制了超高性能混凝土(UHPC),并研究了不同水膠比、砂膠比、膠凝材料體系、鋼纖維摻量、養護制度對海砂UHPC的流動度、抗壓強度、抗折強度的影響。試驗結果表明:海砂UHPC的最優水膠比、砂膠比和纖維體積摻量分別為0.16、1.0和1.5%,最佳的膠凝材料體系組成是水泥、降黏劑和硅灰分別70%、15%和15%,最合適的熱養護制度是70 ℃蒸汽養護;按照上述參數配制的海砂UHPC力學性能完全符合相關標準的要求。 Abstract: Ultra-high performance concrete (UHPC) was prepared by mixing with untreated sea sand, and the effect of different W/B, sand-binder ratio, cementitious systems, steel fiber volume contents, curing schedules on the fluidity, compressive strength and flexural strength of UHPC with untreated sea sand are studied. The results show that: the optimum W/B, sand-binder ratio and steel fiber volume content of UHPC made with untreated sea sand are 0.16, 1.0 and 1.5% respectively; the optimum cementitious system is composed of 70% cement, 15% viscosity reducer, and 15% silica fume; the most suitable curing schedule is steam curing in the temperature of 70 ℃; and according to the above parameters, the mechanical property of UHPC with untreated sea sand can meet the requirements of current national standard.
    王晶,倪博文,周永祥,等.利用未淡化海砂配制超高性能混凝土的研究[J].混凝土與水泥制品,2019(5):1-4. WANG J,NI B W,ZHOU Y X,et al.Study on Ultra-high Performance Concrete Used by Untreated Sea Sand[J].China Concrete and Cement Products,2019(5):1-4.
    三元膠凝體系清水混凝土性能的試驗研究
    三元膠凝體系清水混凝土性能的試驗研究
    • 劉 剛,張曉樂,李維洲,谷坤鵬,胡 楠
    2019年第5期
    摘要
    引用本文
    摘 要:采用混料試驗設計方法研究了水泥、礦粉、粉煤灰三元膠凝體系新拌清水混凝土坍落度、倒筒排空時間以及7 d抗壓強度的變化規律。研究結果表明,模型精度的方差分析處于十分顯著水平(p≤0.01),能夠對實際情況進行預測;隨著粉煤灰摻量的增加,混凝土坍落度增加,倒筒排空時間減少,在粉煤灰摻量10%、礦粉摻量25%的條件下,混凝土工作性達到最佳水平;礦粉的加入會增加倒筒排空時間,提高混凝土屈服應力,不利于清水混凝土外觀改善,但礦粉具有較高的活性,對清水混凝土7 d強度有一定提升。 Abstract: Using mixture experiment design, the variation of concrete slump flow(SP), emptying time of inverted slump cone(ETISC) and 7 d compressive strength in a ternary cementing system are studied. The results indicate that mathematical model built is statistically significant(p≤0.01) through the analysis of variance(ANOVA), thus it is applicable for predicting the actual situation; with the increase of fly ash(FA) content, the SP increases and the ETISC decreases, the optimum mix amount of FA and slag is 10%, 20%, respectively. The addition of slag will increase the ETISC and yield stress of concrete, which is not conducive to improve the appearance of fair-faced concrete, but slag has a beneficial effect on the 7 d compressive strength of the concrete for its higher activity.
    劉剛,張曉樂,李維洲,等.三元膠凝體系清水混凝土性能的試驗研究[J].混凝土與水泥制品,2019(5):5-8. LIU G,ZHANG X L,LI W Z,et al.Experimental Research on Properties of Fair-faced Concrete in a Ternary Cementing System[J].China Concrete and Cement Products,2019(5):5-8.
    鹽凍環境下氧化石墨烯混凝土力學損傷試驗研究
    鹽凍環境下氧化石墨烯混凝土力學損傷試驗研究
    • 徐義洪1,2,范穎芳1
    2019年第5期
    摘要
    引用本文
    摘??要:為了研究鹽凍循環作用對氧化石墨烯(GO)混凝土力學性能的影響,分別對GO混凝土進行0、50、100、150、200次快速凍融循環,對經歷不同鹽凍循環的試件進行了單軸壓縮試驗,研究了鹽凍循環后試件的質量變化和應力-應變曲線等的變化規律,在此基礎上分析了鹽凍循環作用下,GO混凝土材料的損傷劣化機制。結果表明:隨著鹽凍次數的增加,GO混凝土劣化模式表現為砂漿脫落、微裂紋擴展、剝蝕和塊狀脫落等多種形式相結合;試件的應力-應變曲線隨著鹽凍次數的增加趨于扁平,峰值應力逐漸減小,峰值應變逐漸增加,彈性模量顯著減??;此外,GO混凝土鹽凍損傷變量與凍融循環次數呈良好的指數關系。Abstract:Inordertostudytheeffectofsaltfreezingcycleonthemechanicalbehaviorofgrapheneoxideconcrete,theuniaxialcompressionexperimentswerecarriedoutafter0,50,100,150and200cyclesofthefreezingandthawing.Thespecimenofqualitychange,mechanicalcharacteristicsofmaterialssuchasstress-straincurveandsoonwereanalyzed,andthedamagedegradationmechanismofgrapheneoxideconcreteinsaltfreezingcyclewassystematicallystudied.Theresultsshowthatthedamagedegradationmodelofgrapheneoxideconcreteduetosaltfreezingcyclepresentsdiversity,withtheincreaseofsaltfreezingcycletimes,mortargraduallyshedfromsamplesurface,micro-cracksappearandpropagationcombiningdenudationandblockfalling.Meanwhilethemorethetimesofsaltfreezingcycle,thereductionofthepeakstressandtheelasticmodulus,theincreaseofthepeakstrain,sothestress-straincurvesofthespecimenstendtobeflat.Inaddition,thedamagevariableofgrapheneoxideconcreteandthefreeze-thawcycleshaveagoodexponentialrelationship.
    徐義洪,范穎芳.鹽凍環境下氧化石墨烯混凝土力學損傷試驗研究[J].混凝土與水泥制品,2019(5):9-12+18. XU Y H,FAN Y F.Experimental Study on Mechanical Damage of Grapheme Oxide Concrete under the Salt Freezing Environment[J].China Concrete and Cement Products,2019(5):9-12+18.
    納米MgO對水泥基材料性能影響研究進展
    納米MgO對水泥基材料性能影響研究進展
    • 周 磊1,王有志1,章國寧2,張封平1
    2019年第5期
    摘要
    引用本文
    摘??要:結合國內外最新研究成果,綜述了納米MgO對水泥基材料的工作性、力學性能、孔結構、耐久性能及收縮膨脹特性的影響,分析了納米MgO水泥基材料的收縮膨脹機理。并針對當前研究的不足,提出了進一步研究方向,為后續納米MgO的應用研究提供借鑒。Abstract:Basedonrelatedresearchathomeandabroad,theinfluenceofnano-MgOonworkability,mechnicalproperties,porestructure,durability,especiallytheshrinkageandexpansionpropertiesofcement-basedmaterialswereintroducedandthemechanismofshrinkageandexpansionwassummarized.Aimingatthedeficiencyofcurrentrearch,thefurtherresearchdirectionswereputforwardtoprovideareferencetoresearchofnano-MgO.
    周磊,王有志,章國寧,等.納米MgO對水泥基材料性能影響研究進展[J].混凝土與水泥制品,2019(5):13-18. ZHOU L,WANG Y Z,ZHANG G N,et al.Research Progress of the Influence of Nano-MgO on Performance of Cement-based Materials[J].China Concrete and Cement Products,2019(5):13-18.
    釩鈦磁鐵尾礦微粉在混凝土中的應用研究
    釩鈦磁鐵尾礦微粉在混凝土中的應用研究
    • 王春陽1,2,鄭永超1,李 勝1,陳旭峰1,吝曉然1,3
    2019年第5期
    摘要
    引用本文
    摘 要:利用釩鈦磁鐵尾礦經粉磨后制備的尾礦微粉,其活性指數低于粉煤灰和礦粉。使用比表面積約為450 m2/kg的釩鈦磁鐵尾礦粉進行了C30強度等級混凝土試配及性能測試。試驗結果表明,釩鈦磁鐵尾礦微粉的替代率在45 kg以下時,對混凝土的工作性、力學性能及體積穩定性影響不大,且長齡期混凝土強度增量較高。 Abstract: The tailings fine powder was prepared by grinding the vanadium-titanium magnet tailings. The test results show that the activity index was lower than that of fly ash and slag powder, and the C30 concrete with tailings powder with a specific surface area of about 450 m2/kg was prepared and the properties tests are carried out. The test results show that when the replacement of tailings fine powder is less than 45 kg, it has little effect on workability, mechanical properties and stability of concrete, and the tailings fine powder can obviously improve the strength of concrete in the long-term.
    王春陽,鄭永超,李勝,等.釩鈦磁鐵尾礦微粉在混凝土中的應用研究[J].混凝土與水泥制品,2019(5):19-21+30. WANG C Y,ZHENG Y C,LI S,et al.Application Stud y on Vanadium-titanium Magnet Tailings Fine Powder in Concrete[J].China Concrete and Cement Products,2019(5):19-21+30.
    鹽堿-凍融環境下橋梁用混凝土耐久性分析
    鹽堿-凍融環境下橋梁用混凝土耐久性分析
    • 李彥軍
    2019年第5期
    摘要
    引用本文
    摘??要:我國“三北地區”橋墩基礎長期處于鹽堿凍融環境,嚴重影響了橋墩基礎混凝土的耐久性。以1%、2%、4%和6%的Na2SO4、NaCl和Na2SO4+NaCl作為腐蝕溶液,進行了最大凍融循環120次的不同配比粉煤灰混凝土長期性能室內試驗,分析了腐蝕溶液、腐蝕溶液濃度、凍融循環次數、水灰比和粉煤灰摻量等因素對粉煤灰混凝土質量損失率和動彈性模量變化率的影響規律。研究結果表明:①相同條件下,溶液對粉煤灰混凝土的質量損失率和動彈模變化率的腐蝕作用:Na2SO4+NaCl>NaCl>Na2SO4;②粉煤灰混凝土的質量會在硫酸鈉溶液中出現凍融前期增加而后期損失加劇的現象;③粉煤灰混凝土鹽堿凍融循環過程中的質量損失和彈性模量減小隨水膠比的增大而增大;④粉煤灰混凝土的質量損失率和動彈模變化率均隨粉煤灰摻量呈現出減小的趨勢。Abstract:Salinelandiswidelydistributedin“Three-NorthArea”ofChina.Salinecorrosionandfreeze-thawcyclesseriouslyaffectthedurabilityofconcrete.Basedon1%,2%,4%and6%Corrosionsolutionof?Na2SO4,NaCland?Na2SO4+NaCl,thelong-termperformanceindoortestsofflyashconcretewithmaximumfreeze-thawcycle120timeswereconducted.Theinfluencelawsofdifferentcorrosionsolutions,concentrationofcorrosionsolution,freeze-thawcycletimes,W/Candflyashcontentonthemasslossrateanddynamicelasticmoduluschangerateofflyashconcretewereanalyzed.Theresultsshowthat:①underthesameconditions,theeffectorderofthesolutiononthemasslossrateandthedynamicmoduluschangerateofflyashconcrete:?Na2SO4+NaCl>NaCl>Na2SO4;②thequalityofflyashconcreteincreasesintheearlyfreezing-thawingperiodanddecreasesinthelatefreezing-thawingperiod;③themasslossandelasticmodulusdecreaseofflyashconcretewiththeincreaseofW/Bintheprocessofsaline-alkalifreeze-thawcycle;④themasslossrateandthedynamicmoduluschangerateofflyashconcreteshowanexponentialdecreasingtrendwiththeincreaseoftheflyashcontent.
    李彥軍.鹽堿-凍融環境下橋梁用混凝土耐久性分析[J].混凝土與水泥制品,2019(5):22-25. LI Y J.Analysis on Durability of Concrete Used in Bridge under Saline-alkali Freeze-thaw Environment[J].China Concrete and Cement Products,2019(5):22-25.
    大摻量礦物摻合料對鋁酸鹽水泥漿體性能的影響
    大摻量礦物摻合料對鋁酸鹽水泥漿體性能的影響
    • 袁正夏,廖宜順,沈 晴,陳 磊,廖國勝
    2019年第5期
    摘要
    引用本文
    摘??要:研究了大摻量礦物摻合料與鋁酸鹽水泥復合漿體的抗壓強度、電阻率、化學收縮和XRD的變化規律。結果表明,在淡水和海水環境下,一定量(40%以內)礦渣的摻入有利于促進鋁酸鹽水泥強度的發展,有效抑制了鋁酸鹽水泥后期強度倒縮;礦物摻合料可提高鋁酸鹽水泥抗海水侵蝕性能;鋁酸鹽水泥漿體的電阻率與化學收縮之間存在良好的相關性,水泥漿體的電阻率和化學收縮隨著礦物摻合料摻量的增大而減??;在水化早期,礦渣和粉煤灰均未參與鋁酸鹽水泥的水化過程;礦渣在后期生成穩定的水化產物C2ASH8,其抑制晶相轉變的效果較粉煤灰更為顯著。Abstract:Theeffectofhigh-volumemineraladmixtureonthecompressivestrength,electricalresistivitychemicalshrinkage,XRDofcalciumaluminatecementwereinvestigated.Theresultsshowthattheincorporationofacertainamount(within40%)ofslagisbeneficialtopromotethestrengthdevelopmentandinhibitthelatestrengthdecreasingofcalciumaluminatecementinfreshwaterandseawaterenvironments.Addingmineraladmixturesisaneffectivewaytoimprovethecorrosionresistanceofaluminatecementinseawater.Thebelectricalresistivityandchemicalshrinkageofaluminatecementpasteexistsagoodcorrelation,theelectricalresistivityandchemicalshrinkageofcementpastedecreasewiththeincreaseofmineraladmixture.Intheearlystageofhydration,slagandflyasharenotparticipateinthehydrationprocessofcalciumaluminatecement.Theslagpromotestheformationofstablehydrationproduct?C2ASH8,therefore,ithasbettereffectofinhibitingcrystalphasetransformationthanflyash.
    袁正夏,廖宜順,沈晴,等.大摻量礦物摻合料對鋁酸鹽水泥漿體性能的影響[J].混凝土與水泥制品,2019(5):26-30. YUAN Z X,LIAO Y S,SHEN Q,et al.The Influence of High-volume Mineral Admixture on Performance of Calcium Aluminate Cement Paste[J].China Concrete and Cement Products,2019(5):26-30.
    預應力鋼絞線在大直徑管樁中的應用研究
    預應力鋼絞線在大直徑管樁中的應用研究
    • 焦守增1,張躍輝2
    2019年第5期
    摘要
    引用本文
    摘 要:在現有大直接管樁樁型基礎上,采用新型鋼絞線和增大單股鋼絞線直徑的方法制作了5根大直徑管樁,分別進行了抗疲勞性能、抗彎性能、預應力損失和握裹力試驗研究。結果表明,所制作的5根管樁的預應力張拉值、預應力傳遞長度、開裂彎矩、破壞彎矩均滿足相關規范要求。 Abstract: Five different type of piles are made by using new steel strand or increasing the diameter of single strand steel strand on the basis of the existing large concrere pile type. The fatigue test, bending performance research, prestress loss research and grip wrapping force test of these type of piles are carried out. The results show that the prestressing tension value, prestressing transfer length, cracking moment and failure moment all meet the requirements of relevant codes.
    焦守增,張躍輝.預應力鋼絞線在大直徑管樁中的應用研究[J].混凝土與水泥制品,2019(5):31-35. JIAO S Z,ZHANG Y H.Application Research of Prestressed Steel Strands in Large-diameter Piles[J].China Concrete and Cement Products,2019(5):31-35.
    預應力鋼筒混凝土管損傷破壞及防治措施
    預應力鋼筒混凝土管損傷破壞及防治措施
    • 張海鵬1,程冰清2,3,竇鐵生2,3,趙麗君2,3,董曉農2,3
    2019年第5期
    摘要
    引用本文
    摘 要:由于預應力鋼筒混凝土管(PCCP)具有耐久性、抗老化、防腐性能好等優點,近幾年在國內大型引水、調水工程中得到了廣泛應用。但隨著使用年限的增加,管道發生損傷破壞的風險也會增加。無論是設計、制造、運行等環節出現問題,都可能對PCCP正常運行造成安全隱患。本文總結了美國PCCP破壞樣本統計數據,對PCCP各環節可能的破壞原因進行了分析,歸納了針對性的保護措施,可為管道的安全評價和修復/更換方案提供參考。 Abstract: As PCCP has excellent qualities, such as durability, anti-aging and anti-corrosion performance, in recent years, it is widely used in large-scale water diversion projects in China. But like other pipes, with its service life increasing, the risk of damage to pipelines increases too. Whether there is a problem in each part, such as design, manufacturing, inspection, operation, etc., it may cause safety hazards to the normal operation of PCCP. To provide a reference for pipeline safety evaluation and repair/replacement solutions, the PCCP failure sample statistics are summarized, the causes of PCCP damage from each part are analyzed and the corresponding effective measures to prevent PCCP damage are concluded.
    張海鵬,程冰清,竇鐵生,等.預應力鋼筒混凝土管損傷破壞及防治措施[J].混凝土與水泥制品,2019(5):36-39. ZHANG H P,CHENG B Q,DOU T S,et al.Damage and Prevention Measure of Prestressed Concrete Cylinder Pipe (PCCP)[J].China Concrete and Cement Products,2019(5):36-39.
    農田水利裝配式混凝土渠道應用技術研究綜述
    農田水利裝配式混凝土渠道應用技術研究綜述
    • 劉長順1,鄭 磊2,張景奎1,梁 建1,徐 良1
    2019年第5期
    摘要
    引用本文
    摘 要:從配合比設計、結構設計、生產工藝、施工工藝以及質量控制等方面闡述了田間裝配式混凝土渠道應用技術的研究現狀,指出了目前工程應用中存在的問題及今后的研究方向,可為田間裝配式混凝土渠道相關產品的研發與應用提供技術參考。 Abstract: From the aspects of mix design, structural design, production process, construction process and quality control, the research status of domestic field assembly channel application technology is expounded, and the problems existing in the current engineering application and future research directions are pointed out, which could provide technical reference for the development and application of channel related products.
    劉長順,鄭磊,張景奎,等.農田水利裝配式混凝土渠道應用技術研究綜述[J].混凝土與水泥制品,2019(5):40-43+53. LIU C S,ZHENG L,ZHANG J K,et al.Study Review of Application Technology of Field Assembly Channel[J].China Concrete and Cement Products,2019(5):40-43+53.
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