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    蘇州混凝土水泥制品研究院有限公司

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    第九期

    輸電線路用抗硫酸鹽C60塔基混凝土的研制及性能檢驗
    輸電線路用抗硫酸鹽C60塔基混凝土的研制及性能檢驗
    • 上官帖1,唐 囡1,郭 丹2,邱 靜2,路新瀛3
    2014年第9期
    摘要
    引用本文
    摘 要:針對西部鹽漬土輸電線路塔基耐久性問題,研制了抗硫酸鹽鹽漬土侵蝕的C60混凝土,通過所提出的室內烘凍實驗,檢驗了其抗蝕能力。結果表明,高抗滲C60混凝土在烘凍實驗條件下顯示出優異的抗蝕性能。 Abstract: C60 high performance concrete with low permeability and high resistance to sulfate attack is developed and tested by a formulated heating-freezing cycling test. The results show that the concrete designed with low permeability has excellent resistance to sulfate attack.
    免壓蒸預應力離心樁用C80高強混凝土抗凍融和抗硫酸鹽性能研究
    免壓蒸預應力離心樁用C80高強混凝土抗凍融和抗硫酸鹽性能研究
    • 王朝強1,2,譚克鋒1,2,朱建舟3,張韶華1,2,丁文文1,2
    2014年第9期
    摘要
    引用本文
    摘??要:為探索養護制度對采用水泥-硅灰-礦渣粉復合膠凝材料的C80樁用高強混凝土耐久性性能的影響規律,研究了不同養護條件下(蒸汽養護和標準養護)C80樁用高強混凝土抗凍融和抗硫酸鹽性能,并分析了不同蒸汽養護恒溫靜停時間對復合膠凝材料水化程度的影響。試驗結果表明,蒸汽養護能有效提高預應力離心樁用C80高強混凝土早期(28d)強度;標準養護下的預應力離心樁用C80高強混凝土抗凍融和抗硫酸鹽性能要優于蒸汽養護,其中水泥用量為400kg/m3,礦粉與硅灰互摻近1:1時,抗凍等級可達F450,抗硫酸鹽等級可達KS150以上;蒸汽養護最高恒溫不超過80℃對提高水泥基膠凝材料耐久性更加有利。Abstract:ToexploretheinfluenceofcuringsystemonthepermeabilityofC80high-strengthconcretewhichbasedoncement-silicafume-slagcompoundcementitiousmaterials,thedurabilityofC80high-strengthconcreteunderdifferentcuringconditions(steam-curingandstandardcuring)arestudied,andtheeffectofdifferentsteam-curingthermostaticrestperiodonthehydrationdegreeofcompoundcementitiousmaterialsisalsostudied.Theresultsshowthatsteam-curingispropitioustoincreasethestrengthofconcreteinearlyage(28d).Thefreezing-thawresistanceandsulfateresistanceofconcreteunderthestandardcuringissuperiortothesteam-curing,andthecementcontentin400kg/m3,mineralpowderandsilicafumemixedcloseto1:1,undertheseconditions,themechanicalpropertyandworkingperformanceofthenon-autoclavedC80concreteallmeetthestandardrequirements,thefrostresistancelevelcanreachF450,anti-sulfatecorrosionperformancelevelmorethanKS150.Inaddition,whenthehighestcuringtemperatureisbelow80℃,itismuchbetterfortheincreaseofimpermeabilityofcompoundcementitiousmaterials.
    再生EPS顆粒對磚粉泡沫混凝土性能影響的研究
    再生EPS顆粒對磚粉泡沫混凝土性能影響的研究
    • 董素芬,黃智德
    2014年第9期
    摘要
    引用本文
    摘??要:再生EPS顆粒表面粗糙,且多粒徑具有一定的級配,將其加入到廢棄微粉新體系泡沫混凝土中,可改善其性能,拓寬其利用渠道。研究了再生EPS顆粒對磚粉泡沫混凝土各項性能的影響。試驗結果表明,EPS的摻入使其干密度線性降低,摻量在4%~6%之間時,抗壓強度下降緩慢,含水率大幅度下降,抗碳化能力增強,抗凍融能力滿足規范要求,導熱系數減小。與通過增加泡沫用量獲得的同密度等級的磚粉泡沫混凝土相比,摻有再生EPS顆粒的混凝土抗壓強度提高,含水率和吸水率降低,性能較為優越。Abstract:RecycledEPSparticlesurfaceisrough,andhasmanyparticlesizesandacertaindistribution.Ifjoiningthewastepowdernewsystemfoamconcrete,rRecycledEPSparticlecanimproveitsperformance,andbroadenthechannelsforitsuse.InfluenceofrecycledEPSparticlesonbrickpowderfoamconcreteperformanceisstudied.TheexperimentalresultsshowthatEPSmakesdryingdensitydecreasinglinearly;whenEPScontentisbetween4%and6%,thecompressivestrengthdecreasesslowly;moisturecontentsdropslargelyandcarbonizationresistanceincreases;whenEPScontentismorethan4%,thecompressivestrengthafterfreezingandthawingcanmeetspecificationrequirements,butstrengthlossrateisgreaterthan20%;thermalconductivitycoefficientisreduced,butasEPScontentcontinuestoincrease,thereisnoobviouschange;comparedtothesamedensitybrickpowderfoamconcretewhichisgetbyincreasingthedosageofbubble,thecompressivestrengthofEPSconcreteincreases,moisturecontentandbibulousrateislower,andithasmoresuperiorperformance.
    阻銹劑與礦物摻合料對銹蝕混凝土修復砂漿的性能影響
    阻銹劑與礦物摻合料對銹蝕混凝土修復砂漿的性能影響
    • 李 翔1,2,3,韓 飛1,呂曉霞2,3,汪明天1,2,3,趙秋華2,3
    2014年第9期
    摘要
    引用本文
    摘 要:測試了水泥基砂漿的抗氯離子滲透性能及鋼筋砂漿電極的極化電位,研究了不同阻銹劑、礦物摻合料對砂漿抗氯鹽銹蝕性能的影響規律。結果表明,1.5%乙醇胺與0.5%三乙醇胺復摻,砂漿中鋼筋表現出優異的抗氯鹽銹蝕性能;摻入20%礦渣粉及10%粉煤灰,砂漿抗氯離子滲透性能優于其它各組;乙醇胺、三乙醇胺作復合阻銹劑,同時復摻礦渣粉、粉煤灰摻合料,復合砂漿的抗氯鹽銹蝕性能最佳,且對力學性能無明顯影響,適用于銹蝕混凝土結構的修復。 Abstract: The mortar resistance to chlorine ion permeability and polarization potential of reinforced mortar have been measured, the influence rules of mortar chlorine salt corrosion resistance by corrosion inhibitor and mineral admixtures are researched. The results show that the rebar in mortar presents excellent chlorine salt corrosion resistance when adding 1.5% ethanolamine and 0.5% triethanolamine; mortar specimen which compound mixing 20% slag and 10% fly ash, the chlorine salt erosion resistance property is superior to specimens which mixing cement, slag and fly ash separately. Taking ethanolamine and triethanolamine as compound corrosion inhibitor, double mixing slag and fly ash, chlorine salt corrosion resistance of compound mortar turns out the best property, and has no obvious effect on mechanical property, which can apply to repairing corrosion concrete structure.
    活性摻合料改善地下工程結構混凝土性能研究
    活性摻合料改善地下工程結構混凝土性能研究
    • 駱靜靜1,鄧建良1,王 涌2
    2014年第9期
    摘要
    引用本文
    摘 要:研究了普通混凝土、礦粉混凝土、硅灰混凝土以及復摻礦粉、硅灰混凝土的坍落度、抗壓強度和抗滲、抗硫酸鹽侵蝕性能。試驗結果表明,礦物摻合料可以明顯改善混凝土的性能,摻合料種類和摻入比例直接決定了混凝土性能的改善效果;且復摻礦粉、硅灰混凝土的性能優于單摻礦粉、單摻硅灰組;當礦粉摻量20%、硅灰摻量5%時,混凝土的抗壓強度、抗滲性能和抗硫酸鹽侵蝕性能最好。 Abstract: The performances of ordinary concrete and mineral admixtures concrete (slag, silicon ash, slag+silicon ash) are investigated, including the slump, the compressive strength, the impermeability and the performance of resistance to sulfate attack. The results show that mineral admixtures could improve the properties of concrete observably; composition ratio of mineral admixtures has influence on the improvement of concrete performance; the performance of multiple mineral admixtures concrete (slag and silicon ash) is superior to the single mineral admixture concrete(slag, silicon ash). When multiple mineral admixtures with 20% slag and 5% silicon ash is added to concrete, the best performances are obtained.
    基于緊密填充原理的機制砂超高強高性能混凝土的制備
    基于緊密填充原理的機制砂超高強高性能混凝土的制備
    • 劉永道1,陳 景1,林喜華2,劉其彬2
    2014年第9期
    摘要
    引用本文
    摘??要:采用緊密填充技術確定了機制砂超高強高性能混凝土的膠凝材料體系各組分及機制砂復合比例,研究了水膠比、膠凝材料總量對機制砂超高強高性能混凝土工作性和抗壓強度的影響。結果表明,選用優化后的復合材料體系,在普通原材料和攪拌工藝條件下可制備坍落度和擴展度分別為260mm和640mm以上,56d抗壓強度高達143.2MPa的機制砂超高強高性能混凝土;提高水膠比和膠材總量可顯著改善機制砂超高強高性能混凝土的工作性,但為了獲得較好工作性同時兼具超高強度,其水灰比宜為0.17,膠凝材料總量宜為750kg/m3。Abstract:Themassratiosofeachcomponentcementitiousmaterialandmachine-madesandinultrahighstrengthandperformanceconcreteareidentifiedbydensepackingtechnology.EffectsofW/Bandcementitiousmaterialcontentontheworkabilityandcompressivestrengthofultrahighstrengthandperformanceconcretewithmachine-madesandareinvestigated.Resultsshowthattheultrahighperformanceconcretewithslump/slumpflowupto260mm/640mmand143.2MPacompressivestrengthat56dayscouldbepreparedinnormalmaterialsandmixingprocesswhenusedtheoptimizedcompositematerials.Theworkabilityofultrahighperformanceconcretewithmachine-madesandincreasedwithincreasingW/Bandcementitiousmaterialcontent.Butinordertoensuretheworkabilityandcompressivestrengthofultrahighperformancemachine-madesandconcrete,W/Bshouldbe0.17andcementitiousmaterialcontentshouldbe750kg/m3。
    部分預應力混凝土電桿在10kV線路中的應用及配筋優化設計
    部分預應力混凝土電桿在10kV線路中的應用及配筋優化設計
    • 吳赤球,姚圣禹,呂 偉
    2014年第9期
    摘要
    引用本文
    摘 要:介紹了在10kV線路中如何選用合適彎矩的部分預應力電桿,以及對部分預應力電桿中的普通鋼筋進行優化設計,并對實際應用作了經濟分析。結果表明:通過優化設計,部分預應力電桿中普通鋼筋具有更好的經濟優勢。 Abstract: How to select the partially prestressed concrete with appropriate bending moment in the 10kv line and the optimization design of ordinary steel bar of the concrete pole are mainly introduced. Meanwhile, the economic analysis of its actual application is made. The results show that ordinary steel in the partially prestressed concrete pole has better economic advantage by optimizing design.
    下沉法排水箱涵構造、制作及施工方法
    下沉法排水箱涵構造、制作及施工方法
    • 蘇國宏,黎曉林,劉建華
    2014年第9期
    摘要
    引用本文
    摘 要:介紹了下沉法箱涵的構造、結構設計、制作方法,并對該類箱涵采用逆作法與沉井工藝相結合的施工方法作了介紹。 Abstract: The structure, the structure design and manufacture of box culvert for the sinking method are introduced. And through the analysis of the feasibility of sinking method for the box culvert, the construction method of top-down method combined with process of open caisson is applied to sinking construction of the box culvert.
    靜壓PHC管樁穿越較厚粉砂夾層應用技術研究
    靜壓PHC管樁穿越較厚粉砂夾層應用技術研究
    • 王 雷,崔建軍,王誠杰
    2014年第9期
    摘要
    引用本文
    摘 要:為解決在較厚粉砂夾層及硬層等特殊地質條件下應用靜壓法沉樁會出現爆樁、沉樁困難等問題,結合工程實例,提出了三種解決方案。通過對技術、經濟、工期進行對比論證得出,提高管樁樁身抗壓承載力的方式為最優選擇。經檢測,管樁各項技術指標均滿足設計要求。 Abstract: It occurs blasting piles, settlement difficulties of pile or other issues on special geological conditions of thick silty sand dissection and hard formation by using the static pressure method. According to the problems motioned above, three kinds of solutions are put forward combined with engineering examples. Through contrastive demonstrating of the technology, economy and progress, it can be drawn that the method of strengthen the pipe in order to improve the compression bearing capacity of the pile body is the best choice. And the test results show that the piles can meet the design requirements of the technical indicators.
    豎向荷載下樁承載變形性能的數值分析
    豎向荷載下樁承載變形性能的數值分析
    • 趙曉蕾
    2014年第9期
    摘要
    引用本文
    摘 要:為了更好地反映工程中樁土實際工作性狀,使樁基礎基本性能在施工前得到合理的預測,以便更好地指導樁基礎的施工,利用數值模擬軟件對某基樁工程中樁基礎在施工過程中的承載性能進行分析,得到了單樁荷載-沉降曲線。并與實際工程測出的結果作了對比,同時,探討了在改變樁徑和樁長這兩種因素的情況下,其對樁身軸力、側摩阻力及整體沉降的影響。 Abstract: In order to reflect the actual working-character of piles-soil in the engineering and obtain reasonable prediction for basic performance before the construction of pile foundation so as to guide the construction of pile foundation, the bearing capacity and deformation of the pile foundation in the construction are analyzed by using numerical simulation software and the single pile load-settlement curve compared with the actual result is got. In addition, the influence of the diameter and length on the axial force of pile, pile side friction and the whole settlement are studied.
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