第六期_2012_《混凝土與水泥制品》雜志社

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第六期

淺談預應力混凝土管樁施工監控要點

楊海榮1,2

2012年第6期

摘要

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摘??要：針對預應力混凝土管樁的特點，結合自身實踐經驗，提出了預應力混凝土管樁監理的工作依據及該類管樁在工程施工階段的監控項目、控制要點、注意事項等內容。Abstract:Accordingtothecharacteristicsofprestressedconcretepilesandcombiningwiththewriterownpracticeexperience,supervisionworkbasis,supervisionitems,supervisionpoints,pointsforattentionandsoonduringtheengineeringconstructionoftheprestressedconcretepilesareputforward.

復合膠材多孔錳渣保溫墻磚的干縮及水化機理研究

郭一鋒，陳平

２０12年第6期

摘要

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摘要：以適量硅灰與P·O 42.5水泥復合組成的膠材，與錳渣經過拌合、成型、養護等工序后，制得錳渣輕質保溫墻磚。通過強度、導熱系數的回歸分析，探討了錳渣墻磚的干縮機理；通過XRD與SEM分析，對比了新舊方案下錳渣復合材料的早期水化產物與微觀結構。 Abstract: The manganese slag lightweight insulation wall bricks are prepared through manganese slag and cementitious materials with silica fume and P·O 42.5 cement after mixing, molding and curing. Through the strength and thermal conductivity regression analysis, the drying shrinkage mechanism of the manganese slag wall bricks is discussed. And the hydration products at early age and microstructure of the manganese slag compound material are compared by XRD and SEM under the new and old schemes.

石灰－粉煤灰穩定煤矸石混合料抗壓強度試驗研究

孟文清，全建升，崔邯龍，張亞鵬

２０12年第6期

摘要

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摘??要：通過室內試驗，研究了邢臺某礦區煤矸石混合料的物理、化學性能。采用均勻設計方法，設計了6組煤矸石混合料的試驗配比方案，并分別對不同配合比的混合料進行飽水無側限抗壓強度試驗，利用回歸分析模型對試驗結果進行分析，研究討論摻合料（生石灰、粉煤灰）摻量對煤矸石混合料強度的影響。Abstract:ThephysicalandchemicalperformancesofcoalgangueintheXingtaiareaarestudiedbasedontheindoorexperiments.Byuniformdesignmethod,6groupsmixproportionschemesofcoalganguemixturesaredesigned.Andtheexperimentofcompressivestrengthwithfullwaterandnolateralrestraintiscarriedoutforthemixtureswithdifferentmixproportion.Usingtheregressionanalysismodel,theexperimentalresultsisanalyzed.Theinfluenceofthecontentsofadmixtures(quicklime,flyash)onthestrengthofthecoalganguemixtureisdiscussed.

鋼渣集料體積穩定性及其影響因素分析

權娟娟1，李翔2，張凱峰2

２０12年第6期

摘要

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摘??要：鋼渣的化學成分和礦物組成與水泥熟料相似，具有一定的水硬活性，尤其是壓碎值、磨耗率等性能突出，可作為碎石和砂的理想替代品。但鋼渣潛在的體積不穩定性卻制約著鋼渣的應用，針對這問題，提出了一些解決途徑，論述了其作為混凝土集料的應用可行性。Abstract:Steelslagissimilarwithcementinchemicalcompositionandmineralcomposition,andhassomehydrationactivity,especiallythehighperformanceofcrushingvalueandabrasionratio,whichcanusedasthesubstitutionofgravelandsandinconcrete.Buttheutilizationofsteelslagisrestrictedbythepotentialvolumeinstability.Aimingatthesteelslag’svolumestability,somesolutionsareproposed,andthefeasibilityofsteelslagasconcreteaggregateisdiscussed.

高壓注漿水泥-粉煤灰應用于煤層采空地基處理

溫艷芳1，寧連旺2

２０12年第6期

摘要

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摘要：以陽泉市某住宅工程為例，介紹了用高壓注漿方法處理煤層采空地基的施工技術和工藝。經檢測，高壓注漿應用于煤層采空地基的處理完全可滿足建筑承載力的要求 Abstract: Taking one residential project of Yangquan as an example, the construction technology and process of coal mined-out ground by high-pressure grouting method are introduced. Through the tests, the application of high-pressure grouting on coal mined-out ground can totally satisfy the requirement of building bearing capacity

機房隔振地坪施工技術

林強，程軍，王棟杰，黃凱

２０12年第6期

摘要

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摘要：以成都某工程為例，敘述了高層建筑中以隔振墊、離心玻璃棉和聲默圍邊隔聲墊為主要消能隔振材料的機房隔振地坪施工技術。該隔振地坪可使機電設備與建筑結構完全分開，能有效降低各類機電設備向外傳遞振動和噪聲。 Abstract: Taking one project in Chengdu as an example, the construction technology of room vibration isolation floor using vibration isolation pad, centrifugal glass wool and sound silence surrounding isolation pad as the main energy dissipation vibration isolation materials in high buildings is introduced. This vibration isolation floor can detach the electromechanical equipment and building structure completely, which can efficiently reduce the outward transmission vibration and noise of the electromechanical equipment.

飾面砂漿抗泛堿性能的研究

李光球，薛亮亮

２０12年第6期

摘要

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摘要：從膠凝材料的用量及其配比、乳膠粉的種類及其摻量、活性二氧化硅、泛堿抑制劑以及飾面砂漿表面噴涂有機硅憎水劑五個方面著手，對飾面砂漿的抗泛堿性進行了研究，提出了改善飾面砂漿抗泛堿性能的各種方案。 Abstract: From five aspects such as the amount and mixing ratio of cementitious materials, the type and dosage of polymer powders, activated silica, efflorescence inhibitor and facing mortar surface coating silicone water-repellent agent, the anti-universal-alkaline of facing mortar is studied and many solutions to improve the anti-universal-alkaline of facing mortar are put forward.

再生混凝土疊合板受彎力學性能試驗

朱永明1，高歌2，肖建莊2

２０12年第6期

摘要

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摘要：設計了3塊再生混凝土疊合板，配筋率分別為0.5%、1.0%、1.5%，預制部分采用普通混凝土，疊合部分采用100%再生粗骨料取代率的再生混凝土，疊合面采用人工粗糙面。另外設計了1塊整澆板，全部采用100%再生粗骨料取代率的再生混凝土，以進行對比試驗。通過受彎性能試驗，得到了撓度和裂縫發展規律以及破壞特征。試驗結果表明，再生混凝土疊合板的受彎力學性能和普通混凝土板受彎性能接近，其極限承載力可采用普通混凝土疊合板的計算方法進行計算。當配筋率不低于1%時，采用再生混凝土的彈性模量，按現有規范短期剛度公式計算的撓度乘以0.9的修正系數后仍適用于再生混凝土疊合板。 Abstract: Three recycled concrete composite slabs with reinforcement ratios of 0.5%, 1.0%, 1.5% are respectively designed. The prefabricated part is poured by conventional concrete while the cast-in-place part uses recycled concrete with 100% recycled coarse aggregates. In order to compare the experiment results with the conventional concrete slab, a unity recycled concrete slab with 100% recycled coarse aggregates is also designed. The midpoint deflections, distribution of the cracks and failure characteristics have been obtained through the bending performance test. The results show that the recycled concrete composite slabs behave similarly as the ordinary concrete slabs, the theory and design methods applied to the ordinary concrete slabs can also be suitable to the recycled concrete composite slabs. If the reinforcement ratio is not less than 1%, using the elastic modulus of recycled concrete, the deflection calculated according to the GB 50010-2002 can still be applied to the recycled concrete composite slabs after modified by a factor 0.9 .

粉煤灰與鋼纖維復合高性能道面混凝土試驗研

遲維勝，范珉，王曉龍

２０12年第6期

摘要

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摘要：采用粉煤灰和鋼纖維復合的技術路線，研究了粉煤灰等量取代、超量取代、水泥量不變的條件下對鋼纖維混凝土性能的影響。結果表明，粉煤灰和鋼纖維的摻入可提高道面混凝土的力學性能，改善混凝土的內部結構，并可降低道面混凝土的投資。 Abstract: Using the technique of mixing steel fiber with fly ash, the influences of fly ash on the performances of steel fiber concrete are studied when the fly ash as fine aggregate, replaces cement in the same or excessive quantity or when cement dosage does not change. The results show that the adding fly ash and steel fiber can improve the mechanical properties of pavement concrete, improve the internal structure of concrete and reduce the investment of pavement concret

纖維增強混凝土對剪壓柱塑性鉸形成影響的比較試驗

蔡傳國，韋忠瑄，楊緒普

２０12年第6期

摘要

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摘要：針對汶川地震中鋼筋混凝土結構出現大量脆性破壞，以改善抗震結構延性為研究目標，對7根具有相同截面和配筋、不同纖維品種和摻量的纖維增強混凝土結構柱進行了低周反復加載試驗，得到了框架柱的剪切荷載—位移曲線、骨架曲線以及各階段的荷載位移值。并據此分析了不同的纖維品種和摻量對混凝土柱延性的影響。試驗結果表明，纖維增強混凝土顯著改善了剪壓柱的延性，延緩了塑性鉸的產生。試驗數據比較說明，在承受剪壓的框架結構柱非線性變形過程中，鋼纖維混凝土具有最強的耗能能力，碳纖維混凝土對剪壓柱的水平延性提高幅度較大，合成纖維能有效延緩塑性鉸的出現，但是對柱端最大承載力提高幅度較小 Abstract: In view of the mass brittle failures of reinforced concrete constructions in Wenchuan earthquake, the ductility of constructions is selected to be the research object, and the cyclic loading experiments are carried out on 7 concrete shearing pressure columns with different fiber types and dosages but with same cross-section and reinforcements. After that, the shearing load-displacement curve and the skeleton curve of the frame column are attained, as well as the load-displacement value of each step. Based on these data, the effects of different fiber types and dosages on the ductility of concrete shearing pressure columns is analyzed. The results show that the ductility of fiber reinforced concrete structural columns is improved significantly and the production of plastic hinges is delayed. Experimental data show that in the nonlinear deformation process of shearing pressure column, the steel fiber reinforced concrete has the strongest energy dissipation capacity, the carbon fiber reinforced concrete can improve ductility of the column, the synthetic fiber can effectively delay the emergence of plastic hinges, but the maximum capacity to end-column improves less extent.

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