第四期_2011_《混凝土與水泥制品》雜志社

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第四期

沈陽皇朝萬鑫大廈鋼管混凝土施工技術

尹素花1，董迎娜2，常建立1

２０11年第4期

摘要

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摘要：萬鑫大廈鋼管混凝土結構由40根鋼管組成，高約65.5 m，按樓層進行分段。針對該工程鋼管混凝土結構建筑物高、混凝土泵送難及施工中容易出現堵管、爆管和混凝土養護等特點，重點介紹了克服難點所采取的技術措施及施工方案。 Abstract: The steel tube concrete structure of Wanxin Mansion is made of forty steel tubes with the height of 65.5m, which is divided into section by floor. Aiming at the characteristics of high structure building for steel tube concrete of this project, difficulties of concrete pumping and the problems of pipe blockage, pipe explosion and concrete maintenance during the construction process, the adopted technical measures and construction schemes are intensively introduced to overcome the difficulties.

橋梁拼接部位微膨脹混凝土內養護技術研究

于春江1，葉見曙2，高美蓉2，王進2，秦鴻根2

２０11年第4期

摘要

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摘要：基于“補償收縮-內養護-纖維限縮阻裂技術”配制了橋梁拼接部位C50微膨脹混凝土和微膨脹纖維混凝土，探討了摻不同纖維和內養護劑對混凝土工作性能、力學性能、變形性能和耐久性的影響規律。 Abstract：Based on the "Shrinkage compensating-Internal curing-Fiber limit-anti-cracking Technique", C50 micro-expansion concrete and micro-expansion fiber reinforced concrete used for the conjunction of bridges are prepared. The influence laws of adding different fibers and internal curing agents on workability, mechanical performance, deformation resistance and durability of concrete are discussed.

近斷層地震動對鋼筋混凝土框架結構地震反應的影響

張長浩1，王虎1，王薇2，黃拓3

２０11年第4期

摘要

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摘??要：研究了近斷層脈沖地震動的工程特性。按照《建筑抗震設計規范》（GB50011-2010）進行抗震設計，選擇具有前方向性效應、滑沖效應和遠場地三類地震動作為輸入，采用Sap2000對一座四層鋼筋混凝土框架進行非線性時程分析。分析結果表明：對于頂點位移、層間位移角和基底剪力等結構動力響應參數，當結構的地震反應進入彈塑性階段后，與遠場地震動下的反應相比，在具有前方向性效應和滑沖效應地震動作用下，結構的反應有較大幅度的增大，對結構中下部的破壞作用的影響比較顯著。Abstract:Theengineeringcharacteristicsofthenear-faultgroundmotionarestudied.Thefour-floorreinforcedconcreteframeisdesignedunder《Codeforseismicdesignofbuilding》GB50011-2010.TheSAP2000softwareisappliedtomodelit,andthenonlineartimehistoryanalysisofstructureisimplemented.Groundmotionswithforwarddirectivity,fling-stepandfar-fieldareselectedasseismicinputs．Theresultsshowthatintermsofsomestructuraldynamicresponseparameters,suchasthevertexdisplacement,thedisplacementcornerbetweenthelayersandthebaseshear,etc.,comparedwithfar-fieldgroundmotion,underthefunctionofgroundmotionwithforwarddirectivityandfling-step,thestructuralresponsestothegroundmotionwithnear-faultareincreasedconsiderablemagnitudeswhentheseismicresponsesofstructuresstepintotheelastic-plasticstage,andtheinfluenceondamagingthemid-lowerstructureisobviouslygreater.

混合砂漿防滲料分層性的試驗研究

徐曉蕾

２０11年第4期

摘要

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摘要：結合振動沉模防滲墻技術，通過分層模型的振動臺試驗，研究了混合砂漿防滲料的分層性隨振動時間的顯現情況，揭示了混合砂漿防滲料的性能指標隨振動時間的變化規律。 Abstract：According to the technology of vibratory sinking mold anti-seepage wall，through the layering vibratory dais model test, the layering characteristic following the vibratory time of the anti-seepage material of composite mortar is studied. Based on the test results，the variation law of the performance index of the anti-seepage material of composite mortar following the vibratory time is promulgated.

用生活垃圾焚燒發電廠爐渣制備混凝土路面磚的研究

曹旗1，吳清仁1，2，葉春瑜1，趙韻1，黃文峰1，陳嘉1

２０11年第4期

摘要

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摘要:基于利用廣州生活垃圾焚燒發電廠爐渣制備混凝土路面磚（碼頭用），探討了不同活化劑對焚燒爐渣制造混凝土路面磚性能的影響，分析了焚燒爐渣制備混凝土路面磚的環境安全性。研究結果表明，當焚燒爐渣和活化劑的摻量分別為原料總量的34%和1.5%時，焚燒爐渣制備的混凝土路面磚，28d抗壓強度達45MPa, 其重金屬溶出量符合GB3838-2002《地表水環境質量標準》v類水要求。 Abstract：On the basis of preparation for the pavement brick(used in dock) by the furnace slag from the Li Keng municipal solid waste incineration power plant in Guangzhou, the effects of different activators on the properties of the incinerator slag pavement bricks are investigated and the environmental safety of the incinerator slag pavement bricks are analyzed. The experimental results show that when the amount of incinerator slag up to 34% and activators with 1.5% of the raw materials, the 28 days compressive strength of pavement bricks can reach 45 MPa, and the amount of heavy metal leaching meets the v type water requirement of the “environmental quality standards for surface water ” （GB3838-2002）.

無石棉壓蒸纖維水泥板/硅酸鈣板若干技術問題的探討

鄭日鏡

２０11年第4期

摘要

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摘要：從木漿纖維的選擇與處理、改善漿料生產適應性的外加劑和提高產品性能的功能性材料三個方面，對無石棉纖維水泥板和無石棉硅酸鈣板在制造過程需要關注的問題進行了分析探討，希望可以幫助解決生產廠家碰到的相關問題。 Abstract: From the three aspects of choosing and disposing the wood bulk fiber, improving the producing applicability of additives to the mortar and the functional materials for improving the product performances, the attentive problems to the non-asbestos fiber cement board and non-asbestos calcium silicate board in the producing process are analyzed and discussed, which are hoped to solve the relative problems faced by the manufacture factories.

核廢料固化桶用鋼纖維活性粉末混凝土性能研究

江曉君1，嚴云1,2，胡志華1,2

２０11年第4期

摘要

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摘要：高強高韌的纖維活性粉末混凝土（RPC）作為核廢料固化桶的原材料具有很好的發展前景。為改善RPC韌性較差的缺點，研究了鋼纖維摻量對RPC力學性能及彎曲韌性性能的影響。試驗結果表明，鋼纖維的加入能夠大大提高RPC的力學性能及彎曲韌性，使RPC能更好地滿足核廢料固化桶材料的要求。 Abstract: As one raw material of container for storage of radioactive wastes, fiber reinforced high-strength and high-toughness reactive powder concrete (RPC) has a good prospect. To improve the shortcoming of bad toughness of RPC, the effects of steel fiber dosage on the mechanical performances and flexural toughness are researched. The experimental results indicate that the mechanical performances and flexural toughness of RPC can be enhanced greatly by adding the steel fiber, which makes RPC satisfy the requirement of container for storage of radioactive wastes better.

較高韌性混雜纖維混凝土彎曲抗拉性能試驗研究

王海超，劉校源

２０11年第4期

摘要

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摘要：以試件邊緣彎曲拉應變為控制參數，通過正交試驗并參照已有研究成果，對不同纖維摻量、粉煤灰用量及不同水膠比的混雜纖維混凝土進行了優化配合比設計，并對試件進行了彎曲抗拉性能試驗研究。結果表明，較高韌性混雜纖維混凝土可充分利用材料的抗拉強化作用和鋼纖維的防銹蝕作用，能在正常使用條件下，有效地限制混凝土構件的裂縫寬度，最大限度地保證鋼筋不遭銹蝕。 Abstract: Using the bending tension strain of sample edge as the controlling parameter, through the orthogonal experiment and referring the research results, the optimized mix proportion design is carried out for different content of fiber, fly ash and different water-binder ratio of hybrid fiber reinforced concrete, and the experiment of bending tension performance for specimen are researched. The results show that hybrid fiber concrete with higher toughness could make full use of tensile and strengthening performance of material as well as corrosion resistance role of steel fiber. Under the normal working condition, crack widths of concrete components can be availably limited, which make sure the reinforced bar away from corrosion utmostly.

齡期和試件尺寸對鋼纖維混凝土抗壓強度的影響

范向前1，胡少偉1,2，朱海堂3，李金章3

２０11年第4期

摘要

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摘??要：測定了不同尺寸、不同鋼纖維體積率混凝土試件的各齡期折后抗壓強度，并按照定義的抗壓強度尺寸效應計算方法，求出了不同尺寸試件之間的抗壓強度尺寸效應值。結果表明，相同齡期內，鋼纖維混凝土的抗壓強度較普通混凝土有所提高；鋼纖維混凝土的抗壓強度受到齡期、鋼纖維體積率和試件尺寸的影響；不同尺寸混凝土試件之間存在一定的抗壓強度尺寸效應值。Abstract：Thecompressivestrengthexperimentsaftercompressionineachagefordifferentdimensionanddifferentsteelfibervolumerateofsteelfiberreinforcedconcretearedetermined.Accordingtothedefinitionfordimensioncalculationmethodofcompressivestrength,thesizeeffectvaluesofcompressivestrengthfordifferentspecimensareobtained.?Theresultsshowthatinthesameage,?compressivestrengthofsteelfiberreinforcedconcreteisbetterthanthenormalconcrete.Thecompressivestrengthofsteelfiberreinforcedconcreteisaffectedbyage,volumerateofsteelfiberandspecimensize.Theconcretesampleswithdifferentdimensionexistcertainsizeeffectvaluesofcompressivestrength.

國標GB/T19496-2004《鉆芯檢測離心高強混凝土抗壓強度試驗方法》實施過程中應注意的若干問題

蔣元海1，朱文偉2，沈凱華3

２０11年第4期

摘要

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摘要：根據近年來國標GB/T 19496-2004《鉆芯檢測離心高強混凝土抗壓強度試驗方法》實施中所反映的一些情況，提出了在執行標準中應注意的幾個問題。 Abstract：In recent years, according to some situations in implement by national standard GB/T 19496-2004《Experimental method of drilling core checking compressive strength of centrifugal high-strength concrete》, some problems in carrying out the national standard are brought out.

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