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    蘇州混凝土水泥制品研究院有限公司

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    第四期

    水泥基膨脹珍珠巖吸聲材料性能研究
    水泥基膨脹珍珠巖吸聲材料性能研究
    • 胡成燕,李玉香
    2012年第4期
    摘要
    引用本文
    摘 要:以普通硅酸鹽水泥、輕質多孔膨脹珍珠巖為主要原料,利用物理和化學方式發泡,制備了水泥基膨脹珍珠巖多孔吸聲材料。研究了制備工藝、膨脹珍珠巖摻量、發泡劑種類和摻量、試樣厚度、水灰比、養護溫度及壓力等對材料吸聲性能的影響。 Abstract: The cement-based expansion perlite porous sound absorption material is prepared by normal silicate cement and light porous perlite through physical and chemical foaming. The influences of producing process, contents of expansion perlite, varieties and dosages of foaming agents, thickness of specimens, water-cement ratio, curing temperature and pressure on sound absorption properties of materials are investigate
    某深基坑旋噴樁水泥擋土墻裂縫成因及加固處理
    某深基坑旋噴樁水泥擋土墻裂縫成因及加固處理
    • 崔 濤,田 礫,高 昆,陳 聰
    2012年第4期
    摘要
    引用本文
    摘 要:介紹了某固體廢棄物中轉車間基坑開挖過程中面臨的粉煤灰填?;鶎铀?、地下腐蝕性水補給速度快等問題。針對該工程基坑擋土墻的實際裂縫出現的情況進行了分析,總結了內在因素和外在因素;并針對開裂原因,采取削坡、放坡、錨噴面層、鋼管支撐來進行加固,有效地阻止了裂縫的開展。 Abstract: During the foundation pit excavation of a certain solid waste transfer workshop, some problems are introduced, such as the fly ash filling sea layer sinking and collapse, corrosive underground water supply speed fast and so on. The cracks situation of the foundation pit retaining wall in the project is analyzed, and the intrinsic factors and the external factors are summarized. In view of the causes of cracking, such techniques of cutting slope, put slope, anchor bolt and shotcrete spray the surface, combined steel tube supporting to reinforce are adopted to prevent the crack development effectively.
    施工縫的傳力機理及其合理模型的研究
    施工縫的傳力機理及其合理模型的研究
    • 李鵬舉,馮仲齊
    2012年第4期
    摘要
    引用本文
    摘 要:大模板施工工藝廣泛應用于高層建筑施工,在這種施工方法中施工縫留置比較隨意, 而目前對鋼筋混凝土結構進行數值分析時,均認為結構是完整的,造成數值模型與實際結構不符。本文總結了施工縫的研究現狀,并對施工縫的傳力機理、力學模型進行了分析和探討。 Abstract: Big template construction technology is widely used in high-rise building construction, in this kind of construction method, more casual construction joints are retained, and currently the numerical analysis on steel reinforced concrete structure are all taken structure as complete, which causes discrepant between the numerical model and the actual structure. In this paper, the research on construction joints is summarized, and the force transmission mechanism and the mechanical model of construction joints are analyzed and discussed.
    立式PCCP成品內壓試驗機設計
    立式PCCP成品內壓試驗機設計
    • 王建青,劉國綱
    2012年第4期
    摘要
    引用本文
    摘 要:介紹了PCCP成品內壓試驗機的組成和各部件的功能,并針對成品PCCP不同壓力等級要求,論述了如何通過計算確定水壓試驗機設計中的活節螺栓、內膽、水管路系統等主要結構參數。 Abstract: The components of PCCP(Prestressed concrete cylinder pipe) product internal pressure tester and every part function of the tester are introduced. And according to the different pressure level requirements of PCCP, how to determine some major structure parameters of water pressure testers by calculating(such as live join bolts, inner containers, water piping system and so on)during designing the tester is discussed
    高速鐵路混凝土聲屏障單元板整體壓制成型自動化生產技術
    高速鐵路混凝土聲屏障單元板整體壓制成型自動化生產技術
    • 游海波,梁 勇
    2012年第4期
    摘要
    引用本文
    摘 要:介紹了自動化整體壓制成型高鐵用混凝土聲屏障單元板生產技術,以解決單元板吸聲面料脫落、吸聲系數偏低、表面成型粗糙、形狀偏差難以保證等難題,為高鐵用混凝土聲屏障提供優質的單元板。 Abstract: The production technology of high-speed railway concrete acoustic barrier unit plates with automation whole pressing molding is introduced, which can solve the problems such as sound absorbing fabric of unit plates exfoliated, sound absorbing coefficient lower, surface molding roughness, shape deviation hard to ensure and so on. Therefore, this technology can provide good quality unit plates for high-speed railway concrete acoustic barrier
    C15低強度混凝土中植筋的仿真計算及承載力折減研究
    C15低強度混凝土中植筋的仿真計算及承載力折減研究
    • 習會峰,吳永河,穆建春,李勝強
    2012年第4期
    摘要
    引用本文
    摘 要:國內外關于植筋技術的研究基本上是在較高強度混凝土基材上進行的,而實際工程中仍存在低強度混凝土結構用植筋技術加固的案例。本文利用大型有限元軟件ANSYS10.0對C15低強度混凝土中植筋進行了非線性有限元分析,分析了不同荷載下基材和受拉鋼筋應力分布的規律。得到了鋼筋的荷載-應力曲線和荷載-滑移曲線;求出了三種常用鋼筋的極限承載力;經過分析計算,得出了強度折減系數。結果說明,C15低強度混凝土中植筋是可行的,可以指導結構加固設計。 Abstract: The research of planting-bar technique at home and abroad is basically for high strength concrete, but ?the actual engineering still exists the use of planting-bar technique in low strength concrete structure. In this paper, nonlinear finite element analysis of planting-bar in low strength concrete is carried out through finite element software ANSYS 10.0. The stress distribution rule of concrete and bar is analyzed under different loading. The loading-stress curve and loading-slip curve of bars are obtained. The ultimate bearing capacity of three common used bars is obtained, and the strength reduction coefficient of planting-bar is obtained through the calculation. The results show that using planting-bar technique in C15 low strength concrete is possible, which can guide the structure reinforcement design
    回彈法檢測砌體中混凝土磚抗壓強度技術的研究
    回彈法檢測砌體中混凝土磚抗壓強度技術的研究
    • 范紅兵
    2012年第4期
    摘要
    引用本文
    摘 要:近年來,混凝土磚正以其生產能耗低、節土利廢等特點而為建設工程所廣泛應用,隨之而來的將是對既有建筑物或構筑物砌體中混凝土磚的抗壓強度的檢測提出了要求。本文主要介紹了江蘇地區采用回彈法檢測砌體中混凝土磚抗壓強度技術的研究情況。 Abstract:In recent years, the concrete bricks are widely used in construction project with its low energy consumption,saving soil and waste advantage, therefore, the test for compressive strength of concrete bricks in existing building or structure masonry is required. In this paper, the research situation for the use of rebound method testing the compressive strength of concrete bricks in the masonry is introduced in Jiangsu Province.
    集中荷載下寬跨比對鋼筋混凝土板受剪承載力的影響研究
    集中荷載下寬跨比對鋼筋混凝土板受剪承載力的影響研究
    • 魯正剛,辛立民,馬雪晴
    2012年第4期
    摘要
    引用本文
    摘 要:通過對鋼筋混凝土板受剪試驗結果的研究,分析了寬跨比對集中荷載下無腹筋板破壞形態和受剪承載力的影響。研究表明,隨著寬跨比的增加,板的破壞形態由梁剪、沖剪變化到沖切,并建議了相應的受剪承載力計算方法,該方法計算值與試驗結果能較好地符合。研究成果可供工程設計及修訂規范參考。 Abstract: According to the experimental results of reinforced concrete slabs under shearing capacity, the influences of breadth span ratio on the failure mode and shearing capacity of slabs without web reinforcement under concentrated loading are analyzed. The results show that with the increments of breadth span ratio, the failure mode of reinforced concrete slabs translates from beam shearing to punching shearing. Furthermore, the formulas for calculating the shearing capacity of reinforced concrete slabs are put forward. The calculated results are in good agreement with the experimental ones. The suggested formulas have fairly good practical value and can be used as the reference to the revision of the concrete specification in the future.
    納米SiO2與聚丙烯纖維對水泥基材料性能的增強作用研究
    納米SiO2與聚丙烯纖維對水泥基材料性能的增強作用研究
    • 董健苗,馬銘彬
    2012年第4期
    摘要
    引用本文
    摘??要:研究了不同摻量聚丙烯纖維對水泥基材料力學性能的增強作用,以及納米SiO2在高速研磨攪拌+超聲波分散的條件下,對摻聚丙烯纖維的水泥基材料的增強作用。試驗結果表明,在水泥基材料中摻入聚丙烯纖維能在一定程度上提高試樣的抗折、抗壓強度,隨著纖維摻量的增加,水泥基材料強度呈現先提高后逐漸降低的趨勢。采用高速研磨攪拌+超聲波的方法分散納米SiO2,在纖維及納米SiO2摻量均很小的情況下,可較大幅度提高水泥基材料的強度。Abstract:Theinfluencesofdifferentcontentsofpolypropylenefiberonmechanicalpropertiesofcement-basedmaterialarestudied.AndtheenhancedeffectsofnanometerSiO2ondifferentcontentsofpolypropylenefiberreinforcedcement-basedmaterialdispersedbythemethodofhighspeedgrinding+supersonicwavedispersingareinvestigated.Theexperimentresultsshowthatthepolypropylenefibercanincreasethebendandcompressionstrengthofsamplesinacertainextent,andwiththeincreaseofpolypropylenefibercontents,thestrengthofsamplesincreasesatfirstandthenreduces.Thestrengthofcement-basedmaterialsincreasesobviouslyintheconditionoflesscontentsofpolypropylenefiberandnanometerSiO2,whennanometerSiO2isdispersedbythemethodofhighspeedgrinding+supersonicwavedispersing
    低溫鋼纖維混凝土梁抗折疲勞特性的試驗研究
    低溫鋼纖維混凝土梁抗折疲勞特性的試驗研究
    • 付 操,宋海清
    2012年第4期
    摘要
    引用本文
    摘 要:在國內外有關鋼纖維混凝土疲勞特性研究的基礎上,試驗研究了低溫下鋼纖維混凝土梁抗折疲勞特性。試驗結果表明,應力水平對低溫養護鋼纖維混凝土梁抗折疲勞壽命產生顯著影響,低應力水平下的疲勞壽命遠遠高于高應力水平下的疲勞壽命。 Abstract: On the base of the domestic and overseas fatigue research on steel fiber reinforced concrete (SFRC), the flexural fatigue feature of SFRC beam is researched according to the basic mechanics property investigation of SFRC at low temperatures. The test results indicate that the stress level has significant effect on the flexural fatigue life of SFRC beam under low temperature curing. The fatigue life under low stress level is much higher than the fatigue life under high stress level.
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