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    蘇州混凝土水泥制品研究院有限公司

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    第十一期

    基于廢棄混凝土再生二灰碎石的應用研究
    基于廢棄混凝土再生二灰碎石的應用研究
    • 仝小芳1,王 欣1,楊鼎宜2,史曉燕1
    2014年第11期
    摘要
    引用本文
    摘 要:回彈法檢測廢棄混凝土構件并快速分級生產不同質量等級再生骨料及再生粉狀顆粒,添加石灰及粉煤灰配制二灰碎石。設計正交實驗,通過重型擊實、無側限抗壓強度等試驗分析再生骨料質量、二灰摻量、再生粉狀顆粒等因素對其性能影響規律并得出最佳配比范圍。試驗表明,再生骨料及再生粉狀顆??梢圆煌潭忍娲烊还橇霞胺勖夯?,配置力學性能滿足承載基層要求的半剛性基層材料。 Abstract: The content of waste concrete has been quickly classified with the method of rebound testing to produce different quality grades of recycled aggregates. Then lime and fly ash are added to make lime-fly ash gallet. Designing orthogonal test, the effect of quality of recycled course aggregates, the content of lime-fly ash, regenerated waste concrete powder on matrix is analyzed through the method of heavy compaction test and unconfined compressive strength test. The range of best mix proportion of recycled aggregates lime-fly ash is obtained. This research proves that recycled aggregates and powder can change natural aggregates and fly ash by different levels. The mechanical properties of lime-fly ash regenerated from waste concrete can meet the requirement of loading based layer.
    廢橡膠粉在建筑材料中的資源化利用
    廢橡膠粉在建筑材料中的資源化利用
    • 蔣連接1,2,陳建超3
    2014年第11期
    摘要
    引用本文
    摘 要:闡述了廢橡膠粉在普通混凝土、瀝青混凝土、防水材料以及其他建筑材料中的應用現狀,建議今后逐步建立橡膠粉利用的主導地位,并大力加強其在建材領域的應用研究和推廣工作。 Abstract: The application status of crumb rubber in normal concrete, asphalt concrete, waterproofing material and other materials are expounded, and it’s suggested that the dominant position of crumb rubber utilization be established gradually and applied research and extension work of crumb rubber in the field of building materials be strengthened vigorously.
    泵送商品混凝土冬季病害探因及防治
    泵送商品混凝土冬季病害探因及防治
    • 郭進軍1,朱國闖1,肖欲東2
    2014年第11期
    摘要
    引用本文
    摘 要:對某在建工業廠房混凝土結構質量進行了檢測,發現混凝土強度偏低、現澆板開裂滲漏等病害,分析了泵送商品混凝土冬季施工病害產生的原因,評估了混凝土強度、裂縫和凍融深度,提出了針對性的工程防治措施,保證了后續工程建設的質量。 Abstract: The concrete structure quality of an industrial building was detected, and some construction diseases such as low concrete strength, cracking and leaking of slabs were found. The reasons of pumping premixed concrete diseases in winter construction are analyzed. The concrete strength, cracks and frozen depth are assessed. In addition, some pertinence engineering measures are put forward to ensure the quality of follow-up project construction.
    鉆孔灌注樁高性能混凝土的質量控制及施工
    鉆孔灌注樁高性能混凝土的質量控制及施工
    • 宋軍華1,王 玲2,魯守成1,張 萍2,楊智方1,高瑞軍2
    2014年第11期
    摘要
    引用本文
    摘 要:針對鉆孔灌注樁混凝土大流動性和高耐久性的技術要求,對蕪湖長江公路二橋主橋鉆孔灌注樁用C35高性能混凝土從原材料選擇、配合比設計以及混凝土性能三方面進行了研究。實際施工效果表明,按照高性能混凝土理念設計和施工的鉆孔灌注樁混凝土的粘聚性和流動性好,且無泌水、離析現象,芯樣測試結果也證明了鉆孔灌注樁混凝土滿足設計強度和耐久性要求,內部結構密實、無裂縫。 Abstract: Aiming at the technical requirements of high fluidity and good durability of bored cast-in-situ pile concrete, C35 high performance concrete for bored cast-in-suit pile in the main bridge of No.2 Wuhu Yangtze River Highway Bridge was investigated. Raw materials selection, mix proportion design and properties of the concrete were especially researched. Actual construction shows that the bored cast-in-situ pile concrete, designed and implemented according to the concept of high performance concrete, appears good adhesiveness and fluidity, without bleeding and segregation. Core samples test results also prove that the strength and durability of pile concrete can meet the design requirements, and the concrete are dense and free of cracks.
    JC/T 2163-2012《混凝土外加劑安全生產要求》行業標準簡介
    JC/T 2163-2012《混凝土外加劑安全生產要求》行業標準簡介
    • 劉紅飛1,蔣元海1,薛力梨1,趙 霞2,毛榮良3
    2014年第11期
    摘要
    引用本文
    摘 要:建材行業標準JC/T 2163-2012《混凝土外加劑安全生產要求》已發布實施,為便于該標準在企業生產中的實施和應用,介紹了外加劑安全生產指標要求和安全生產技術、標準應用時的注意事項等內容。 Abstract:Building materials industry standard JC/T 2163-2012 "Safety requirements for production of concrete admixture" has been implemented. For implementation and application of the standard in enterprise production, the requirements of admixture production safety index and safety technology and the main attentions in standard application etc. of industry standard JC/T 2163-2012 are introduced.
    地下車庫采用蜂巢芯樓蓋的技術經濟分析
    地下車庫采用蜂巢芯樓蓋的技術經濟分析
    • 吳 韜1,吳學輝1,李 娟2
    2014年第11期
    摘要
    引用本文
    摘??要:結合某實際工程的地下車庫頂板結構設計方案,介紹了蜂巢芯空腹樓蓋的基本構造及設計方法,并以密肋樓蓋結構作為對比方案,計算了兩種樓蓋方案的技術經濟指標,對比分析結果表明,地下車庫頂板采用蜂巢芯空腹樓蓋具有良好的技術優勢和經濟效益;且隨著使用荷載的增加,空腹樓蓋的經濟性在大空間、大跨度的地下結構頂板中表現得更為明顯。Abstract:Accordingtothestructuredesignofundergroundgaragerooffromapracticalproject,thebasicstructureanddesignmethodofthehoneycombedcorehollowfloorareintroduced,andtheribbedslabasacontrastscheme,economicandtechnicalindexesoftwokindsoffloorschemesarecalculated.Theresultsshowthatthegarageroofwithhoneycombedcorehollowfloorhasagoodtechnicalandeconomicadvantage;andwiththeincreasingofloads,theadvantageofhollowflooreconomyappliedinlargespace,largespanundergroundstructureroofismoreobviously.
    使用不同砂漿的砌體結構抗剪強度試驗研究
    使用不同砂漿的砌體結構抗剪強度試驗研究
    • 徐 蕾,馬青青
    2014年第11期
    摘要
    引用本文
    摘 要:本著對砌體結構抗剪強度的直接預測要求,對砌體結構試件進行了受剪斜壓試驗和三軸壓縮試驗。試件使用了不同砂漿組合,將斜壓試驗數據和三軸壓縮試驗數據套入文獻中的不同計算公式計算出砌體抗剪強度值,并進行了比較。試驗結果表明,砌體抗剪強度取決于接縫砂漿類型,相對于受剪斜壓試驗,三軸壓縮試驗方法簡單直觀,試驗結果更為可靠,更適合用于砌體結構的抗剪切試驗。 Abstract: Based on the prediction of masonry shear strength by direct way, diagonal compression tests and triplet tests are carried out. The shear strengths of brick masonry specimen are calculated using the various formulas from references, and the experimental data from appropriate experimental tests and triplet tests are compared. The test results show that the shear strength of brick masonry walls is depends on the types of joint mortar, and the triplet test is very straightforward and can provide reliable data results, so it’s more suitable for shear strength experiment of brick masonry walls.
    ETS法加固鋼筋混凝土短梁抗剪性能試驗研究
    ETS法加固鋼筋混凝土短梁抗剪性能試驗研究
    • 劉華新,柳根金,白云鵬,王曉坤
    2014年第11期
    摘要
    引用本文
    摘 要:介紹了一種鋼筋混凝土梁抗剪加固的新方法——ETS法,并對16根鋼筋混凝土短梁進行了試驗研究,探求ETS法的可行性。對比了BFRP筋綁扎、BFRP筋灌膠(ETS法)、普通鋼筋綁扎插入式三種加固的試件與未加固試件的抗剪性能;通過加固筋的應變,研究了加固筋的利用率。研究結果表明:鋼筋混凝土短梁采用ETS法加固后,加固筋的存在延緩了試件裂縫的發展,提高了開裂荷載和抗剪承載力,減小了短梁的跨中撓度,表現出良好的受力和變形性能。 Abstract: The Embedded Through-Section (ETS) which is a new reinforced method of concrete beam to improve the shear capacity is introduced. 16 RC short beams are tested to certify the feasibility of the reinforced method. The shearing capacity between the reinforced specimens strengthened with assembling BFRP bars, epoxy wrapping BFRP bars (ETS) and assembling rebars and the unreinforced ones were compared in the test. Utilization of reinforcing bars are showed by the strain data. The results indicate that the reinforced bars can delay the development of cracking, improve the cracking load and the shear capacity of the beam. At the same time the mid-span deflection of short beam is reduced. The RC short beams strengthened by ETS method show good mechanical and deformation properties.
    聚丙烯纖維增強堿礦渣水泥砂漿性能的研究
    聚丙烯纖維增強堿礦渣水泥砂漿性能的研究
    • 張蘭芳1,2,梁秋爽1,尹玉龍1
    2014年第11期
    摘要
    引用本文
    摘??要:研究了不同長度及摻量的聚丙烯纖維對堿礦渣水泥砂漿性能的影響。結果表明:6mm和12mm聚丙烯纖維摻量為0.04%~0.16%時,能提高堿礦渣水泥砂漿的流動度,改善堿礦渣砂漿的工作性,但隨著纖維摻量的增加,流動度增加幅度減小。摻入6mm聚丙烯纖維0.12%時,砂漿的早、后期抗壓強度都有所降低,但28d抗折強度提高25.5%,折壓比提高33.3%;當摻入12mm聚丙烯纖維0.12%時,28d抗壓、抗折強度分別增加11.8%和30.6%,且28d折壓比提高25%。相比而言,在同等摻量時,摻入12mm的聚丙烯纖維對堿礦渣水泥砂漿抗壓、抗折強度的貢獻優于摻入6mm的聚丙烯纖維。Abstract:Theeffectsofpolypropylenefiberunderdifferentlengthanddifferentadmixturecontentonthepropertiesofalkali-activatedslagcementmortararestudied.Theresultsshowthatwhenthepolypropylenefibercontentswith6mmand12mmlengthare0.04%~0.16%,workabilityofalkali-activatedslagcementmortarisimproved,butwiththeincreasingoffibercontent,thefluidityincreasingextentdecreases.Whenthecontentofthepolypropylenefiberswith6mmlengthis0.12%,thecompressivestrengthsofthemortarattheearlierandlaterstagesdecrease,buttheir28dflexuralstrengthsincreaseby25.5%andtheratioofflexuralandcompressivestrengthincreaseby33.3%aswell.Whenthecontentofthepolypropylenefiberwith12mmlengthis0.12%,the28dcompressivestrengthandflexuralstrengthincreaseby11.8%and30.6%respectivelyandits28dratioofflexuralandcompressivestrengthalsoincreasesby25%.Bycomparison,underthesameadmixturecontent,thepolypropylenefiberswith12mmlengthhaveabiggercontributiontothecompressivestrengthandtheflexuralstrengthofthealkali-activatedcementslagmortarthanthoseofpolypropylenefiberswith6mmlength.
    結網方式對碳纖維混凝土板抗彎性能的影響
    結網方式對碳纖維混凝土板抗彎性能的影響
    • 李 強,馬芹永,盧小雨,劉 杰
    2014年第11期
    摘要
    引用本文
    摘 要:采用平織法和打結法兩種方法編織網格間距分別為80mm和100mm的碳纖維編織網,通過板的抗彎試驗研究不同結網方式對不同網格間距CTRC板抗彎性能的影響。試驗結果表明,打結法編織的碳纖維編織網在減小CTRC板的撓度的同時也相應降低了抗彎強度,且當超出板的抗彎極限承載能力之后CTRC板不會完全破壞,仍具有殘余承載能力。其中網格間距為100mm打結碳纖維編織網增強混凝土板的抗彎強度及極限撓度較平織碳纖維編織網分別降低了36.8%和6.0%。 Abstract: Two methods of plain weaving and knot weaving were used to weaving carbon fiber textile with different grid spacings(80mm and 100mm), and the bending tests of CTRC plate were carried out to investigate the effect of weaving methods on bending property of CTRC plates with different grid spacings. The results show that carbon fiber textiles using knot weaving method can improve deflection and reduce bending strength of CTRC plates, and when the load exceeds the bending ultimate carrying capacity of plate, CTRC plates will not be completely destroyed and still have residual carrying capacity. When the grid spacing is 100mm, the bending strength and limiting deflection of the carbon fiber textile reinforced concrete plates are respectively reduced by 36.8% and 6.0% comparing with those of carbon fiber textile using the plain weaving method.
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