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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第十期

    尾礦砂PVA水泥基復合材料抗壓和抗彎性能試驗研究
    尾礦砂PVA水泥基復合材料抗壓和抗彎性能試驗研究
    • 鮑文博,張少峰,曲利輝,底高浩
    2013年第10期
    摘要
    引用本文
    摘 要:研究了在不同尾礦砂替代率、纖維摻量和纖維長度對尾礦砂水泥基復合材料的增強和增韌作用。試驗驗結果表明,尾礦砂替代PVA水泥基復合材料中的細骨料工作性能和基本力學性能穩定,制備工藝滿足要求;在纖維長度和摻量一定時,尾礦砂替代率為50%效果較好;纖維長度為12mm,摻量為26kg/m3時,PVA可以使尾礦砂PVA水泥基復合材料的延性明顯增強。 Abstract: The different replacement ratio of tailing sand to cement as well as the reinforced and toughening roles of content and length of fiber in the cement-based composites with tailings sand are studied. The test results show that using tailing sand to replace PVA cement-based composites as fine aggregate, the workability and basic mechanics performance of the mixture is stable and can meet the requirements of the preparation technology; when the replacement ratio of tailing sand is 50% and the length and content of PVA fiber are fixed, the properties of the mixture are much better; when the length of PVA fiber is 12mm and the content of PVA fiber is 26kg/m3, the ductility of the tailing sand and PVA cement-based composites with tailing sand can significantly enhance.
    石英巖煤矸石人工砂代替河砂配制砂漿性能試驗研究
    石英巖煤矸石人工砂代替河砂配制砂漿性能試驗研究
    • 呂 晶,李曉光
    2013年第10期
    摘要
    引用本文
    摘 要:為研究石英巖煤矸石人工砂替代河砂配制砌筑砂漿的可行性,對陜北某煤礦所排出石英巖煤矸石破碎制得人工砂替代河砂配制砌筑砂漿的拌合物性能和力學性能進行試驗研究。研究結果表明,煤矸石破碎過程中產生的細粉可以作為惰性填料摻入砂漿;摻入水泥用量20%的煤矸石細粉可改善砂漿拌合物和易性,同時可提高砂漿的立方體抗壓強度和軸心抗壓強度;用50%石英巖煤矸石人工砂替代河砂時,砂漿分層度最小,70%替代河砂時軸心抗壓強度和彈性模量均達到最小值。 Abstract:The workability and mechanical behaviors of the mortar prepared with artificial sand made by breaking quartzite gangue from coal mine in Northern of Shaanxi is studied in order to investigate the feasibility of masonry mortar prepared with quartzite gangue (artificial sand) broken to replace the river sand. The study shows that the coal gangue powder produced by the fragmentation technology can be added into the mortar as insert filler; the workability of the fresh mortar can be improved by mixing with coal gangue powder at 20% of the cement content, while the compressive strength and axial compressive strength of the cube specimens are also increased. The coursing degree of mortar is minimum when 50% of the quartzite gangue replaces river sand, and the axial compressive strength and elastic modulus of the specimens can be minimum value when the replacement ratio of the quartzite gangue is 70%.
    拉法基某工程項目基礎混凝土裂縫原因分析及對策
    拉法基某工程項目基礎混凝土裂縫原因分析及對策
    • 國衛生
    2013年第10期
    摘要
    引用本文
    摘 要:拉法基瑞安重慶永川水泥生產線項目地質狀況及施工條件比較復雜,在部分基礎和墊層以下填充混凝土工程施工過程中出現了裂縫現象。分析了本工程出現裂縫的原因,闡述了使裂縫得到有效控制所采取的一系列措施。 Abstract: Because the geological condition and construction condition of Lafarge Chongqing Yongchuan cement production line project are complicated, some parts such as the part foundation or under the cushion layer had the cracks during the construction process of filling the concrete. For solving the problem, the causes of cracks are analyzed, and some measures for controlling the cracks are put forward.
    滑模施工技術在超高變徑混凝土煙囪中的應用
    滑模施工技術在超高變徑混凝土煙囪中的應用
    • 夏晉華1,王守劍2
    2013年第10期
    摘要
    引用本文
    摘 要:以河南某電廠180m鋼筋混凝土結構煙囪施工過程為例,根據高聳煙囪結構特點,筒體采用無井架液壓滑模施工工藝,為了降低工程事故,滑模操作平臺采取整體拆除法,縮短了拆模時高空作業時間,克服了傳統工藝分散拆模法的諸多風險和安全隱患。 Abstract: Taking the construction process of 180m reinforced concrete structure chimney of a power plant in Henan as an example and according to the characteristics of high chimney structure, the construction technology of hydraulic sliding formwork without headframe is chosen for the barrel construction. The sliding operation platform uses the overall demolition method in order to reduce engineering accidents. The method can shorten the aerial work time when the formwork is removed and overcome many risk and hidden danger of disperse mould removal method.
    混凝土頂升法施工技術研究
    混凝土頂升法施工技術研究
    • 金 花1,李曉飛2,孫立功1
    2013年第10期
    摘要
    引用本文
    摘 要:結合撫順皇家海洋世界跨線橋110m提籃式雙曲鋼管混凝土拱施工,介紹了頂升法泵送混凝土的施工和質量控制方法;并依據混凝土頂升的施工原理、頂升壓力,分析了影響因素,改進了混凝土配合比;采取設置止回裝置和排氣溢流孔等方法,解決了鋼管拱混凝土一次頂升的難題。 Abstract: Combining with the construction of the Royal Fushun ocean world overpass 110m double steel pipe concrete vault with basket type, the lift-up pump concrete construction and a quality control method of concrete are introduced. And according to the principles of concrete lift-up construction, lift-up pressure, some relative influence factors are analyzed and mix proportion of concrete is optimized; in addition, using the methods of setting non-return devices, exhaust overflow orifice, etc. can solve the once lift-up problem of steel tube arch concrete.
    波形鋼腹板連續組合梁橋橫梁加固設計研究
    波形鋼腹板連續組合梁橋橫梁加固設計研究
    • 任大龍1,2,萬 水1
    2013年第10期
    摘要
    引用本文
    摘 要:通過結構計算分析了波形鋼腹板組合箱梁橋橫梁,針對橫梁裂縫寬度超限、承載能力不足的問題,提出增設預應力鋼束和增加特殊支座及預應力鋼束的兩個加固方案。對橫梁加固方案進行了計算,分析加固橫梁應力和抗裂性指標,分析結果表明,橫梁加固方案二從根本上解決了橫梁存在的問題。最后從計算結果、施工難度與工作量、鋼束錨固等因素考慮,選取了增加特殊支座及預應力鋼束的橫梁加固方案。 Abstract: The beams of composite box girder bridges with corrugated steel web are analyzed by the structure calculation, and according to crack width overrun of the beam and insufficient bearing capacity, the reinforcement schemes of adding prestressed steel beam or adding special bearings and prestressed steel beam are put forward. Meanwhile, the reinforcement schemes for the beam are calculated, and the indexes of stress and crack resistance of the reinforcement beams are analyzed. The results show that the reinforcement schemeⅡ can radically solve all the problems of the beam. In addition, considering some factors such as the calculation results, construction difficulty, workload, steel beam anchorage, it’s suggested that the schemes of adding special bearings and prestressed steel beam should be selected.
    設門洞的加氣混凝土砌體芯柱組合墻抗震性能分析
    設門洞的加氣混凝土砌體芯柱組合墻抗震性能分析
    • 吳會閣1,趙 彥2,曹秀玲1,諶會芹1
    2013年第10期
    摘要
    引用本文
    摘 要:運用ABAQUS有限元分析軟件對設門洞的加氣混凝土砌體芯柱組合墻進行了數值模擬,研究其抗震性能。在有限元模型的計算結果與先前足尺試件的試驗結果進行了對比驗證的基礎上,研究了豎向正壓力、洞口設置的大小及位置三因素對墻體抗震性能的影響。研究表明:隨豎向壓應力的增加,墻體的抗震性能得到改善;但豎向壓應力對極限荷載的影響小于對極限荷載下位移的影響;門洞寬度增大時,墻體的極限承載力降低,降低程度與墻體截面積的削弱程度基本成比例;門洞位置的改變,對墻體抗震性能的影響較小。 Abstract: In order to study the seismic performance of aerated concrete block masonry composite wall with a door opening,numerical simulation was conducted by using finite element software ABAQUS. The finite element results were verified with the laboratory results of full-scale specimens. On this basis, the composite walls with different parameters were investigated, which includes their vertical compression stress, opening sizes and opening position. The results show that with the increasing of vertical compression stress,the seismic performance improve;however, the effect of the vertical compression stress on the ultimate load is less than that on the displacement under ultimate load;With the increasing of the door width, the decrease in the wall’s bearing capacity is proportional to the decrease in the wall’s net area; and the change of door’s position has less effect on seismic performance of the composite wall.
    鋼筋自密實混凝土梁受剪性能試驗研究及分析
    鋼筋自密實混凝土梁受剪性能試驗研究及分析
    • 孫 銳 1,葉燕華1,2,薛洲海1,孫含笑1
    2013年第10期
    摘要
    引用本文
    摘 要:自密實混凝土工程應用逐漸增多,為研究鋼筋自密實混凝土梁的受剪性能,進行了4根鋼筋自密實混凝土梁試件和2根普通鋼筋混凝土梁試件的試驗,研究自密實混凝土梁受剪性能的破壞形態、開裂荷載、裂縫發展和抗剪承載力,并且將其與普通鋼筋混凝土梁作對比分析。將試驗值與GB 50010—2010《混凝土結構設計規范》計算的理論值與相比較。結果表明,豎向集中荷載作用下,鋼筋自密實混凝土梁與普通鋼筋混凝土梁有著相似的破壞特征與承載能力。鋼筋自密實混凝土梁理論值與試驗值的比為0.59,比普通鋼筋混凝土梁理論試驗值的比值高出0.11。 Abstract: The engineering application of self-compacting concrete (SCC) is increasing. For studying the shear capacity of reinforced SCC beams, four SCC beams and two corresponding normal concrete beams were tested. Meanwhile the failure forms, cracking loads, crack developments and shear strengths of the SCC beam are studied by comparing with those of the normal concrete beam. In addition, the experiment results are also compared with theoretical value of GB 50010—2010 “Concrete Structure Design Code”. The results show that failure characteristics and capacity of the two kinds of beams are almost the same. The capacity ratio of experiment result to theoretical value of the SCC beam is 0.59, which has an increase of 0.11 than that of the normal beams.
    納米材料對?;⒅楸鼗炷列阅艿挠绊? />
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                          <a href="/product/1819.html" target="_parent" class="title"><i class="iconfont12"></i>納米材料對?;⒅楸鼗炷列阅艿挠绊?/a>
                        
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                                      <span class="attrValue"><i class="iconfont2"></i> 霍建梅,李   珠,王文婧</span>
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                                      <span class="attrValue"> 2013年第10期</span>
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                            <div class="zhai"><i class="iconfont11"></i>摘要</div>
                            <div class="zhai1"><i class="iconfont11"></i>引用本文</div>
                            <span class="newMs">摘??要:通過單因素及耦合試驗研究納米SiO2(NS)和納米CaCO3(NC)對?;⒅楸鼗炷撂涠燃翱箟簭姸鹊挠绊?。NS以0.5%、1.0%、1.5%,NC以0.5%、1.0%、1.5%等量代替水泥,并對混凝土坍落度及7d、28d立方體抗壓強度進行了測試。試驗結果表明,S加入可顯著提高混凝土的強度,且最佳摻量為1%,但不利于混凝土的流動性;NC的加入降低混凝土的強度,但改善了混凝土的流動性,且最佳摻量為0.5%。通過納米礦物的合理復摻可制備出7d和28d立方體抗壓強度分別為26.7MPa、42.4MPa,坍落度為145mm的?;⒅楸爻兄鼗炷?。Abstract:Theeffectofnano-SiO2(NS)andnano-CaCO3(NC)onthecompressivestrengthandslumpofglazedhollowbeadinsulationconcretewasinvestigatedbysinglefactortestandcouplingtest.0.5%、1.0%、1.5%ofNSand0.5%、1.0%、1.5%ofNCwereaddedtopartialreplacecement.Theslumpoffreshconcreteand7d、28dcubecompressivestrengthweretested.ThetestresultsshowthataddingNScansignificantlyincreaseconcretestrengthandtheoptimumcontentis1%,butitisnotbeneficialtoflowabilityofconcrete;addingNCreducesconcretestrength,butimprovesflowabilityofconcrete,andtheoptimumcontentis0.5%.Glazedhollowbeadinsulationconcretewith7d、28dcubecompressivestrengthof26.7MPa、42.4MPaandslumpof145mmcanbemadebysuitableadmixtureswithnano-minerals.</span>
                         
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    纖維增強橡膠混凝土路用性能試驗研究
    • 趙素艷1,經冠舉2
    2013年第10期
    摘要
    引用本文
    摘??要:采用等體積置換法,將橡膠粉分別按10%、20%、30%、40%、50%取代細集料配制橡膠混凝土,并通過不同摻量的纖維對其進行增強,分析并評價了橡膠混凝土的力學性能、耐磨性能以及抗沖擊性能。試驗結果表明:纖維增強橡膠混凝土的抗壓強度較基準混凝土有大幅度降低,抗折強度以及劈裂強度明顯增大;隨著纖維和橡膠粉的摻入,混凝土的耐磨性能和抗沖擊韌性均有所提高,且隨著纖維摻量的增加而增大;當纖維摻量0.9kg/m3左右,橡膠粉體積摻量不超過40%時,混凝土性能最為優異。Abstract:Thekindofconcretewithdifferentcontentoffiberispreparedusingthevolumedisplacementmethodtoreplacefineaggregatebytherubberpowderof10%,20%,30%,40%,50%.Themechanicalproperties,wearresistanceandimpactresistanceofthefiberreinforcedrubberconcreteareanalyzedandevaluated.Theresultsshowthatthecompressivestrengthoffiberreinforcedrubberconcretesignificantlyreducecomparewithnormalconcrete,whiletheflexuralstrengthandsplittingstrengthofthefiberreinforcedrubberconcretesignificantlyincrease;addingfiberandrubberpowdercantheenhancewearresistanceandimpacttoughnessoftheconcrete,andthesepropertiesincreasewiththeincreasingcontentoffiber;Whenthefibercontentisabout0.9kg/m3,therubbercontentislessthan40%offineaggregate(volumecontent),theconcreteperformanceisthebest.
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