第十期_2012_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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第十期

聚丙烯纤维对再生混凝土拉伸力学性能的影

秦荷成

２０12年第10期

摘要

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摘要：通过聚丙烯纤维再生混凝土单轴拉伸力学性能试验，分析研究了聚丙烯纤维对再生混凝土拉伸力学性能的影响。结果表明，掺一定量的聚丙烯纤维对再生混凝土的抗拉性、抗裂性有很大的提高，可解决再生混凝土拉伸力学性能低等影响工程应用的问题 Abstract: Through the uniaxial tensile mechanical properties test of recycled polypropylene fiber concrete, the effects of polypropylene fiber on the tensile mechanical properties of recycled concrete are analyzed and studied. The results show that adding a certain amount of polypropylene fiber can greatly improve the tensile and fissure resistance of recycled concrete, which can solve the problems such as lower tensile mechanical properties of recycled concret

陶瓷抛光渣对加气混凝土料浆发气与稠化的影响

张宪圆，林克辉，严玉梅，谢红波

２０12年第10期

摘要

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摘要：研究了不同陶瓷抛光渣掺量对加气混凝土料浆发气与稠化过程的影响，并探讨了某磺酸盐类外加剂对大掺量陶瓷抛光渣料浆性能的改善作用。结果表明，陶瓷抛光渣取代粉煤灰的量在30%以内时，对料浆发气、稠化及水料比影响较小；外加剂可改善料浆的稠化过程，但对发气过程不利。 Abstract: The effects of the quantities of ceramic polishing slag on the gasing and consistency process of aerated concrete are studied, and the performance improvement of the sulphonate additive for the high quantity ceramic polishing slag is discussed. The results show that when the amount of the ceramic polishing slag is less than 30%, there is less impact on the slurry gasing, consistency and water-solid ratio. The additive has positive effect on the slurry consistency process, while it has negative effect on gasing process.

某特种结构大体积混凝土温控技术简介

李少彬

２０12年第10期

摘要

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摘要：结合西安市某大型污水处理厂生物池的结构特点，介绍了该工程大体积混凝土施工过程中温度裂缝的控制措施，以及所采取的测温方法。 Abstract: Combining with the structure characteristics of one large biological tank of the sewage treatment plant in Xi’an, the controlling measures for the temperature cracks during the mass concrete construction process are introduced, as well as the temperature measuring method.

地下工程裂缝原因分析及预防

高波，徐飞，张强，白杰

２０12年第10期

摘要

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摘要：通过工程实例，对某地下工程裂缝产生的原因进行了判断和分析，并从改善混凝土浇注质量入手，提出了减少混凝土裂缝生成的预防措施。 Abstract: The reasons for concrete cracks of an underground engineering are analyzed through one practical engineering. And the preventive measures for improving concrete quality, reducing the generation of cracks of concrete are proposed.

结构自保温微孔砂轻混凝土的研究

胡维新1,2，孙伟2，秦鸿根2，阿卜力提普·阿卜杜拉2

２０12年第10期

摘要

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摘要：为提高结构自保温混凝土的强度、改善保温隔热性能，本文采用引气技术，对结构用砂轻混凝土进行引气，使砂轻混凝土中的砂浆具有多孔结构，与轻骨料形成微孔砂轻结构。研究结果表明，当含气量在10%～15%时，砂轻混凝土的强度可在20MPa以上，导热系数小于0.36W/(m·K)。用于240厚混凝土墙梁柱时，其平均传热系数Km<1.5，满足JGJ134—2010《夏热冬冷地区居住建筑节能设计标准》的要求。Abstract:Toimprovethestrengthandthermalinsulationperformanceofstructureself-insulationconcrete,thetechnologyoftheairentrainingintothesandlightweightconcreteisusedinstructuretomaketheporousstructureinthemortarofsandlightweightconcreteandformamicro-porous&sandlightweightstructurecombiningwithlightweightaggregates.Experimentalresultsdemonstratethatthestrengthofsandlightweightconcreteismorethan20MPaandthethermalconductivityislessthan0.36W/(m·K)whilethegascontentisbetween10%to15%.Usingitinthewallsandbeamswith240mmthickness,itsaverageheattransfercoefficientislessthan1.5(i.e.Km<1.5),whichmeetstheenergy-savingspecificationdefinedinthe“Designstandardforenergyefficiencyofresidentialbuildingsinhotsummerandcoldwinterzone(JGJ134-2010)”.

基于静载试验和病害分析的桥梁性能评估

商艳１，陈华２

２０12年第10期

摘要

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摘要：通过对一[U1]简支T梁桥进行病害分析和静载试验，测得控制截面在各种荷载工况下的挠度、应力、应变和裂缝，将其与理论计算值以及与规范规定的界限值进行比较，应用比较结果对该桥梁的使用性能进行综合评估，最后对桥梁的加固提出了可行性建议 Abstract: Based on the T-shaped bridge disease analysis and static load test, the deflection, stress, strain and cracks of control section under various load cases are tested. The theoretical calculation and the standard limit value are compared with each other. The bridge performance evaluation is carried out by using the comparison result, and the feasible proposals for strengthening the bridge are put forward

硫酸盐腐蚀钢筋混凝土板受弯力学性能的退化规律

周效国，汪俊华

２０12年第10期

摘要

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摘要：通过大型非线性数值分析软件ABAQUS对受硫酸盐腐蚀后的钢筋混凝土板进行模拟分析，揭示了ABAQUS中塑性损伤模型进行非线性模拟的有效性以及钢筋混凝土板受腐蚀后受弯性能的退化规律。通过模拟结果和试验结果的对比，可以看出，ABAQUS非线性模拟是行之有效的。从ABAQUS模拟结果和试验结果均可看出随着腐蚀度D的增加，板的极限承载力、延性和刚度逐渐减小，其中承载力下降约3%～5%，延性下降约19%～28%，刚度下降9.96%～19.43%，而跨中挠度逐渐增大，这主要是因为随着硫酸盐的不断侵蚀，生成膨胀性物质钙矾石，板截面的损伤不断严重，使得截面的有效抗弯高度以及弹性模量降低，最终造成板的承载力、延性、刚度的降低以及跨中挠度的增大Abstract:Thelarge-scalenonlinearfiniteelementsoftwareABAQUSisusedtosimulatethereinforcedconcreteslabattackedbysulfatetorevealtheeffectivenessaboutnonlinearsimulationofdamagedplasticmodelinABAQUSandtheflexuralperformancedegradationlawsofreinforcedconcreteslabattackedbysulfate.Comparedwiththesimulationresultsandexperimentalresults,it’sfoundthattouseABAQUStosimulatenonlinearperformanceiseffective.Theultimatestrength,ductilityandstiffnessoftheseslabsgraduallydecreasewhenthecorrosiondegreeDincreases,andtheultimatestrengthdecreaseabout3%～5%,theductilitydeclinesabout19%～28%,thestiffnessdeclineabout9.96%～19.43%,meanwhilethedeflectionincreasesbecauseoftheconstanterosionofsulfate,whichresultsinmuchexpansivesubstance(Ettringite),andthecross-sectionsoftheslabcontinuetodamageseriously,allthesemaketheeffectiveflexuralheightofthecross-sectionandtheelasticmodulusdecrease,whichmaketheultimatestrength,ductility,stiffnessoftheslabsreduceandthedeflectionincreasesintheend.

纤维膨胀混凝土的试验研究

史美东1，史如平2

２０12年第10期

摘要

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摘要：介绍了掺PP纤维和TEA-H膨胀剂的试验、加ASA膨胀剂并掺纤维的膨胀砂浆对比试验，其中包括聚丙烯纤维抗干缩开裂性能试验、ASA膨胀剂的检测、加不同掺率的膨胀剂和不同掺量的PP纤维对比试验等，并对试验结果进行了分析，对纤维膨胀剂的应用提出了建议 Abstract: The tests of PP fiber and TEA-H expensive agent are introduced, and comparative tests of expansive mortar with ASA expansive agent and fiber is also introduced. The tests include the anti-dry-cracking test of PP fiber, testing of ASA expansive agent, and comparative tests of different ratio of expansive agent and PP fiber. The results of tests are analyzed, and the application of fiber-expansive-agent is proposed.

双掺聚丙烯晴纤维和偏高岭土混凝土抗冻融性能试验研究

张伟1，刘陈2，高原2，郑鹏飞2

２０12年第10期

摘要

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摘要：为解决严寒地区混凝土工程普遍出现的冻害现象，提高混凝土的抗冻性能，对双掺聚丙烯晴纤维和偏高岭土混凝土进行了200次冻融循环试验，测得其冻融前后试件的质量损失率与相对动弹性模量。结果表明，双掺聚丙烯晴纤维和偏高岭土可较大幅度提高混凝土的抗冻性能；随着偏高岭土掺量增加，混凝土质量损失率和相对动弹性模量都得到较大改善；随着聚丙烯晴纤维掺量的增加，混凝土质量损失率得到改善，相对动弹性模量逐渐降低。 Abstract: In order to resolve the problem of frostbite and improve the concrete freezing-thaw durability in the chilly area, 200 freezing-thaw cycles of polyacrylonitrile fiber and metakaolin concrete are carried out, and the mass loss rate and relative dynamic modulus are measured. The experimental results show that the polyacrylonitrile fiber and metakaolin can obviously improve the concrete freezing-thaw durability. When the content of metakaolin increasing, the mass loss rate and relative dynamic modulus of concrete is increased. When the content of polyacrylonitrile fiber increasing, the mass loss rate of concrete is improved, but the relative dynamic modulus of concrete is reduced.

混凝土输水管产品生产许可证实施细则”在新疆的实施情况与建议

朱光艺

２０12年第10期

摘要

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摘要：结合工作实践，介绍了新疆地区“混凝土输水管产品生产许可证实施细则”的实施情况，针对实施过程中部分企业存在的问题提出了相应的改善建议。此外，对该细则的部分规定阐述了自己的观点并提出了修改意见。Abstract:Combiningthewriter’sownworkingpractice,theimplementingsituationof“implementationdetailedrulesofproductionlicenseonconcretewater-carriagepipeproduces”inXinjiangarediscussed.Correspondingimprovementsuggestionsforsovlingtheproblemsofsomecompaniesinimplementationprocessofthedetailedrulesareputforward.Inaddition,someviews onthedetailedrulesareexpounded,andrelatedsuggestionsareputforward.

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