第六期_2010_《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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第六期

硅酸钙板生产线专用升降平台的设计与应用

刘绍庄

２０10年第6期

摘要

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摘要：介绍了硅酸钙板生产线专用升降平台的设计计算、结构尺寸设计对其驱动力的影响，分析了设计步骤、设计要点与应用情况。 Abstract：The design calculation of special lifting platform for calcium silicate board production line and the influences of structural dimension design on its drive force are introduced. Design steps, design key points and application situation are analyzed.

复合外墙板结构的优化设计

张承志1，王爱勤2

２０10年第6期

摘要

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摘要：提出了一种新的板材结构优化设计方法，并运用这一方法优化了复合外墙板的结构参数，分析了面层材料和芯层材料的性能对优化结果的影响。 Abstract: An optimized design method of new slab structure is offered. By applying this method, the structural parameters of composite exterior wall slab are optimized, and the influence of properties of the surface layer and core layer materials on the optimized result is analyzed.

局部区段锈蚀的钢筋混凝土梁抗剪承载力试验研究

李冰１，高向华１，王小惠１，史荣飞２

２０10年第6期

摘要

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摘要：根据实际工程构件中钢筋锈蚀的不均匀性，设计了14根钢筋混凝土梁，并进行了试验梁在两对称集中荷载作用下的抗剪性能试验。通过对不同特征试验梁的裂缝分布、破坏模式和极限承载力的对比分析，研究了一侧剪跨内不同长度局部区段内不同的锈蚀特征对梁受力性能和承载力的影响。结果表明，一侧剪跨局部区段无粘结梁、锈蚀梁的力学性能与正常梁有很大的区别：因局部区段内的完全无粘结，局部区段无粘结梁在无粘结一侧的剪跨区内无斜裂缝，梁可能发生粘结完好一侧的剪切破坏，也可能发生弯曲破坏。对局部区段锈蚀梁，虽然所有的试件均因剪跨内的锈蚀区段而破坏，但随着锈蚀区段长度的增长和其内钢筋锈蚀率的增加，梁呈现出较脆的破坏模式和较低的极限承载力。 Abstract: According to inhomogeneity of component steel corrosion in practical engineering, 14 RC beams are designed, and under the roles of symmetrical concentrated loading, shear properties tests of testing beams are conducted. Through crack distinctions, contrastive analysis of damage modes and limited capacity of different characteristic testing beams, the influences of different corrosion characteristic of the partial section with different lengths in one side shear span on beams mechanical properties and bearing capacity are researched. The results indicate that mechanical properties beteween unbonded or corroded beams of the partial section in one side shear span and normal beams have a lot of differences: because of completely unbonded in partial section, unbonded beams of the partial section in unbonded side shear span have no diagonal cracks, therefore, beams may happen shear damage in good bonded side or will happen bending damage. For the corroded beams in partial section, all samples are destroyed because of corrosion section in shear span, however, by the length of corrosion section increasing and steel corrosion rate inside increasing, fragile damage modes and low limited capacity of beams are presented.

玄武岩纤维增强机场道面混凝土力学性能试验研究

李文蕾，吴永根，马世宁

２０10年第6期

摘要

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摘要：对比分析了两种规格的玄武岩纤维分别以0.05%、0.10%、0.15%的体积掺量对机场道面混凝土抗折、抗压强度性能的影响规律。试验结果表明，玄武岩纤维对机场道面混凝土有较好的力学增强性能，28d抗折强度提高6.09%～19.80%，对抗压强度影响不明显，并且长度40mm、直径40μm的短切玄武岩纤维较长度20mm、直径20μm有更好的增强效果，可以在机场混凝土道面施工中使用，其最佳体积掺量为0.10%。Abstract：Theeffectsoftwokindsofbasaltfiberwith0.05%,0.10%,0.15%volumedosageontheflexuralstrengthandcompressivestrengthofairportpavementconcreteareanalyzedandcompared.Testresultsindicatethatbasaltfiberforairportpavementconcretehasgoodenhancingmechanicalproperty.Byincreasing6.09%～19.80%flexuralstrengthin28d,basaltfiberdonothaveobviouseffectsoncompressivestrength.Short-cutbasaltfiberwithlength40mm，diameter40μmhasbettereffectsonmechanicalpropertiesthanbasaltfiberwithlength20mm，diameter20μm,whichcanbeusedinairportconcretepavement,anditsoptimumvolumedosageis0.10%.

纤维增强水泥基复合材料界面性能的研究进展

曹明莉，刘晶，位建强

２０10年第6期

摘要

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摘要：基于界面在复合材料中的重要性，介绍了纤维增强水泥基复合材料中，纤维与水泥基的界面性能以及目前常用的界面性能的测试手段；同时，对目前常用的纤维（钢纤维、聚丙烯纤维）及新型无机矿物微纤维CaCO3晶须，与水泥基材料的界面的组成与结构的改善办法进行了总结。 Abstract: Based on the importance of interface in composite materials，the interfacial properties between fiber and cement-based materials and usual testing methods are introduced in carbon fiber reinforced cement composites. At the same time, composition of interface in cementitious materials and improving measures of structures are summarized，which are formed by fibers(steel fiber or polypropylene fiber) or new inorganic mineral microfiber--CaCO3 whiskers mixed.

钢纤维混凝土弹塑性损伤本构模型试验研究

梅世强，姜袁，郝景宏，杨克荣，马莉

２０10年第6期

摘要

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摘要：对钢纤维含量为0和3%的混凝土进行了应变速率为10-3的等应变增量重复加卸载试验。结果表明，在相同应变水平时，钢纤维混凝土的累积塑性变形低于普通混凝土。钢纤维混凝土的刚度变化幅度较普通混凝土小，约为0.86倍初始弹性模量，而普通混凝土的约为1.1倍初始弹性模量。依据刚度退化规律，并考虑损伤临界值的影响，得到了关于应变的损伤变量表达式；依据试验结果得到了单轴受压状态下的混凝土全量弹塑性损伤全量本构模型。Abstract:Equalstrainincrementcyclicloadingandunloadingtestswithstrainrateat10-3werecarriedoutforsteelfiberreinforcedconcrete(SFRC)with0and3%respectively.Theresultsshowthat,atthesamestrainlevel,accumulativeplasticdeformationofSFRCislessthanplainconcrete.TherangeofstiffnessvariationofSFRCislessthanplainconcrete,whichis0.86timesoftheinitialelasticmodulusforSFRCand1.1timesforplainconcrete.Basedonstiffnessdegradationrules,andconsideringtheeffectondamagecriticalvalue,theformulasofdamagevariablesforstrainareobtained.Throughthetestingresults,constitutivemodelofuniaxialcompressiveconcretewiththetotalelastic-plasticdamageisobtained.

聚酯纤维和碳纤维硫铝酸盐水泥混凝土力学性能的研究

王伟，王文奎，徐兆辉,王拓

２０10年第6期

摘要

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摘要：研究了聚酯纤维和碳纤维硫铝酸盐水泥混凝土的力学性能。结果表明，在90d龄期时，聚酯纤维和碳纤维硫铝酸盐水泥混凝土的抗压强度分别达到了58.9MPa、52.4MPa，比同龄期素混凝土试样分别提高了25.6％和12.0％；而劈拉强度分别达到了5.77MPa和5.11MPa，比同龄期素混凝土试样分别提高了41.1％和24.9％。碳纤维和聚酯纤维对硫铝酸盐水泥混凝土均有明显的约束裂缝扩展的能力，表现为在28d龄期时，碳纤维混凝土的断裂能达到113.4kJ，比基准混凝土提高了28.1％，而聚酯纤维混凝土的断裂能则达到了139.8kJ，比基准混凝土提高了58.0％。 Abstract: The mechanical properties of polyester fiber and carbon fiber reinforced sulphoaluminate cement (SAC) concrete are researched. The results indicate that the compressive strengths of polyester fiber and carbon fiber reinforced SAC concrete are as high as 58.9MPa and 52.4MPa respectively at 90 days age, which are increased by 25.6% and 12.0% respectively, compared with plain SAC concrete at the same age. The splitting tensile strengths of polyester fiber and carbon fiber reinforced SAC concrete are as high as 5.77MPa and 5.11MPa respectively at 90 days age, which are increased by 41.1% and 24.9% respectively, compared with plain SAC concrete at the same age. The function of carbon fiber and polyester fiber to limit the development of cracks propagation for SAC concrete is obvious, and the fracture energy of carbon fiber reinforced SAC concrete is as high as 113.4kJ at 80 days age, which is increased by 28.1% compared with plain SAC concrete. The fracture energy of polyester fiber reinforced SAC concrete is as high as 139.8kJ at the same age, which is increased by 58.0% compared with plain SAC concrete.

不同几何尺寸混杂纤维混凝土物理模型的研究

王成启

２０10年第6期

摘要

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摘要：由混凝土裂缝的扩展过程，建立了不同几何尺寸混杂纤维混凝土增强作用的物理模型，并用试验结果进行了验证。结果表明，模型与试验结果是一致的，可为几何混杂纤维混凝土的材料设计提供一定的理论基础。 Abstract: Because of the extension process of concrete cracks, physical models of enhancing role of hybrid fibers reinforced concrete with different sizes are established, and the models are verified by the testing results. The results show that the values of models and testing results are the same, which provide the certain theory of material design of hybrid fibers reinforced concrete.

管桩常压蒸汽养护温度变化测量试验

李成龙

２０10年第6期

摘要

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摘要：根据试验测量结果，阐述了管桩生产过程中常压蒸汽养护的温度变化规律，管桩混凝土与环境温度的变化关系，使养护温度能够更好的控制在要求范围内，合理地调整工艺制度。 Abstract：According to the results of experimental measures, temperature changing rules of normal pressure steam curing during the production process of cylinder piles are introduced. The changing relationship between concrete cylinder piles and environmental temperature lets the curing temperature can be better controlled in required range and the process system can be reasonably coordinated.

预应力混凝土管桩生产安全事故分析

蒋元海1，潘加根2

２０10年第6期

摘要

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摘要：通过对我国现阶段不同生产规模、不同建厂时间、不同地区分布的18家管桩生产企业近年来发生的381起安全事故统计，提出了目前我国管桩企业生产中安全事故发生的各个工序存在的隐患程度，分析了事故产生的4个方面的主要原因。 Abstract：Through the 381 accidents happened in recent years in 18 piles producing enterprises with different production scale, manufacturing time and area distribution at the present stage, the potential hazards are brought out for each procedure of occurring accidents in piles producing enterprises, and the main reasons of occurring accidents are analyzed in four aspects.

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