第九期_2011_《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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第九期

磨细钢渣粉在大体积混凝土中的应用

顾期斌1，徐二华2

２０11年第9期

摘要

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摘要：结合武汉融侨锦江项目工程，对磨细钢渣粉在大体积混凝土中的应用进行了研究，并通过试验对原材料和配合比参数进行了优化。试验表明，磨细钢渣粉掺量为取代水泥量的20%时，混凝土7d抗压强度平均值为24.8MPa，28d抗压强度平均值为48.2MPa，满足C40级混凝土设计规范的要求。 Abstract: Combining with Wuhan Rong Qiao Jin Jiang Project, the application of ground steel slag powder in mass concrete is researched, and the raw materials and mix proportion parameters are optimized through the tests. The test results show that when the dosage of ground steel slag powder is about 20% substituting the cement, the average 7d compressive strength of concrete is 24.8MPa, and the average 28d compressive strength is 48.2MPa, which can meet the requirements of C40 design specifications for concret

缓粘结型预应力钢绞线的研究与应用

梁松1，肖钢顺2

２０11年第9期

摘要

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摘要：介绍了一种新型预应力工艺技术——缓粘结预应力技术，探讨了缓粘结型环氧树脂钢绞线涂层的抗腐蚀性能和力学性能。工程应用结果表明：缓粘结型预应力工艺技术对提高结构安全性能和耐久性能都是有利的。 Abstract: A new kind of prestressed process technology—retard-bonded prestressed technique is introduced, and the corrosion resistance and mechanical properties of retard-bonded epoxy resin strand coating are discussed. Engineering application results indicate that retard-bonded prestressed technique is useful for improving the safety and durability of the structur

基础滑移隔震研究与应用现状综述

蔡康锋，李玉荣，唐月

２０11年第9期

摘要

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摘要：对基础滑移隔震研究与应用现状进行了综述，介绍了滑移隔震技术的基本原理和隔震装置；根据国内外的研究和应用情况，从理论分析、试验研究和工程应用等方面进行了分析和总结；最后评述了存在的问题，并对今后的发展进行了展望。 Abstract: A systematic introduction to the research achievements in the field of sliding isolation of building vibration is carried out. The basic theories and isolation sets of sliding isolation technology are expounded. According to the research and application in home and abroad, the theoretical analysis, test research and project application are analyzed and summarized. Finally, some problems are reviewed, and the developments in the future are prospected.

相变膨胀珍珠岩储能保温砂浆的性能研究

蒋晓曙1，刘燕2，李莽2，陆雷2

２０11年第9期

摘要

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摘要：以相变膨胀珍珠岩储能颗粒为保温砂浆轻骨料，水泥及粉煤灰为胶结料，并掺加一定量的可再分散乳胶粉及纤维来配制相变储能保温砂浆；研究了相变膨胀珍珠岩掺量对相变储能保温砂浆抗压强度、相变储能板材导热系数和保温砂浆吸水率的影响；用SEM及DSC对相变储能保温砂浆内部形貌及热性能进行了探讨。 Abstract：Through the phase change expanded perlite used as lightweight aggregate for thermal insulation mortar, cement and fly ash as binder, the phase change energy storage insulation mortar is prepared which is mixed with a certain amount of polymer powders and fibers. The effects of the dosage of phase change energy storage insulation mortar on the compressive strength of mortar, thermal conductivity of phase change energy storage plates and water absorption of insulation mortar are studied. The surface morphology and thermal properties of the phase change energy storage insulation mortar are discussed by SEM and DSC.

局部区段锈蚀的钢筋混凝土柱承载力研究

高向华1，王小惠1，王建涛2

２０11年第9期

摘要

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摘要：研究了局部区段内锈蚀钢筋暴露、混凝土保护层剥落的钢筋混凝土柱的承载力问题。考虑局部区段内不同钢筋锈蚀率、柱两侧钢筋均暴露的情形，通过理论分析，提出了一种计算局部区段内钢筋锈蚀情况下的偏心受压柱的承载力简化计算模型，并通过实验验证了模型的可行性。 Abstract: The load capacity of reinforced concrete (RC) column with partial length corrosion is theoretically studied, where the exposure of the longitudinal bar, delaminating of concrete cover and loss of the bond within this partial length are considered. Simplify analytical model about the load capacity of RC column with partial length corrosion under eccentricity load is proposed through the theoretical analysis, and the feasibility of the proposed model is verified by the experiment results

客运专线活性粉末钢纤维混凝土配比试验研究

梁勇，游海波

２０11年第9期

摘要

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摘要：在满足客运专线活性粉末混凝土（RPC）材料人行道挡板、盖板技术要求前提下,并在保证构件生产工艺的情况下,试验研究了水胶比、硅灰、石英粉以及钢纤维掺量对RPC混凝土工作性能及抗压强度的影响，配制出了抗压强度为154MPa，抗折强度为21.5MPa，且各项指标均能满足《客运专线活性粉末混凝土（RPC）材料人行道挡板、盖板暂行技术条件》所规定的RPC混凝土。 Abstract: Under the technical demands for sidewalk baffle and cover plates of passenger dedicated line reactive powder concrete(RPC) material, to ensure the component producing process, the effects of water binder ratio, silica fume, quartz powder and steel fiber dosage on workability and compressive strength of RPC is researched by experiment. The RPC with 154MPa compressive strength, 21.5MPa flexural strength and each index satisfied the < Temporary technological terms for sidewalk baffle and cover plates of passenger dedicated line reactive powder concrete(RPC) material> is prepared.

不同地质条件对输电铁塔塔基纤维增强聚合物筋混凝土粘结性能的影响

朱学佳1，曹志翔1,2，曹秀丽1

２０11年第9期

摘要

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摘要：通过试验，研究了酸环境、碱环境、盐环境和湿环境四种不同地质条件对纤维增强聚合物筋粘结强度的影响。研究结果表明，酸性环境条件下纤维增强聚合物筋混凝土粘结强度有所降低，而湿环境、碱环境与盐环境下纤维增强聚合物筋混凝土粘结强度有一定程度的提高。输电铁塔混凝土塔基破坏是输电塔线体系破坏的一种形式，局部采用纤维增强聚合物筋代替钢筋有较好的效果。 Abstract: Through the tests, the effects of different geological conditions such as acid, alkali, salt and wet environment on the bond strength of fiber reinforced polymer bars are studied. The research results show that the bonding strength of fiber reinforced polymer bars is a bit decreased under acid environment, however, it is increased under alkali, salt and wet environment. The damage of concrete tower foundation of transmission tower is a kind of damages of transmission tower line system, which can be improved by locally using fiber reinforced polymer bars substituting reinforcements.

喷射补偿收缩钢纤维混凝土带模与标准养护抗压强度对比分析

童俊豪，马芹永

２０11年第9期

摘要

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摘要：通过正交试验对喷射素混凝土、喷射补偿收缩混凝土、喷射钢纤维混凝土、喷射补偿收缩钢纤维混凝土带模养护与标准养护的抗压强度进行了极差和对比分析。试验结果表明，钢纤维体积率与膨胀剂掺量的推荐组合，在标准养护条件下为0.8%和6%，在带模养护条件下为1.6%和6%；在膨胀剂掺量为10%，钢纤维体积率为1.6%时，抗压强度提高比率最大，为17.9%。 Abstract: The range and comparative analysis on compressive strength of shotcrete, shrinkage-compensating shotcrete, steel fiber shotcrete, shrinkage-compensating steel fiber shotcrete are carried out by orthogonal experiment under molding maintenance or standard maintenance. The experimental results show that the recommendations for steel fiber volume rate and expansive agent under the standard maintenance condition are 0.8% and 6%, and under the molding maintenance condition are 1.6% and 6%. The largest improving ratio of compressive strength is 17.9% when the expansive agent dosage is 10% and steel fiber volume rate is 1.

基于ANSYS软件的CRTSⅡ型轨道板模具设计

张建超1，胡德杰2，王军3

２０11年第9期

摘要

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摘要：轨道板模具是CRTSⅡ型无砟轨道板预制中的关键设备之一。介绍了CRTSⅡ型轨道板模具的主要结构组成，阐述了运用ANSYS软件对轨道板模具有限元模型的建构方法、单元应用、载荷组合及加载方式等过程，并通过分析计算得出最不利工况下模具的应力与变形，对其强度和刚度进行检算以优化轨道板模具的结构设计，以期推广该方法的应用。 Abstract: The mold for track plates is one of the key equipments for the prefabricating process of CRTS Ⅱ unballasted track plates. The main structures of the mold for CRTSⅡ track plates are introduced. The model of the construction method, the unit type, load group and loading method using finite element software ANSYS are illustrated, and the stress and deformation of the mold under the most unfavorable conditions are analyzed and calculated. The mold strength and rigidity are confirmed to optimize the structure design of the mold, in order to popularize the application of this method

使用25年后的一阶段预应力混凝土管性能检测

尹秋成1，曹生龙2，李良1，赵新盛1，李强3

２０11年第9期

摘要

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摘要：对使用了25年的一阶段预应力混凝土管进行了性能检测，其目的是为了检验预应力混凝土管在运行了25年后的质量变化情况。结果表明，一阶段预应力混凝土管的质量无明显下降，仍能达到产品标准要求的指标。 Abstract：The performances of the first stage prestressed concrete pipes which have been used 25 years are tested. The aim of the experiment is to test the quality changes of this prestressed concrete pipes after using 25 years.The results show that the quality of the prestressed pipes doesn't appear obviously decline，and it still can reach the indexes of the product standards requirements

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