第五期_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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第五期

FMEA在管桩生产企业质量控制中的应用研究

吴国祥1,2，黄清林3

２０11年第5期

摘要

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摘要：针对先张法预应力混凝土管桩产品存在的主要质量问题，为提高其产品质量，根据FMEA质量控制技术（故障模式及影响分析）的基本应用原理，论述了其在先张法预应力混凝土管桩产品生产过程中应用的步骤和方法，列举了在产品设计和生产过程中质量控制的具体案例。 Abstract: According to the main quality problems of pre-tensioned prestressed concrete pile products, to improve the quality of products, and based on the basic application principles of quality control techniques of FMEA (Failure Mode Effects Analysis)，the steps and methods of FEMA applied in the producing process of pre-tensioned prestressed concrete pile products are discussed，and the specific cases for quality control in the product design and producing process are listed.

混凝土挡土墙表面缺陷的成因及防治

孙忠玉1，陈亚斌2，陈剑利3，刘正国3

２０11年第5期

摘要

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摘要：通过高速公路片石混凝土挡土墙的施工，提出了施工工艺要点，同时分析了挡土墙表面缺陷的成因，对缺陷的防治措施进行了探讨。 Abstract: Through the construction of rubble concrete retaining wall of expressway, the key points of construction technology are proposed, meanwhile, the reasons for surface defects of retaining wall are analyzed, and the discussion for defect prevention is carried out

极软围岩条件下巷道底臌治理加固技术研究

桑普天1，唐百晓2

２０11年第5期

摘要

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摘要：淮北某煤矿地压灾害极为严重，围岩顶、底多为砂岩、粉砂岩、泥岩，导致巷道底臌量大，现有支护无法得到满意的支护效果。通过对导致底臌因素的分析并结合目前矿井巷道现状，采用了全封闭棚架和注浆联合支护技术，有效地控制了围岩变形，使巷道一次支护成功。 Abstract: The situation of ground pressure hazard of a coal mine in Huaibei is extremely serious, because the top and bottom of surrounding rock are mostly sandstone, siltstone and mudstone, which leads to large amount of floor heave of roadway, and the supporting effects of existing support cannot be satisfactory. Based on the analysis of the factors leading to floor heave and combining with the current situation of mine roadway, a full-sealed scaffolding and grouting combination supporting technology is used, which can effectively control the surrounding rock deformation, and make the primary support of roadway be successful.

水泥生产线生料库环形基础冬季混凝土施工

田寅1，陆齐2

２０11年第5期

摘要

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摘要：结合中材国际甘肃白银4500t/d水泥生产线实际工程，介绍了冬季寒冷环境下水泥生产线生料库环形基础混凝土的配合比设计、设备选取及施工过程。 Abstract：Combining with Sinoma practical engineering of 4500t/d cement production lines in Baiyin, Gansu Province, the mix design, selections of equipment and construction process of ring foundation of mass concrete are introduced which is raw material silo of cement production lines under cold environment in winter

现浇板负弯矩筋保护层偏差控制

夏占国1，朱红兵2

２０11年第5期

摘要

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摘要：现浇板负弯矩钢筋保护层偏差直接影响到钢筋混凝土板的力学性能及耐久性，关系到建筑物的使用安全及使用寿命，现行混凝土结构验收规范要求在验收时必须提供保护层厚度实体检测结果，因此，在设计和施工中应采取有效措施保证保护层厚度的准确性，以确保构件的正常使用，提高工程质量。 Abstract: Negative bending moment reinforced protection layer deviations of in-situ slab can directly affect the mechanical properties and durability of reinforced concrete slabs, which is relative to the using safety of a building and its service life. The existing concrete structure acceptance specification requires that the entity test results of protection layer thickness must be supplied when doing acceptance, therefore, during the design and construction, effective measures to guarantee the accuracy of protection layer thickness should be taken, which can ensure the normal use of components and improve the engineering quality.

聚合物水泥包覆膨胀珍珠岩制备保温砌块的研究

张顺成1,2，郎建峰1，李小江3

２０11年第5期

摘要

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摘要: 利用聚合物水泥包覆膨胀珍珠岩制成改性珠粒,并将改性珠粒掺加到水泥砂浆中制成保温砌块。测试了改性珠粒的吸水率、筒压强度及导热系数，并据此确定了聚灰比；研究了改性珠粒不同掺加比例的保温砌块的密度、导热系数、吸水率以及强度的变化，并对掺加比例与导热系数进行了线性回归分析。 Abstract: Expanded perlite cladded by polymer modified cement-based composite materials is made into modified beads, and thermal insulation blocks are made out through adding modified beads to cement mortar. The water absorption, thermal conductivity and compressive strength of modified beads are tested, and polymer cement ratio is determined. The density, thermal conductivity, water absorption and changes in intensity of the thermal insulation blocks with different proportions of modified beads are studied, and the linear regression analysis between mixing ratio and thermal conductivity is carried out.

废旧轮胎橡胶颗粒在西北采暖地区外墙外保温抹面胶浆中应用

董素芬1，黄智德2

２０11年第5期

摘要

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摘要：根据西北采暖地区外保温抹面胶浆的性能要求，对废旧轮胎橡胶颗粒在水泥基材料中的已有研究进行了分析。分析研究表明，废旧轮胎橡胶颗粒能够提高抹面胶浆的抗开裂性、抗冲击性和抗冻性，并能增强其隔声效果和保温性能。指出了在应用研究中，应设置模拟环境试验测试抗裂性，选择简易型的抗冲击试验，并着重研究低温施工性能和质量。面对应用橡胶颗粒时需进行界面改性的难题，对比了已有研究中不同改性剂的实用性和经济性，确定了初步的试验方案，并指出应结合工程应用对改性剂的使用方法进行深入研究。 Abstract : According to the performance requirement of plaster mortar for external thermal insulation system in northwest region with heating provision, the existing research of waste tire rubber particles in cementitious materials are analyzed, and the results show that the waste tire rubber particles could increase the crack resistance, impact resistance, frost resistance of plaster mortar, and also can strengthen sound insulation and thermal insulation properties. Attentions in application research are pointed out including using simulated environment experiment to test crack resistance, choosing simple impact resistance experiment and discussing the construction performance and quality in low temperature. Facing the technical problems of interface modifying when rubber particles are in application, the practicability and economy of different modifiers in former study are compared, the tentative testing program is defined, and the use-method of modifiers should be studied in-depth combined with engineering applications.

压型钢板-混凝土组合楼板刚度的试验研究

白明杰，邵永健，翁晓红，佘热兵

２０11年第5期

摘要

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摘要：为研究压型钢板-混凝土组合楼板的刚度，进行了18块由YX75-200-600和YX76-344-688型压型钢板制作而成的混凝土组合楼板的载荷试验。通过分析试验结果及其受力性能，得到了其荷载-挠度关系曲线的变化规律、受力过程中三个阶段的受力特征、以及中和轴的变化规律；得到了端部栓钉、压型钢板板型及其厚度对刚度的影响规律，从而为该类型组合楼板刚度的理论分析及其工程应用提供试验依据。 Abstract: In order to study the rigidity of profiled steel sheeting-concrete composite slabs, loading tests for eighteen YX75-200-600 and YX76-344-688 cold profiled steel sheeting-concrete composite slabs are carried out. By analyzing the test results and the bearing performance of these specimens, the variation regularity of the load-deflection curves, the stress characteristics of three stages during the loading and the variation of central axis are obtained. Then the influence laws of the studs，the deck shape and thickness of profiled steel sheeting on the rigidity of composite slabs are analyzed, which provide the test foundation for theoretical analysis of rigidity and engineering application of this type of composite slabs.

碳纤维复合材加固钢筋混凝土受弯构件平面假设研究

史瑞英，赵志平，李占巧

２０11年第5期

摘要

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摘要：利用大型通用有限元软件ANSYS，对碳纤维片复合材加固钢筋混凝土T形梁的平面假设进行了研究，分析了各级荷载下横截面上的水平位移。分析结果表明，平面假设在所有情况下均是有效的。 Abstract： Using the large common finite element ANSYS software, the plane assumptions of cross section on strengthened reinforced concrete T-beam with carbon fiber reinforced polymer composite material are researched. Horizontal displacement on the cross section under loadings is analyzed. The results indicate that the plane assumptions of cross section under all situations are available.

低弹模聚丙烯纤维混凝土本构模型及力学性能研究

潘超，冯仲齐，陈凯

２０11年第5期

摘要

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摘要：利用聚丙烯纤维对混凝土的影响，选用对防渗墙、路基等有利的低弹模混凝土配合比，并同时兼顾混凝土强度、弹性模量、抗裂抗渗性能，做了本构模型和力学性能分析。结果表明，在混凝土中掺入一定量的聚丙烯纤维是克服混凝土开裂的有效途径，能够有效提高混凝土的延性，改善混凝土的变形性能。当水灰比为0.65，聚丙烯纤维掺量为0.9%时，低弹模混凝土的抗裂、防渗性能达到最优。 Abstract: Using the influence of polypropylene fiber on concrete, selecting a right mix-proportion with a low elastic modulus concrete for anti-permeability wall and road base, and considering the concrete strength, elastic modulus, crack-resistance and anti-permeability, the constitutive model and the analysis on mechanical properties are carried out. The results show that mixing a suitable amount of polypropylene fiber into concrete can overcome the concrete cracking, effectively improve the ductility of concrete and improve the deformation property of concrete. When the water-cement ratio is 0.65 and the dosage of polypropylene fiber is 0.9%, the crack-resistance and anti-permeability of low elastic modulus concrete can achieve an optimal performance.

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