第七期_2014_《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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第七期

掺入废旧橡胶颗粒及废旧聚氨酯颗粒对水泥砂浆性能的影响

徐蕾，马青青

２０14年第7期

摘要

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摘要：研究了掺入废旧橡胶颗粒及废旧聚氨酯颗粒的改性水泥砂浆的机械性能和导热系数。以体积比0，10%和30%的废旧橡胶颗粒及废旧聚氨酯颗粒代替石英砂配制出几种改性砂浆，通过试验检测了橡胶颗粒及聚氨酯颗粒掺合物对新拌砂浆的质量、抗压强度、抗弯强度和导热性能的影响，并通过掺加石灰石粉末作为填料得到最优化的改性砂浆配比。结果表明，掺入橡胶颗粒及聚氨酯颗粒降低了材料的单位重量和导热系数，同时增强了隔热性能。的单位重量和导热系数，同时增强了隔热性能。Abstract:Themechanicalbehaviourandthermalconductivityofcementmortarwitheithersolerubber(SR)orpolyurethane(PU)wasteparticlesarestudied.Severalmortarmixturesarepreparedbyreplacingquartzsandwith0,10%,and30%ofeitherSRorPUpost-consumerplasticparticles.TheinfluencesofSRparticleorPUparticleonthequality,compressivestrength,flexuralstrengthandthermalconductivityofthefreshmortararetested.Anoptimizationofmortarmixtureproportionsiscarriedoutbyaddingalimestonepowderasfiller.ThestudyresultsshowthataddingtherubberparticlesandPUparticlesincementmortarcanreducebothunitweightandthethermalconductivityoftherawmortar,andreinforceitstheat-insulatingproperty.

利用冶炼钢渣配制蓄热混凝土

林丽娟1，缪正坤1，缪策2，王智勇1，张毅3

２０14年第7期

摘要

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摘要：选用热容大的玄武岩、冶炼钢渣为集料，硅酸盐水泥作为蓄热材料的胶凝剂，添加矿渣粉和硅微粉提高了蓄热材料力学性能，掺入一定比例石墨粉改善了蓄热材料热学性能，所制备的蓄热混凝土在200～500℃高温阶段抗压、抗折强度综合性能表现突出，在温差300～500℃，其平均比热为2272J/（kg·K），每m3蓄热混凝土的理论蓄热量可达335.75kWh。Abstract:Usingthelargeheatcapacitymaterials(basaltandsmeltingslag)asaggregateandPortlandcementasthegelatinizer,theheatstorageconcretewithgroundslagandsilicapowerforincreasingthemechanicalpropertiesofconcreteandacertainproportionofgraphitepowderforimprovingthethermalperformanceoftheheatstoragematerialisprepared.Thestudyresultsshowthatthecompressivestrengthandflexuralstrengthoftheheatstorageconcretearegreatin200～500℃,theaveragespecificheatoftheconcreteis2272J/(kg·K)in300~500℃,andthetheoreticalheatstoragevalueoftheconcreteis335.75kWh/m3.

加速老化条件下废砖对GRC耐久性影响研究

程海丽1，杨飞华2，佟明贺1

２０14年第7期

摘要

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摘要：采用50℃热水加速老化的方法，以抗折强度的变化为考察目标，研究了废砖取代天然砂、粉煤灰取代水泥对GRC耐久性的影响。结果表明，废砖取代GRC中天然砂对其耐久性有提高作用；粉煤灰在废砖及天然砂混合骨料GRC体系中对玻璃纤维的“保护”作用较在天然砂骨料GRC体系中强；废砖以45%的体积取代率取代天然砂，较之粉煤灰以20%质量取代率取代水泥对GRC的耐久性改善作用大，二者同时取代时较之单独取代效果好。 Abstract: By using the method of accelerating GRC ageing, the effects of waste brick and fly ash on the durability of GRC are researched. The results show that the durability of GRC can be improved when natural sand in GRC is replaced by waste brick. The improving effect of fly ash on the durability of GRC with waste brick aggregate is greater than the one with natural sand aggregate. The improving effect on the durability of GRC with natural sand replaced by 45% waste brick (volume fraction), is greater than the one with P·O cement replaced by 20% fly ash(mass fraction), and the effect is greater when natural sand and cement are replaced simultaneously by waste brick and fly ash with the replacement rate mentioned above.

鄂尔多斯体育馆斜筒柱施工技术

王梦圆1，闫勇先2

２０14年第7期

摘要

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摘要：以鄂尔多斯市体育中心体育馆工程为依据，分析了斜筒柱的关键施工技术的难点，针对该技术要点提出了相应的施工措施，同时还介绍了斜筒柱的施工技术，包括斜筒柱钢筋工程、模板及支撑架施工、混凝土工程。 Abstract: Based on the ordos sports center stadium project, the difficult points in the key construction technology of inclined cylinder are analyzed. The corresponding construction measures for the technical main points are put forward, and the construction technology of inclined cylinder including oblique cylinder steel bar engineering, template and support frame construction and the concrete engineering are introduced in detail.

筏形基础地下防水工程施工的技术措施分析

苏永波1，陈巧凤1，张志超2

２０14年第7期

摘要

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摘要：以解放军某博物馆工程为实例，针对筏板基础防水工程的设计与施工，提出了刚性防水加柔性防水的复合防水施工方案。工程实际表明，该方案防水效果良好且能够满足规范要求，施工操作也相对简单，并能有效保证地下室功能的安全。 Abstract: By the people's Liberation Army Museum project as an example, aiming at the design and construction of the raft foundation waterproof engineering, the composite waterproofing construction scheme of the rigid waterproof and flexible waterproof is put forward. Engineering practice shows that the scheme has good waterproof effect and can meet the requirements of correlative specification, and its construction operation is relatively simple, and it can effectively ensure the safety of the basement function.

建材行业标准《水泥制品工艺技术规程第6部分：先张法预应力混凝土管桩》编制简介

匡红杰1，魏从九2

２０14年第7期

摘要

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摘要：新制定的建材行业标准JC/T 2126.6-2012《水泥制品工艺技术规程第6部分：先张法预应力混凝土管桩》已于2013年6月1日实施。为了便于该标准的使用方准确理解标准条款的具体含义，正确贯彻实施标准条款的具体要求和规定，本文介绍了该标准的制定过程，并对标准的主要条款及其制定依据进行了解释和说明。 Abstract：The new building material industry standard of JC/T 2126.6-2012 Process technology specification for cement products Part 6: Pretensioned spun concrete piles was implemented on June 1, 2013. In order to accurately understand the meaning of standard provisions and implement the specific requirements of the standard provisions for user, the formulation process of the standard is introduced, meanwhile, the main provisions of the standard and its formulation basis are explained and illustrated.

PKPM与ANSYS联合求解钢筋混凝土井字梁竖向挠度

周清，周利娟，毛允波，张新鑫

２０14年第7期

摘要

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摘要：钢筋混凝土井字梁被广泛应用于各类建筑中。由于钢筋混凝土材料非线性的性质，通用结构设计软件PKPM不能很精确地得到荷载作用下井字梁结构的竖向挠度。本文以PKPM软件为主，针对某一井字梁工程实例，采用大型通用有限元软件辅助PKPM软件进行了非线性分析。本工程实例解决了由于PKPM软件本身缺点而引起的钢筋混凝土井字梁结构竖向挠度超限的问题，节约了材料，取得了一定的经济效益。 Abstract: Reinforced concrete grillage beam is widely used in various types of buildings. Because of nonlinearity of reinforced concrete materials, the general structure design PKPM software can't exactly figure out the vertical deflection of grillage beam structure under loading. Here, it takes a case of grillage beam engineering as example, the nonlinear analysis is carried on by large-scale general finite software assisted PKPM software. The engineering example can solve the vertical deflection transfinite question of reinforced concrete grillage beam structure cauced by disadvantage of PKPM software, and the method can save the material and also achieve some economic benefits.

受力状态下混凝土单梁复合加固技术研究

周乾，丁佳驹

２０14年第7期

摘要

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摘要：采用二次加荷的方法，探讨了钢筋混凝土单梁在受力状态下使用钢板和碳纤维布复合加固的技术。理论和试验数据吻合较好，结果较为理想，为该种类型结构加固提供了参考。 Abstract: Using the method of the secondary load, the steel plate and CFRP composite reinforcement technology for the reinforced concrete single beam under stress condition is discussed. The discussion result show that theory values are consistent with the experiment data and the technology can provide a reference for this kind of structure reinforcement.

自保温混凝土小型空心砌块砌体抗压强度及弹性模量的试验研究

尚德奎，孙伟民，陈海

２０14年第7期

摘要

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摘要：对三组27个自保温混凝土砌块试件进行了抗压强度和弹性模量的试验研究，试验结果表明，自保温混凝土砌块砌体的受压破坏过程分为三个阶段，与普通混凝土砌块砌体的受压破坏过程类似；自保温混凝土砌块砌体的初裂荷载约为破坏荷载的70%，表现出了明显的脆性特征。 Abstract: The compressive strength and elastic modulus of 3 groups of 27 self-insulation concrete block specimen was tested and investigated. The test results show that the compression failure process of self-insulation concrete block is divided into three stages, which is similar to that of the ordinary concrete block. In addition, the initial crack load of the self-insulation concrete block is about 70% of the failure load of the concrete block, which shows an obvious brittleness characteristic.

玻化微珠混凝土实心砖物理及砌体力学性能试验研究

陈瑜，孙补

２０14年第7期

摘要

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摘要：采用玻化微珠作为主要轻细集料，与水泥、砂石、水拌制混凝土，通过正交试验选出最优配合比方案，制作成承重砖进行了各项物理力学性能试验及砌体力学性能试验。结果表明，其各项物理力学性能均符合混凝土实心砖的技术要求，同时该砖具有轻质、保温等特性，对提高建筑节能具有重要意义。砌体力学性能试验结果中，砌体轴心抗压强度计算值与规范中混凝土砌块相近，为了更好的拟合，对α给出了建议值；抗剪强度计算值略小于实测平均值，符合规范要求。 Abstract: The concrete is prepared by using the glazed hollow bead selected as the main fine aggregate, cement, gravel,water and so on. Some tests of the physical and mechanical properties and masonry mechanical properties on the load-bearing bricks made using the optimal mixing proportion got by the orthogonal experiment are carried out. The results show that all the physical and mechanical properties can conform to the technical requirements of the solid concrete brick, meanwhile, the birick has the features such as lightweight and thermal insulation, which is a great significance for improving building energy saving. The results of masonry mechanical properties test indicate that the calculation value of masonry axial compressive strength is closed to the calculated value of concrete block in specification. In order to get the better fitting, the suggestive value of α is given. The calculation value of shear strength is slightly smaller than the average of measuring value, and it conforms to the requirements of the specification.

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