第六期_2021_《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

活性激发再生砖粉对UHPC力学性能的影响

杜明芳，赵永强，遆永新，尚静静

2021年第6期

摘要

引用本文

摘要：利用物理、化学、高温方式对再生砖粉进行了活性激发，测试其活性指数，并研究了活性最高再生砖粉的取代率对超高性能混凝土（UHPC）抗压性能、抗折性能和劈裂抗拉性能的影响。结果表明：物理、化学、高温方式均有助于激发再生砖粉的活性，其中，球磨45 min再生砖粉的活性最高，为71.4%；再生砖粉UHPC的力学性能与再生砖粉取代率呈负相关；当再生砖粉取代率为10%时，再生砖粉UHPC的力学性能接近基准组。 Abstract: The physical, chemical and high temperature methods were used to activate the recycled brick powder, and its activity index was tested, and the effect of the replacement rate of the most active recycled brick powder on the compressive, flexural and split tensile properties of UHPC was studied. The results show that the physical, chemical and high temperature methods are helpful to stimulate the activity of recycled brick powder, and the activity of recycled brick powder is the highest at 71.4% by ball milling for 45 min. The mechanical properties of recycled brick powder UHPC are negatively correlated with the replacement rate of recycled brick powder. When the recycled brick powder replacement rate is 10%, the mechanical properties of recycled brick powder UHPC are close to those of the reference group.

杜明芳,赵永强,遆永新,等.活性激发再生砖粉对UHPC力学性能的影响[J].混凝土与水泥制品,2021(6):91-94. DU M F,ZHAO Y Q,TI Y X,et al.Effect of Activated Recycled Brick Powder on Mechanical Properties of UHPC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):91-94.

工程渣土陶粒多孔混凝土力学与植生性能研究

辛晓斌1，李骁男1，刘永川1，李磊2，张腾飞3，马炎1，刘锦涛4

2021年第6期

摘要

引用本文

辛晓斌,李骁男,刘永川,等.工程渣土陶粒多孔混凝土力学与植生性能研究[J].混凝土与水泥制品,2021(6):95-98. XIN X B,LI X N,LIU Y C,et al.Study on Mechanical and Planting Performance of Engineering Residue Ceramsite Porous Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):95-98.

再生混凝土配合比优化设计

王立波，赵军

2021年第6期

摘要

引用本文

摘要：研究了再生骨料替代率、聚丙烯纤维和钢纤维掺量对再生混凝土性能的影响。结果表明：替代率为30%的再生细骨料对混凝土的密度、和易性以及抗压强度无显著的负面影响；一定掺量的纤维对混凝土的工作性无显著影响，但能有效提高再生混凝土的劈裂抗拉强度和抗折强度，改善混凝土的抗裂性和脆性。 Abstract: The effects of recycled aggregate replacement rate, polypropylene fiber and steel fiber content on the properties of recycled concrete were studied. The results show that the recycled fine aggregate with a replacement rate of 30% has no significant negative effect on the density, workability and compressive strength of concrete. A certain amount of fiber has no significant effect on the workability of concrete, but it can effectively improve the splitting tensile strength and flexural strength of recycled concrete, and improve the cracking resistance and brittleness of concrete.

王立波,赵军.再生混凝土配合比优化设计[J].混凝土与水泥制品,2021(6):99-102. WANG L B,ZHAO J.Optimization Design of Mix Proportion of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):99-102.

装配式建筑套筒灌浆缺陷检测方法及研究进展

姚丹丹1，吕孝华2

2021年第6期

摘要

引用本文

摘要：套筒灌浆连接是装配式建筑中钢筋的最主要和应用最广泛的一种连接方法，通过分析灌浆缺陷对连接件、构件以及结构性能的影响，总结了装配式建筑中钢筋连接套筒灌浆缺陷的不同检测方法，并归纳了灌浆缺陷的改进方法。灌浆缺陷的主要检测方法有：超声波法、X射线法、内窥镜法、冲击回波法、预埋钢丝法、压电陶瓷材料检测法、电阻法、预埋传感器法、神经网络检测法和毛细管注水法。从设备到施工方法的改进措施包括定量控制装置、缺陷可检修型灌浆套筒和扩孔注射补灌。在实际工程中，可以先采用超声波法快速检测灌浆缺陷，然后结合内窥镜法检测灌浆缺陷尺寸，最后采取扩孔注射补灌方式进行缺陷补救。 Abstract: Sleeve grouting connection is the main and the most extensive connection method for steel reinforcement in prefabricated building. By analyzing the influence of grouting defects on the properties of connectors、components and structures, the detection methods of grouting defects and the improvement methods of grouting defects are summarized. The main detection methods of grouting defects include ultrasonic method, X-ray method, endoscope method, impact echo method, embedded steel wire method, piezoelectric ceramic material detection method, resistance method, embedded sensor method, neural network detection and capillary water injection method. Improvement measures from equipment to construction methods include quantitative control device, defect repairable grouting sleeve and reaming injection filling. In practical projects, the ultrasonic method can be used to quickly detect the grouting defects, and then the size of grouting defects can be detected in combination with the endoscope method, and finally the flaw repair can be carried out by means of reamed injection irrigation.

姚丹丹,吕孝华.装配式建筑套筒灌浆缺陷检测方法及研究进展[J].混凝土与水泥制品,2021(6):85-90. YAO D D,LYU X H.Defect Detection Methods and Research Progress of Sleeve Grouting Defects in Prefabricated Buildings[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):85-90.

秸秆夹芯复合外挂墙板的制备及抗风承载力研究

肖力光，李纪良

2021年第6期

摘要

引用本文

摘要：利用秸秆纤维、粉煤灰及硅藻土制备了夹芯复合外挂墙板，研究了秸秆纤维长度、粉煤灰和硅藻土协同作用对秸秆水泥基材料力学性能的影响，确定了粉煤灰及硅藻土的预处理方式，通过正交试验确定了粉煤灰、硅藻土取代水泥的最佳取代率及水灰比；利用ANSYS有限元软件对秸秆夹芯复合外挂墙板的抗风承载力进行了数值模拟，分析了不同墙板厚度及钢丝含量对秸秆夹芯外挂墙板抗风承载力的影响。结果表明：随着秸秆纤维掺量的增加，试件抗压强度逐渐下降，其中，秸秆纤维长度为5~10 mm时，秸秆水泥基材料的力学性能最佳；粉煤灰、硅藻土的最佳取代率分别为10%、4%，最佳水灰比为0.48；秸秆夹芯外挂墙板的抗风承载力满足规范要求，增加墙板厚度及改变钢丝布置方式均能提高秸秆夹芯复合外挂墙板的抗风承载力，且改变钢丝布置对抗风承载力的影响显著。 Abstract: The straw fiber, fly ash and diatomite were used to prepare sandwich composite external wallboard, and the effect of straw fiber length, fly ash and diatomite on the properties of straw cement-based materials was studied, and the preprocessing method of fly ash and diatomite was determined. The optimal replacement rate of fly ash and diatomite to replace cement and water-cement ratio were determined by orthogonal test. The wind resistance bearing capacity of straw sandwich composite wallboard was simulated by ANSYS software, and the influence of wall thickness and steel wire content on the wind resistance bearing capacity of straw sandwich external wallboard was analyzed. The results show that with the increase of the straw fiber content, the compressive strength decreases gradually. When the straw fiber length is 5~10 mm, the mechanical properties of straw cement-based materials are the best. The optimal replacement rate of fly ash and diatomite is 10% and 4% respectively, and the optimal water-cement ratio is 0.48. The wind resistance bearing capacity of straw sandwich external wallboard meets the requirements of the code. The wind resistance bearing capacity of straw sandwich external wallboard can be improved by increasing the wallboard thickness and changing the steel wire arrangement, and the effect of changing the steel wire arrangement on the wind resistance bearing capacity is significant.

肖力光,李纪良.秸秆夹芯复合外挂墙板的制备及抗风承载力研究[J].混凝土与水泥制品,2021(6):65-69. XIAO L G,LI J L.Preparation and Wind Resistance Bearing Capacity of Straw Sandwich External Wall Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):65-69.

矩形螺旋箍筋混凝土短柱力学性能试验研究

魏兴娜，李江华，徐晓，郝文秀

2021年第6期

摘要

引用本文

摘要：设计制作了5根配置矩形螺旋箍筋的混凝土短柱和3根配置普通箍筋的混凝土短柱，研究了混凝土强度、箍筋间距对构件极限承载力、力学性能的影响，在试验的基础上，利用ANSYS有限元软件对混凝土短柱进行了静力非线性分析。结果表明：与普通箍筋混凝土短柱相比，矩形螺旋箍筋混凝土短柱的极限承载力和抗变形能力有所提高；箍筋间距越小，其对混凝土短柱的约束效果越好；混凝土强度等级越高，构件的极限承载力越大；有限元分析结果与试验结果基本一致。 Abstract: Five concrete short columns with rectangular spiral stirrups and three concrete short columns with ordinary stirrups were designed, and the effects of concrete strength and stirrup spacing on the ultimate bearing capacity and mechanical properties of concrete short columns were studied. Based on the test, the static nonlinear analysis of concrete short columns was carried out by using ANSYS finite element software. The results show that compared with concrete short columns with ordinary stirrups, the ultimate bearing capacity and anti deformation capacity of concrete short columns with rectangular spiral stirrups are improved. The smaller the stirrup spacing, the better the restraint effect. The higher the concrete strength grade, the greater the ultimate bearing capacity. The analysis results are basically consistent with the test results.

魏兴娜,李江华,徐晓,等.矩形螺旋箍筋混凝土短柱力学性能试验研究[J].混凝土与水泥制品,2021(6):70-75. WEI X N,LI J H,XU X,et al.Experimental Study on Mechanical Properties of Concrete Short Columns with Rectangular Spiral Stirrups[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):70-75.

膨胀剂掺量及套箍系数对钢管混凝土轴压柱承载力的影响

程阿青1，刘骁帆2，胡浪2，曹新明3

2021年第6期

摘要

引用本文

摘要：通过18根外径分别为219 mm和273 mm试件的轴压试验及227根试件的有限元模拟分析，探讨了膨胀剂掺量及套箍系数对试件承载力的影响。结果表明：添加膨胀剂后，初始紧箍力增大，钢管和混凝土迅速进入协同工作状态，有效提高了钢管混凝土的承载力；膨胀剂掺量过大会导致钢管混凝土的横向应力增加，承载力降低；当膨胀剂掺量为5%时，屈服承载力和极限承载力的提高幅度最大，分别为11.9%和49.85%；添加膨胀剂的钢管混凝土柱承载力及延性随着套箍系数的增加而提高；提出的承载力计算公式可满足工程实际应用。 Abstract: Through the axial compression test of 18 specimens with 219 mm and 273 mm outer diameter and the finite element simulation analysis of 227 specimens, the influence of expansive agent content and hoop coefficient on the bearing capacity of the specimens was discussed. The results show that after adding expansive agent, the initial hoop force increases, the steel tube and concrete quickly enter the cooperative working state, and the bearing capacity of concrete filled steel tube is effectively improved. When the expansive agent content is too large, the transverse stress of concrete filled steel tube increases and the bearing capacity decreases. When the expansive agent content is 5%, the yield bearing capacity and ultimate bearing capacity increase by 11.9% and 49.85% respectively. The bearing capacity and ductility of concrete filled steel tube columns with expansive agent increase with the increase of stirrup coefficient. The calculation formula of the bearing capacity can meet the engineering application.

程阿青,刘骁帆,胡浪,等.膨胀剂掺量及套箍系数对钢管混凝土轴压柱承载力的影响[J].混凝土与水泥制品,2021(6):76-79,84. CHENG A Q,LIU X F,HU L,et al.Influence of Expansive Agent Content and Hoop Coefficient on Bearing Capacity of Concrete Filled Steel Tube Columns Under Axial Compression[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):76-79,84.

装配式墙板BIM模型自动生成的二次开发研究

施丁平1，孙丰1，李樊2，汪德江2，朱江2

2021年第6期

摘要

引用本文

摘要：采用Revit二次开发技术，对PC装配式墙板的BIM模型自动生成功能进行了研究。根据墙板的各种参数，建立了墙板外形与配筋的BIM模型，实现了装配式墙板一键参数化建模，为装配式与BIM的结合提供了快速生成BIM模型的技术与方法。 Abstract: Using the secondary development technology of Revit, the BIM model automatic generation function of the prefabricated wall was studied. According to various parameters of the wall, the BIM model of the shape and reinforcement of the wall can be generated, which provides a technique and method for rapid generation modeling for the combination of prefabricated building and BIM.

施丁平,孙丰,李樊,等.装配式墙板BIM模型自动生成的二次开发研究[J].混凝土与水泥制品,2021(6):80-84. SHI D P,SUN F,LI F,et al.Research on Secondary Development of Prefabricated Walls Based on BIM[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):80-84.

钢-PVA混杂纤维再生混凝土梁抗弯性能试验研究

苏骏1,2，赵家玉1，李磊1

2021年第6期

摘要

引用本文

苏骏,赵家玉,李磊.钢-PVA混杂纤维再生混凝土梁抗弯性能试验研究[J].混凝土与水泥制品,2021(6):50-55. SU J,ZHAO J Y,LI L.Experimental Study on Flexural Behavior of Steel-PVA Hybrid Fiber Reinforced Recycled Concrete Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):50-55.

基于正交试验的纤维增强水泥基复合材料研究

陈剑敏，石建光，胡红梅，刘涛

2021年第6期

摘要

引用本文

摘要：采用正交试验法研究了水胶比、矿粉掺量、纤维掺量和种类对不同配合比纤维增强水泥基复合材料抗折强度、抗压强度和稠度的影响。结果表明：当水胶比为0.25，矿粉掺量为胶凝材料的15%，PVA纤维体积分数为1.5%时，所制备的纤维增强水泥基复合材料的综合性能最优，28 d抗折强度为13.84 MPa，28 d抗压强度为100.10 MPa，稠度为75 mm。 Abstract: The effects of water-binder ratio, mineral powder content, fiber content and types on the flexural strength, compressive strength and consistency of fiber reinforced cement-based composite materials with different mix proportions were studied by orthogonal test method. The results show that when the water-binder ratio is 0.25, the mineral powder content is 15% and the PVA fiber volume fraction is 1.5%, the comprehensive properties of the fiber reinforced cement-based composite materials are the best, and the 28 d flexural strength is 13.84 MPa, the 28 d compressive strength is 100.10 MPa and the consistency is 75 mm.

陈剑敏,石建光,胡红梅,等.基于正交试验的纤维增强水泥基复合材料研究[J].混凝土与水泥制品,2021(6):56-59,64. CHEN J M,SHI J G,HU H M,et al.Research on Fiber Reinforced Cement-based Composite Materials Based on Orthogonal Test Method[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):56-59,64.

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