第九期_2022_《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

橡胶混凝土力学性能与耐久性能研究进展

郑邦容1，唐延丰2，李佳骏2，范灿俊2，张敏2

2022年第9期

摘要

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摘要：介绍了国内外有关橡胶混凝土力学性能与耐久性能的研究进展，得出了掺入橡胶颗粒后混凝土的力学性能降低，而耐久性能改善的结论，提出了橡胶混凝土的未来研究方向。 Abstract: The research progress on the mechanical properties and durability of rubber concrete at home and abroad is introduced, and the conclusion that the mechanical properties of concrete are reduced after adding rubber particles, but the durability is improved is drawn, and the future research direction of rubber concrete is proposed.

郑邦容,唐延丰,李佳骏,等.橡胶混凝土力学性能与耐久性能研究进展[J].混凝土与水泥制品,2022(9):88-91. ZHENG B R,TANG Y F,LI J J,et al.Research Progress on Mechanical Properties and Durability of Rubber Concrete[J].China Concrete and Cement Products,2022(9):88-91.

混合再生细骨料水泥砂浆性能试验研究

马加存1，杨永富2，段淑芸1，张晓萌2，迟朝明3，葛智4，庄培芝4

2022年第9期

摘要

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摘要：研究了废弃混凝土和废弃黏土砖制成的混合再生细骨料的掺量（0、30%、60%、100%）和预湿时长（0、1/6 h、24 h）对砂浆流动性、抗压强度、抗折强度和干燥收缩性能的影响。结果表明：砂浆的初始流动度和流动度经时损失率随着再生细骨料掺量和预湿时长的增加而降低；随着再生细骨料掺量的增加，砂浆的抗压强度降低，抗折强度变化较小；砂浆的抗压、抗折强度随着再生细骨料预湿时长的增加呈增大趋势；由于再生细骨料的内养护作用，砂浆的干燥收缩量随再生细骨料掺量和预湿时长的增加呈减小趋势。 Abstract: The effects of the content (0, 30%, 60%, 100%) and pre-wetting time (0, 1/6 h, 24 h) of mixed recycled fine aggregate made from waste concrete and waste clay bricks on the fluidity, compressive strength, flexural strength and drying shrinkage properties of mortar were studied. The results show that the initial fluidity and fluidity loss rate of mortar decrease with the increase of recycled fine aggregate content and pre-wetting time. With the increase of recycled fine aggregate content, the compressive strength of mortar decreases, and the change of flexural strength is small. The compressive and flexural strengths of mortar tend to increase with the increase of pre-wetting time of recycled fine aggregate. Due to the internal curing effect of recycled fine aggregate, the drying shrinkage of mortar decreases with the increase of recycled fine aggregate content and pre-wetting time.

马加存,杨永富,段淑芸,等.混合再生细骨料水泥砂浆性能试验研究[J].混凝土与水泥制品,2022(9):92-94,105. MA J C,YANG Y F,DUAN S Y,et al.Experimental Study on the Properties of Mixed Recycled Fine Aggregate Mortar[J].China Concrete and Cement Products,2022(9):92-94,105.

碱激发矿粉-粉煤灰混凝土耐久性能试验研究

任君1，王允波2，徐伟伟2，张思雨2，王玉璞2，王腾2

2022年第9期

摘要

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摘要：研究了激发剂模数、养护方式和粉煤灰掺量对机制砂碱激发混凝土（MAAC）耐久性能的影响。结果表明：与20 ℃标养相比，60 ℃蒸养MAAC的收缩率降低明显，耐久性能增强；掺入20%粉煤灰后，MAAC的收缩性能有所改善，抗硫酸盐侵蚀性能有所减弱，但在蒸养条件下，掺入20%粉煤灰可以在一定程度上提高MAAC的抗氯离子侵蚀能力；随着碱激发剂模数由2.0降至1.8，MAAC的耐久性能有所增强。 Abstract: The effects of activator modulus, curing method and fly ash content on the durability of manufactured sand alkali-activated concrete(MAAC) were studied. The results show that compared with the standard curing at 20 ℃, the shrinkage rate of MAAC in steam curing at 60 ℃ is significantly reduced, and the durability is enhanced. After adding 20% fly ash, the shrinkage performance of MAAC is improved, the resistance to sulfate corrosion is weakened, but under steam curing conditions, adding 20% fly ash can improve the chloride ion corrosion resistance of MAAC to a certain extent. The durability of MAAC is enhanced with the decrease of alkali activator modulus from 2.0 to 1.8.

任君,王允波,徐伟伟,等.碱激发矿粉-粉煤灰混凝土耐久性能试验研究[J].混凝土与水泥制品,2022(9):95-98. REN J,WANG Y B,XU W W,et al.Experimental Study on Durability of Alkali-activated Mineral Powder and Fly Ash Concrete[J].China Concrete and Cement Products,2022(9):95-98.

建筑垃圾再生骨料改性技术研究进展

王亚松1，覃铃玲1，李松2，谢颉3，段平1

2022年第9期

摘要

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摘要：合理使用再生骨料有助于节约资源和改善环境，但再生骨料存在形状不规则、吸水率高、压碎指标大等问题，直接用到混凝土中会劣化混凝土的性能。对再生骨料进行改性可在一定程度上减小其与天然骨料之间的差距，从而减轻其对混凝土性能的不利影响。通过物理强化技术、化学强化技术和微生物矿化技术改性再生骨料的作用机理和改性效果介绍，为再生骨料在混凝土中的合理应用提供借鉴。 Abstract: The rational use of recycled aggregates can help save resources and improve the environment. However, recycled aggregates have problems such as irregular shape, high water absorption, and large crushing index. Direct use of recycled aggregates in concrete will deteriorate the performance of concrete. The modification of recycled aggregates can reduce the gap between recycled aggregates and natural aggregates to some extent, so as to reduce its adverse impact on the performance of concrete. The action mechanism and modification effect of modified recycled aggregates by physical strengthening technology, chemical strengthening technology and microbial mineralization technology are introduced, which can provide a reference for rational application of recycled aggregates in concrete.

王亚松,覃铃玲,李松,等.建筑垃圾再生骨料改性技术研究进展[J].混凝土与水泥制品,2022(9):99-105. WANG Y S,QIN L L,LI S,et al.Research Progress on Modification Technology of Construction Waste Recycled Aggregates[J].China Concrete and Cement Products,2022(9):99-105.

港口在役混凝土结构的检测维护框架模型分析

张灵灵1，王海超1,2，姜佩弦1

2022年第9期

摘要

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摘要：基于港口在役混凝土结构的劣化过程和劣化状态建立了耐久性评定等级，从耐久性、经济性和可持续性角度对结构进行了层次化评价，其中，耐久性评估值N1包括结构形式和劣化指标评估值，采用加权平均法得到；经济性评估值N2包括日常检测维护成本、失效状态成本和经济损失成本，采取指标权重法确定；可持续性评估值N3选用指数函数进行计算；耐久性、经济性和可持续性指标的评估因子通过0-1强制评分法确定为1/2、1/3和1/6，经过加权得到了结构的层次化评估值。在层次化评估值的基础上给出了结构的检测维护框架模型，并通过某港口地区的在役混凝土桥梁结构验证了该框架模型的合理性。 Abstract: The durability evaluation grade is established based on the deterioration process and deterioration state of the in-service concrete structure in ports, and the structure is evaluated from the perspectives of durability, economy and sustainability. The durability evaluation value N1 includes the structural form and deterioration index evaluation value, which is obtained by weighted average method. Economic evaluation value N2 includes daily inspection and maintenance cost, failure state cost and economic loss cost, which is determined by index weight method. The sustainability evaluation value N3 is calculated by exponential function. The evaluation factors of durability, economy and sustainability indicators are determined as 1/2, 1/3 and 1/6 by 0-1 compulsory scoring method, and the hierarchical evaluation value of the structure is obtained by weighting. Based on the hierarchical evaluation value, the frame model of structure inspection and maintenance is given, and the rationality of the frame model is verified by the in-service concrete bridge structure in a port area.

张灵灵,王海超,姜佩弦.港口在役混凝土结构的检测维护框架模型分析[J].混凝土与水泥制品,2022(9):82-87,91. ZHANG L L,WANG H C,JIANG P X.Analysis of Frame Model for Inspection and Maintenance of In-service Concrete Structure in Ports[J].China Concrete and Cement Products,2022(9):82-87,91.

层状结构轻质隔热水泥基材料的吸波性能

解帅1，贾治勇2，曹延鑫1，冀志江1，司甜甜1，王静1

2022年第9期

摘要

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摘要：以纳米炭黑和膨胀珍珠岩为吸波剂和轻骨料，设计制备了层状结构轻质水泥基复合材料，采用弓形反射法研究其对X波段的微波吸收性能，并对其导热系数进行了测试。结果表明：与传统的阻抗渐变多层结构相比，所制备的层状结构水泥基材料具有更好的微波吸收性能，对X波段的电磁波反射率小于-15 dB；所制备的层状结构轻质水泥基复合材料具有显著的保温隔热功效。 Abstract: Layered structured lightweight cement-based composite was designed and fabricated using carbon black and expanded perlite as electromagnetic wave absorbent and lightweight aggregates. The electromagnetic wave absorption properties were studied by arching reflected method, and the thermal conductivity coefficient was tested. The results indicate that the prepared layered structured cement-based composites exhibit better electromagnetic wave absorption properties than the traditional gradient multi-layer structured cement-based composites. The reflectivity of layered structured cement-based composites can be less than -15 dB in the whole X-band. The prepared layered structured lightweight cement-based composites possess remarkable thermal insulation function.

解帅,贾治勇,曹延鑫,等.层状结构轻质隔热水泥基材料的吸波性能[J].混凝土与水泥制品,2022(9):62-65. XIE S,JIA Z Y,CAO Y X,et al.Electromagnetic Wave Absorbing Properties of Layered Structured Thermal Insulation Lightweight Cement-based Materials[J].China Concrete and Cement Products,2022(9):62-65.

高强灌浆材料的制备及性能研究

王恒1，王朝1，李伟1，张斌1，姜斌1，尹海军1，虎长军1，李宁1，何苏元1，包金瑛1，明阳2

2022年第9期

摘要

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摘要：采用三级配河砂设计优化了高强灌浆材料的配合比，研究了水胶比、胶砂比和不同材料组成对灌浆材料工作性和力学性能的影响，分析了钙矾石型复合膨胀剂和塑性膨胀剂对灌浆材料收缩性能的影响。结果表明：当水胶比为0.20、胶砂比为1.0、硅灰掺量为10%、降黏剂掺量为10%、减水剂掺量为1.0%、钙矾石型复合膨胀剂掺量为10%、塑性膨胀剂掺量为0.01%、钢纤维体积掺量为1.5%时，可制备出性能优异的高强灌浆材料，有效缓解灌浆材料的收缩问题。 Abstract: The mix proportion of high strength grouting material was designed by using three-grade sand design method. The effects of water-binder ratio, binder-sand ratio and different material compositions on the workability and mechanical properties of grouting material were studied, and the effects of ettringite-type composite expansion agent and plastic expansion agent on the shrinkage properties of grouting material were analyzed. The results show that when the water-binder ratio is 0.20, the binder-sand ratio is 1.0, the silica fume content is 10%, the viscosity reducer content is 10%, the water reducing agent content is 1.0%, the ettringite-type composite expansion agent content is 10%, the plastic expansion agent content is 0.01%, and the volume content of steel fiber is 1.5%, the high strength grouting material with excellent performance can be prepared, which can effectively alleviate the shrinkage problem of the grouting material.

王恒,王朝,李伟,等.高强灌浆材料的制备及性能研究[J].混凝土与水泥制品,2022(9):66-69. WANG H,WANG C,LI W,et al.Study on the Preparation and Performance of High Strength Grouting Materials[J].China Concrete and Cement Products,2022(9):66-69.

陶粒混凝土超长内隔墙条板的受力性能研究

邹新兴，王昌远，王安涟，嵇佳龙，刘雁

2022年第9期

摘要

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摘要：为了解决小宽度预制装配陶粒混凝土墙板的开裂问题，研制了高3 500 mm、长5 000 mm、厚200 mm的超长陶粒混凝土墙板，对该墙板进行了抗弯、抗冲击和吊挂力试验，分析了墙板在均布荷载下的受弯荷载-应变（挠度）曲线、破坏现象以及抗冲击和吊挂试验现象。结果表明：墙板的抗弯性能、抗冲击性能和吊挂性能均达到相关规范要求；依据现有混凝土受弯理论计算得到的墙板受弯承载力和挠度与试验值吻合良好；推导出的墙板最大冲击力远小于其冲击承载力，与试验现象相符。 Abstract: In order to solve the cracking problem of small width precast ceramsite concrete partition slab, the super-long ceramsite concrete partition slab with the height of 3 500 mm, the length of 5 000 mm and the thickness of 200 mm was developed. The bending, impact and hanging force tests of the partition slab were carried out, and the bending load-strain (deflection) curve, failure phenomenon, impact and hanging test phenomenon of the partition slab under uniformly distributed load were analyzed. The results show that the bending resistance, impact resistance and hanging performance of the partition slab meet the requirements of relevant specifications. According to the existing concrete bending theory, the calculated bending capacity and deflection of the partition slab are in good agreement with the experimental values. The maximum impact force of the partition slab deduced is far less than its impact bearing capacity, which is consistent with the experimental phenomenon.

邹新兴,王昌远,王安涟,等.陶粒混凝土超长内隔墙条板的受力性能研究[J].混凝土与水泥制品,2022(9):70-76. ZOU X X,WANG C Y,WANG A L,et al.Study on Mechanical Behavior of Ceramsite Concrete Super-long Internal Partition Slabs[J].China Concrete and Cement Products,2022(9):70-76.

超高强复合灌浆料的断裂性能研究

郦湫翰1，王庆敏1，李政达 1，翁佳奇 2，王振宇1

2022年第9期

摘要

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摘要：为了研究超高强复合灌浆料的断裂性能，制作了不同尺寸的缺口三点弯曲梁试件，测试了断裂性能，并对双K断裂模型和尺寸效应模型进行了对比分析。结果表明：超高强复合灌浆料的起裂韧度与失稳韧度较为接近，裂缝稳定扩展的过程较短；根据双K模型计算得出不同尺寸试件的断裂韧度值基本一致，无明显的尺寸效应；根据尺寸效应模型计算得出的断裂韧度和双K模型计算得出的断裂韧度基本一致。 Abstract: In order to study the fracture properties of ultra-high strength composite grouting material, three-point bending beam specimens with different sizes were made, and their fracture properties were tested, and the double-K fracture model and size effect model were compared and analyzed. The results show that the fracture toughness and instability fracture toughness of the ultra-high strength composite grouting material are close, and the process of fracture stable expansion is short. The fracture toughness of different size specimens calculated by double-K model is basically the same, and there is no obvious size effect. The fracture toughness calculated by size effect model is basically the same as that calculated by double-K model.

郦湫翰,王庆敏,李政达,等.超高强复合灌浆料的断裂性能研究[J].混凝土与水泥制品,2022(9):77-81. LI Q H,WANG Q M,LI Z D,et al.Fracture Performance of Ultra-high Strength Composite Grouting Materials[J].China Concrete and Cement Products,2022(9):77-81.

硅灰对超高性能混凝土性能提升机理试验研究

樊俊江

2022年第9期

摘要

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摘要：研究了不同硅灰掺量对超高性能混凝土（UHPC）拌合物性能、力学性能的影响，并通过水化程度、孔结构、界面黏结强度等微观测试方法探讨了硅灰对UHPC性能的提升机理。结果表明，掺入硅灰可从微观和细观层面促进水泥水化、优化孔结构、提升钢纤维与浆体的黏结性能，从而提升UHPC的力学性能。当硅灰掺量在20%范围内时，提升效果随着硅灰掺量的增加而增大；当硅灰掺量超过20%时，硅灰的高需水量特性开始显现，使得UHPC拌合物的黏度大幅增加，不利于浇筑成型和气泡排出，使UHPC内部缺陷增多导致其抗压强度下降；硅灰在UHPC中的推荐掺量为10%~20%。 Abstract: The effects of different silica fume content on the mixture properties and mechanical properties of ultra-high performance concrete(UHPC) were studied, and the improvement mechanism of silica fume on the properties of UHPC was analyzed by micro-testing methods such as hydration degree, pore structure and interfacial bond strength. The results show that the addition of silica fume can promote the hydration of cement in UHPC, optimize the pore structure, and improve the bonding performance between steel fiber and slurry, so as to improve the mechanical properties of UHPC. The improvement effect increases with the increase of silica fume content in the range of 20%. When the silica fume content is over 20%, the characteristics of high water demand of silica fume begins to appear. The viscosity of UHPC mixture increases greatly, which is not conducive to pouring molding and pore discharge. The increase of internal defects leads to the decrease of compressive strength. The recommended content of silica fume in UHPC is 10%~20%.

樊俊江.硅灰对超高性能混凝土性能提升机理试验研究樊俊江[J].混凝土与水泥制品,2022(9):50-53,61. FAN J J.Experimental Study on Performance Improvement Mechanism of Silica Fume on Ultra-high Performance Concrete(UHPC)[J].China Concrete and Cement Products,2022(9):50-53,61.

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