房建材料及制品_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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房建材料及制品

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

引用本文

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

引用本文

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

引用本文

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

引用本文

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.

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