混凝土研究_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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混凝土研究

水泥基材料3D打印人工鱼礁建造技术研究

张清芳1，沈璐1,2，田涛2,3，张年华2,3

2022年第8期

摘要

引用本文

摘要：从技术性、经济性、生态效应等方面分析了水泥基材料3D打印技术用于人工鱼礁建造的可行性，对比分析了水泥基材料3D打印人工鱼礁与传统模板建造工艺在生产效率、成本结构及经济环境效益方面的差异。并以某人工鱼礁建造工程为背景，制定了具体的3D打印预制块制造方案，进行了工程造价计算。结果表明，与传统模板建造工艺相比，3D打印工艺在建造成本以及工期方面分别节省和缩短了12.21%和26.00%。 Abstract: From the point of technical, economic, ecological aspects, the feasibility of 3D printing technology of cement-base material in the construction of artificial reefs was analyzed, the differences between 3D printing of cement-based materials for artificial reefs and traditional modules manufacturing in productivity, cost structure, and economical of environmental benefits were compared. And a 3D printed prefabricated block construction scheme was developed and the engineering cost calculation was carried out for an artificial reef construction project as an example. The results show that compared with the traditional construction method, the construction cost and duration can save 12.21% and 26.00% respectively by the 3D printing method.

张清芳,沈璐,田涛,等.水泥基材料3D打印人工鱼礁建造技术研究[J].混凝土与水泥制品,2022(8):1-5. ZHANG Q F,SHEN L,TIAN T,et al.Research on Construction Technology of Cement-based Material 3D Printing Artificial Reef[J].China Concrete and Cement Products,2022(8):1-5.

污水环境中混凝土的微生物腐蚀与防腐措施

朱正宇1，曾有旭1，刘虎山2，储洪强1，张超2，郭文慧1，马宇晖2，蒋袁园1，赵维1，陈剑宏1

2022年第8期

摘要

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摘要：概述了污水环境中混凝土微生物腐蚀的研究现状和侵蚀机理，介绍了评定混凝土微生物侵蚀程度的试验方法，并论述了防腐措施的有效性和可行性，可为后续混凝土微生物腐蚀机制和防腐技术的深入研究以及相关规范和标准的建立提供参考。 Abstract: The research status and corrosion mechanism of concrete microbial corrosion in sewage environment are summarized. The test method for evaluating the degree of concrete microbial corrosion is introduced, and the effectiveness and feasibility of anticorrosion measures are discussed, which can provide reference for further in-depth research on concrete microbial corrosion mechanism and anticorrosion technology, and the establishment of relevant norms and standards.

朱正宇,曾有旭,刘虎山,等.污水环境中混凝土的微生物腐蚀与防腐措施[J].混凝土与水泥制品,2022(8):6-11. CHU H Q,ZHANG C,GUO W H,et al.Microbial Corrosion and Anticorrosion Measures of Concrete in Sewage Environment[J].China Concrete and Cement Products,2022(8):6-11.

基于微纳米级水泥基多孔材料的相变骨料砂浆性能研究

蒋俊1，金超2，雷洛1，刘诗雨1，徐田圆1，刘铁2，管小军2，吴艳萍2，李军1，卢忠远1

2022年第8期

摘要

引用本文

摘要：以微纳米级水泥基多孔材料为载体，石蜡为相变材料，采用真空浸渍工艺，制备了相变骨料和相变骨料水泥砂浆，并研究了相变水泥砂浆的性能。研究结果表明：石蜡的最大负载率为65%；相变骨料泄漏率随真空度增加与浸渍时间延长而降低；随着相变骨料取代率的增加，砂浆的抗压强度降低，导热系数下降，且强化了延迟、降低温峰效应。 Abstract: Using micro-size/nano-size scale cement-based porous materials as carrier and paraffin as phase change material, phase change aggregate and phase change cement mortar were prepared by vacuum impregnation process, and then the performance of phase change cement mortar was studied. The results indicate that the maximum carrying rate of paraffin is 65%. The leakage rate of phase change aggregate decreases with the increase of vacuum degree and the prolongation of immersion time. The substitution rate of phase change aggregate increases, the compressive strength of the mortar is reduced, the thermal conductivity is reduced, and the delay and temperature peak reduction effects are strengthened.

蒋俊,金超,雷洛,等.基于微纳米级水泥基多孔材料的相变骨料砂浆性能研究[J].混凝土与水泥制品,2022(8):12-15,21. JIANG Jun, JIN Chao, LEI Luo,et al.Research on the Properties of Phase Change Aggregate Mortar Based on Micro-size/Nano-size Scale Cement-based Porous Materials[J].China Concrete and Cement Products,2022(8):12-15,21.

搅拌工艺对超高性能混凝土工作性和力学性能的影响

王启睿1，贺永胜1，谢晓庚2，田月强3，刘恩来1

2022年第8期

摘要

引用本文

摘要：设计了3种超高性能混凝土（UHPC）搅拌工艺，每种工艺各进行10组平行试验，测试了UHPC的坍落度、坍落扩展度、抗压强度和抗折强度，探讨了不同工艺对UHPC性能的影响，分析并评价了不同工艺下UHPC性能指标的离散性。结果表明，采用细骨料预先分散钢纤维的方法（工艺Ⅱ）有助于提升UHPC的抗折强度，所制备的UHPC坍落扩展度标准偏差最小；采用干混料制备的UHPC（工艺Ⅲ）抗压强度和抗折强度的标准偏差最小；宜采用工艺Ⅱ和工艺Ⅲ制备UHPC。 Abstract: Three mixing technology were designed to simplify the mixing procedure of ultra-high performance concrete (UHPC) with stable performance. For each mixing technology, ten parallel tests were carried out for testing the slump and flow of UHPC, as well as the compressive and flexural strength of UHPC. The effects of mixing technology on the workability and mechanical properties of UHPC were discussed, and then the dispersion degree of test data was analyzed. The results indicate that the method considering steel fiber pre-dispersed by fine aggregates (method Ⅱ) proves beneficial to enhance flexural strength of UHPC and results in the lowest standard deviation of slump flow of fresh UHPC. Moreover, UHPC prepared using dry blend mixed with designed dosage of water (method Ⅲ) shows a lowest standard deviation of compressive and flexural strength, compared with other mixing technology. In conclusion, method Ⅱ and method Ⅲ are suitable for preparation of UHPC.

王启睿,贺永胜,谢晓庚,等.搅拌工艺对超高性能混凝土工作性和力学性能的影响[J].混凝土与水泥制品,2022(8):16-21. WANG Q R,HE Y S,XIE X G.Influence of Mixing Technology on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2022(8):16-21.

三元矿物掺合料超高强灌浆料的制备及性能研究

陆春根1，相文芮2,3，詹弦庚2,3，李林华1

2022年第8期

摘要

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陆春根,相文芮,詹弦庚,等.三元矿物掺合料超高强灌浆料的制备及性能研究[J].混凝土与水泥制品,2022(8):22-25,36. LU C G,XIANG W R,CHAN H K,et al.Preparation and Properties of Ternary Mineral Admixture Ultra-high Strength Grouting Material[J].China Concrete and Cement Products,2022(8):22-25,36.

约束态混凝土单面盐冻损伤数值模拟及试验研究

徐亚丁1,2，高志浩1，王玲1，赵霞1，王振地1

2022年第8期

摘要

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摘要：为研究约束态与自由态混凝土单面盐冻劣化行为及机理，利用Abaqus/Explicit对混凝土表面和内部损伤过程进行了数值模拟研究，设计了混凝土约束装置，并对比研究了约束态和自由态混凝土单面盐冻循环的表面剥落量和相对动弹性模量损失。结果表明：与自由态混凝土相比，约束态混凝土表面损伤更严重，但内部损伤较轻；掺引气剂可以明显减少约束态混凝土的表面损伤；气孔的存在干扰了表面微裂纹的发展，含气量高的混凝土表面盐冻损伤程度较低；混凝土与表面冰层间变形量的差异是导致约束态混凝土表面损伤更严重的原因；约束抑制了混凝土内部微裂纹的发展，导致约束态混凝土比自由态混凝土内部损伤更轻。 Abstract: In order to study the degradation behavior and mechanism of restrained concrete and free-state concrete under single-side salt freezing and thawing, the surface and internal damage processes of concrete were numerically simulated by using Abaqus/Explicit. The concrete restraint device was designed. The surface spalling amount and relative dynamic elastic modulus loss of restrained concrete and free-state concrete under one-side salt freezing cycle were studied and compared. The results show that compared with the free-state concrete, the surface damage of restrained concrete is more serious, but the internal damage is less. Addition of air entraining agent can reduce the surface damage of restrained concrete obviously. The existence of pores interferes with the development of surface cracks, and the degree of salt freezing damage on the surface of concrete with high air content is lower. The great difference between the deformation of concrete and the surface ice is the reason for the greater surface damage of restrained concrete. Confinement inhibits the development of micro-cracks in the concrete, resulting in less damage in the restrained concrete.

徐亚丁,高志浩,王玲,等.约束态混凝土单面盐冻损伤数值模拟及试验研究[J].混凝土与水泥制品,2022(8):26-30. XU Y D,GAO Z H,WANG L,et al.Research on Numerical Simulation and Damage of Restrained Concrete Under Single-side Salt Freezing and Thawing[J].China Concrete and Cement Products,2022(8):26-30.

聚合物水泥砂浆的研究进展与发展趋势

尹征龙，张起，徐志辉，贺平祥

2022年第8期

摘要

引用本文

尹征龙,张起,徐志辉,聚合物水泥砂浆的研究进展与发展趋势[J].混凝土与水泥制品,2022(8):31-36. YIN Zheng-long, ZHANG Qi, XU Zhi-hui,et al.Research Progress and Trends of Polymer Cement Mortar[J].China Concrete and Cement Products,2022(8):31-36.

超高性能混凝土在建筑领域的应用研究

杨成军1，李锡松1，尹武晓1，戴厚亮1，余杨赟2

2022年第8期

摘要

引用本文

摘要：介绍了超高性能混凝土（UHPC）的定义和设计原理，叙述了UHPC的制备、性能以及在建筑工程中的应用情况，提出了其应用的存在问题，并对UHPC的发展方向进行了展望。 Abstract: The definition and design principles of ultra-high performance concrete (UHPC) are introduced. The preparation, performance, application of UHPC in construction engineering are reviewed, and the problems of its application are also pointed out. The development direction of UHPC is prospected.

杨成军,李锡松,尹武晓,等.超高性能混凝土在建筑领域的应用研究[J].混凝土与水泥制品,2022(8):37-40,49. YANG C J,LI X S,YIN W X,et al.Application in Construction Field of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2022(8):37-40,49.

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