混凝土研究_2023_《混凝土与水泥制品》杂志社

头部文案

发布时间：2020-01-06 00:00:00

全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊（光盘版）全文收录期刊

华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊



全部文章

混凝土研究

混凝土抗干缩剂的制备及性能研究

贾君1，吕生华2，任洋军1，刘雷鹏2，李泽雄2，吴磊2，李尧2

2023年第4期

摘要

引用本文

摘要：分别用三乙醇铝和三乙醇铁通过原位水解法制备了纳米Al2O3和纳米Fe2O3分散液，并用四臂聚乙二醇丙烯酰胺酯、丙烯酸、甲基丙烯酸乙二醇磷酸酯和乙烯基咪唑通过自由基聚合制备了两性聚合物分散剂（APD），再将纳米Al2O3、纳米Fe2O3分散液和氧化石墨烯（GO）分散液与APD复合制备了混凝土抗干缩剂（AFG），并对AFG的分子结构及性能进行了研究。结果表明：APD能够吸附纳米Al2O3、Fe2O3与GO在分子链上使其均匀分散在水相及水泥基体中；将AFG掺入混凝土中能够显著提高混凝土的强度、抗渗及抗干缩性能。 Abstract: Nano Al2O3 and nano Fe2O3 dispersions were prepared by in-situ hydrolysis of aluminum triethanol and iron triethanol, respectively. Amphoteric polymer dispersions(APD) were prepared by radical polymerization of four arm polyethylene glycol acrylamide, acrylic acid, ethylene glycol methacrylate phosphate and vinyl imidazole. The anti shrinkage admixture(AFG) for concrete was prepared by compounding nano Al2O3 and Fe2O3 dispersion, graphene oxide (GO) dispersion with APD. The molecular structure and properties of AFG were studied. The results show that APD can adsorb nano Al2O3, Fe2O3 and GO on the molecular chain to make them uniformly disperse in the aqueous phase and cement matrix. Adding AFG into concrete can significantly improve the strength, impermeability and shrinkage resistance of concrete.

贾君,吕生华,任洋军,等.混凝土抗干缩剂的制备及性能研究[J].混凝土与水泥制品,2023(4):1-5. JIA J,LYU S H,REN Y J,et al.Study on Preparation and Properties of Concrete Anti Shrinkage Admixture[J].China Concrete and Cement Products,2023(4):1-5.

碳纳米管在UHPC中的分散效果及对UHPC力学性能的影响

成芳1，李小明2，黄政宇3

2023年第4期

摘要

引用本文

摘要：为了研究碳纳米管（CNTs）在超高性能混凝土（UHPC）中的分散效果及其对UHPC力学性能的影响，进行了不同CNTs掺量UHPC的动力黏度、抗压强度和抗折强度试验。结果表明：CNTs在UHPC基体中的分散效果随着CNTs掺量的增加而不断变差，且会导致较高CNTs掺量的UHPC力学性能降低；当CNTs掺量为0.1%时，CNTs增强UHPC的力学性能最佳。 Abstract: In order to study the dispersion effect of carbon nanotubes(CNTs) in ultra-high performance concrete (UHPC) and its influence on the mechanical properties of UHPC, shear viscosity, compressive strength and flexural strength of UHPC with different CNTs content were tested. The results show that the dispersion effect of CNTs in UHPC matrix deteriorates with the increase of CNTs content, and the mechanical properties of UHPC decrease with the increase of CNTs content. When the CNTs content is 0.1%, the mechanical properties of UHPC are the best.

成芳,李小明,黄政宇.碳纳米管在UHPC中的分散效果及对UHPC力学性能的影响[J].混凝土与水泥制品,2023(4):6-8,29. CHENG F,LI X M,HUANG Z Y.Dispersion Effect of Carbon Nanotubes in UHPC and Its Influence on Mechanical Properties of UHPC[J].China Concrete and Cement Products,2023(4):6-8,29.

辅助振捣对自密实重晶石混凝土离析的影响

石建军，李竹静，张志恒，杨晓峰，颜维，许新春，禹博

2023年第4期

摘要

引用本文

摘要：为了研究辅助振捣对自密实重晶石混凝土离析的影响，以振捣棒电压（70 V、85 V、100 V）、振捣时间（6 s、8 s、10 s）及插入深度（100 mm、200 mm、300 mm）三个因素设计了正交试验。在内径和深度均为300 mm的检测筒内进行分层离析试验，试验采用两种辅助振捣方式（第一种插拔静止状态下的振捣棒、第二种插拔振动状态下的振捣棒），并对结果进行了评价与分析。结果表明：采用第一种振捣方式时，电压70 V、振捣时间6 s、插入深度200 mm为最优振捣参数，自密实重晶石混凝土的离析最小；不同粒径粗骨料的离析有明显区别，粗骨料粒径越大，离析越大；采用相同振捣参数，第二种振捣方式比第一种振捣方式下的自密实重晶石混凝土离析更大。 Abstract: In order to study the effect of auxiliary vibration on segregation of self-compacting barite concrete, the orthogonal experiment was designed from three factors of poker vibrator voltages (70 V, 85 V, 100 V), vibration time (6 s, 8 s, 10 s) and vibration depths (100 mm, 200 mm, 300 mm). The segregation test was carried out in three layers of mold with inner diameter and depth of 300 mm, and the results were analyzed and evaluated. Two methods of auxiliary vibration (the first method is keeping poker vibrator in static state when it is inserted and pulled and the second is in vibrating state) were adopted in the test. The results show that the optimal vibration parameters are voltage of 70 V, vibration time of 6 s and insertion depth of 200 mm when the first vibration method is adopted, and the segregation of self-compacting barite concrete is the smallest. The separation of coarse aggregates with different particle sizes has an apparent difference, and the larger the particle size of the aggregate, the greater the segregation. With the same vibration parameters, the segregation of self-compacting barite concrete in the second vibration method is greater than that in the first vibration method.

石建军,李竹静,张志恒,等.辅助振捣对自密实重晶石混凝土离析的影响[J].混凝土与水泥制品,2023(4):9-13. SHI J J,LI Z J,ZHANG Z H,et al.Effect of Auxiliary Vibration on Segregation of Self-Compacting Barite Concrete[J].China Concrete and Cement Products,2023(4):9-13.

自制悬浮稳定剂对水泥基自流平砂浆性能的影响

逄鲁峰1,2，黄凌苗1，杜诗寒3，孙立刚1，付鹏2

2023年第4期

摘要

引用本文

摘要：由无机纳米材料、有机高分子材料等多种外加剂制备了一种新型悬浮稳定剂，通过单因素试验研究了该悬浮稳定剂对水泥基自流平砂浆的工作性、强度、收缩性能、稳定性的影响，并得到了最佳掺量。此外，还对比了悬浮稳定剂和纤维素醚在自流平砂浆中的使用效果。结果表明：所制备的悬浮稳定剂可以取代纤维素醚，降低了自流平砂浆的用水量敏感度，提高了自流平砂浆的后期强度，硬化后收缩率稳定，减小了开裂风险，使用效果比纤维素醚更优。 Abstract: A new suspension stabilizer was prepared from inorganic nano materials, organic polymer materials and other additives. The influence of the suspension stabilizer on the workability, strength, shrinkage and stability of cement-based self leveling mortar was studied through single factor test, and the best dosage was obtained. In addition, the effects of suspension stabilizer and cellulose ether in self leveling mortar were compared. The results show that the prepared suspension stabilizer can replace cellulose ether, reduce the water volume sensitivity of self leveling mortar, improve the late strength, stabilize the shrinkage rate after hardening, reduce the risk of cracking, and the use effect is better than cellulose ether.

逄鲁峰,黄凌苗,杜诗寒,等.自制悬浮稳定剂对水泥基自流平砂浆性能的影响[J].混凝土与水泥制品,2023(4):14-17. PANG L F,HUANG L M,DU S H,et al.Effect of Self-made Suspension Stabilizer on Properties of Cement-Based Self Leveling Mortar[J].China Concrete and Cement Products,2023(4):14-17.

石灰石粉对清水混凝土性能和外观质量的影响

陈光伟1，安景峰1，郭赵元1，周童2，杨鹏2，姜骞3

2023年第4期

摘要

引用本文

摘要：研究了石灰石粉的细度（18、38、75 μm）和掺量（10%、20%、30%）对清水混凝土性能和外观质量的影响。结果表明：随着石灰石粉掺量的增加，清水混凝土的抗压强度基本呈降低趋势，提高石灰石粉的细度可以减轻石灰石粉对抗压强度的不利影响；与细度为18 μm、75 μm的石灰石粉相比，细度为38 μm的石灰石粉可以改善新拌清水混凝土的初始气泡结构，推动新拌清水混凝土中的微细气泡向大气泡转变；石灰石粉不利于硬化清水混凝土表面气孔结构的优化，但适量（10%）石灰石粉能够有效降低硬化清水混凝土表面的气孔含量；石灰石粉可以改善清水混凝土的表面色差，改善程度与石灰石粉的细度和掺量呈正相关；石灰石粉有助于降低清水混凝土的表面粗糙度，但当石灰石粉的细度超过38 μm或者掺量大于20%时，表面粗糙度几乎不再降低；工程应用结果表明，选用细度为38 μm或18 μm的石灰石粉并控制其掺量为10%，可以制备出性能和外观质量满足要求的清水混凝土构件。 Abstract: The influence of the fineness(18, 38, 75 μm) and content(10%, 20%, 30%) of limestone powder on the performance and appearance quality of fair-faced concrete was studied. The results show that with the increase of limestone powder content, the compressive strength of fair-faced concrete decreases, but increasing the fineness of limestone powder can reduce the adverse impact of limestone powder on compressive strength. Compared with limestone powder with fineness of 18 μm and 75 μm, the limestone powder with fineness of 38 μm can improve the initial air bubble structure of fresh fair-faced concrete and promote the transformation of micro air bubbles into large air bubbles in fresh fair-faced concrete. Limestone powder is not conducive to the optimization of pore structure on hardened fair-faced concrete surface, but an appropriate content (10%) of limestone powder can effectively reduce the pore content on hardened fair-faced concrete surface. Limestone powder can improve the surface color difference of fair-faced concrete, and the improvement degree is positively related to the fineness and content of limestone powder. Limestone powder can help to reduce the surface roughness of fair-faced concrete, but when the fineness of limestone powder is more than 38 μm or the content is more than 20%, the surface roughness will hardly decrease. The engineering application results show that fair-faced concrete components with performance and appearance quality meeting the requirements can be prepared by selecting limestone powder with fineness of 38 μm or 18 μm and controlling its content to 10%.

陈光伟,安景峰,郭赵元,等.石灰石粉对清水混凝土性能和外观质量的影响[J].混凝土与水泥制品,2023(4):18-23. CHEN G W,AN J F,GUO Z Y,et al.Influence of Limestone Powder on Performance and Appearance Quality of Fair-Faced Concrete[J].China Concrete and Cement Products,2023(4):18-23.

地铁杂散电流对钢筋混凝土的腐蚀研究综述及机制砂应用展望

金凡1，张苑竹

2023年第4期

摘要

引用本文

摘要：介绍了近年来国内外关于杂散电流腐蚀混凝土和机制砂混凝土的研究现状，分析了杂散电流引发钢筋腐蚀的机理，介绍了杂散电流对混凝土耐久性能造成的影响，总结了在母岩种类、石粉含量等因素控制下机制砂混凝土性能的差异，指出了当严格把控机制砂的母岩和石粉含量时，机制砂混凝土具备良好的抗氯离子侵蚀性能，能够作为天然砂混凝土的替代品，并对机制砂混凝土抗杂散电流腐蚀在地铁管片工程中的应用进行了展望。 Abstract: The research status of stray current corrosion concrete and manufactured sand concrete at home and abroad in recent years is introduced. The mechanism of steel bar corrosion caused by stray current is analyzed. The effect of stray current on durability of concrete is introduced, and the difference of performance of manufactured sand concrete under the control of factors such as parent rock type, stone powder content is summarized. It is pointed out that when the content of parent rock and stone powder of manufactured sand is strictly controlled, manufactured sand concrete has good chloride ion corrosion resistance and can be used as a substitute for natural sand concrete. The application of manufactured sand concrete against stray current corrosion in subway segment engineering is prospected.

金凡,张苑竹.地铁杂散电流对钢筋混凝土的腐蚀研究综述及机制砂应用展望[J].混凝土与水泥制品,2023(4):24-29. JIN F,ZHANG Y Z.Summary of Research on Corrosion of Reinforced Concrete Caused by Stray Current in Subway and Application Prospect of Manufactured Sand[J].China Concrete and Cement Products,2023(4):24-29.

四元掺合料复合碳纤维网的TRC耐久性能研究

栾心国

2023年第4期

摘要

引用本文

摘要：对比研究了二元和四元矿物掺合料混凝土的自收缩、电通量、抗硫酸盐侵蚀性能，并利用四元复掺配合比与碳纤维网复合制备了纤维编织网增强混凝土（Textile Reinforced Concrete，以下简称TRC），进行了TRC平板试件的耐久性能研究。结果表明：对比二元复掺混凝土，粉煤灰-矿粉-偏高岭土-石灰石粉四元复合掺合料可以有效减少混凝土试件的早期自收缩，有效提高混凝土的抗氯离子渗透性和抗硫酸根离子侵蚀性，优化混凝土的孔结构，密实界面过渡区；四元复合掺合料与碳纤维编织网复合制备的TRC板具有良好的耐久性能。 Abstract: The self-shrinkage, electrical flux and sulfate resistance of binary and quaternary mineral admixture concrete were compared and studied. The textile reinforced concrete(TRC) was prepared by using the quaternary composite admixture and carbon fiber mesh, and the durability of TRC plate specimens was studied. The results show that compared with binary composite concrete, the four-component composite admixture of fly ash, mineral powder, metakaolin and limestone powder can effectively reduce the early autogenous shrinkage of concrete specimens, effectively improve the resistance to chloride ion penetration and sulfuric acid attack of concrete, optimize the pore structure of concrete, and compact the transition zone of the interface. The TRC plate compounded with carbon fiber woven mesh and quaternary composite mineral admixture has good durability.

栾心国.四元掺合料复合碳纤维网的TRC耐久性能研究[J].混凝土与水泥制品,2023(4):30-33,38. LUAN X G.Study on the Durability of the Composite Carbon Fiber Mesh TRC with Quaternary Admixtures[J].China Concrete and Cement Products,2023(4):30-33,38.

压力成型对砂浆孔结构、强度及分形维数的影响

于成鑫，闫浩康，王硕，岳雪涛

2023年第4期

摘要

引用本文

摘要：采用压汞法测试了不同初始加压时间水泥砂浆的孔结构参数，并计算孔分形维数，研究了初始加压时间与抗压强度、孔结构、孔分形维数之间的关系。结果表明：初始加压时间对砂浆孔隙率和抗压强度的影响显著，加压时间过早或过晚均不利于砂浆抗压强度的发展，初始加压时间宜为养护2.5 h左右；压力成型下砂浆的孔结构具有明显的分形特征，孔分形维数范围为3.0~3.2，孔分形维数与孔隙率存在良好的相关性，能够在一定程度上反映水泥基材料宏观性能的优劣。 Abstract: The pore structure parameters of cement mortar with different initial compression time were measured by mercury intrusion porosimetre, and the pore fractal dimension was calculated. The relationship between initial compression time and compressive strength, pore structure and pore fractal dimension was studied. The results show that the initial compression time has a significant impact on the porosity and compressive strength of the mortar. The early or late compression time is not conducive to the development of the mortar compressive strength. The initial compression time should be after 2.5 h curing. The pore structure of mortar under pressure molding has obvious fractal characteristics, with fractal dimension ranging from 3.0 to 3.2. There is a good correlation between pore fractal dimension and porosity, which can reflect the advantages and disadvantages of the macro performance of cement-based material to a certain extent.

于成鑫,闫浩康,王硕,压力成型对砂浆孔结构、强度及分形维数的影响[J].混凝土与水泥制品,2023(4):34-38. YU C X,YAN H K,WANG S,et al.Influence of Pressure Forming on Pore structure, Strength and Fractal Dimension of Mortar[J].China Concrete and Cement Products,2023(4):34-38.

总访问量 468,401 网站统计

官方微信公众号关闭

关于我们 | 联系我们 | 订购杂志 | 回到顶部

苏ICP备10086386号

网站建设：中企动力苏州