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第八期

碱激发磷石膏复合胶凝材料力学性能研究
碱激发磷石膏复合胶凝材料力学性能研究
  • 麻鹏飞,杨 文,程宝军,亢泽千,康升荣
2021年第8期
摘要
引用本文
麻鹏飞,杨文,程宝军,亢泽千,康升荣.碱激发磷石膏复合胶凝材料力学性能研究[J].混凝土与水泥制品,2021(8):83-87. MA P F,YANG W,CHENG B J,et al.Study on Mechanical Properties of Alkali Activated Phosphogypsum Composite Cementitious Materials[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):83-87.
砖粉-石灰石粉混凝土的制备及性能研究
砖粉-石灰石粉混凝土的制备及性能研究
  • 明 阳1,2,3,4,李 玲1,2,3,4,李 青1,2,3,4,胡 成1,2,3,4,陈 平1,2,3,4,王 磊1,2,3,4
2021年第8期
摘要
引用本文
摘   要:通过正交试验研究了砖粉掺量、石灰石粉掺量、水胶比、砂率对混凝土工作性、力学性能和氯离子渗透性的影响,并确定了最优配合比。结果表明:采用25%的砖粉和10%的石灰石粉等质量替代35%的水泥,可以配制出性能优良的C35砖粉-石灰石粉混凝土,且与基准混凝土相比,其体积稳定性和氯离子渗透性得到明显改善。 Abstract: By using the orthogonal test, the influence of brick powder content, limestone powder content, water-binder ratio and sand ratio on the fluidity, mechanical properties and chloride ion permeability of the concrete with brick power and limestone powder were studied, and the optimum mix proportion was determined. The results show that C35 brick-limestone powder concrete with excellent performance can be prepared by using 25% brick powder and 10% limestone powder instead of 35% cement, and compared with the reference concrete, its volume stability and chloride ion permeability  are improved obviously.
明阳,李玲,李青,等.砖粉-石灰石粉混凝土的制备及性能研究[J].混凝土与水泥制品,2021(8):88-91. MING Y,LI L,LI Q,et al.Study on the Preparation and Performance of Concrete with Brick Powder and Limestone Powder[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):88-91.
浅谈绿色环保型预拌混凝土工厂的建设
浅谈绿色环保型预拌混凝土工厂的建设
  • 陈小和
2021年第8期
摘要
引用本文
摘   要:以公司的预拌混凝土工厂绿色转型升级项目为例,结合预拌混凝土绿色生产及管理的相关规范、规章要求,分别从项目的总体规划设计、主要工艺方案设计及设备选型、环境保护设施的设计建设及环保控制的具体措施等方面,介绍了预拌混凝土工厂向绿色、环保产业化转型升级的主要措施和实践。 Abstract: Taking the green transformation and upgrading projects of some ready mixed concrete plants of the company as an example, combined with the relevant specifications and regulations of green production and management of ready mixed concrete, the main measures and practices for the green transformation and upgrading of ready mixed concrete plants from the aspects of overall planning and design of the project, main process scheme design and equipment selection, design and construction of environmental protection facilities and specific measures of environmental protection control are introduced.
陈小和.浅谈绿色环保型预拌混凝土工厂的建设[J].混凝土与水泥制品,2021(8):92-95. CHEN X H.Discussion on the Construction of Green Environmental Ready Mixed Concrete Plants[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):92-95.
新型EPS模块浇筑墙体受压性能试验研究
新型EPS模块浇筑墙体受压性能试验研究
  • 宋珊珊,李倩茹,徐 晓,郝文秀,于万里
2021年第8期
摘要
引用本文
摘   要:通过对4片新型EPS模块浇筑墙体进行轴心和偏心受压试验,研究了试件的破坏形态、极限承载力和变形规律。在试验基础上,利用ABAQUS软件建立了新型EPS模块浇筑墙体有限元模型,并对试件的极限承载力进行了对比分析。结果表明:新型EPS模块内存在连接桥,墙体的破坏首先出现在连接桥处,最终破坏形式为受压区混凝土破坏;随着偏心距逐渐增大,墙体的极限承载力明显降低,应变与普通混凝土墙体的变化相似;有限元分析结果与试验结果吻合良好,可为工程设计提供分析方法和理论依据。 Abstract: Four new EPS module cast-in-place walls were tested under axial compression and eccentric compression,  and the failure mode, ultimate bearing capacity and deformation law of the specimens were studied. On the basis of the test, the finite element model of new EPS cast-in-place wall was established by using ABAQUS software, and the ultimate bearing capacity of the specimen was compared and analyzed. The results show that there is a connecting bridge in the new EPS module, and the wall failure first appears at the connecting bridge, and the final failure mode is concrete failure in the compression zone. With the increase of the eccentricity, the ultimate bearing capacity of the wall decreases obviously, and the change of the concrete strain is similar to that of the ordinary concrete wall. The results of finite element analysis are in good agreement with the test results, which can provide analysis method and theoretical basis for engineering design.
宋珊珊,李倩茹,徐晓,等.新型EPS模块浇筑墙体受压性能试验研究[J].混凝土与水泥制品,2021(8):64-68. SONG S S,LI Q R,XU X,et al.Experimental Study on Compression Performance of New EPS Module Walls[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):64-68.
全FRP筋增强混凝土梁抗剪性能综述
全FRP筋增强混凝土梁抗剪性能综述
  • 吕家美1,邸 博2,何立杰2,黄柳超2
2021年第8期
摘要
引用本文
摘   要:钢筋锈蚀导致混凝土结构性能下降,使用寿命缩短。纤维增强复合(FRP)筋具有高抗拉强度和优异的耐腐蚀性能,在部分结构中可代替钢筋,以提升混凝土结构的耐久性。将FRP筋应用于混凝土结构中是未来发展的重要方向,但目前关于其抗剪性能及抗剪机理尚未阐述清楚。本文对国内外关于FRP筋混凝土梁的抗剪性能研究进行了总结与分析。 Abstract: The corrosion of steel bar leads to the deterioration of the performance and the shortening of the service life of concrete structures. Fiber reinforced polymer(FRP) bars have high tensile strength and excellent corrosion resistance, and can replace steel bars in some structures to improve the durability of concrete structures. The application of FRP bars in concrete structures is an important development direction in the future. However, the shear behavior and shear mechanism of FRP reinforced concrete beams have not been explained clearly. Therefore, the research on shear behavior of FRP reinforced concrete beams at home and abroad is summarized and analyzed.
吕家美,邸博,何立杰,等.全FRP筋增强混凝土梁抗剪性能综述[J].混凝土与水泥制品,2021(8):69-73. LYU J M,DI B,HE L J,et al.Review on Shear Behavior of Concrete Beams Strengthened with FRP Bars and Stirrups[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):69-73.
基于LS-DYNA的钢筋混凝土梁落锤冲击响应分析
基于LS-DYNA的钢筋混凝土梁落锤冲击响应分析
  • 廖俊智,何 勇
2021年第8期
摘要
引用本文
摘   要:基于LS-DYNA显示动力分析程序,对3种不同配筋梁的冲击试验进行了数值模拟,通过参数分析探究了不同落锤高度下系统总能和各部件能量在整个冲击过程中的变化规律以及不同时间下剪应力沿梁长的分布情况。结果表明:随着落锤高度增加,落锤动能与梁体内能交换会出现滞后现象,落锤高度对梁体内各部件的耗能比例没有显著影响,冲击过程中惯性效应不明显;通过分析梁体内的剪应力分布情况,揭示了梁体在冲击过程中剪应力的传播规律和落锤高度对梁体抗剪性能的影响。 Abstract: The impact tests of three different reinforced beams were simulated based on the LS-DYNA explicit dynamic analysis program, and the change law of the total energy of the system and the energy of each component during the entire impact process under different drop weight heights and the distribution of shear stress along the beam length at different times were studied through parameter analysis. The results show that with the increase of the drop weight height, the kinetic energy of the falling weight and the energy in the beam body show a hysteresis phenomenon, and the drop weight height has no significant effect on the energy consumption ratio of various components in the beam body, and the inertial effect is not obvious during the impact process. The effects of the shear stress propagation law and the drop weight height on the shear resistance of the beam during the impact process are revealed by analyzing the distribution of shear stress.
廖俊智,何勇.基于LS-DYNA的钢筋混凝土梁落锤冲击响应分析全FRP筋增强混凝土梁抗剪性能综述[J].混凝土与水泥制品,2021(8):74-78. LIAO J Z,HE Y.Analysis of Impact Response of Reinforced Concrete Beams Based on LS-DYNA[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):74-78.
耳板式空腹桁架免支撑叠合板抗弯性能试验研究
耳板式空腹桁架免支撑叠合板抗弯性能试验研究
  • 张 旭1,陈 强1,庞祖杰2,孔 潇1,梁 艺2,王少杰1,胡兆文2
2021年第8期
摘要
引用本文
摘   要:通过标准砝码重物加载方法,研究了耳板式空腹桁架免支撑叠合板未浇筑后浇混凝土层、浇筑后浇混凝土层之后且上部钢管未拆除和拆除上部钢管三个施工受力阶段的抗弯性能,明晰了叠合板在各施工受力阶段的工作机制与设计计算方法。结果表明:耳板式空腹桁架免支撑叠合板在施工受力各阶段均具有良好的抵抗开裂与变形的能力,上部钢管、后浇混凝土层均可显著提高混凝土叠合底板的抗弯刚度。研究成果可为减少或免除普通混凝土叠合底板竖向支撑的使用,提高其抗裂性能提供有效路径。 Abstract: Through the loading method of standard weights, the flexural performance of the ear plate vierendeel truss composite slab without support in three construction stress stages of the post-cast concrete layer without pouring, the post-cast concrete layer after pouring and the upper steel tube without removing and the upper steel tube is removed were studied, and the working mechanism and design calculation method of the composite slab in each construction stress stage were clarified. The results show that the ear plate vierendeel truss composite slabs without support have good resistance to cracking and deformation at all construction stages, both the upper steel tube and post-cast concrete layer can significantly improve the flexural stiffness of concrete composite slabs. The research results can provide one of the effective ways for reducing or eliminating the use of vertical bracing of common concrete composite slab and improve its crack resistance.
张旭,陈强,庞祖杰,等.耳板式空腹桁架免支撑叠合板抗弯性能试验研究[J].混凝土与水泥制品,2021(8):79-82,95. ZHANG X,CHEN Q,PANG Z J,et al.Experimental Study on Flexural Performance of Ear Plate Vierendeel Truss Composite Slab Without Support[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):79-82,95.
PVA纤维分散性及纤维混凝土弯曲韧性试验研究
PVA纤维分散性及纤维混凝土弯曲韧性试验研究
  • 邓宗才1,赵连志2,丁建明1,贺少锋1
2021年第8期
摘要
引用本文
摘   要:提出了一种新型纤维混凝土拌和工序和评价纤维分散性的简易方法,并研究了不同掺量PVA纤维对混凝土力学性能和弯曲韧性的影响。结果表明:新型拌合工序可以有效降低对纤维的损伤,有助于纤维在混凝土中均匀分散;当纤维掺量为4.5 kg/m3和7.5 kg/m3时,纤维分散性较好,而当纤维掺量为10.5 kg/m3时,纤维分散性欠佳;随着PVA纤维掺量的增加,混凝土的抗压、抗拉强度先增后减,弯拉强度和韧性耗能能力逐渐增强。 Abstract: A new mixing process of the fiber-reinforced concrete and a simple method for evaluating fiber dispersion were put forward, and the effects of different contents of PVA fiber on the mechanical properties and flexural toughness of concrete were studied. The results show that the new mixing method can effectively reduce the damage to the fiber and help the fiber disperse evenly in the concrete. When the fiber content is 4.5 kg/m3 and 7.5 kg/m3, the fiber dispersion is better, but the fiber dispersion is unsatisfactory when the fiber content is 10.5 kg/m3. With the increase of PVA fiber content, the compressive strength and tensile strength increase first and then decrease, and the flexural tensile strength and the toughness energy dissipation capacity gradually increase.
邓宗才,赵连志,丁建明,等.PVA纤维分散性及纤维混凝土弯曲韧性试验研究[J].混凝土与水泥制品,2021(8):49-53. DENG Z C,ZHAO L Z,DING J M,et al.Experimental Study on PVA Fiber Dispersion and Bending Toughness of Fiber Reinforced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):49-53.
复掺纤维和玻化微珠对湿热环境下混凝土性能的影响
复掺纤维和玻化微珠对湿热环境下混凝土性能的影响
  • 吕家栋1,赵立财1,2
2021年第8期
摘要
引用本文
摘   要:研究了复掺钢纤维、聚丙烯纤维和玻化微珠对混凝土抗压性能的影响,通过微观定量方法描述了混凝土孔隙结构与抗压性能之间的关系,结合声发射技术分析了湿热环境下混凝土的压缩破坏特征。结果表明:复掺钢纤维、聚丙烯纤维和玻化微珠混凝土在各级温度下的抗压强度均最高,且随温度上升的强度损失率最低;复掺钢纤维、聚丙烯纤维和玻化微珠混凝土的孔隙率和孔隙分形维数与抗压强度有良好的非线性关系;复掺钢纤维、聚丙烯纤维和玻化微珠可使混凝土的破坏形式从以张拉破坏为主转变为以剪切破坏为主。 Abstract: The effects of steel fiber, polypropylene fiber and vitrified beads on the compressive performance of concrete were studied, and the relationship between pore structure and compressive performance of concrete was described by microscopic quantitative method, and the compression failure characteristics of concrete under hot-humid environment were studied. The results show that the compressive strength of the concrete mixed with steel fiber, polypropylene fiber and vitrified beads is the highest at all temperatures, and the strength loss rate with the increase of temperature is the lowest. The porosity and fractal dimension of the concrete mixed with steel fiber, polypropylene fiber and vitrified beads have good nonlinear relationship with compressive strength. The addition of steel fiber, polypropylene fiber and vitrified beads can change the concrete failure mode from tensile failure to shear failure.
吕家栋,赵立财.复掺纤维和玻化微珠对湿热环境下混凝土性能的影响[J].混凝土与水泥制品,2021(8):54-58. LYU J D,ZHAO L C.Effects of Composite Fiber and Vitrified Beads on the Performance of Concrete in Hot-humid Environment[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):54-58.
基于响应面法的玄武岩纤维再生混凝土力学性能分析
基于响应面法的玄武岩纤维再生混凝土力学性能分析
  • 陈兴祥,谭 燕,童 瑶,张维维
2021年第8期
摘要
引用本文
摘   要:基于Design Expert软件,采用响应面法(RSM)分析了玄武岩纤维(BF)长度和体积掺量对再生粗骨料替代率为20%的玄武岩纤维再生混凝土(BFRAC)力学性能的影响。结果表明:BF体积掺量对BFRAC力学性能的影响程度大于BF长度;对于抗折强度、劈裂抗拉强度和抗压强度,对应的BF最佳掺量分别为0.2%、0.1% 和0.2%。 Abstract: Based on Design Expert software, the response surface method(RSM) was used to analyze the influence of basalt fiber (BF) length and volume content on the mechanical properties of basalt fiber recycled concrete(BFRAC) with 20% replacement rate of recycled coarse aggregate. The results show that BF volume content has a greater influence on the mechanical properties of BFRAC than that of BF length. For the flexural strength, split tensile strength and compressive strength of BFRAC, the corresponding optimal BF content is 0.2%, 0.1% and 0.2%, respectively.
陈兴祥,谭燕,童瑶,等.基于响应面法的玄武岩纤维再生混凝土力学性能分析[J].混凝土与水泥制品,2021(8):59-63. CHEN X X,TAN Y,TONG Y,et al.Analysis of Mechanical Properties of Basalt Fiber Recycled Concrete Based on Response Surface Method[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):59-63.
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