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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

建筑废弃物轻质隔墙板的制备及力学性能研究
建筑废弃物轻质隔墙板的制备及力学性能研究
  • 谭春雷1,任 吉2,崔李三1,邓 宇1
2023年第3期
摘要
引用本文
摘   要:以硅烷偶联剂、木质素纤维、双氧水作为改性剂,对建筑废弃物粉末进行改性,并将改性后形成的水性复配物作为胶凝材料替代部分水泥,与建筑废弃物颗粒充分混合,制成轻质隔墙板,研究了木质素纤维掺量和建筑废弃物颗粒掺量对轻质隔墙板力学性能的影响,并进行了SEM微观分析。结果表明:改性后的建筑废弃物水性复配物具有与水泥相同功效的凝胶性质,在交联聚合作用下,可形成稳定的三维网络结构,有效提高轻质隔墙板的力学强度;随着木质素纤维掺量和建筑废弃物颗粒掺量的增加,轻质隔墙板的力学性能均呈先增大后减小的趋势,最佳木质素纤维掺量为6%,适宜建筑废弃物颗粒掺量为42%左右。 Abstract: With silane coupling agent, lignin fiber and hydrogen peroxide as modifiers, the construction waste powder was modified, and the modified water-based compound was used as the cementitious material to replace part of cement, which was fully mixed with the construction waste particles to prepare lightweight partition board. The influence of lignin fiber content and construction waste particle content on the mechanical properties of lightweight partition board was studied, and the SEM microscopic analysis was carried out. The results show that the modified water-borne compound of construction waste has the same gel property as cement, and can form a stable three-dimensional network structure under the cross-linking polymerization, effectively improving the mechanical strength of lightweight partition board. With the increase of lignin fiber content and construction waste particle content, the mechanical properties of lightweight partition board are increased first and then decreased, and the optimum content of lignin fiber is 6%, and the suitable content of construction waste particle is about 42%.
谭春雷,任吉,崔李三,等.建筑废弃物轻质隔墙板的制备及力学性能研究[J].混凝土与水泥制品,2023(3):74-77. TAN C L,REN J,CUI L S,et al.Study on Preparation and Mechanical Properties of Lightweight Partition Board with Construction Waste[J].China Concrete and Cement Products,2023(3):74-77.
轻质陶粒混凝土的配合比优化及性能研究
轻质陶粒混凝土的配合比优化及性能研究
  • 黄炜蓥1,黄群艺1,2,梁 罗1
2023年第3期
摘要
引用本文
摘   要:为了解决装配式结构在村镇建筑应用中存在预制构件自重较大、运输和安装要求较高等问题,用轻质陶粒混凝土替代普通混凝土生产预制构件,以减轻预制构件的重量。开展轻质陶粒混凝土的配合比优化及性能试验研究。结果表明:轻质陶粒混凝土中的水泥、砂、陶粒、水用量分别为400、540、450、170 kg/m3时,试件的干表观密度为1 816.7 kg/m3,满足轻质混凝土相关要求;28 d抗压强度为35.5 MPa,满足承重构件强度要求;坍落度为78 mm,和易性满足30~80 mm要求。 Abstract: In order to solve the problems of prefabricated components in village and town building applications, such as the large self-weight of prefabricated components and the high requirements for transportation and installation, lightweight ceramsite concrete was used to replace ordinary concrete to produce prefabricated components to reduce the weight of prefabricated components. The mix proportion optimization and performance test of lightweight ceramsite concrete were carried out. The results show that when the amount of cement, sand, ceramsite and water in lightweight ceramsite concrete is 400, 540, 450 and 170 kg/m3 respectively, the dry apparent density of the specimen is 1 816.7 kg/m3, which meets the relevant requirements of lightweight concrete. The 28 d compressive strength is 35.5 MPa, meeting the strength requirements of load-bearing components. The slump is 78 mm, and the workability meets the requirements of 30~80 mm.
黄炜蓥,黄群艺,梁罗.轻质陶粒混凝土的配合比优化及性能研究[J].混凝土与水泥制品,2023(3):70-73. HUANG W Y,HUANG Q Y,LIANG L.Study on Mix Proportion Optimization and Performance of Lightweight Ceramsite Concrete[J].China Concrete and Cement Products,2023(3):70-73.
配工字型钢混凝土梁的剪扭性能数值模拟分析
配工字型钢混凝土梁的剪扭性能数值模拟分析
  • 谢 强,邵永健,严舒云
2023年第3期
摘要
引用本文
摘   要:试验研究了4个配工字型钢混凝土梁试件和1个钢筋混凝土梁试件的剪扭性能,并用ABAQUS软件进行了数值模拟,分析了截面配钢率、混凝土强度、截面尺寸、箍筋间距对梁剪扭性能的影响。结果表明:模拟得到的扭矩-扭率曲线与试验值吻合较好;梁的极限扭矩随着截面配钢率的增大而增大,但当截面配钢率大于3.48%后,对极限扭矩的提高有限;随着混凝土强度的增加,梁的屈服扭矩和极限扭矩均增大,开裂扭率增大;梁的初始刚度、屈服扭矩、极限扭矩和延性均随着截面尺寸的增大而显著提升;提高截面配钢率和降低箍筋间距均可提升梁的延性。 Abstract: The shear torsional performance of four I-shaped steel reinforced concrete beams and one reinforced concrete beam was studied experimentally, and the numerical simulation was carried out with ABAQUS software, and the effects of section steel ratio, concrete strength, section size and stirrup spacing on the shear torsional performance of beams were analyzed. The results show that the simulated torque-torsion curves of the specimens are in good agreement with the experimental values. The ultimate torque of the beam increases with the increase of the section steel ratio, but when the section steel ratio is greater than 3.48%, the increase of the ultimate torque is limited. With the increase of concrete strength, the yield torque and ultimate torque of the beam increase, and the cracking torsion rate increases. The initial stiffness, yield torque, ultimate torque and ductility of the beam increase significantly with the increase of the section size. The ductility of the beam can be improved by increasing the section steel ratio and reducing the stirrup spacing.
谢强,邵永健,严舒云.配工字型钢混凝土梁的剪扭性能数值模拟分析[J].混凝土与水泥制品,2023(3):64-69. XIE Q,SHAO Y J,YAN S Y.Numerical Simulation Analysis of Shear Torsional Performance of I- shaped Steel Reinforced Concrete Beams[J].China Concrete and Cement Products,2023(3):64-69.
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