摘要
为配制轻骨料混凝土,选用中空玻璃微珠和页岩陶粒作为减重材料,并基于颗粒最紧密堆积理论确定了水泥—玻璃微珠—硅灰体系的组成和用量。依照绝对体积法计算各组分的配合比,设计了3组不同胶凝体系与骨料体系比例的混凝土,最后选用比强度最高的一组,运用真空搅拌技术进一步提高混凝土的力学性能,并对比研究了不同真空度下混凝土的3 d、28 d的抗压强度和表观密度。试验结果表明,成功配制出了表观密度小于1350 kg/m^(3)、抗压强度大于40 MPa的轻骨料混凝土,可为轻骨料混凝土的发展与应用提供理论依据。
In view of the preparation of lightweight aggregate concrete,a selection has been made of hollow glass beads and shale ceramsite as weight reducing materials,with the composition and dosage of cement glass beads silica fume system determined based on the particle densely-packing theory.The mix proportion is calculated according to the absolute volume method,followed by a design of three groups of concrete with different proportions of cementitious system and aggregate system.Finally,the group with the highest specific strength is selected,and the vacuum mixing technology is used for a further improvement of the mechanical properties of concrete.A comparison has been made of the 3 d and 28 d compressive strength and apparent density of concrete of different vacuum degrees.A successful a preparation has been achieved of the lightweight aggregate concrete with an apparent density less than 1350 kg/m^(3)and a compressive strength greater than 40 MPa,thus providing a theoretical basis for the development and application of lightweight aggregate concrete.
作者
丁波
欧志华
奉瑞萍
DING Bo;OU Zhihua;FENG Ruiping(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)
出处
《湖南工业大学学报》
2021年第6期1-7,共7页
Journal of Hunan University of Technology
基金
湖南省自然科学基金株洲联合基金资助项目(2021JJ50044)
湖南工业大学研究生科研创新基金资助项目(CX1924)。
关键词
颗粒紧密堆积理论
绝对体积法
真空搅拌
表观密度
抗压强度
particle densely-packing theory
absolute volume method
vacuum mixing
apparent density
compressive strength
作者简介
丁波(1996-),男,江苏盐城人,湖南工业大学硕士生,主要研究方向为建筑材料,E-mail:dingbo1109@163.com;通信作者:欧志华(1975-),男,湖南常宁人,湖南工业大学高级工程师,博士,主要从事高性能混凝土水泥基材料方面的教学与研究,E-mail:zihiou@163.com。
