轻骨料钢筋混凝土板正截面强度、裂缝、刚度研究
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摘要
轻骨料混凝土是一种用量较大的新型混凝土，其密度在850kg／m~3至1950kg／m~3之间，由粘土陶粒，粉煤灰陶粒等粗骨料以及常用的砂，水泥，水等材料制作而成。它不但具有质轻的优点，还能提供普通混凝土的强度、抗裂度等力学性能。目前已广泛应用于桥梁以及各种工业民用建筑上。
目前，在广西有关轻骨料混凝土的研究正在起步。本论文是对以粘土陶粒作粗骨料的轻质混凝土板的受力性能进行试验研究。论文从四个方面进行研究：轻骨料混凝土板的正截面承载力，抗裂度，正常使用极限状态下的裂缝宽度和挠度计算。
试验研究结果说明，以南宁市福民节能保温陶粒制品厂生产的陶粒作粗骨料的轻质混凝土板，其受力性能与普通钢筋混凝土板没有什么差别，可以用于工程实际。本文还提出了陶粒混凝土施工中应注意的问题供施工参考。
Lightweight aggregate concrete, weighting from 850kg/m3 to 1950kg/m3, is one of the extensively used concretes in the world. It is made of sand, cement and lightweight aggregate, etc. Some of the lightweight aggregates include pumice, stuff, expanded clays(haydite), etc. Lightweight aggregate concrete can provide the same strength as the normal concrete with less weight. At the same time, it has some special virtues that are different from normal concrete, such as high heat preservation, inherent fire resistance, etc.
The search of lightweight aggregate concrete began at 70's in our country. But there is still little experimental information about lightweight aggregate concrete in GuangXi Zhuang autonomous Region, so GuangXi Architectural Comprehensive Design & Research Institute combine with GuangXi University to experiment with this material. This paper bases on the experiment and researches the lightweight aggregate concrete from four aspects. Those include the load carrying capacity of the specimens in the limit state, the cracking load of the specimens, the crack width of the specimens and the deflection of the specimens.
The experimental results show that there are few differences in the mechanical properties between normal concrete slabs and lightweight aggregate concrete slabs which are made by haydite as coarse aggregate. At the same time, the haydite concrete proved that it is available in practice. The article also proposes some means in the making of the haydite concrete.
目前，在广西有关轻骨料混凝土的研究正在起步。本论文是对以粘土陶粒作粗骨料的轻质混凝土板的受力性能进行试验研究。论文从四个方面进行研究：轻骨料混凝土板的正截面承载力，抗裂度，正常使用极限状态下的裂缝宽度和挠度计算。
试验研究结果说明，以南宁市福民节能保温陶粒制品厂生产的陶粒作粗骨料的轻质混凝土板，其受力性能与普通钢筋混凝土板没有什么差别，可以用于工程实际。本文还提出了陶粒混凝土施工中应注意的问题供施工参考。
Lightweight aggregate concrete, weighting from 850kg/m3 to 1950kg/m3, is one of the extensively used concretes in the world. It is made of sand, cement and lightweight aggregate, etc. Some of the lightweight aggregates include pumice, stuff, expanded clays(haydite), etc. Lightweight aggregate concrete can provide the same strength as the normal concrete with less weight. At the same time, it has some special virtues that are different from normal concrete, such as high heat preservation, inherent fire resistance, etc.
The search of lightweight aggregate concrete began at 70's in our country. But there is still little experimental information about lightweight aggregate concrete in GuangXi Zhuang autonomous Region, so GuangXi Architectural Comprehensive Design & Research Institute combine with GuangXi University to experiment with this material. This paper bases on the experiment and researches the lightweight aggregate concrete from four aspects. Those include the load carrying capacity of the specimens in the limit state, the cracking load of the specimens, the crack width of the specimens and the deflection of the specimens.
The experimental results show that there are few differences in the mechanical properties between normal concrete slabs and lightweight aggregate concrete slabs which are made by haydite as coarse aggregate. At the same time, the haydite concrete proved that it is available in practice. The article also proposes some means in the making of the haydite concrete.
引文
[1] 赵国藩，李树瑶等，钢筋混凝土结构的裂缝控制，海洋出版社，1991
[2] 车宏亚，混凝土结构原理，天津大学出版社，1999
[3] 龚洛书，柳春圃，轻集料混凝土，中国铁道出版社，1996
[4] 法，P. 果尔蒙，苏锡楠等译，今日轻混凝土，中国建筑工业出版社，1984
[5] 陈增林等，结构用轻骨料混凝土，湖南科学技术出版社，1982
[6] 混凝土研究所，国外轻骨料混凝土应用，中国建筑科学研究院，1982
[7] 中国建筑科学研究院，轻骨料混凝土结构设计规程JGJ 12-99
[8] 中国建筑科学研究院，混凝土结构设计规程GBJ 10-89
[9] 姚振纲，刘祖华，建筑结构试验，同济大学出版社，1996
[10] 王祖华，陈眼云，混凝土与砌体结构，华南理工大学出版社，1992
[11] 过镇海，混凝土的强度和变形，清华大学出版社，1996
[12] 赵国藩，钢筋混凝土构件抗裂度和最大裂缝宽度的试验和计算方法，建筑结构学报，1980
[13] 石晓阳，配筋陶粒混凝土受拉构件裂缝宽度的研究，浙江大学研究生论文，1989．11
[14] 龙辉元，低配筋轻骨料混凝土梁裂缝宽度计算方法的研究，天津大学研究生论文，1991．2
[15] 栗海合，中高强陶粒混凝土在单调、反复和交变荷载作用下应力—应变全曲线的研究，天津大学研究生论文，1988．1
[16] 顾万黎，轻骨料混凝土结构的应用与试验研究，第三届全国轻骨料混凝土学术讨论会会议论文，1988．03
[17] 刘巽伯，葛雷，轻骨料弹性模量的研究，1988年中国硅酸盐学会房屋建筑材料专业委员会第四届年会会议论文，1988． 5
[18] Arthur H. Nilson, David Darwin, Design of Concrete Structures, McGraw Hill College Div, 12th edition, March 1991
[19] Li Zhujing, Seismological Press, Elementary reinforced concrete design
[20] Wang PT, et al. Stress-Strain Curves of Normal and Lightweight Concrete in Compression.Journal of ACI, 1978, 51(11) .
[21] Evans RH, Marathe MS. Microcracking and Stress-Strain Curves for Concrete in Tension. Materials and Structures, Research and Testing (RILEM, Paris), 1968, 1(1) : 61-64
[22] M. Myint Lwin, Chyuan-Shen, Phd Lee, J. J., Phd Lee, Structural Engineering, McGraw-Hill Professional Publishing, 2001
[23] John L. Clarke, Structural Lightweight Aggregate Concrete, E & F N Spon, 1993
[2] 车宏亚，混凝土结构原理，天津大学出版社，1999
[3] 龚洛书，柳春圃，轻集料混凝土，中国铁道出版社，1996
[4] 法，P. 果尔蒙，苏锡楠等译，今日轻混凝土，中国建筑工业出版社，1984
[5] 陈增林等，结构用轻骨料混凝土，湖南科学技术出版社，1982
[6] 混凝土研究所，国外轻骨料混凝土应用，中国建筑科学研究院，1982
[7] 中国建筑科学研究院，轻骨料混凝土结构设计规程JGJ 12-99
[8] 中国建筑科学研究院，混凝土结构设计规程GBJ 10-89
[9] 姚振纲，刘祖华，建筑结构试验，同济大学出版社，1996
[10] 王祖华，陈眼云，混凝土与砌体结构，华南理工大学出版社，1992
[11] 过镇海，混凝土的强度和变形，清华大学出版社，1996
[12] 赵国藩，钢筋混凝土构件抗裂度和最大裂缝宽度的试验和计算方法，建筑结构学报，1980
[13] 石晓阳，配筋陶粒混凝土受拉构件裂缝宽度的研究，浙江大学研究生论文，1989．11
[14] 龙辉元，低配筋轻骨料混凝土梁裂缝宽度计算方法的研究，天津大学研究生论文，1991．2
[15] 栗海合，中高强陶粒混凝土在单调、反复和交变荷载作用下应力—应变全曲线的研究，天津大学研究生论文，1988．1
[16] 顾万黎，轻骨料混凝土结构的应用与试验研究，第三届全国轻骨料混凝土学术讨论会会议论文，1988．03
[17] 刘巽伯，葛雷，轻骨料弹性模量的研究，1988年中国硅酸盐学会房屋建筑材料专业委员会第四届年会会议论文，1988． 5
[18] Arthur H. Nilson, David Darwin, Design of Concrete Structures, McGraw Hill College Div, 12th edition, March 1991
[19] Li Zhujing, Seismological Press, Elementary reinforced concrete design
[20] Wang PT, et al. Stress-Strain Curves of Normal and Lightweight Concrete in Compression.Journal of ACI, 1978, 51(11) .
[21] Evans RH, Marathe MS. Microcracking and Stress-Strain Curves for Concrete in Tension. Materials and Structures, Research and Testing (RILEM, Paris), 1968, 1(1) : 61-64
[22] M. Myint Lwin, Chyuan-Shen, Phd Lee, J. J., Phd Lee, Structural Engineering, McGraw-Hill Professional Publishing, 2001
[23] John L. Clarke, Structural Lightweight Aggregate Concrete, E & F N Spon, 1993
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