基于结构自保温的高性能页岩陶粒混凝土试验研究
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摘要
为了配制出高性能页岩陶粒混凝土,以强度和导热系数为设计目标,通过正交试验,得到了强度等级不低于LC40的页岩陶粒混凝土最佳配合比,并分别研究了河砂、不同纤维对陶粒混凝土性能的影响。结果表明,河砂对混凝土强度影响不大,而钢纤维掺量为2%时,其抗压、抗折、劈拉强度均有明显提高,并优于其他纤维品种;陶粒混凝土的轴心与立方体抗压强度接近,且弹性模量较低,峰值应变与总应变较大。最后,对假定的几种结构混凝土和围护结构的保温措施,采用热工模拟计算,得到了节能率不低于65%的一体化建筑保温系统。
In order to make up high performance ceramsite concrete( HPCC) and be applied in engineering practice,the best mixture ratio of high-strength shale ceramsite concrete( HSSCC) no less than LC40 is obtained by orthogonal tests based on the indexes of strength and thermal conductivity,then the effects of sand and different fibers on physical-mechanical properties of CC are studied. The test results show that the sand has little effect on strength,but steel fibers have a great deal when added 2%,the compressive strength,splitting strength and flexural strength are all higher than ordinary one. Besides,the axial strength is similar to cube compressive strength,and the elastic modulus is lower,the peak strains and the total strains are larger. In the end,the integration system of insulation building is founded and the economy energy rate is not less than 65% by aseismic check based on the upper test results,including of the physical-mechanical properties,and the supposed several types of structure concretes and outer protective structures.
In order to make up high performance ceramsite concrete( HPCC) and be applied in engineering practice,the best mixture ratio of high-strength shale ceramsite concrete( HSSCC) no less than LC40 is obtained by orthogonal tests based on the indexes of strength and thermal conductivity,then the effects of sand and different fibers on physical-mechanical properties of CC are studied. The test results show that the sand has little effect on strength,but steel fibers have a great deal when added 2%,the compressive strength,splitting strength and flexural strength are all higher than ordinary one. Besides,the axial strength is similar to cube compressive strength,and the elastic modulus is lower,the peak strains and the total strains are larger. In the end,the integration system of insulation building is founded and the economy energy rate is not less than 65% by aseismic check based on the upper test results,including of the physical-mechanical properties,and the supposed several types of structure concretes and outer protective structures.
引文
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[2]高振华,郭玉顺,木村薰,等.高性能轻骨料的生产、性能及成因剖析[J].混凝土,2001(2):3-6.
[3]王玉,杨健辉,吕凌艳,等.基于陶粒骨料的混凝土试验研究[J].工业建筑,2011,41(S1):635-637.
[4]孙海林,丁建彤,叶列平.高强轻骨料混凝土在桥梁工程中的应用[C]//中国土木工程学会桥梁及结构工程分会第十五次年会论文集.北京:人民交通出版社,2002:787-793.
[5]Melby K,Jordet E A,Hansvold C.Long-Span Bridges in Norway Constructed in High-Strength LWA Concrete[J].Engineering Structures,1996,18(11):845-849.
[6]Gao J M,Sun W,Morino K.Mechanical Properties of Steel Fiber Reinforced High-Strength Lightweight Concrete[J].Cement and Concrete Composites,1997,19(1):307-313.
[7]JGJ 51—2002轻骨料混凝土技术规程[S].
[8]Lionello,Bortolotti.Interdependence of Concrete Strength Parameters[J].ACI Materials Journal,1990,87(1):25-26.
[9]王海龙.轻骨料混凝土早期力学性能与抗冻性能的试验研究[D].包头:内蒙古农业大学,2009.
[10]宋小雷,孙燕秋,曾志兴.钢纤维陶粒混凝土基本力学性能的试验[J].工业建筑,2008,38(1):81-83.
[11]霍俊芳.钢纤维改善轻骨料混凝土力学性能研究[J].工业建筑,2007,37(12):96-99.
[12]王玉.基于结构保温的高性能陶粒混凝土试验研究[D].焦作:河南理工大学,2011.
[13]吴平安,刘宜平,杨洁,等.高强高性能混杂纤维轻骨料混凝土的试验研究[C]//中国力学学会第18届全国结构工程学术会议论文集.北京:2011:163-169.
[14]GB 50096—2011住宅设计规范[S].
[15]徐占发.建筑节能技术实用手册[M].北京:机械工业出版社,2004:257-279.
[16]刘世美.地震作用下底框架结构层间位移变形分析[J].有色金属设计,2011,38(1):32-35.
[17]张广成,彭桂蒸,单礼会,等.高强陶粒混凝土抗震性能研究[J].低温建筑技术,2010(3):42-44.
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