泡沫轻质混凝土性能与孔结构关系研究
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摘要
为满足工程应用需要,针对600 kg/cm~3和800 kg/cm~3密度等级的泡沫轻质混凝土,分析了不同密度和水胶比时的抗压强度与孔结构关系。研究结果表明,泡沫轻质混凝土的平均孔径随水胶比增大而增大;泡沫轻质混凝土平均孔径随密度等级升高而下降,当密度等级从600 kg/cm~3增大到800 kg/cm~3时,平均孔径变化约为24.5%～25.4%,孔隙率变化约为2.8%～16.6%;抗压强度随水胶比增大呈先增大后下降的趋势。
The relationship between porosity and compressive strength of foamed mixture lightweight concrete with different density and water-binder ratio is investigated for foamed mixture lightweight concrete of 600 kg/cm~3 and 800 kg/cm~3 densities for engineering fields. The results show that the average pore size of foamed lightweight concrete increases with increasing water-binder ratio;the average pore size of foamed lightweight concrete decreases with increasing density grade,and the average pore size changes about 24.5%～25.4%,and the porosity changes about 2.8%～16.6% with the density grade of foamed lightweight concrete increasing from 600 kg/cm~3 to 800 kg/cm~3;the compressive strength of the foamed lightweight concrete increases with increasing water-binder ratio,and then decreases.
The relationship between porosity and compressive strength of foamed mixture lightweight concrete with different density and water-binder ratio is investigated for foamed mixture lightweight concrete of 600 kg/cm~3 and 800 kg/cm~3 densities for engineering fields. The results show that the average pore size of foamed lightweight concrete increases with increasing water-binder ratio;the average pore size of foamed lightweight concrete decreases with increasing density grade,and the average pore size changes about 24.5%～25.4%,and the porosity changes about 2.8%～16.6% with the density grade of foamed lightweight concrete increasing from 600 kg/cm~3 to 800 kg/cm~3;the compressive strength of the foamed lightweight concrete increases with increasing water-binder ratio,and then decreases.
引文
[1] 孙亚飞,耿飞,高培伟,等.掺聚丙烯纤维泡沫混凝土性能与仿真分析[J].南京理工大学学报,2016,40(4):504-508.Sun Yafei,Geng Fei,Gao Peiwei,et al.Properties and simulation analysis of foamed concrete with polypropylene fiber[J].Journal of Nanjing University of Science and Technology,2016,40(4):504-508.
[2] Wee T,Daneti S,Tamilselvan T.Effect of w/c ratio on air-void system of foamed concrete and their influence on mechanical properties[J].Magazine of Concrete Research,2011,63(8):583-595.
[3] Sun Yafei,Gao Peiwei,Geng Fei,et al.Thermal conductivity and mechanical properties of porous concrete materials[J].Materials Letters,2017,209:349-352.
[4] Hwang C,Tran V.A study of the properties of foamed lightweight aggregate for self-consolidating concrete[J].Construction & Building Materials,2015,87:78-85.
[5] Gao Peiwei,Lu Xiaoling,Yang Chuanxi,et al.Microstructure and pore structure of concrete mixed with superfine phosphorous slag and superplasticizer[J].Construction & Building Materials,2008,22(5):837-840.
[6] Nguyen T,Bui H,Ngo T,et al.Experimental and numerical investigation of influence of air-voids on the compressive behaviour of foamed concrete[J].Materials & Design,2017,130:103-119.
[7] 习雨同.泡沫混凝土气孔结构与性能研究[D].南京:南京航空航天大学航空学院,2016.
[8] Hilal A,Thom N,Dawson A.On entrained pore size distribution of foamed concrete[J].Construction & Building Materials,2015,75:227-233.
[9] Nambiar E,Ramamurthy K.Air-void characterisation of foam concrete[J].Cement & Concrete Research,2007,37(2):221-230.
[10] Liu Zhongwei,Zhao Kang,Hu Chi,et al.Effect of water-cement ratio on pore structure and strength of foam concrete[J].Advances in Materials Science and Engineering,2016,2016:1-9.
[11] Sang Guochen,Zhu Yiyun,Yang Gang,et al.Influence of water-cement ratio on property of light weight cement based foam material[J].Journal of Materials Science and Engineering,2015,33(3):339-342.
[12] GB 175-2007,通用硅酸盐水泥[S].
[13] GB/T 1596-2005,用于水泥和混凝土中的粉煤灰[S].
[14] Abd A,Abd S.Modelling the strength of lightweight foamed concrete using support vector machine(SVM)[J].Case Studies in Construction Materials,2017,6:8-15.
[15] Jiang Jun,Lu Zhongyuan,Niu Yunhui,et al.Study on the preparation and properties of high-porosity foamed concretes based on ordinary Portland cement[J].Materials & Design,2016,92:949-959.
[2] Wee T,Daneti S,Tamilselvan T.Effect of w/c ratio on air-void system of foamed concrete and their influence on mechanical properties[J].Magazine of Concrete Research,2011,63(8):583-595.
[3] Sun Yafei,Gao Peiwei,Geng Fei,et al.Thermal conductivity and mechanical properties of porous concrete materials[J].Materials Letters,2017,209:349-352.
[4] Hwang C,Tran V.A study of the properties of foamed lightweight aggregate for self-consolidating concrete[J].Construction & Building Materials,2015,87:78-85.
[5] Gao Peiwei,Lu Xiaoling,Yang Chuanxi,et al.Microstructure and pore structure of concrete mixed with superfine phosphorous slag and superplasticizer[J].Construction & Building Materials,2008,22(5):837-840.
[6] Nguyen T,Bui H,Ngo T,et al.Experimental and numerical investigation of influence of air-voids on the compressive behaviour of foamed concrete[J].Materials & Design,2017,130:103-119.
[7] 习雨同.泡沫混凝土气孔结构与性能研究[D].南京:南京航空航天大学航空学院,2016.
[8] Hilal A,Thom N,Dawson A.On entrained pore size distribution of foamed concrete[J].Construction & Building Materials,2015,75:227-233.
[9] Nambiar E,Ramamurthy K.Air-void characterisation of foam concrete[J].Cement & Concrete Research,2007,37(2):221-230.
[10] Liu Zhongwei,Zhao Kang,Hu Chi,et al.Effect of water-cement ratio on pore structure and strength of foam concrete[J].Advances in Materials Science and Engineering,2016,2016:1-9.
[11] Sang Guochen,Zhu Yiyun,Yang Gang,et al.Influence of water-cement ratio on property of light weight cement based foam material[J].Journal of Materials Science and Engineering,2015,33(3):339-342.
[12] GB 175-2007,通用硅酸盐水泥[S].
[13] GB/T 1596-2005,用于水泥和混凝土中的粉煤灰[S].
[14] Abd A,Abd S.Modelling the strength of lightweight foamed concrete using support vector machine(SVM)[J].Case Studies in Construction Materials,2017,6:8-15.
[15] Jiang Jun,Lu Zhongyuan,Niu Yunhui,et al.Study on the preparation and properties of high-porosity foamed concretes based on ordinary Portland cement[J].Materials & Design,2016,92:949-959.
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