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《Journal of Shenyang Jianzhu University(Natural Science)》 2006-05
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Several Factors of Effect on Strength of Porous Concrete

ZHANG Jusong~1,ZHANG Tianhua~1,SONG Dongsheng~2,RAN Zongliang~2,WANG Wenjun~1,ZHENG Wanrong~1,JIN Jianwei~1,BAI Hongbin~1(1.School of Material Science and Engineering,Shenyang Jianzhu University,Shenyang,China,110168;2.Shenyang Taifeng Special Concrete Company,Shenyang,China,110002)  
On the basis of studying factors that affects porous concrete strength,prepared surface materials with compressive strength more than 30?MPa and meet requirements of permeability modulus more than 1?mm/s.Light strike is used to dense,using coarse aggregate level test and changing the quantity of small aggregate test,determining the best coarse aggregate level.Reasonable water cement ratio has been determined according to relations curve between water cement ratio and the intensity and the permeability modulus;Stamping times increase as the strength and body density of porous concrete increase,when reaching 18,strength and body density stabilized;coarse aggregate exists the best level,when the proportion of the quantity of 5~10?mm and 5~25?mm coarse aggregates achieves 1:1,the void rate is minimum;make sure the permeability capacity,with the quantity of small aggregates increasing,the strength of porous concrete also increased,the best quantity of sands is 20% of coarse aggregate;when the quantity of cement remain unchanged,with the water cement ratio increasing,the strength of porous concrete increases after the first reduction;Best water cement ratio in this research is 0.26;The premise to make sure permeability capacity,stamping is well used as dense manner,the choice of optimal allocation and controlling the quantity of sands and water cement ratio.It is inevitable to confect porous concrete with intensity more than 30?MPa and permeability capacity meeting requirements.
【Fund】: 辽宁省教育厅项目(202083064);; 沈阳市建委科技攻关项目
【CateGory Index】: TU528
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