掺水滑石生态混凝土物理力学及水质净化性能研究
|
摘要
研制了一种掺水滑石生态混凝土(HEC),并通过试验研究了水滑石掺量、骨料粒径对HEC物理力学性能、净水效果的影响。结果表明:增大骨料粒径可有效提高HEC孔隙率,但会降低抗压强度,而水滑石掺量对其物理力学性能的影响并不明显。在净水试验方面,增大骨料粒径可提高TN、TP的去除率,而水滑石的增加只能提高TP的去除率。当骨料粒径为16. 5～31. 5 mm,水滑石掺量取5 kg/m~3时,孔隙率为28. 51%,抗压强度为5. 6 MPa,TN去除率为46. 8%,TP去除率则可达到最大值78. 1%,此时HEC的净水效果相对最优,其物理力学性能也基本满足应用要求。
A kind of hydrotalcite doped eco-concrete (HEC) was developed. The effect of hydrotalcite content and aggregate particle size on the physical and mechanical properties of HEC and the effect of water purification were studied by experiments. The results show that increasing the aggregate size can effectively increase the porosity of HEC, but it will reduce the compressive strength, while the hydrotalcite content has no obvious effect on its physical and mechanical properties. In the water purification test,increasing the particle size of the aggregate can increase the removal rate of TN and TP,while the increase of hydrotalcite can only increase the removal rate of TP. When the aggregate particle size is 16. 5-31. 5 mm and hydrotalcite dosage is 5 kg/m~3,the porosity is 28. 51%,the compressive strength is 5. 6 MPa,the TN removal rate is 46. 8%,and the TP removal rate can reach a maximum of 78. 1%,at this time,the water purification effect of HEC is relatively optimal,and its physical and mechanical properties basically meet the application requirements.
A kind of hydrotalcite doped eco-concrete (HEC) was developed. The effect of hydrotalcite content and aggregate particle size on the physical and mechanical properties of HEC and the effect of water purification were studied by experiments. The results show that increasing the aggregate size can effectively increase the porosity of HEC, but it will reduce the compressive strength, while the hydrotalcite content has no obvious effect on its physical and mechanical properties. In the water purification test,increasing the particle size of the aggregate can increase the removal rate of TN and TP,while the increase of hydrotalcite can only increase the removal rate of TP. When the aggregate particle size is 16. 5-31. 5 mm and hydrotalcite dosage is 5 kg/m~3,the porosity is 28. 51%,the compressive strength is 5. 6 MPa,the TN removal rate is 46. 8%,and the TP removal rate can reach a maximum of 78. 1%,at this time,the water purification effect of HEC is relatively optimal,and its physical and mechanical properties basically meet the application requirements.
引文
[1]中国环境监测总站.2018年全国地表水水质月报[R].北京:中国环境监测总站,2018.
[2]严雄风,刘迎云,虢清伟,等.组合骨料型百喜草植生混凝土去除氮磷[J].环境工程学报,2016,10(3):1171-1176.
[3]Kim G M,Jang J G,Khalid H R,et al.Water purification characteristics of pervious concrete fabricated with CSA cement and bottom ash aggregates[J].Construction&Building Materials,2017,136:1-8.
[4]Park S B,Tia M.An experimental study on the water-purification properties of porous concrete[J].Cement&Concrete Research,2004,34(2):177-184.
[5]Mehrani M J,Alighardashi A,Ramezanianpour A M.An experimental study on the nitrate removal ability of aggregates used in pervious concrete[J].Desalination&Water Treatment,2017,86:124-130.
[6]Jang J G,Ahn Y B,Souri H,et al.A novel eco-friendly porous concrete fabricated with coal ash and geopolymeric binder:heavy metal leaching characteristics and compressive strength[J].Construction&Building Materials,2015,79:173-181.
[7]Hwang V,Masters A,Arocho M,et al.Fly ash-amended pervious concrete pavement followed by bamboo bioretention basin with Dracaena sanderiana for urban stormwater runoff control[J].Construction&Building Materials,2017,132:161-169.
[8]Nishimura F,Yamada T,Tanaka M.Ammonia removal characteristic of porous concrete with zeolite for enhancing self-purification ability in river system[J].International Journal of Geomate Geotechnique Construction Materials&Environment,2015,8:1130-1137.
[9]Song W J,Fu H Y,Wang G Y.Study on a kind of eco-concrete retaining wall's block with water purification function[J].Procedia Engineering,2012,28:182-189.
[10]李奎鹏.河道直立式硬质护岸生态化改造技术研究[D].南京:东南大学,2016.
[11]Yuan D H,Guo X J,Xiong Y,et al.Pollutant-removal performance and variability of DOM quantity and composition with traditional ecological concrete(TEC)and improved multi-aggregate eco-concrete(IMAEC)revetment treatments[J].Ecological Engineering,2017,105:141-149.
[12]Kim H H,Park C G.Plant growth and water purification of porous vegetation concrete formed of blast furnace slag,natural jute fiber and styrene butadiene latex[J].Sustainability,2016,8(4):386-402.
[13]Luengo C V,Volpe M A,Avena M J.High sorption of phosphate on Mg-Al layered double hydroxides:kinetics and equilibrium[J].Journal of Environmental Chemical Engineering,2017,5(5):4656-4662.
[14]林巧莺,陈岳民.碳酸根型镁铝水滑石对铬酸根和磷酸根离子的吸附性能[J].环境工程学报,2015,9(10):4687-4696.
[15]高建民.生态型多孔混凝土物理与力学性能试验方法(征求意见稿)[J].建筑砌块与砌块建筑,2012(5):49-56.
[16]李战国,刘金鹏,于鹏超,等.水滑石类化合物对混凝土物理力学性能影响的探索研究[J].建筑技术开发,2017,44(17):95-97.
[17]李树山,高丹盈.粗骨料粒径对卵石混凝土抗压强度影响的试验研究[J].混凝土,2013(2):59-61.
[18]Basheer L,Basheer P A M,Long A E.Influence of coarse aggregate on the permeation,durability and the microstructure characteristics of ordinary Portland cement concrete[J].Construction&Building Materials,2005,19(9):682-690.
[19]张军华.人造骨料可循环混凝土中界面过渡区结构演变及其对性能的影响[D].济南:济南大学,2013.
[20]蒋钦凤,喻杏元,艾玉明,等.煅烧水滑石对硝态氮的吸附性能研究[J].湖北大学学报(自科版),2016,38(3):201-207.
[2]严雄风,刘迎云,虢清伟,等.组合骨料型百喜草植生混凝土去除氮磷[J].环境工程学报,2016,10(3):1171-1176.
[3]Kim G M,Jang J G,Khalid H R,et al.Water purification characteristics of pervious concrete fabricated with CSA cement and bottom ash aggregates[J].Construction&Building Materials,2017,136:1-8.
[4]Park S B,Tia M.An experimental study on the water-purification properties of porous concrete[J].Cement&Concrete Research,2004,34(2):177-184.
[5]Mehrani M J,Alighardashi A,Ramezanianpour A M.An experimental study on the nitrate removal ability of aggregates used in pervious concrete[J].Desalination&Water Treatment,2017,86:124-130.
[6]Jang J G,Ahn Y B,Souri H,et al.A novel eco-friendly porous concrete fabricated with coal ash and geopolymeric binder:heavy metal leaching characteristics and compressive strength[J].Construction&Building Materials,2015,79:173-181.
[7]Hwang V,Masters A,Arocho M,et al.Fly ash-amended pervious concrete pavement followed by bamboo bioretention basin with Dracaena sanderiana for urban stormwater runoff control[J].Construction&Building Materials,2017,132:161-169.
[8]Nishimura F,Yamada T,Tanaka M.Ammonia removal characteristic of porous concrete with zeolite for enhancing self-purification ability in river system[J].International Journal of Geomate Geotechnique Construction Materials&Environment,2015,8:1130-1137.
[9]Song W J,Fu H Y,Wang G Y.Study on a kind of eco-concrete retaining wall's block with water purification function[J].Procedia Engineering,2012,28:182-189.
[10]李奎鹏.河道直立式硬质护岸生态化改造技术研究[D].南京:东南大学,2016.
[11]Yuan D H,Guo X J,Xiong Y,et al.Pollutant-removal performance and variability of DOM quantity and composition with traditional ecological concrete(TEC)and improved multi-aggregate eco-concrete(IMAEC)revetment treatments[J].Ecological Engineering,2017,105:141-149.
[12]Kim H H,Park C G.Plant growth and water purification of porous vegetation concrete formed of blast furnace slag,natural jute fiber and styrene butadiene latex[J].Sustainability,2016,8(4):386-402.
[13]Luengo C V,Volpe M A,Avena M J.High sorption of phosphate on Mg-Al layered double hydroxides:kinetics and equilibrium[J].Journal of Environmental Chemical Engineering,2017,5(5):4656-4662.
[14]林巧莺,陈岳民.碳酸根型镁铝水滑石对铬酸根和磷酸根离子的吸附性能[J].环境工程学报,2015,9(10):4687-4696.
[15]高建民.生态型多孔混凝土物理与力学性能试验方法(征求意见稿)[J].建筑砌块与砌块建筑,2012(5):49-56.
[16]李战国,刘金鹏,于鹏超,等.水滑石类化合物对混凝土物理力学性能影响的探索研究[J].建筑技术开发,2017,44(17):95-97.
[17]李树山,高丹盈.粗骨料粒径对卵石混凝土抗压强度影响的试验研究[J].混凝土,2013(2):59-61.
[18]Basheer L,Basheer P A M,Long A E.Influence of coarse aggregate on the permeation,durability and the microstructure characteristics of ordinary Portland cement concrete[J].Construction&Building Materials,2005,19(9):682-690.
[19]张军华.人造骨料可循环混凝土中界面过渡区结构演变及其对性能的影响[D].济南:济南大学,2013.
[20]蒋钦凤,喻杏元,艾玉明,等.煅烧水滑石对硝态氮的吸附性能研究[J].湖北大学学报(自科版),2016,38(3):201-207.