超细矿粉对植生再生混凝土抗压强度及pH值的影响
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摘要
为研究超细矿粉对植生再生混凝土性能的影响,测试了不同超细矿粉掺量的植生再生混凝土的抗压强度及pH值;利用XRD,SEM方法分析植生再生混凝土的水化产物和微观结构;介绍了植生再生混凝土的植物生长状况。研究表明,超细矿粉取代水泥率从0～80%的范围内,植生再生混凝土的抗压强度先增高后降低,当超细矿粉取代量为20%时,抗压强度达到极值; pH值随超细矿粉取代量增大而降低,当取代量为60%时,pH值为10. 08,可以保持水泥水化产物稳定存在;微观分析表明,随着超细矿粉取代率的提高,水化产物中的Ca(OH)_2含量降低。在试验条件下,植物可实现良好生长。
In order to study the effect of ultrafine slag powder on the performance of vegetation recycled aggregate concrete,the compressive strength and pH value of vegetation recycled aggregate concrete with different ultrafine slag powder content were tested. The hydration products and microstructure analysis of vegetation recycled aggregate concrete were analyzed by XRD and SEM. Describes the plant growth status of vegetation recycled aggregate concrete. Studies have shown that the ultrafine slag powder replaces the cement rate from 0-80%,and the compressive strength of the vegetation recycled aggregate concrete first increases and then decreases. When the ultrafine slag powder substitution amount is 20%, the compressive strength reaches the extreme value. The pH decreases as the substitution amount of the ultrafine slag powder increases,when the substitution amount is 60%,and the pH value is 10. 08.Microscopic analysis shows that the Ca( OH)_2 content in the hydration product decreases with the increase of the ultrafine slag powder substitution rate. Under the test conditions,plants can achieve good growth.
In order to study the effect of ultrafine slag powder on the performance of vegetation recycled aggregate concrete,the compressive strength and pH value of vegetation recycled aggregate concrete with different ultrafine slag powder content were tested. The hydration products and microstructure analysis of vegetation recycled aggregate concrete were analyzed by XRD and SEM. Describes the plant growth status of vegetation recycled aggregate concrete. Studies have shown that the ultrafine slag powder replaces the cement rate from 0-80%,and the compressive strength of the vegetation recycled aggregate concrete first increases and then decreases. When the ultrafine slag powder substitution amount is 20%, the compressive strength reaches the extreme value. The pH decreases as the substitution amount of the ultrafine slag powder increases,when the substitution amount is 60%,and the pH value is 10. 08.Microscopic analysis shows that the Ca( OH)_2 content in the hydration product decreases with the increase of the ultrafine slag powder substitution rate. Under the test conditions,plants can achieve good growth.
引文
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[14]王忠星,李秋义,曹瑜斌,等.硫酸盐侵蚀对再生混凝土多重界面显微结构的影响[J].硅酸盐通报,2017,36(2):443-448.
[15] Barnhouse P W,Srubar W V. Material characterization and hydraulic conductivity modeling of macroporous recycled-aggregate pervious concrete[J]. Construction and Buildings Materials,2016,110(2):89-97.
[2]柳橋邦生.植生型エココンクリート[J].コンクリ一ト工学. 1998,36(2):28-31.
[3] Chen F,Xu Y,Wang C,et al. Effects of concrete content on seed germination and seeding establishment in vegetation concrete matrix in slop restoration[J]. Ecological Engineering,2013,58:99-104.
[4] Guneyisi E,Gesoglu M,Kareem Q,et al. Effect of diffrnent substitution of natural aggregate by recycled aggregate on performance characteristics of pervious concrete[J]. Materials and Structures,2016,49(1-2):521-536.
[5] Chindaprasirt P,Nuaklong P,Zaetang Y,et al. Mechanical and thermal properties of recycling lightweight pervious concrete[J]. Arabian Journal Forscience and Engineering,2015,40(2):443-450.
[6]刘海峰.环境友好型植物生长多孔混凝土的研究与应用[D].南京:东南大学,2004.
[7]奚新国,倪亚茹,许仲梓,等.低碱度生态混凝土的初步研究[J].新型建筑材料,2003(3):40-41.
[8] Xu Y,Chen F Q. Effects of concrete content in vegetation concrete matrix on seed germination and seeding establishment of cynodondactylon[J].Procedia Engineering,2012,28:105-109.
[9]张亚梅,余保英.掺超细矿粉水泥基材料早龄期水化产物及孔结构特性[J].东南大学学报,2011,41(4):815-819.
[10]石云兴,张燕刚,刘伟,等.植生混凝土的性能与应用研究[J].施工技术,2015,44(24):18-21.
[11]任贺.超细粉对超高性能混凝土流动性及力学性能的影响[D].北京:北京交通大学,2018.
[12]颜小波.多孔生态混凝土的制备与性能研究[D].济南:济南大学,2013.
[13]刘小康.植物生长多孔混凝土的制备、性能与抗冻性研究[D].南京:东南大学,2006.
[14]王忠星,李秋义,曹瑜斌,等.硫酸盐侵蚀对再生混凝土多重界面显微结构的影响[J].硅酸盐通报,2017,36(2):443-448.
[15] Barnhouse P W,Srubar W V. Material characterization and hydraulic conductivity modeling of macroporous recycled-aggregate pervious concrete[J]. Construction and Buildings Materials,2016,110(2):89-97.