为了研究页岩陶粒的颗粒级配对植生型多孔混凝土密度、抗压强度、空隙率以及内部空隙pH值的影响,设置2种页岩陶粒颗粒级配,测其堆积密度、表观密度、空隙率和吸水率等基本物理性质,对页岩陶粒进行植生型多孔混凝土的配合比设计计算。黄棕壤土中掺杂适量的粉煤灰、复合肥、FeSO4和醋酸乙烯乳液制成改性土壤,改性土壤、腐殖质、蛭石粉末按2∶2∶1的比例加水调成流动度为210~240 mm的种植基质浆体,采用上置式和中置式2种种植构造进行植生试验。结果表明:12组植生型多孔混凝土的密度随颗粒级配和设计目标空隙率的变化在600~800 kg/m3之间变化,28 d龄期的混凝土抗压强度在5 MPa以上,内部空隙部位的pH值在11~12之间;配制的种植基质取得了良好的植生效果,在必要的养护和管理条件下,植物完全可以在2种种植构造中健康地生长。
Abstract
The aim of this research is to study the influence of grain size distribution of shale ceramsite on the bulk density, compressive strength, void ratio and pH value in the internal voids of porous concrete for plant growing. First of all, we set up two groups of grain size distribution of shale ceramsite, and measured the basic physical properties such as stack density, apparent density, void ratio and bibulous rate for mixture proportion design. Furthermore, we added fly ash, compound fertilizer, FeSO4 and vinyl acetate emulsion into yellow brown loam to prepare modified soil, which was further mixed with humus and vermiculite powder in a proportion of 2∶2∶1 to obtain planting substrate flurry of a fluidity of 210-240 mm. Then we carried out planting tests with two planting structures: a. seeds in humus overhead the porous concrete; b. seeds in substrate among voids of the porous concrete. Test results showed that with the changes of grain size distribution and target void ratio, the bulk density of 12 groups of porous concrete varied between 600-800 kg/m3; compressive strength of the porous concrete at the age of 28-day was above 5 MPa; and the pH value of internal voids between 11 to 12. Under necessary maintenance and management conditions, plants could completely grow well in the porous concrete, indicating that the mixture proportion of planting substrate is good.
关键词
页岩陶粒 /
多孔混凝土 /
密度 /
pH值 /
抗压强度 /
空隙率 /
植生
Key words
shale ceramsite /
porous concrete /
bulk density /
pH value /
compressive strength /
void fraction /
vegetating
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参考文献
[1] 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.[2] 张 蔚.植生混凝土种植构造及营养土的配制研究[J].混凝土,2012,(11):124-127.[3] YANAGIBASHI K,YONEZAWA T.Properties and Performance of Green Concrete[C]∥Recent Advances in Concrete Technology. Tokushima, Japan. June 7-11, 1998:141-158.[4] 张盛斌.针对城区河道的生态护坡技术研究[D].广州:暨南大学,2011.[5] 邢振贤,柴琰琰,张艳鸽.无砂大孔生态混凝土关键指标评述[J].人民长江,2011,42(7):74-76.[6] 黄剑鹏.适于南方城市河道的护砌植生混凝土研制及性能研究[D].广州:华南理工大学,2011.[7] 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.[8] 杨 毅.陶粒混凝土的若干基本性能与构件承载力可靠性研究[D].长沙:长沙理工大学,2009.[9] 奚新国,许仲梓.黏土陶粒制备多孔混凝土的初步研究[J].建筑技术,2013,44(11):1028-1030.[10]彭 波.植生型多孔混凝土护岸的应用研究[D].长沙:长沙理工大学,2013.[11]蒋友新,张开猛,谭克峰,等.植生型多孔混凝土的配合比及力学性能研究[J].混凝土,2006,(12):22-24. [12]姜德民,王凤春,白子刚,等.正交设计在环保型绿化混凝土种植中的应用[J].混凝土, 2004,(11):74-77.[13]董建伟.绿化混凝土上草坪植物所需营养元素及供给[J].吉林水利,2004,(2):1-5. [14]许燕莲,李荣炜,谭学军,等.植被型多孔混凝土的制备与植生试验[J].新型建筑材料,2009,36(2):16-20.[15]CHINDAPRASIRT P, HATANAKA S, CHAREERAT T,et al. Cement Paste Characteristics and Porous Concrete Properties[J].Construction and Building Materials,2008,22(5):894-901.[16]吴 磊.生态植草混凝土工程应用研究[D].武汉:武汉理工大学,2011.[17]霍俊芳.轻骨料混凝土的研究现状与发展[J].建筑技术,2009,40(4):363-365.[18]EDVARDSEN C. Green Concrete Sustainable Design and Maintenance of Concrete Structures[C]∥American Concrete Institute. Fifth CANMET/ACI International Conference on Durability of Concrete. Manaus, Amazon State, Brazil, June 18-20, 2008:607-617.[19]MALHOTRA V M. No-fines Concrete: Its Properties and Applications[J]. ACI Journal,1976,(11):628-644.[20]张朝辉.多孔植被混凝土的研究[D].重庆:重庆大学,2006.[21]王成名.再生砖骨料植生混凝土制备技术和工程应用研究[D].济南:山东农业大学,2014.[22]PARK S B, TIA M. An Experiment Study on the Water-purification Properties of Porous Concrete[J].Cement and Concrete Research,2004,34(2):177-184.[23]佟 洁.植生型生态混凝土材料制备及其净水性能研究[D].大连:大连理工大学,2014.[24]GB 50164—2011, 混凝土质量控制标准[S].北京:中国建筑工业出版社,2012.[25]黄剑鹏,胡勇有.植生型多孔混凝土的制备与性能研究[J].混凝土,2011,(2):101-104.[26]李政启, 相 阳,李家明,等.植生型无砂多孔生态混凝土性能评述[J].建筑节能,2012,40(4):50-53.[27]刘梦溪,卢经扬,于得水.可恢复植被的环保混凝土植生试验研究[J].混凝土,2007,(6):106-109. [28]蒋友新,张开猛,缪缓钰.植生型多孔混凝土植物生长适应性研究[J]. 路基工程,2008, (3):52-54.
基金
国家自然科学基金项目(41202250);长江科学院开放研究基金项目(CKWV2015205/KY);三峡大学研究生科研创新基金项目(SDYC2016023)
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