生物碳制备净水型透水混凝土研究  

Study on Preparation of Water-purifying Permeable Concrete with Biochar

作　　者：丁华柱 杨翔 都增延 张建林 黄和兵 栾柏青 Ding Huazhu;Yang Xiang;Du Zengyan;Zhang Jianlin;Huang(Hebing,Luan Baiqing)

机构地区：[1]成都建工第三建筑工程有限公司,四川成都610023 [2]重庆市綦江区朝野混凝土有限公司,重庆401420 [3]重庆四方新材股份有限公司,重庆401307 [4]重庆建工建材物流有限公司,重庆401122 [5]应城市白杨商砼股份有限公司,湖北孝感432400 [6]吉水县恒辉建筑工程质量检测有限公司,江西吉安331600 [7]四川奕华工程质量检测有限公司,四川攀枝花617000

出　　处：《重庆建筑》2023年第7期38-41,共4页Chongqing Architecture

摘　　要：透水混凝土是一种多孔材料,常用于透水路面和生态护坡。生物碳具有吸附污染物和改善混凝土性能的特性。因此,该文研究了不同掺量的生物碳改性透水混凝土对污水的净化性能。试验结果表明,当生物碳掺量为20kg/m^(3)时,与空白组相比,抗压强度增加了48.3%、劈裂抗拉强度增加了16.6%,透水混凝土对污水具有明显的净化性能,在透水混凝土中添加生物碳可以进一步提高总氮和总磷的去除能力。与空白组相比,当生物碳含量为20kg/m^(3)时,总氮和总磷的去除效率分别提高了57.6%和22.6%。随着生物碳含量的增加,吸附量增加,而样品的孔隙率降低,不利于微生物的生长。因此,生物碳含量适中的透水混凝土具有最佳的净水性能,建议生物碳掺量为20kg/m3。Pervious concrete is a kind of porous material,which is often used in pervious pavement and ecological slope protection.Biochar has the characteristics of adsorbing pollutants and improving the performance of concrete.Therefore,this paper studied the purification performance of different amounts of biochar modified pervious concrete on sewage.The experimental results showed that when the content of biochar is 20kg/m^(3),compared with the blank group,the compressive strength increases by 48.3%and the splitting tensile strength rises by 16.6%.Pervious concrete has remarkable purification performance for sewage.Adding biochar to pervious concrete can further improve the removal capacity of the total nitrogen and total phosphorus.Compared with the control group,when the biochar content was 20kg/m^(3),the removal efficiency of total nitrogen and total phosphorus increased by 57.6%and 22.6%respectively.With the increase of the biochar content,the adsorption capacity increases,while the porosity of the sample decreases,which is not conducive to the growth of microorganisms.Therefore,pervious concrete with a moderate biochar content displays the best water purification performance,and the recommended amount of biochar is 20kg/m^(3).

关 键 词：透水混凝土 水的净化 生物碳 

分 类 号：TU528[建筑科学—建筑技术科学]