再生微粉基本性能及对胶砂性能的影响
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摘要
为了研究再生微粉的基本理化性能及其对胶砂抗压、抗折强度和微观结构的影响,本试验测试了再生微粉的基本物理性能指标,采用X射线衍射及荧光衍射法(XRD,XRF)分析了再生微粉的主要化学组成;将再生微粉作为矿物掺合料以不同掺量取代水泥,研究了再生微粉取代率对砂浆抗压、抗折强度及微观结构的影响规律。结果表明:(1)再生微粉粒径较大且质地疏松,其主要化学成分与普通硅酸盐水泥相近;(2)胶砂抗压、抗折强度随再生微粉掺量的增大而降低;(3)再生微粉掺量越大,砂浆微观结构越疏松多孔。再生微粉掺量在10%以内时,可以作为矿物掺合料替代水泥制备胶砂。
In order to study the basic physical and chemical properties of the recycled crushed concrete powder and its effect on the compressive strength,flexural strength and microstructure of the mortar,the basic physical properties of the recycled powder were tested in this experiment.The main chemical composition of the recycled crushed concrete powder was analyzed by XRD and XRF.The influence of the substitution rate of recycled fine powder on the compressive strength,flexural strength and microstructure of mortar was studied by replacing cement with different amount of the recycled powder.The results show that(1)The size of recycled crushed concrete powder is large and the texture is loose,and its main chemical composition is close to that of ordinary portland cement;(2)The compressive and flexural strength of mortar decreased with the increase of the recycled crushed concrete powder content;(3)With the increase of the amount of recycled crushed concrete powder,the microstructure of mortar is looser and porous.When the content of recycled crushed concrete powder is less than 10%,it can be used as mineral addmixture replacing cement to prepare mortar.
In order to study the basic physical and chemical properties of the recycled crushed concrete powder and its effect on the compressive strength,flexural strength and microstructure of the mortar,the basic physical properties of the recycled powder were tested in this experiment.The main chemical composition of the recycled crushed concrete powder was analyzed by XRD and XRF.The influence of the substitution rate of recycled fine powder on the compressive strength,flexural strength and microstructure of mortar was studied by replacing cement with different amount of the recycled powder.The results show that(1)The size of recycled crushed concrete powder is large and the texture is loose,and its main chemical composition is close to that of ordinary portland cement;(2)The compressive and flexural strength of mortar decreased with the increase of the recycled crushed concrete powder content;(3)With the increase of the amount of recycled crushed concrete powder,the microstructure of mortar is looser and porous.When the content of recycled crushed concrete powder is less than 10%,it can be used as mineral addmixture replacing cement to prepare mortar.
引文
[1] 李琴,张春红.不同激发剂激发建筑垃圾再生微粉活性研究[J].硅酸盐通报,2016,35(7):2187-2197.
[2] 李颖,郑胤.北京市建筑垃圾资源化利用政策研究[J].建筑科学,2008,24(10):4-8.
[3] 周文娟,陈家珑.绿色再生砂浆试验研究[J].武汉理工大学学报,2009(7):15-18.
[4] 毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93.
[5] 张修勤,李秋义,谢汝朋,等.再生微粉对混凝土的工作性及力学性能的影响研究[J].粉煤灰综合利用,2016(3):3-5.
[6] 孙岩,郭远臣.再生微粉制备辅助胶凝材料试验研究[J].低温建筑技术,2011(4):8-10.
[7] 朱有禄,邹卫雄.再生微粉与矿渣对水泥性能影响的对比分析[J].广西大学学报,2016,41(4):1214-1219.
[8] 张修勤,李秋义,岳公冰,等.再生微粉对水泥胶砂性能的影响[J].混凝土,2015(8):120-122.
[9] OKSRI-NELFIA L,MAHIEUX P Y.Reuse of recycled crushed concrete fines as mineral addition in cementitious materials[J].Materials and Structure,2015(11):3239-3251.
[10] EUNHEE K,JAECHEOL A.A study on development of recycled cement made from waste cementitious powder[J].Construction and Building Materials,2015,83:174-180.
[11] 中国建筑材料科学院水泥科学与新型建筑材料研究所.水泥胶砂强度检验方法(ISO法):GB/T 17671—1999[S].北京:中国建筑工业出版社,1999.
[12] 陈雪,李秋义.再生微粉的性能及应用[J].青岛理工大学学报,2013,34(3):18-21.
[13] 刘香,运喜刚,张君瑞,等.再生微粉制备泡沫混凝土的试验研究[J].新型建筑材料,2016(3):77-80.
[14] 张利娟.再生微粉—水泥复合胶凝材料的水化性能[J].混凝土与水泥制品,2013(6):14-17.
[15] 刘栋,张鹏宇,刘彤,等.建筑垃圾中再生微粉材性表征及潜在活性的激发[J].硅酸盐通报,2016(8):2635-2641.
[16] 余小小,李如燕,董祥,等.机械力粉磨对再生微粉性能的影响[J].人工晶体学报,2017(4):688-692.
[2] 李颖,郑胤.北京市建筑垃圾资源化利用政策研究[J].建筑科学,2008,24(10):4-8.
[3] 周文娟,陈家珑.绿色再生砂浆试验研究[J].武汉理工大学学报,2009(7):15-18.
[4] 毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93.
[5] 张修勤,李秋义,谢汝朋,等.再生微粉对混凝土的工作性及力学性能的影响研究[J].粉煤灰综合利用,2016(3):3-5.
[6] 孙岩,郭远臣.再生微粉制备辅助胶凝材料试验研究[J].低温建筑技术,2011(4):8-10.
[7] 朱有禄,邹卫雄.再生微粉与矿渣对水泥性能影响的对比分析[J].广西大学学报,2016,41(4):1214-1219.
[8] 张修勤,李秋义,岳公冰,等.再生微粉对水泥胶砂性能的影响[J].混凝土,2015(8):120-122.
[9] OKSRI-NELFIA L,MAHIEUX P Y.Reuse of recycled crushed concrete fines as mineral addition in cementitious materials[J].Materials and Structure,2015(11):3239-3251.
[10] EUNHEE K,JAECHEOL A.A study on development of recycled cement made from waste cementitious powder[J].Construction and Building Materials,2015,83:174-180.
[11] 中国建筑材料科学院水泥科学与新型建筑材料研究所.水泥胶砂强度检验方法(ISO法):GB/T 17671—1999[S].北京:中国建筑工业出版社,1999.
[12] 陈雪,李秋义.再生微粉的性能及应用[J].青岛理工大学学报,2013,34(3):18-21.
[13] 刘香,运喜刚,张君瑞,等.再生微粉制备泡沫混凝土的试验研究[J].新型建筑材料,2016(3):77-80.
[14] 张利娟.再生微粉—水泥复合胶凝材料的水化性能[J].混凝土与水泥制品,2013(6):14-17.
[15] 刘栋,张鹏宇,刘彤,等.建筑垃圾中再生微粉材性表征及潜在活性的激发[J].硅酸盐通报,2016(8):2635-2641.
[16] 余小小,李如燕,董祥,等.机械力粉磨对再生微粉性能的影响[J].人工晶体学报,2017(4):688-692.
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