基于孔结构参数的掺CWCPM混凝土抗压强度预测模型的建立
|
摘要
为提高废旧粘土砖活性,将废砖破碎、粉磨后进行活性激发,制得建筑垃圾复合粉体材料(Construction waste composite powder materials,CWCPM)。为进一步研究CWCPM作为混凝土掺合料的可行性,首先研究不同因素对掺CWCPM混凝土抗压强度及孔结构参数的影响规律。然后,分析孔隙参数、孔径分布参数与抗压强度之间的关系。最后,基于多元回归理论,建立同时考虑孔隙参数与孔径分布参数的掺CWCPM的混凝土的抗压强度-孔结构关系模型。结果表明,CWCPM的掺入降低了混凝土7 d抗压强度。当CWCPM掺量不高于30%时,试件28 d强度高于基准试件,CWCPM可作为混凝土掺合料进行再生利用。总孔隙面积越大,总孔隙量、平均孔径和孔隙率越小,混凝土抗压强度越高。抗压强度与毛细孔及大孔数量均为负相关关系,而与凝胶孔及过渡孔含量之间未表现出显著的定量关系。考虑孔隙参数与孔径分布的抗压强度-孔结构模型可准确地预测掺CWCPM的混凝土的抗压强度。
In order to improve the activity of waste brick,compounded it with fly ash,mineral powder and alkali-activator to form the construction waste composite powder materials( CWCPM). For further study the feasibility of CWCPM as concrete admixture,studied the pore structure of different concretes mixed with CWCPM by the method of mercury injection,analyzed the relationship between compressive strength of the concrete and pore parameters,pore size distribution,set up compressive strength-pore structure prediction model through multiple regression by considering the pore parameters and pore size distribution. Results show that CWCPM reduces 7 d compressive strength of the specimen; when its dosage is less than 30%,the 28 d compressive strength is higher than that of the control specimen; the greater total pore area and the smaller total pore volume,average pore diameter and porosity indicate higher strength value; the compressive strength shows a negative correlation with the number of capillary pore and large pore,and has no obvious relation with the number of gel pore and transition pore; the compressive strength-pore structure model which considers the pore parameters and pore size distribution can accurately predict the compressive strength of concrete mixing with CWCPM.
In order to improve the activity of waste brick,compounded it with fly ash,mineral powder and alkali-activator to form the construction waste composite powder materials( CWCPM). For further study the feasibility of CWCPM as concrete admixture,studied the pore structure of different concretes mixed with CWCPM by the method of mercury injection,analyzed the relationship between compressive strength of the concrete and pore parameters,pore size distribution,set up compressive strength-pore structure prediction model through multiple regression by considering the pore parameters and pore size distribution. Results show that CWCPM reduces 7 d compressive strength of the specimen; when its dosage is less than 30%,the 28 d compressive strength is higher than that of the control specimen; the greater total pore area and the smaller total pore volume,average pore diameter and porosity indicate higher strength value; the compressive strength shows a negative correlation with the number of capillary pore and large pore,and has no obvious relation with the number of gel pore and transition pore; the compressive strength-pore structure model which considers the pore parameters and pore size distribution can accurately predict the compressive strength of concrete mixing with CWCPM.
引文
1 Zhang Y.Mechanical property of recycled coarse aggregate concrete and precasted wall slab members made with construction waste of clay brick.Ph.D.Thesis,Zhengzhou University,China,2014(in Chinese).张?.建筑垃圾废砖再生粗骨料混凝土及预制墙板受力性能研究.博士学位论文,郑州大学,2014.
2 Yi C.The study on the resource recovery of construction waste for recycled aggregate concrete.Master’s Thesis,Jinan University,China,2014(in Chinese).易超.建筑垃圾资源化制备再生骨料混凝土的研究.硕士学位论文,暨南大学,2014.
3 Levy S M,Helene P.Cement&Concrete Research,2004,34(11),1975.
4 Kou S C,Chi S P,Etxeberria M.Cement&Concrete Composites,2014,53(10),73.
5 Xue C Z,Shen A Q,Guo Y C,et al.Materials Review B:Research Papers,2016,30(5),130(in Chinese).薛翠真,申爱琴,郭寅川,等.材料导报:研究篇,2016,30(5),130.
6 Chen M Z,Lin J T,Wu S P,et al.Construction&Building Materials,2011,25(4),1532.
7 Xiao S Y,Zhu L.Journal of Shenyang Jianzhu University(Natural Science),2016(4),608(in Chinese).肖诗云,朱梁.沈阳建筑大学学报(自然科学版),2016(4),608.
8 Xie C,Wang Q C,Li S,et al.Bulletin of the Chinese Ceramic Society,2015,34(12),3695(in Chinese).谢超,王起才,李盛,等.硅酸盐通报,2015,34(12),3695.
9 Bu J,Tian Z.Sādhanā,2016,41(3),1.
10 Wei J X,Yu Q J,Zeng X X,et al.Journal of South China University of Technology(Natural Science Edition),2007,35(2),121(in Chinese).韦江雄,余其俊,曾小星,等.华南理工大学学报(自然科学版),2007,35(2),121.
11 Ma G J,Guo X Y,Huang W X,et al.Bulletin of the Chinese Ceramic Society,2016(7),2259(in Chinese).马国金,郭秀艳,黄文先,等.硅酸盐通报,2016(7),2259.
12 Das B B,Kondraivendhan B.Construction&Building Materials,2012,28(1),382.
13 Khatib J M,Mangat P S.Cement&Concrete Composites,1999,21(5-6),431.
14 Xue C Z,Shen A Q,Guo Y C,et al.Journal of Jiangsu University(Nature Science Edition),2017,38(3),343(in Chinese).薛翠真,申爱琴,郭寅川,等.江苏大学学报(自然科学版),2017,38(3),343.
15 Bensted J.Structure and properties of cement,Chemical Industry Press,China,2008(in Chinese).本斯迪德.水泥的结构和性能,化学工业出版社,2008.
16 Mehta P K.In:Proceedings of 8th International Congress on the Chemistry of Cement.Rio de Janeiro,1986,pp.113.
2 Yi C.The study on the resource recovery of construction waste for recycled aggregate concrete.Master’s Thesis,Jinan University,China,2014(in Chinese).易超.建筑垃圾资源化制备再生骨料混凝土的研究.硕士学位论文,暨南大学,2014.
3 Levy S M,Helene P.Cement&Concrete Research,2004,34(11),1975.
4 Kou S C,Chi S P,Etxeberria M.Cement&Concrete Composites,2014,53(10),73.
5 Xue C Z,Shen A Q,Guo Y C,et al.Materials Review B:Research Papers,2016,30(5),130(in Chinese).薛翠真,申爱琴,郭寅川,等.材料导报:研究篇,2016,30(5),130.
6 Chen M Z,Lin J T,Wu S P,et al.Construction&Building Materials,2011,25(4),1532.
7 Xiao S Y,Zhu L.Journal of Shenyang Jianzhu University(Natural Science),2016(4),608(in Chinese).肖诗云,朱梁.沈阳建筑大学学报(自然科学版),2016(4),608.
8 Xie C,Wang Q C,Li S,et al.Bulletin of the Chinese Ceramic Society,2015,34(12),3695(in Chinese).谢超,王起才,李盛,等.硅酸盐通报,2015,34(12),3695.
9 Bu J,Tian Z.Sādhanā,2016,41(3),1.
10 Wei J X,Yu Q J,Zeng X X,et al.Journal of South China University of Technology(Natural Science Edition),2007,35(2),121(in Chinese).韦江雄,余其俊,曾小星,等.华南理工大学学报(自然科学版),2007,35(2),121.
11 Ma G J,Guo X Y,Huang W X,et al.Bulletin of the Chinese Ceramic Society,2016(7),2259(in Chinese).马国金,郭秀艳,黄文先,等.硅酸盐通报,2016(7),2259.
12 Das B B,Kondraivendhan B.Construction&Building Materials,2012,28(1),382.
13 Khatib J M,Mangat P S.Cement&Concrete Composites,1999,21(5-6),431.
14 Xue C Z,Shen A Q,Guo Y C,et al.Journal of Jiangsu University(Nature Science Edition),2017,38(3),343(in Chinese).薛翠真,申爱琴,郭寅川,等.江苏大学学报(自然科学版),2017,38(3),343.
15 Bensted J.Structure and properties of cement,Chemical Industry Press,China,2008(in Chinese).本斯迪德.水泥的结构和性能,化学工业出版社,2008.
16 Mehta P K.In:Proceedings of 8th International Congress on the Chemistry of Cement.Rio de Janeiro,1986,pp.113.