基于最紧密堆积理论合理选择UHPC的减水剂掺量
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摘要
研究了减水剂掺量对超高性能混凝土的湿堆积密实度、工作性能以及强度的影响,进而得到减水剂掺量的最优选择区间。试验结果表明,超高性能混凝土强度最高时的减水剂掺量为3%,工作性能最优时的减水剂掺量为4%,因此,减水剂掺量的最优选择区间为3%～4%。减水剂掺量的合理选择不仅能够降低能源消耗和成本,也对制备更高性能的超高性能混凝土具有重要意义。
The effect of the dosage of superplasticizer on the wet packing density,working performance and strength of UHPC was studied,and the optimum selection interval of the dosage of superplasticizer was obtained. The test results show that UHPC generate the highest strength when the dosage of superplasticizer is 3%. When the dosage of superplasticizer increases to 4%,the working performance is optimal. The results indicate that,the optimum selection interval of the dosage of superplasticizer is 3%-4%. Reasonable selection of dosage of superplasticizer can not only reduce energy consumption and cost,but also have important significance for preparing ultra-high performance concrete with advanced properties.
The effect of the dosage of superplasticizer on the wet packing density,working performance and strength of UHPC was studied,and the optimum selection interval of the dosage of superplasticizer was obtained. The test results show that UHPC generate the highest strength when the dosage of superplasticizer is 3%. When the dosage of superplasticizer increases to 4%,the working performance is optimal. The results indicate that,the optimum selection interval of the dosage of superplasticizer is 3%-4%. Reasonable selection of dosage of superplasticizer can not only reduce energy consumption and cost,but also have important significance for preparing ultra-high performance concrete with advanced properties.
引文
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[23]黄雪红,郑木霞,林埔,等.聚羧酸共聚物侧链结构对水泥水化及硬化过程的影响[J].分子科学学报,2007,23(2):123-128.
[24]陈建奎.混凝土外加剂原理与应用[M].第2版.北京:中国计划出版社,2004.
[25]翁荔丹,黄雪红.聚羧酸减水剂对水泥水化过程的影响[J].福建师范大学学报(自然科学版),2007,23(1):54-57.
[26]马双平,周芬,朱华雄.减水剂表面活性及作用机理[J].商品混凝土,2014(6):34-36.
[2]黄伟.矿物掺合料对超高性能混凝土的水化及微结构形成的影响[D].南京:东南大学,2017.
[3]Shi C,Wu Z,Xiao J,et al.A review on ultra high performance concrete:Part I.Raw materials and mixture design[J].Construction&Building Materials,2015,101:741-751.
[4]Yu R,Spiesz P,Brouwers H J H.Development of an eco-friendly ultra-high performance concrete(UHPC)with efficient cement and mineral admixtures uses[J].Cement&Concrete Composites,2015,55(1):383-394.
[5]Yamada K.Basics of analytical methods used for the investigation of interaction mechanism between cements and superplasticizers[J].Cement&Concrete Research,2011,41(7):793-798.
[6]Ran Q P,Ponisseril S,Miao C W,et al.Adsorption mechanism of comb polymer dispersants at the cement/water interface[J].Journal of Dispersion Science&Technology,2010,31(6):790-798.
[7]Uchikawa H,Hanehara S,Sawaki D.The role of steric repulsive force in the dispersion of cement particles in fresh paste prepared with organic admixture[J].Cement&Concrete Research,1997,27(1):37-50.
[8]Zingg A,Winnefeld F,Holzer L,et al.Interaction of polycarboxylate-based superplasticizers with cements containing different C3A amounts[J].Cement&Concrete Composites,2009,31(3):153-162.
[9]李崇智,冯乃谦,李永德.聚羧酸类高性能减水剂的研究进展[J].绿色建筑,2001,17(6):38-41.
[10]Kim H,Koh T,Pyo S.Enhancing flowability and sustainability of ultra high performance concrete incorporating high replacement levels of industrial slags[J].Construction&Building Materials,2016,123:153-160.
[11]Pyo S,Kim H K.Fresh and hardened properties of ultra-high performance concrete incorporating coal bottom ash and slag powder[J].Construction&Building Materials,2017,131:459-466.
[12]Soliman N A,Tagnit-Hamou A.Development of ultra-high-performance concrete using glass powder-towards ecofriendly concrete[J].Construction&Building Materials,2016,125:600-612.
[13]Schr9fl C,Gruber M,Plank J.Preferential adsorption of polycarboxylate superplasticizers on cement and silica fume in ultra-high performance concrete(UHPC)[J].Cement&Concrete Research,2012,42(11):1401-1408.
[14]Sedran F D L.Optimization of ultra-high-performance concrete by the use of a packing model[J].Cement&Concrete Research,1994,24(6):997-1009.
[15]Hassan A M T,Jones S W,Mahmud G H.Experimental test methods to determine the uniaxial tensile and compressive behaviour of ultra high performance fibre reinforced concrete(UHPFRC)[J].Construction&Building Materials,2012,37(12):874-882.
[16]Flatt R J,Houst Y F.A simplified view on chemical effects perturbing the action of superplasticizers[J].Cement&Concrete Research,2001,31(8):1169-1176.
[17]Yoshioka K,Tazawa E I,Kawai K,et al.Adsorption characteristics of superplasticizers on cement component minerals[J].Cement&Concrete Research,2002,32(10):1507-1513.
[18]Uchikawa H,Hanehara S,Sawaki D.The role of steric repulsive force in the dispersion of cement particles in fresh paste prepared with organic admixture[J].Cement&Concrete Research,1997,27(1):37-50.
[19]Zingg A,Winnefeld F,Holzer L,et al.Interaction of polycarboxylate-based superplasticizers with cements containing different CA amounts[J].Cement&Concrete Composites,2009,31(3):153-162.
[20]张绍年.聚羧酸减水剂在混凝土中的应用及作用机理研究[J].建筑技术开发,2007,34(6):68-69.
[21]袁泽洋,伍勇华,南峰,等.聚羧酸系和萘系高效减水剂复合使用对混凝土蒸养强度的影响[J].混凝土与水泥制品,2012(11):18-21.
[22]王孙睿.不同减水剂掺量对水泥体系流动收缩性及强度的影响研究[J].福建建材,2016(7):22-24.
[23]黄雪红,郑木霞,林埔,等.聚羧酸共聚物侧链结构对水泥水化及硬化过程的影响[J].分子科学学报,2007,23(2):123-128.
[24]陈建奎.混凝土外加剂原理与应用[M].第2版.北京:中国计划出版社,2004.
[25]翁荔丹,黄雪红.聚羧酸减水剂对水泥水化过程的影响[J].福建师范大学学报(自然科学版),2007,23(1):54-57.
[26]马双平,周芬,朱华雄.减水剂表面活性及作用机理[J].商品混凝土,2014(6):34-36.