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骨料裹浆厚度对混凝土流变性能的影响
作者:焦登武1 安晓鹏2 史才军1 2  豫2  晃1 何富强3 
单位:1. 湖南大学土木工程学院 长沙 410082 2. 中国建筑材料科学研究总院绿色建筑材料国家重点实验室 北京 100024 3. 厦门理工学院土木工程与建筑系 福建 厦门 361024 
关键词:Bingham模型 骨料裹浆厚度 流变性能 组成设计 混凝土 
分类号:TQ172
出版年,卷(期):页码:2017,45(9):0-0
DOI:
摘要:

 基于Bingham模型,测试了不同骨料裹浆厚度时新拌混凝土的流变参数,探究了骨料裹浆厚度对新拌混凝土流变性能的影响。结果表明,改变骨料裹浆厚度能够明显影响新拌混凝土的流变性能。在保持骨料基本参数不变时,随着骨料裹浆厚度的增加,混凝土的屈服应力、塑性黏度和静态屈服应力基本呈降低趋势,坍落度逐渐升高,混凝土的流动性得到改善;当在特定水灰比、骨料裹浆厚度相对较高时,拌合物的坍落度较高,且存在轻微离析现象。通过建立流变参数随骨料裹浆厚度的变化曲线,能够确定混凝土中的最佳胶凝材料用量,进而指导混凝土的组成设计。

 
基金项目:
国家国际科技合作专项(2015DFA50880);国家自然科学基金(U1305243,51502279)。
作者简介:
焦登武(1992—),男,博士研究生。
参考文献:

 [1]Denis A, Attar A, Breysse D, et al. Effect of coarse aggregate on the workability of sandcrete[J]. Cem Concr Res, 2002, 32: 701–706.

[2]Kwan A K H, Li L G. Combined effects of water film, paste film and mortar film thicknesses on fresh properties of concrete[J]. Constr Build Mater, 2014, 50: 598–608.
[3]Mihashi H, Ishikawa N. Quantification of fresh and mechanical properties of HFRCC by excess paste thickness[J]. High Perform Fiber Reinf Cem Compos, 2012: 67–74.
[4]Sun K, Zhou X, Gong C, et al. Influence of paste thickness on coated aggregates on properties of high-density sulphoaluminate cement concrete[J]. Constr Build Mater, 2016, 115: 125–131.
[5]Torres A, Hu J, Ramos A. The effect of the cementitious paste thickness on the performance of pervious concrete[J]. Constr Build Mater, 2015, 95: 850–859.
[6]Reinhardt H W, Wüstholz T. About the influence of the content and composition of the aggregates on the rheological behaviour of self-compacting concrete[J]. Mater Struct, 2007, 39(7): 683–693.
[7]赵洪, 杨永民, 李方贤, 等. 骨料包裹层厚度的研究及其对多孔混凝土性能的影响[J]. 混凝土, 2014(02): 29–32.
Zhao H, Yang Y, Li F, et al. Concrete (in Chinese), 2014(02): 29–32.
[8]张建智, 蔡志达, 李隆盛, 等. 骨料裹浆厚度对混凝土性质影响之研究[J]. 建筑材料学报. 2009, 12(4): 384–389.
Zhang J, Cai Z, Li L, et al. J Build Mater (in Chinese), 2009(04): 
384–389.
[9]王海娜. 自密实混凝土的骨料比表面法配合比设计及其基本性能研究[D]. 浙江: 浙江大学, 2007.
Wang H. Researching the mix design of self-compacting concrete based on special surface area method of aggregates and testing its basic performance (in Chinese, dissertation). Zhejiang: Zhejiang University (in Chinese), 2007.
[10]Koehler E P, Fowler D W. Development of a portable rheometer for fresh portland cement concrete[J]. ICAR Rep, 2004: 103–105.
[11]Tasi C T, Hwang C L, Li L S. The effect of aggregate gradation on engineering properties of high performance concrete[J]. J ASTM Int, 2005, 3(3): 1–12.
[12]Zerbino R, Barragán B, Garcia T, et al. Workability tests and rheological parameters in self-compacting concrete[J]. Mater Struct, 2009, 42(7): 947–960.
[13]Kovler K, Roussel N. Properties of fresh and hardened concrete[J]. Cem Concr Res, 2011, 41(7): 775–792.
[14]Koehler E P, Fowler D W, Ferraris C F, et al. A new, portable rheometer for fresh self-consolidating concrete[J]. ACI Spec Publ, 2005, 233(7): 97–115.
[15]Wallevik J E. Relationship between the Bingham parameters and slump[J]. Cem Concr Res, 2006, 36(7): 1214–1221.
[16]Tanigawa Y, Mori H. Analytical study on deformation of fresh concrete[J]. J Eng Mech, 1989, 115(3): 493–508.
[17]Tanigawa Y, Mori H, Watanabe K. Computer simulation of consistency and rheology tests of fresh concrete by viscoplastic finite element method[A]//Proceeding of RILEM Colloquium: Properties of concrete[C]. 1990: 301–308.
[18]Kwan A K H, Li L G. Combined effects of water film, paste film and mortar film thicknesses on fresh properties of concrete[J]. Constr Build Mater, 2014, 50: 598–608.
[19]Koehler E P, Fowler D W. Development and use of a portable rheometer for concrete[A]//Supplementary Proceedings of the Eighth CANMET/ACI International Conference on Recent Advances in Concrete Technology[C]. Montreal, Canada, 2006: 53–72.
[20]Lowke D, Kränkel T, Gehlen C, et al. Effect of cement on superplasticizer adsorption, yield stress, thixotropy and segregation resistance[A]//KHAYAT K, FEYS D eds. Design, Production and Placement of Self-consolidating Concrete[C]. Dordrecht, 2010: 91–101.
[21]Roussel N, Cussigh F. Distinct-layer casting of SCC: The mechanical consequences of thixotropy[J]. Cem Concr Res, 2008, 38(5): 624–632.
[22]Feys D, Khayat K H, Khatib R. How do concrete rheology, tribology, flow rate and pipe radius influence pumping pressure?[J]. Cem Concr Compos, 2016, 66: 38–46.
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