Effect of Cement Content, Fibers, Chemical Admixtures and Aggregate Shape on Rheological Parameters of Pumping Concrete

Cengiz OEzel; Kemal T. Yuecel

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Effect of Cement Content, Fibers, Chemical Admixtures and Aggregate Shape on Rheological Parameters of Pumping Concrete

机译：水泥含量，纤维，化学外加剂和骨料形状对泵送混凝土流变参数的影响

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摘要

The transport of fresh concrete by pumping is an important process and widely used in practical concrete technology. This process has been applied since the beginning of the twentieth century. More recent developments of pumping equipment and findings on mineral and chemical admixtures have prompted more sophisticated research on pumping concretes. While they do not elaborate upon standard specifications, many recommendations for the composition of pumping concretes which are very useful in applications, such as AGI-304.2R reports, are available. This paper reports the results of an experimental study into the effects of concrete components, namely cement content, aggregate type, mineral, fiber, and plasticizer admixtures, on the rheology of pumping concretes. The rheological properties of concretes are examined by the Two Point Workability Test Apparatus (CTPT) originally proposed by G. H. Tattersall. The present study shows that concrete workability is improved by increasing cement content and also shows that the aggregate type only effects the rheological parameters in low cement content mixtures. In addition, yield stress and plastic viscosity are generally lower in concrete mixtures that contain natural stone rather than crushed aggregates. In addition, this study shows that the effect of mineral, plasticizer and fiber admixtures depends on cement content and admixture type.

机译：泵送新鲜混凝土是一个重要的过程，在实际混凝土技术中得到了广泛的应用。此过程自20世纪初开始应用。泵送设备的最新发展以及矿物和化学外加剂的发现促使人们对泵送混凝土进行了更为复杂的研究。尽管它们没有详细说明标准规格，但是对于泵送混凝土的成分，有许多建议在应用中非常有用，例如AGI-304.2R报告。本文报告了对混凝土成分（即水泥含量，集料类型，矿物，纤维和增塑剂混合物）对泵送混凝土流变性的影响进行实验研究的结果。混凝土的流变性能由最初由G.H. Tattersall提出的两点可加工性测试设备（CTPT）进行了检查。本研究表明，通过增加水泥含量可以改善混凝土的可加工性，并且还表明骨料类型仅影响低水泥含量混合物的流变参数。此外，在含有天然石材而不是碎骨料的混凝土混合物中，屈服应力和塑性粘度通常较低。此外，这项研究表明，矿物，增塑剂和纤维混合物的效果取决于水泥含量和混合物类型。

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来源
《Arabian Journal for Science and Engineering》 |2013年第5期|1059-1074|共16页
作者
Cengiz OEzel; Kemal T. Yuecel;
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作者单位

Construction Education Department, Faculty of Technical Education, Suleyman Demirel University, Isparta, Turkey;

Civil Engineering Department, Faculty of Engineering and Architectural, Suleyman Demirel University, Isparta, Turkey;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Rheological properties; Fresh concrete; Pump ability; Concrete admixtures;

机译：流变性能;新鲜混凝土;抽水能力;混凝土外加剂;

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机译：化学外加剂对轻质骨料混凝土流变参数和稳定性的影响
2. Reduction in cement content of normal strength concrete with used engine oil (UEO) as chemical admixture [J] . Yaphary Yohannes L., Lam Raymond Hw, Lau Denvid Construction and Building Materials . 2020,第Nova20期

机译：用二手发动机油（UEO）作为化学加值的正常强度混凝土的水泥含量
3. Parameter-study on the influence of steel fibers and coarse aggregate content on the fresh properties of self-compacting concrete [J] . Steffen Grunewald, Joost C. Walraven Cement and Concrete Research . 2001,第12期

机译：钢纤维和粗骨料含量对自密实混凝土新鲜性能影响的参数研究
4. A Study on properties of Concrete with Admixture as A Part of Cement or Fine Aggregate Part 1 Influence of admixture on compressive strength and drying shrinkage [C] . Zihao Liu, Koji Takasu, Hidehiro Koyamada, 日本建築学会;日本建築学会大会 . -1

机译：掺合料作为水泥或细集料的混凝土的性能研究第1部分掺合料对抗压强度和干缩性能的影响。
5. Thermal desorption/pyrolysis gas chromatography-mass spectrometry of Portland cement and concrete for the determination of grinding aids and chemical admixtures. [D] . Jeknavorian, Ara Avedis. 1999

机译：硅酸盐水泥和混凝土的热解吸/热解气相色谱-质谱法，用于测定助磨剂和化学外加剂。
6. Mechanical Properties of Chopped Basalt Fiber-Reinforced Lightweight Aggregate Concrete and Chopped Polyacrylonitrile Fiber Reinforced Lightweight Aggregate Concrete [O] . Yusheng Zeng, Xianyu Zhou, Aiping Tang, 2020

机译：切碎的玄武岩纤维增强轻质骨料混凝土的力学性能和切碎的聚丙烯腈纤维增强的轻质骨料混凝土的力学性能
7. Stone Matrix Asphalt (SMA) is a gap-graded mix that is gaining popularity worldwide. Generally, gap graded mixes are thought to be weak in fatigue resistance. In this study, cellulose fibers were pre-blended in PG64-22 binder with fiber proportions of 0.2%, 0.4%, 0.6%, 0.8% and 1.0% by weight of aggregates. The fiber-modified binder showed improved rheological properties and showed that the PG64-22 binder can be modified and raised to PG70-22 grade. The cellulose oil palm fiber (COPF) was found to improve the diameteral fatigue performance of SMA design mix. The fatigue life increased to a maximum at a fiber content of about 0.6%, whilst the tensile stress and stiffness also showed a similar trend in performance. The initial strains of the mix were lowest at a fiber content of 0.6%. [O] . Ratnasamy Muniandy, Bujang B.K. Huat 2006

机译：石基沥青（SMA）是一种间隙分级的混合物，在全球范围内越来越受欢迎。通常，间隙梯度混合料被认为抗疲劳性较弱。在这项研究中，将纤维素纤维预先掺入PG64-22粘合剂中，纤维比例为集料重量的0.2％，0.4％，0.6％，0.8％和1.0％。纤维改性的粘合剂表现出改善的流变性能，并表明PG64-22粘合剂可以被改性并提高到PG70-22级。发现纤维素油棕纤维（COPF）可以改善SMA设计混合物的直径疲劳性能。在约0.6％的纤维含量下，疲劳寿命增加到最大值，而拉伸应力和刚度也表现出相似的性能趋势。混合物的初始应变在纤维含量为0.6％时最低。
8. Effect of High Doses of Chemical Admixtures on the Freeze-Thaw Durability of Portland Cement Concrete. [R] . Korhonen, C. 2002

机译：高剂量化学外加剂对硅酸盐水泥混凝土冻融耐久性的影响。

Effect of Cement Content, Fibers, Chemical Admixtures and Aggregate Shape on Rheological Parameters of Pumping Concrete

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