ADMIXTURES FOR ULTRA-HIGH STRENGTH (UHS) SELF-CONSOLIDATING CONCRETE (SCC)

机译：超高强度（UHS）自固结混凝土（SCC）的添加剂

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While the early development of polycarboxylate ethers (PCE) was driven by a general need for higher concrete strength, the latest admixture technology has pushed the limits for ultra high strength concrete (UHSC) to new heights. Triggered by very high land prices in big cities,architects strive to maximize usable space, reducing concrete column diameters and enlarging concrete beam spans to create spacious interiors. Such desire requires highly workable, ultra high strength concrete. Recent applications reach compressive strengths of up to 150 MPa and more. Apart from the very low water/binder ratio of such concrete and the resulting need for extremely strong water reducing performance, admixtures specialized for this application need to address additional problems of UHSC when made as SCC, such as pump ability, concrete thixotropy, and shrinkage. This paper will discuss the performance of new admixtures developed to address these problems encountered when producing and placing UHS-SCC.

机译：尽管人们对更高混凝土强度的普遍需求推动了聚羧酸醚（PCE）的早期发展，但最新的掺合料技术将超高强度混凝土（UHSC）的极限推到了新的高度。在大城市，土地价格高昂的触发下，建筑师们努力使可用空间最大化，减小混凝土柱的直径并扩大混凝土梁的跨度，以创造宽敞的内部空间。这种愿望需要高度可加工的超高强度混凝土。最近的应用达到了高达150 MPa的抗压强度。除了这种混凝土的水/粘合剂比例非常低，以及由此产生的极强减水性能的需求外，专用于此应用的外加剂在制备SCC时还需要解决UHSC的其他问题，例如泵送能力，混凝土触变性和收缩性。本文将讨论为解决在生产和放置UHS-SCC时遇到的这些问题而开发的新型外加剂的性能。

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《第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China)》|2009年|194-200|共7页
会议地点 Beijing(CN)
作者
Dr.Jan Kiuegge; Akira Ohta; Sven Asmus;
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BASF Construction Chemicals Asia Pacific, Shanghai, China;

BASF Construction Chemicals Asia Pacific, Chigasaki, Japan;

BASF Construction Chemicals Asia Pacific, Shanghai, China;

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正文语种 eng
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1. Performance of Reinforced Concrete Columns Using Ultra-High-Strength Fiber-Reinforced Self-Compacted Concrete (UHS-FRSCC) [J] . Amr Salah El-Dieb MOJ Civil Engineering . 2016,第2期

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4. ADMIXTURES FOR ULTRA-HIGH STRENGTH (UHS) SELF-CONSOLIDATING CONCRETE (SCC) [C] . International symposium on design,performance and use of self-consolidating concrete . 2009

机译：超高强度（UHS）的混凝土（SCC）的混合物
5. Effect of various chemical admixtures and binder combinations on workability of high-performance, self-consolidating concrete used in repair (French text). [D] . Mayen, Daniel. 2005

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6. Modeling of Compressive Strength for Self-Consolidating High-Strength Concrete Incorporating Palm Oil Fuel Ash [O] . Md. Safiuddin, Sudharshan N. Raman, Md. Abdus Salam, 2016

机译：含棕榈油燃料灰的自固结高强混凝土抗压强度建模
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. Self-Consolidating Concrete (SCC) and High-Volume Fly Ash Concrete (HVFAC) for Infrastructure Elements: Implementation. Report B, Shear Behavior of High-Strength Self-Consolidating Concrete in NU Bridge Girders. [R] . Myers, J. J., Hernandez, E. S., Alghazali, H., 2016

机译：用于基础设施元素的自固结混凝土（sCC）和大体积粉煤灰混凝土（HVFaC）：实施。报告B，NU桥梁中高强度自密实混凝土的剪切性能。

ADMIXTURES FOR ULTRA-HIGH STRENGTH (UHS) SELF-CONSOLIDATING CONCRETE (SCC)

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