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首页> 外文会议>International Seminar on Composite Materials in Concrete Construction; Sep 5-6, 2002; Scotland, UK >PROPERTIES OF CONCRETE INCORPORATING HIGH VOLUMES OF CLASS-F FLY ASH AND STEEL FIBRES
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PROPERTIES OF CONCRETE INCORPORATING HIGH VOLUMES OF CLASS-F FLY ASH AND STEEL FIBRES

机译：掺入大体积F级粉煤灰和钢纤维的混凝土的性能

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摘要

The results of an experimental investigation to study the effects of replacement of cement (by mass) with three percentages of high fly ash content, and the effect of addition of steel fibres on the slump, Vebe time, compressive strength, split tensile strength, flexural strength and impact strength of high fly ash concrete are presented. A control mix of proportions 1:1.4:2.6 with water cement ratio 0.46 and superplasticizer-cementitious ratio of 0.015 was designed. Cement has been replaced by mass with 35,45, and 55% of fly ash content. Three percentages of steel fibres (0.30, 0.60 and 0.90%) of aspect ratio 80 have been used in the investigation. The test results indicate that replacement of cement with fly ash increases the workability (slump and "Vebe time), decreases compressive strength, split tensile strength, flexural strength, and have no significant effect on the impact strength of plain concrete. Addition of steel fibres reduces the workability, does not significantly affect the compressive strength, and increases the split tensile strength and flexural strength, and tremendously enhances the impact strength of high fly ash concrete with an increase in percentages of fibres.
机译：实验研究的结果，研究了以三个百分比的高粉煤灰含量替代水泥（按质量计）的效果，以及添加钢纤维对坍落度，Vebe时间，抗压强度，劈裂抗拉强度，挠曲性的影响介绍了高粉煤灰混凝土的强度和冲击强度。设计了水灰比为0.46，高效减水剂-胶凝比为0.015的比例为1：1.4：2.6的控制混合物。水泥已被35,45和55％的粉煤灰含量所取代。研究中使用了3％的纵横比80的钢纤维（0.30、0.60和0.90％）。试验结果表明，用粉煤灰代替水泥可提高可加工性（坍落度和“ Vebe时间”），降低抗压强度，劈裂抗拉强度，抗弯强度，并且对普通混凝土的冲击强度没有显着影响。降低可使用性，不显着影响抗压强度，增加劈裂抗拉强度和抗弯强度，并通过增加纤维百分比极大地提高高粉煤灰混凝土的抗冲击强度。

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