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首页> 外文期刊>Journal of Civil, Construction and Environmental Engineering >The Effect of Cement Type and the Atmospheric Steam Curing Cycles on the Properties of Variable Types of Self-Compacting Lightweight Concrete
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The Effect of Cement Type and the Atmospheric Steam Curing Cycles on the Properties of Variable Types of Self-Compacting Lightweight Concrete

机译：水泥类型和大气蒸汽养护周期对可变型自密实轻质混凝土性能的影响

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With the steam curing technology, effective fast curing technique in prefabrication technology, the effect of atmospheric steam curing on the mechanical properties of variable types of self-compacting lightweight concretes and the combination of the properties of semi-lightweight self-compacting concrete are important engineering approaches, focused in this study, in terms of workable and lightweight concrete production that is easy to apply. The cement type (CEM I 42.5 and CEM II 32.5) and three types of aggregates (normal, pumice and raw perlite) were the parameters of the study, including three types of steam curing cycle. The manufactured concrete samples were not only tested for compressive strength and bending, but also for splitting tensile strength. The fresh and hardened unit weight, dimension check and ultrasonic pulse velocity observations were also obtained for all 108 concrete samples. The three steam curing cycles were about 36.5 hours for 65°C, 70°C and 75°C. These steam-curing cycles were designed according to predesign tests and literature. As a result, the cement type and aggregate effect on the steam curing regimes were obtained. The decrease in the compressive strength of lightweight pumice concretes by the curing temperature rise and the negative effects of CEM II 32.5 on the strength values were the other striking results of the tests.
机译：借助蒸汽养护技术，预制技术中有效的快速养护技术，大气蒸汽养护对多种类型的自密实轻质混凝土的力学性能的影响以及半轻质自密实混凝土的性能组合是重要的工程在本研究中重点研究的是易于使用的轻质混凝土的生产方法。水泥类型（CEM I 42.5和CEM II 32.5）和三种集料（普通，浮石和原始珍珠岩）是研究的参数，包括三种类型的蒸汽养护周期。所制造的混凝土样品不仅进行了抗压强度和弯曲测试，而且还测试了抗拉强度。还对所有108个混凝土样品进行了新鲜和硬化后的单位重量，尺寸检查以及超声脉冲速度观察。对于65℃，70℃和75℃，三个蒸汽固化周期为约36.5小时。这些蒸汽固化循环是根据预先设计的测试和文献设计的。结果，获得了水泥类型和骨料对蒸汽养护方式的影响。固化温度的升高使轻质浮石混凝土的抗压强度降低，以及CEM II 32.5对强度值的负面影响是该试验的另一个显着结果。

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