关于 OPC 和 PCC 对混凝土性能影响的研究

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引用次数: 0

摘要

研究的目的是评估 OPC 和 PCC 对混凝土抗压和抗拉强度随龄期变化的影响。因此,使用水泥 OPC 和 PCC 制备了圆柱形试样。在浇注试样时,只使用碎砖作为粗骨料,锡尔赫特砂(FM=2.65)作为细骨料。采用了两种不同的水灰比 0.45 和 0.60,以及 1:1.5:3 和 1:2:4(体积比)的混合比。使用 OPC 制作的混凝土筒在 28 天时的抗压和抗拉强度高于使用 PCC 制作的混凝土筒。然而,在混凝土达到一定龄期后,使用 OPC 的混凝土在 45 天时的抗压强度增长速度更快。而使用 PCC 的混凝土在较长的龄期内会获得较大的强度。本研究发现,在 45 天以内,OPC 混凝土的抗压强度大于 PCC 混凝土。然而,60 天后观察到的抗压强度大于 OPC 混凝土。在抗拉强度方面也观察到类似的趋势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the Effect of OPC and PCC on the Properties of Concrete
The objective of the study was to evaluate the effect of OPC and PCC on the compressive and tensile strength of concrete with age. Accordingly, cylindrical specimen was prepared by using cement OPC and PCC. Incasting the specimen only crushed bricks are used as coarse aggregate and Sylhet sand (FM=2.65) has been used as fine aggregate. Two different water cement ratios is 0.45, 0.60 and mix ratio 1:1.5:3 and 1:2:4 (by volume) has been adopted. Concrete cylinder made with OPC show higher compressive and tensile strength at 28 days then the those made with PCC. However, it has been from that Concrete made with OPC gains compressive strength at (45 days) a faster rate up to a certain age of concrete. While concrete with PCC attains larger strength at later age. In this study, it has been found that up to 45 days, the attained compressive strength of OPC concrete is larger than PCC concrete. However, the observed compressive strength beyond 60days is larger than OPC concrete. Similar trend has been observed in the case of tensile strength.
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