Abstract Recently, it has been difficult to get natural sand for concrete due to an insufficient supply in Korea. Crushed sand was thought as a substitute and previous research has been focused on low fluidity and normal compressive strength (24–30?MPa). Study on high performance concrete using crushed sand is hardly found in Korea. In this study it was investigated that the effect of the crushed sand on fluidity and compressive strength properties of high performance concrete. Blending crushed sand (FM: 3.98) produced in Namyangju, Kyunggido and sea sand (FM: 2.80) produced in Asan bay in Chungnam. The final FMs of fine aggregate were 3.50, 3.23, and 3.08. W/B was set as 0.25 to get high performance. With the test results an analysis of relationship was performed using a statistical program. It was shown that strength property of concrete using crushed aggregate at the very early age or after specific time was mainly affected by strength development properties of binders instead of the crushed sand.
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机译：摘要最近，由于韩国供应不足，很难获得用于混凝土的天然砂。碎砂被认为是一种替代品，以前的研究集中在低流动性和正常抗压强度（24-30MPa）上。在韩国，几乎没有研究过使用碎砂的高性能混凝土。在这项研究中，研究了碎砂对高性能混凝土流动性和抗压强度性能的影响。将南阳州，京畿道生产的碎砂（FM：3.98）与忠南的牙山湾生产的海砂（FM：2.80）混合。细骨料的最终FM为3.50、3.23和3.08。 W / B设置为0.25以获取高性能。对于测试结果，使用统计程序进行关系分析。结果表明，使用碎骨料的混凝土在很早的龄期或特定时间后的强度性能主要受粘结剂而不是碎砂的强度发展性能的影响。
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