关键词: 再生轻骨料混凝土;抗压强度;再生轻骨料取代率;换算关系

Abstract: In order to study cube compressive strength and prism compressive strength of recycled lightweight aggregate concrete, and conversion relationship between the two with the replacement rate of recycled lightweight coarse aggregate as change parameters, 15 standard cube test blocks and 15 standard prism test blocks were produced to carry out the test.Then compressive strength of test blocks were measured, and the regularity of different replacement rate of recycled lightweight coarse aggregate influencing compressive strength of recycled lightweight aggregate concrete was discussed, as the method of statistical regression adopted, the conversion relationship between of axial compressive strength and cube compressive strength of recycled lightweight aggregate concrete was obtained.The results show that compressive strength of recycled lightweight aggregate concrete are lower than compressive strength of ordinary concrete;and that compressive strength of recycled lightweight aggregate concrete gradually decreases as replacement rate of recycled lightweight coarse aggregate increases;as well as, the conversion relationship between axial compressive strength and cube compressive strength of recycled lightweight aggregate concrete is different from ordinary concrete;based on the experimental data, conversion relationship formula between compressive strength indexes of recycled lightweight aggregate concrete was established.

Key words: recycled lightweight aggregate concrete;compressive strength;replacement rate of recycled lightweight aggregate;conversion relationship