| Popis: |
Self-compacting sand concrete (SCSC) can be regarded as a flowing sand concrete, containing as principal ag- gregate natural sand, which can be cast without compaction or vibration. Due to the finesses of aggregates in SCSC, it re- quires a high amount of fine materials than other types of concretes. This paper studies the effect of marble powder con- tent (MP) on the properties of the sand concrete (SCSC) at fresh and hardened states. The properties of the fresh prepared mixes tested are the mini-slump flow, the V-funnel flow time and viscosity. At the hardened state, the parameter which has been determined is the 28-day compressive strength. The obtained test results show that the increase of MP content in SCSC, from 150 kg/m 3 to 350 kg/m 3 , improves the properties at fresh state by decreasing v-funnel flow time (from 5s to 1.5s) and increasing the mini-cone slump (from 28cm to 34cm). With the use of 250 kg/m 3 of MP we can reach the high- est initial viscosity while retaining good fluidity at high rotational speeds, compared to the MP contents of 150 kg/m 3 and 350 kg/m 3 . In other hand, the 28-days compressive strength decreases with an increase of MP content. |
