• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2023.05a
• /
• pp.137-138
• /
• 2023

This study proposed the optimal mixing time for pre-mixed cement and post mixed cement using the statistical analysis method of box plots. Pre-mixed cement can prevent material seegregation, strength loss, and quality variation if mixed for at least 60 seconds, and the data median is shown to be within the box range. Post-mixed cement should be mixed for at least 180 seconds to prevent material segregation, strength loss, and quality variation, and compressive strength tends to increase with longer vibrating times. Therefore, it is suggested that using pre-mixed cement can shorten the vibrating time and increase the productivity of the concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.797-800
• /
• 2008

The pre-mixed concrete shotcrete, which can pre-bag the shotcrete materials and thus can save considerable labor activity, will be developed through extensive experiments. The proposed pre-mixed High performance Shooting concrete system included hydro-demolition will be verified though field tests in actual repair and rehabilitation construction sites. This research was on developing of the High performance Shooting concrete by evaluation of site application by field test using new automatic Hydro-demolition and Shotcrete equipment.

• 베이커리
• /
• no.6 s.383
• /
• pp.60-61
• /
• 2000

• 베이커리
• /
• no.10 s.351
• /
• pp.161-161
• /
• 1997

• 베이커리
• /
• no.3 s.380
• /
• pp.84-87
• /
• 2000

• 베이커리
• /
• no.11 s.412
• /
• pp.164-165
• /
• 2002

• 베이커리
• /
• no.8 s.361
• /
• pp.112-113
• /
• 1998

• 베이커리
• /
• no.9 s.386
• /
• pp.89-90
• /
• 2000

• 베이커리
• /
• no.11 s.412
• /
• pp.111-113
• /
• 2002

• 베이커리
• /
• no.1 s.390
• /
• pp.112-117
• /
• 2001