Kajian dan Evaluasi Struktur Slab Prestressed Precast Modular Concrete
Penulis/Author
I GUSTI LANANG BAGUS ERATODI, ST., MT. (1); Ir. Ali Awaludin, S.T., M.Eng., Ph.D., IPU., ACPE. (2); Ay Lie Han (3); Dr.Ing. Ir. Andreas Triwiyono, IPU. (4)
Tanggal/Date
2020
Kata Kunci/Keyword
Abstrak/Abstract
Abstract
Prestressed precast modular concrete slabs function rigid pavement, supporting vehicle loads above it on
subgrade with relatively low bearing capacity. This slab measures 2000 x 850 x 150 mm3 of regular
reinforced concrete (old production) or prestressed concrete (new production) quality K-500. After several
times of use, damage occurs mainly at the end of the slab in the form of spalling. The objectives of the study
and evaluation were: (1) observing damage; (2) material quality data; (3) numerical modeling by taking into
account material properties, loading and soil conditions; and (4) providing slab design recommendations
including materials and geometrics. The method of study and evaluation of slab damage was done by
observing the damage, taking concrete core-case and testing it in the laboratory, and modeling the slab
structure with various parameters (soil data, concrete quality and slab geometry). Field observations and
analysis results show that concrete slab spalling occurs initially at the edge (850 mm wide) which in turn
causes the effectiveness of the pre-tension force to be suboptimal and finally the concrete spalling volume
increases. Apart from the frequency of collisions during installation and slab deformation when supporting
vehicle loads. Concrete spalling problems also due to inappropriate concrete quality.
Keywords: Prestressed slab, spalling, precast, modular, core-case
