Title:
Strength Properties of Concrete Made with Granular Material
Author(s):
R. Sakurada, K. Terui, M. Miyamoto, A. Ferrari, N. Sasaki, and A. Ishii
Publication:
Materials Journal
Volume:
116
Issue:
1
Appears on pages(s):
147-153
Keywords:
fracture energy; PVA fibers; recycled aggregate; remaining concrete; returned concrete; shear performance; tensile strength
DOI:
10.14359/51712241
Date:
1/1/2019
Abstract:
This paper attempts to manufacture a kind of recycled aggregate by transforming remaining concrete at fresh state into a granular material (GM) in a field test, and reports on the strength characteristics of concrete made with GM. The GM contains fine aggregate (≤ 5 mm [0.20 in.]) and coarse aggregate (5 to 20 mm [0.20 to 0.79 in.]). The fresh ready mixed concrete was used in this field test in substitution of the remaining concrete that was trucking back from the construction site to a concrete mixing plant. The 28-day compressive strength of concrete made with GM can be achieved exceeding 30 MPa (4350 psi), which is the desirable strength for nonstructural concrete. The reinforcement with 1.5% polyvinyl alcohol (PVA) fibers enhanced the splitting tensile and flexural strengths of concrete made with GM by 35% and 21% as compared with the GM concrete without PVA fibers, respectively. The peak load at diagonal shear crack of reinforced concrete (RC) beam without stirrups, made with GM and 1.0% PVA fibers, is 29% higher than that of the control reinforced concrete beam without fibers.