Abstract
In the last decades concrete technology has made it easier to reach early strength, Rapid Hardened Concrete is one of the construction concretes used widely. The use of rapid hardened concrete is increased due to the possibility to limit the construction time. The purpose of this paper is to investigate the mechanical properties of Rapid Hardened Concrete (RHC). Properties studied include compressive strength, tensile strength, and flexural behavior. Mechanical properties were evaluated based on the compressive, tensile, and bend test results for both normal and rapid hardened concrete. The effect of admixture percentages (Sikament-nn) on hardening properties of rapid concrete was studied. The experimental investigation indicated that the flexural and compressive strength of concrete increased with the addition of Sikament-nn at the age of 1, 3, 7, and 28 days and the optimal percentage of Sikament-nn was 2%. In addition, test results show that rapid hardened concrete exhibit ductile failure and significant displacement before failure. The ultimate displacement of rapid hardened concrete was an increase more 50% than control RC beams.
Highlights
The fundamental understanding of the behaviour of rapid hardening concrete is essential to ensure safety during construction, as well as adequate durability and long-term properties
Accelerated construction schedules aiming at economic gains have led to tragic failures during construction due to the inadequate knowledge of the rapid hardening concrete behavior [1]
The rapid hardening concrete is characterised by two main processes: setting and hardening
Summary
The fundamental understanding of the behaviour of rapid hardening concrete is essential to ensure safety during construction, as well as adequate durability and long-term properties. Accelerated construction schedules aiming at economic gains have led to tragic failures during construction due to the inadequate knowledge of the rapid hardening concrete behavior [1]. Many researchers investigated the rapid hardening concrete [2,3,4,5,6,7-8]. The rapid hardening concrete is characterised by two main processes: setting (progressive loss of fluidity) and hardening (gaining strength). The coupling between thermal and mechanical characteristics of RHC is more critical compared to that in mature concrete. Many papers presented the results of mechanical behavior of rapid hardening concrete. Little information is available on ultimate deformation capability
Sign-in/Register to view highlights & summary 
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call