When the applied load, N, is relatively small, the strains in steel and in concrete maintain a single value.
On the mechanical aspect, the sandwich structure resembling a brick wall coated with a layer of concrete maintains graphene's excellent flexibility and serves as a skeleton to withstand external pressure.
The underlying concrete maintains its original nature but with complete failure of the fire resistant coating after the fire as for the concrete lining with the fire resistant coating.
Remarkably, the resulting concretes maintained their slump flow and could flow through a V-shaped box and the obstacles used to assess the J-ring test, thus satisfying the criterion declared by European Federation of Producers and Applicators of Specialist Products for Structures (EFNARC).
The results indicated that, at 7 days, the concrete combined with OMP had a significantly lower compressive strength than the plain concrete, and maintained that status at day 28.
And in Milan, the Bosco Verticale is a pair of residential towers with 800 trees and thousands of plants on concrete balconies, maintained with recycled water.
The rates of temperature increase and decrease in the concrete were maintained at 10 and −10 °C/h, respectively, to prevent undesirable porosity or cracking (AASHTO 2004; Alexanderson 1972; CSA-A23.4-09 2014).
The workability provided by the low water-to-cement ratio of the concrete is maintained by the addition of a high-performance water reducing agent, a polycarboxylate superplasticizer with a density of 1060 kg/m3.
This study investigates the bonding forces between different types of dowel bar and concrete and explores a new type of dowel bar that would provide a sufficient separation between dowel bar and concrete while maintaining an acceptable level of load transfer efficiency.
Immobilization has been reported to be an efficient approach for bacteria-based self-healing concrete to maintain the high-efficiency mineral-forming capacity of incorporated bacteria over a period of time.
