The findings indicated that the presence of recycled sand reduced the initial fluidity of the mixture and the open time, which can have adverse effects on the properties of concrete intended for printing. Nonetheless, when 1.2 g of sodium gluconate was added to the mixture as a retarder for ...
After initial set, the concrete surface still needs moisture and now there's no bleed water. This is when you really need to cure the concrete. You need to assume that your concrete needs to be cured-it does! You don't want your perfect baby concrete to turn into a juvenile delinquent...
While initial disruptions and challenges were significant, the market showed signs of resilience and even experienced some growth in specific areas. As the pandemic's effects continue to moderate, the long-term outlook for the sprayed concrete market remains positive, driven by its inherent advantages...
1.1 The initial yield surface 1.2. The subsequent yield surface 2. The flow rule 3. The hardening/softening rule The outset of plastic deformation is specified by the initial yield surface, the flow rule specifies the plastic deformation direction, and the development of the yield surface with ...
At the same time, the maximum number of iterations is set to 100, which means that the algorithm will also stop after 100 iterations. The improved artificial bee colony algorithm improves the algorithm in two aspects: optimizing the initial solution space and honey source search mechanism, and ...
The process of using the MNLR model involves several steps: firstly, identifying the variable we want to predict; secondly, creating a nonlinear equation that represents how this variable is affected by other variables; thirdly, inputting initial guesses for the parameters of this equation, with ...
The process of using the MNLR model involves several steps: firstly, identifying the variable we want to predict; secondly, creating a nonlinear equation that represents how this variable is affected by other variables; thirdly, inputting initial guesses for the parameters of this equation, with ...
As the number of heavy vehicles on the road continues to increase, collisions involving heavy vehicles and concrete median barriers (CMB) occur more frequently than in the past. Consequently, there is a growing need for research into more stringent desig
When the water content of the cement-based material specimen gradually decreases to the point where only a single layer of water molecular film is adsorbed on the surface of the hole wall, the initial relaxation time at this time is equal to the surface relaxation time T2s, which can be su...
The initial weight of the specimen was recorded then, the specimen was placed on supports where 1–3 mm from its lower surface could be submerged in water. The weight of the specimen was measured at specific time intervals as shown in Table 6. The specimen should be wiped with a piece ...