Early strength agents can increase the speed of early strength development, reduce the time required for proper curing and protection, and speed up the start of finishing operations, which are particularly useful for improving the performance of concrete in cold weather. The main function of the ...
) 3 to 30 parts by weight of at least one of the inorganic accelerator and the initial mechanical strength and (d) 0 to 10 parts by weight of at least one gas of organic.these compositions can be used as additives for concrete, in particular as accelerators of concrete in cold weather....
For example, when the stripping time is prolonged during the cold weather conditions the concrete surface might appear darker. Keep in mind that in hot weather conditions the formwork panels could warm up significantly. This could lead to quick drying of the concrete during pouring. After ...
One of the reasons was that the strength development at the backfill construction site might be affected by the cold weather on site. A flow value of 200 ± 10 mm and a bleeding rate of less than 5% was obtained on site, which meets the target values stated in the Japanese ...
Curing: As concrete cures, a chemical reaction takes place called hydration. If water disappears too rapidly via evaporation (in hot temperatures) or freezes when exposed to cold weather, the ultimate strength of the concrete will suffer. In hot weather, the contractor either mists the freshly pl...
Because the pour occurred in cold weather, the design included a specification for re-bar temperature as well as other details. At least thirty truckloads of concrete were delivered to this job, timed to arrange continuously to permit a continuous pour. Thanks to Brendan Clemente, Bonded Concret...
Easy repairs:Over time or after severe weather events, pavers may shift or become uneven. If you must replace or reset pavers, remove the damaged or uneven paver, level the sand or dirt beneath and insert a new paver. The ease of repair also keeps maintenance costs of concrete pavers extre...
The use of concrete retarders can mitigate the dangers of long-distance delivery in hot weather by offsetting the hastening effect of high temperature on the initial setting time. Concrete retarder is used to delay the hardening of concrete between pours and prevent the formation of cold joints ...
weather data from selected weather stations in Perugia to understand the urban heat island (UHI). As a result of this investigation, the authors state that their future work will be centered on creating weather files that consider the impact of the appearance of heatwaves and cold waves, UHI,...
Such findings also show that the products with EG beads, a hydraulic inorganic binder, and additives are non-flammable, waterproof, weather-resistant, and durable [13]. Another filler suitable as a LWA is polystyrene foam beads or crushed polystyrene foam waste (CEPW) [14,15]. Currently, ...