The following figure from the above paper shows Trends (in degrees Celsius per 100 years) for each 5 by 5 latitude-longitude grid box using only nonurban stations for annual maximum temperature, annual minimum temperature, and diurnal temperature range for the period 1950 to 1993.
Concrete continues to gain strength after pouring for as long as it retains moisture, but the longer it moist-cures, the slower the rate of strength gain. Moist-curing concrete for 20 days more than doubles its strength compared with four days of moist-curing, which is considered a minimum.oncrete continues to gain strength after pouring for as long as it retains moisture, but the longer it moist-cures, the slower the rate of strength gain. Moist-curing concrete for 20 days more than doubles its strength compared with four days of moist-curing, which is considered a minimum.
Best Answer: Concrete's strength is normally expected to reach its design strength in 28 days if it has been cured properly. Curing properly involves keeping the concrete moistened with water for the duration of the curing period or by sealing the surface with a spray-on concrete cure and seal product.he full design loadings on the slab should be avoided for 28 days. The previous durations apply to normal and concrete placements as large as say 3 or 4' thick or more, mass concrete placements continue to cure for an extended period due to the heat of hydration and moisture content issues.