The phrase 'concrete threshold' is correct and usable in written English.
In this context, 'concrete threshold' typically refers to a raised surface or piece of material laid across an entrance or doorway which is made of concrete. For example, "The home was built with a wide concrete threshold, making it difficult for wheelchair users to enter."
Analytical differentiation techniques are used to determine the sensitivity of the time to corrosion initiation to the four governing parameters of the model, which include chloride diffusivity in concrete, chloride threshold level of steel reinforcement, concrete cover depth, and surface chloride concentration.
The assay avoids radioactivity as well as very low-throughput SDS-PAGE andlyses and, unlike SDS-PAGE-based PTT, uses concrete mathematical thresholds to distinguish mutant and WT samples.
A concrete "saddle" or "threshold" across the garage floor raised about an inch or two and positioned under the door will give you a smooth surface for the door to close against and will keep water from running in under the door.
The concrete value of the threshold has been derived.
The concrete value of the threshold is given by the following theorem.
In addition, the pH values of the blended cement concretes are above the threshold limit recommended for depassivation.
This research studied the initial corrosion of reinforced concrete presented by the chloride threshold penetration depth of concrete exposed to marine environment.
The MCNP computations predicted that for a standard error of 10% in counting statistics, the detection of a 2000 ppm chloride concentration (the corrosion threshold) in reinforced concrete can be achieved in a seven minute counting period.
Open image in new window Fig. 10 The ratio of chloride concentration at the depth of steel bars in the concrete matrix C and the threshold chloride concentration ( C_{cr} ) as function of the exposure time t.
As said in the introduction section, the time to corrosion initiation t cr the instant at which the chloride concentration C at the depth of the rebars in the concrete matrix exceeds the chloride threshold concentration for the depassivation ( C_{cr} ).
