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What is the Concrete slab at entrance of building?

The slab is part of the overall foundation and footing system of the building. If it is outside, then it doesn't need to be water-proof or damp-proof. All interior foundation walls need to be water-proofed or damp-proofed depending on the hydrostatic pressure, found in the surrounding earth. Foundations and slabs-on-ground should be placed on good, compacted soil, or other acceptable aggregates. A solid slab should be a minimum 100mm thick.


How do you patch or seal an exposed rebar post tension cable in foundation slab?

Rebar and Post Tension cable (PT) are two entirely different items. Rebar is the static steel bars placed in the concrete while the PT are high tensile strength cables that were placed in concrete than stressed under hydraulic jacking to a tension generally around 2500 to 3500 psi. As a result, the situations for repair are different. The exposed rebar can be cleaned and patched through approved methods. However the PT should be looked at by a professional as it is an integral part of the structure and, as mentioned before, is under tensioned stress. If the exposed rebar is in a PT slab, caution should be used and a professional consulted as well, due the rebar being integrated with the PT.


Where can you put a bend in a 150mm sewer pipe between manholes?

A bend in a 150mm sewer pipe can typically be placed between manholes at locations where the pipe needs to change direction, such as at a junction or to navigate around obstacles. It's important to ensure that the bend adheres to local regulations and standards for sewer installations, which often specify the minimum radius for bends to prevent blockages. Additionally, the bend should be easily accessible for maintenance and inspection purposes.


Concrete cure time?

In anarid region, concrete placed as a road slab or roof slab gets dried up in a very short time, say within 2 hours.This condition should be maintained for 24 hours or at least till the final setting time of cement at which duration the concrete will haveassumed the finalvolume.Normally curing is done for 28days at 90% of strength gain is achievedUntil maximum design strength is achieved (should be 28 days): Concrete does not gain strength by "Drying out". It gains it through a process known as hydration. The road slabs used as an example in the first post will still undergo hydration once water makes contact with the concrete. (rain). k.k


How do you calculate the spray rate of asphalt prime coat?

AR = RAR / RAC Where: AR = application or shot rate of undiluted prime RAR = specified residual application rate RAC = residual asphalt content of prime There is good agreement in the literature on application rates. The Asphalt Institute recommends application rates of 0.9 to 2.3 L/m2 (0.2 to 0.5 gal/yd2) for MC cutbacks and 0.5 to 1.4 L/m2 per 25 mm of depth (0.1 to 0.3 gal/yd2/in depth) for asphalt emulsions. Others recommend from 0.65 L/m2 to 2.0 L/m2 (0.15 to 0.45 gal/yd2) . Application rates should vary based on the openness of the base and no more prime should be placed than can be absorbed by the granular base in 24 hours. Any excess should be removed with blotter sand.

Related Questions

How many field density test should be conducted if the frequency of test is 1 test per 500 Square meter?

field dry density test for 1 square meter area


What should a well constructed histogram reveal to you?

It should reveal the frequency density of the variable for the well-defined classes. From this, it should be easy to work out the exact frequency in each class.


What should the density of a substance be for it to sink?

The density of a substance should be greater than the density of the fluid it is placed in for it to sink. This is because objects sink when they are denser than the fluid they are in, causing them to displace the fluid and sink to the bottom.


What are the three factors you should consider when choosing one medium over the other?

Density, Frequency,Accuracy Type your answer here...


What is band limited signal?

A signal is said to be a band limited signal if all of it's frequency components are zero above a certain finite frequency. i.e it's power spectral density should be zero above the finite frequency.


How do you arrange substances in increasing order if you know their density and which substance sinks or floats in various liquids?

Arrange the substances based on their density from lowest to highest. The substance with the lowest density will float on top of liquids with higher densities, while the substance with the highest density will sink to the bottom. Therefore, the substance that floats in the most liquids should be placed at the top of the list, and the substance that sinks in the most liquids should be at the bottom.


Is inspections was conducted in 1995 correct to say?

No. it should be...."inspections were conducted in 1995"


What would happen in Saturn if it were placed in water?

It should float because it has a lower density than water. Of course that's not a very practical idea in reality.


Why appraisal for training should be conducted separately from appraisal for promotion?

how are IT training program conducted


How should a slide be placed on the microscope?

It should be placed under the clips.


Does the keyword density sink or float in the context of SEO optimization?

Keyword density is a term used in SEO to describe the frequency of a keyword or phrase on a webpage compared to the total number of words. In SEO optimization, keyword density should be balanced and not too high or too low. It is important to maintain a natural and relevant keyword density to improve search engine rankings.


For satellite communication the frequency should be less than critical frequency?

For satllite communication the frequency should not be less than the critical frequency because in satellite communicaton high frequency is needed which is reflected by satellite but not by the ionosphere.