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How many field density test should be conducted if the frequency of tests is 1 test per 150m2 placed?
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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.
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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.
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.
Should Portland cement be capitalized?
According to the Portland Cement Association, portland cement should not be capitalized.
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?
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What are the three factors you should consider when choosing one medium over the other?
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Is inspections was conducted in 1995 correct to say?
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How should a slide be placed on the microscope?
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Research should be conducted in an environment that is?
Free From Bias
