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Form work stripping time Vs Compressive strength of Concrete
Gopal Mishra
The strength of concrete increases with age. The table shows the strength of concrete at different ages in comparison with the strength at 28 days after casting. Age Strength percent 1 day 16% 3 days 40% 7 days 65% 14 days 90% 28 days 99% So, the minimum stripping time of concrete should be such thaRead more
The strength of concrete increases with age. The table shows the strength of concrete at different ages in comparison with the strength at 28 days after casting.
So, the minimum stripping time of concrete should be such that it can gain sufficient compressive strength to withstand its self-weight.
If there is any construction to be carried out above the member, then that should only be carried out till the concrete has gained sufficient strength to withstand the working load, self-weight, and weight from construction above it. Till the concrete gains that much strength, the formwork should not be removed and no construction should be carried out above it.
Now we can not relate the compressive strength in MPa with the stripping time, as different members may have different requirements, and also it may have different grades of concrete. If we see the compressive strength gained in percent, then we can co-relate somehow based on the actual requirement of the structural member.
See lessWhat is Built up area and Super built up area?
Gopal Mishra
Built-up area and super built-up area is generally used in real-estate. It is used to calculate the cost of property per square feet or square meter. The built-up area is the carpet area plus the thickness of the outer walls and the balcony. The Super built-up area is the built-up area plus a proporRead more
Built-up area and super built-up area is generally used in real-estate. It is used to calculate the cost of property per square feet or square meter.
The built-up area is the carpet area plus the thickness of the outer walls and the balcony. The Super built-up area is the built-up area plus a proportionate area of common areas such as the lobby, lifts shaft, stairs, etc. Sometimes it may also include the common areas such, swimming pool, garden, clubhouse, etc.
The carpet area is the covered area of the usable spaces of rooms in the building. It is measured between walls to walls within the building and is the sum of the actual areas of the rooms where you can carpet.
Now, when the total cost of construction of a building including the cost of land or plot, is lets say, USD 10,000 and its carpet area is 1000 sqft, built-up area is 1250 sqft and super built-up area is 1500 sqft, then the cost of the building per square feet can be calculated as:
Cost per sqft of carpet area = USD 100,000/1000 = USD 100
Cost per sqft of built-up area = USD 100,000/1250 = USD 80
Cost per sqft of super built-up area = USD 100,000/1250 = USD 66.67
In this way, you can arrive at the actual cost of construction per square feet including the cost of land or plot. This can also be used to calculate the selling cost of the property.
See lessMaterials Used in Sustainable Concrete?
Gopal Mishra
Refer to this article: Sustainable Concrete Construction Methods and Practices for all details about materials and processes involved in sustainable concrete construction.
Refer to this article: Sustainable Concrete Construction Methods and Practices for all details about materials and processes involved in sustainable concrete construction.
See lessHow to Test Quality of Steel Reinforcement at Construction Site?
Gopal Mishra
I have not seen any test being carried out at the site for testing the quality of reinforcement steel. For its quality, a lab test is required. Also the test certificate from the manufacturer can be obtained to ascertain the quality of steel.
I have not seen any test being carried out at the site for testing the quality of reinforcement steel. For its quality, a lab test is required. Also the test certificate from the manufacturer can be obtained to ascertain the quality of steel.
See lessAdmixtures in concrete for to Delay Setting Times
Gopal Mishra
Any admixtures used in concrete, it is as per the recommendations of the manufacturer. Refer to the manufacturer's specification for the quantity of admixture to be used per cubic meter of concrete to delay the setting time.
Any admixtures used in concrete, it is as per the recommendations of the manufacturer. Refer to the manufacturer’s specification for the quantity of admixture to be used per cubic meter of concrete to delay the setting time.
See lessForm work stripping time Vs Compressive strength of Concrete
Gopal Mishra
Dear Seshachalam, the compressive strength of concrete does not depend on the formwork stripping time. Formwork stripping time is specified in order to prevent deflection and stability of the structural member. Compressive strength of concrete mainly depends on the quality control during mixing, traRead more
Dear Seshachalam, the compressive strength of concrete does not depend on the formwork stripping time. Formwork stripping time is specified in order to prevent deflection and stability of the structural member.
Compressive strength of concrete mainly depends on the quality control during mixing, transporting, placing, compacting, and curing of the concrete.
Early removal of formwork from concrete section may lead to:
Kindly refer this article: Concrete Formwork Removal Time, Specifications and Calculations
See lessWhat is the Applications of Unified Soil Classification System?
Gopal Mishra
Unified soil classification system is adopted by ASTM D-2487-98 and IS:1498-1970 for classification and identification of soils for general engineering purposes. Refer this article details on Unified Soil Classification System
Unified soil classification system is adopted by ASTM D-2487-98 and IS:1498-1970 for classification and identification of soils for general engineering purposes.
Refer this article details on Unified Soil Classification System
See lessWhat is the difference between Additional work and Extra work?
Gopal Mishra
Additional work and extra work with reference to what? In any construction contract?
Additional work and extra work with reference to what? In any construction contract?
See less