Fasi Ur Rahman - Answers
Home/ Fasi Ur Rahman/AnswersDo you need to remove the ads? Join now!
Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. When you join you get additional benefits.
Log in to TheConstructor to ask questions, answer people’s questions, write articles & connect with other people. When you join you get additional benefits.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Concrete strength results
Fasi Ur Rahman
Answer- Without knowing the ultimate strength of the concrete mix, the results obtained on the 7th day can not be declared as right or wrong. Considering the results obtained on the 7th day, i.e, 8.137 N/mm2, the designed strength of the concrete mix shall be M12. The results obtained on the 7th dayRead more
Answer-
- Without knowing the ultimate strength of the concrete mix, the results obtained on the 7th day can not be declared as right or wrong.
- Considering the results obtained on the 7th day, i.e, 8.137 N/mm2, the designed strength of the concrete mix shall be M12.
- The results obtained on the 7th day must be 66% of the ultimate strength. So the ultimate strength of the concrete for the mix that can be expected on 28th day shall be 12 N/mm2.
See lessIs the quality of welding (shown in the picture) acceptable in column lapping?
Fasi Ur Rahman
This is the wrong method of lapping rebars in the column. The lapping length of the rebar must be 46d. For 16mm bar, =16 x 48 =768mm The lapping shall be shattered and not in one place. And the welding must be done for the whole 768mm on both sides.
This is the wrong method of lapping rebars in the column.
The lapping length of the rebar must be 46d.
For 16mm bar,
=16 x 48 =768mm
The lapping shall be shattered and not in one place.
And the welding must be done for the whole 768mm on both sides.
See lessIs it safe not to build a colunm at an intersection of two beams?
Fasi Ur Rahman
Yes, it is safe not to build a column at an intersection of two beams subjected that all the loads are considered, calculated, and transferred via columns placed at the end of the beams.
Yes, it is safe not to build a column at an intersection of two beams subjected that all the loads are considered, calculated, and transferred via columns placed at the end of the beams.
See lessWhat are the tests conducted on fly ash before using it as a replacement for cement?
Fasi Ur Rahman
The test conducted on fly ash prior to being used as replacement for cement are- Fineness of Fly Ash Specific Gravity of Fly Ash Size and Shape of Fly Ash Colour To know more about the detail in types of fly ash, test, properties, and uses, click the links below- Fly Ash – Properties, Types, MechaniRead more
The test conducted on fly ash prior to being used as replacement for cement are-
To know more about the detail in types of fly ash, test, properties, and uses, click the links below-
Fly Ash – Properties, Types, Mechanism and Uses
Fly Ash – Properties, Types, Mechanism and Uses
Concrete without Cement – A Green Alternative Fly Ash
See lessExplain the operating principle of the rebound hammer?
Fasi Ur Rahman
The rebound hammer test method is based on the principle that the rebound of an elastic mass depends on the hardness of the concrete surface against which the mass strikes. The operation of the rebound hammer is shown in figure-1. When the plunger of the rebound hammer is pressed against the concretRead more
The rebound hammer test method is based on the principle that the rebound of an elastic mass depends on the hardness of the concrete surface against which the mass strikes. The operation of the rebound hammer is shown in figure-1. When the plunger of the rebound hammer is pressed against the concrete surface, the spring-controlled mass in the hammer rebounds. The amount of rebound of the mass depends on the hardness of the concrete surface.
Thus, the hardness of concrete and rebound hammer reading can be correlated with the compressive strength of concrete. The rebound value is read off along a graduated scale and is designated as the rebound number or rebound index. The compressive strength can be read directly from the graph provided on the hammer’s body.
For more details on principle, procedure, advantages & disadvantages of rebound hammer test, kindly check the article below-
Rebound Hammer Test on Concrete – Principle, Procedure, Advantages & Disadvantages
See lessWhat is the effect on strength of concrete if an RMC transit mixer is halted for 3 hours?
Fasi Ur Rahman
The first thing we need to know is the amount of retarder used for the preparation of concrete. Generally, the concrete starts to harden after 30mins of adding water into it. By the use of a retarder, the setting time of the concrete is delayed. Generally, for RMC mix concrete the setting time startRead more
The first thing we need to know is the amount of retarder used for the preparation of concrete. Generally, the concrete starts to harden after 30mins of adding water into it.
See lessBy the use of a retarder, the setting time of the concrete is delayed. Generally, for RMC mix concrete the setting time starts after 4hrs.
Thus, in your case, there shall be no effect on the strength of concrete.
But it is advised to check the slump of the concrete before pouring.
In the case of the Multistorey Building, is there is any change in the design of slab and beam for different floors?
Fasi Ur Rahman
Dear Gurkirtan Sharma, The design procedure for all the floors in the multi-storage building remains the same. However, the loads and other design parameters shall change depending upon the floor. For more details, kindly check the below article- Structural Systems for Construction of Multistory BuiRead more
Dear Gurkirtan Sharma,
The design procedure for all the floors in the multi-storage building remains the same. However, the loads and other design parameters shall change depending upon the floor.
For more details, kindly check the below article-
Structural Systems for Construction of Multistory Building
See lessName the best book for fire safety in high-rise buildings?
Fasi Ur Rahman
Fire Safety in High Rise Buildings by Daniel Alvear
Fire Safety in High Rise Buildings by Daniel Alvear
See less