0
The strength of concrete depends on the mix used to make it- ratio of cement, sand, gravel and water. If the mix does not produce a concrete that is strong enough, the concrete will break.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
Why is it important to have workable concrete?
simply workabilty is the w/c ratio in concrete. more the w/c ratio higher the workability and vice versa. and it is true that excess amount of w/c ratio doesnt give proper strength. so workable concrete i.e, concrete with proper w/c is must for good strength. *note: not considering the mix of concrete.
What is the difference between concrete grade and concrete strength?
concrete grade and strength are both revalent since if grade increase setting time will be less and curing to be done propely so that concrete strength will reach higher. If concrete grade is low curing to done longer days upto intial setting time to reach proper strength
What does it mean if you measure concrete strength to be 50 MPa?
The units of Mpa is N/mm2 so this means that the concrete can resist a compresion forse of 50 newtons spread over 1 mm2 *Note if this value is a measured value a safety factor needs to be applied if it is to be used in construction, this factor are specified in you country's design code
Why steel is used to reinforce concrete explain it?
There are two main loading conditions that concrete under goes. These are Compression and Tension. Concrete is very strong in compression and is very weak in Tension (pulling apart). Concrete has so little strength to resist tension it is assumed to have no strength in tension. When civil engineers design concrete structures they can determine where the tension and compression will be located. Steel is added to give the concrete tensile strength. For Example a concrete beam when loaded from the top will experience compression on top section of the beam. The top portion of the beam will push inwards creating compression while the bottom section will pull apart creating tension. (Imagine a smile shape). :) Therefore reinforcement will be needed in the tension area (bottom).
How water cement ratio and workability is related to compaction factor?
If you are talking about shrinkage, then quite a bit. To make concrete, cement and water react together. There is a specific amount of water required to hydrate the concrete. Any water extra must leave the concrete and while it makes the concrete more workable, hurts the concrete is several ways. The volume of the concrete will change by whatever excess water you have added. To get workability, it's always best to use a water reducing admixture.
Why is it important to have workable concrete?
simply workabilty is the w/c ratio in concrete. more the w/c ratio higher the workability and vice versa. and it is true that excess amount of w/c ratio doesnt give proper strength. so workable concrete i.e, concrete with proper w/c is must for good strength. *note: not considering the mix of concrete.
What is the difference between concrete grade and concrete strength?
concrete grade and strength are both revalent since if grade increase setting time will be less and curing to be done propely so that concrete strength will reach higher. If concrete grade is low curing to done longer days upto intial setting time to reach proper strength
What is curing of concrete?
The curing of concrete is a reaction between the type of cement in the concrete and the water. This reaction between cement and water is known as hydration. When the concrete sets and gains strength through this process it is known as curing. Test cylinders of concrete for construction projects are placed in a curing room where they are continuous misted with water at 23 +-2 degrees Celsius for 7 and 28 days before testing. This provides adequate curing.
Why iron metal is used in building construction?
It deals with the tension and compression of the concrete. Concrete is a really great material when in comes to compression. It has a high strength in compression but little in the way of tension. You can test this for your self. Get a small unreinforced piece of concrete and pull it apart it ( put it in tension) and it breaks fairy easily. Now, try pushing together (put it in compression) and it doesn't break anywhere near as easily, if you can break it at all. Steel is the opposite. It has more strength in tension than in compression. Putting steel bars in concrete allows you to have good strength in compression and in tension. In an easy way to understand it and get the general idea, when the reinforced concrete is under tension, the steel bars take over, and when the reinforced concrete is under compression, the concrete takes over.
Which Roman accomplishment was most important written laws aqueducts cement widespread use of arch roads or a calendar?
In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.In the list of Roman accomplishments you mention, there was not one that can be singled out as the "most important". They all had different purposes so they were all important in their own areas. The laws were important in the civil area, the aqueducts in the health area, the concrete and arches were important in the construction area, the roads in transportation and the calendar in the time and record keeping areas.
Why are there cracks on concrete paths?
Concrete has great compressional strength but very weak torque resistance. That means when the ground underneath concrete paths settles or erodes the concrete will crack. In order to determine where the concrete will crack the constructors leave faults in it. So when the concrete does crack it does so in such a manner that the path is still functional and aesthetic.
What does it mean if you measure concrete strength to be 50 MPa?
The units of Mpa is N/mm2 so this means that the concrete can resist a compresion forse of 50 newtons spread over 1 mm2 *Note if this value is a measured value a safety factor needs to be applied if it is to be used in construction, this factor are specified in you country's design code
Why is a construction budget so important?
anal
What was the key to the support of the Colosseum in Rome?
Concrete and the vaulted arches were keys to the support of the Colosseum. It was built with a mixture of concrete and stone. The Romans were in the middle of developing concrete and were unsure of its strength and durability, so they used stone as well. Roman concrete proved to be very strong and long lasting and it is mainly due to this that it has survived. Moreover, unlike stone, it cannot be quarried to be used as building material elsewhere, which is the main reason why so many Roman buildings are in ruin. The great load-bearing strength of the vaulted arch was also very important in supporting the Colosseum.
What is difference between MS rods and TMT bars?
TMT Bars - High strength deformed steel bars used for concrete reinforcement. The surface has many short ribs to allow the concrete to adhere better than if the bars had a smooth surface.MS Rods - Mild Steel rods are used to construct many things (such as scaffold construction), but are not the best choice for concrete. The surface of the rod is smooth, so it does not allow the concrete to adhere as well as if the surface had a texture.
Various Benefits of Precast Concrete Construction ?
Precast concrete is a concrete construction product that is made using molds under controlled process conditions. They are later on shipped to the construction sites for use. This technique first evolved in 1904, helps in the creation of concrete products that are much better in uniformity and quality as compared to the usual concreted that is poured and cured on the construction site. Prefabricated concrete is made in the plants that maintain controlled conditions resulting in a much better strength and quality than concrete construction. As these products are produced in the precast molds, the concrete gets a chance to cure to the desired specifications. There are numerous advantages of using these precast concrete products in various constructions. As compared to the concrete construction, these precast concrete blocks have greater fire resistance, strength, resistance to chemicals, lower maintenance costs, easy and quick installation and aesthetics. The plants processing precast concrete products have a specialization in this process and can offer them in various sizes, shapes, finish or colors that are not possible in the usual concrete construction projects. The cost of construction also reduces significantly as molds can be easily reused again and again. Aside from this, precast concrete products are made for connecting with one another to make a structure, so they save lot of expenses on labor as well. They also save lot of construction time as they are just lifted and installed in place in a mechanized way. Precast concrete products are being used worldwide for various construction projects. Many high risers, houses, warehouses, building walls, pump stations, containers for storing waste, transportation structures like platform risers and terminal buildings are made using precast concrete. Many houses are now being made using precast concrete walls because they are more durable and entail low labor cost. The walls made using prefabricated concrete can last much longer than simple concrete construction due to their high resistance to elements. The walls that are made using prefabricated concrete can either be single layered or double layered according to the design requirements. The double layered walls are sometimes called sandwich walls because they have a wide layer of insulation in between the two concrete layers. As these walls are made to the exact specifications, they can be produced with the exact access openings for doors, windows or pipes.
What is the strength of M-30 after 7 days?
Seven days strength of any concrete usually comes 67% of 28 day strength. So 7 day strength of M30 may be .67*30=20.10 MPa
