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insitu concrete is any concrete structure that is poured in its desired finished place. ie floor slabs of buildings because they are poured and never moved

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What is mean by pcc in civil engineering?

PCC in construction refers to Plain Cement Concrete, which is used as a preparatory base for laying RCC footing. Though PCC is also concrete, this is lean in nature, the ratio being 1:4:8. The compressive strength achieved with this mix is normally 7.5kN/sq.mm.


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


What is the ratio of concrete to the number of blocks made in the making of concrete blocks?

The ratio of the concrete in the construction of concrete block is different from place to place. As i know about the ratio of the constituents of the concrete block is given below The composition of blocks Constituents is given below; These ratios are calculated on Tatkey( ) basis i.e. 1 Wheel barrow = 2 Tatkey 1 Cement bag = 2 Tatkey 1) 1 : 4 : 6 (by Volume) ( 1 : 5 ) 2) 1 : 4 : 8 (by Volume) ( 1 : 6 ) 3) 1 : 5 : 9 (by Volume) ( 1 : 7 )


How to mix concrete ratio effectively for a strong and durable construction project?

To mix concrete effectively for a strong and durable construction project, use a ratio of 1 part cement, 2 parts sand, and 3 parts gravel or crushed stone. This balanced mix will ensure proper strength and durability for your project.


Concrete grade M 30?

What is mixing ratio for concrete grade 30


What is M20 concrete grade?

M20 refers to the grade of the concrete generally used in construction purpose. Here, M refers to mix & number 20 refers to the characteristic strength of concrete. the proportions of this grade is (1:1 1/2: 3). Along with this there are some more grades used in constructions i.e., M5, M7.5, M10, M15, M25, M30................. M80


What did the Romans develop to use for their construction?

The Romans were first to fully appreciate the advantages of the arch, the vault and the dome. The arch has a strong lad bearing capacity. The Etruscans invented the simple barrel arch and Pergamon invented the vault (adjacent arches which are assembled side by side) which has an even greater load bearing capacity and whose structure is also suited to support large roofs. The Romans invented segmental arch as they realised that an arch did not have to be a semicircle. The Roman used the arch to build gates, aqueducts, bridges which were much longer than before and could cross much wider rivers and valleys. The arches, especially the vault, became essential for the construction of large scale buildings. The Romans also developed a new and much stronger type of concrete which was as resistant as modern concrete and also set underwater (this enabled them to build much bigger docks for ports). However, it was not as fluid as modern concrete and had to be layered by hand. The arch, the vault and concrete were what made the construction of such a massive structure as the Colosseum possible. Concrete was also used to build domes. The Pantheon (a temple which has been turned into a church) in Rome is still the largest unreinforced concrete dome in the world. Often the Romans used a mixture of stone, brick and concrete (for the Colosseum stone and concrete were used). The Romans also used columns to build temples and porticoes. The Romans built scaffolding around what they were building. They adopted the cranes of the Greeks and massively improved on them. The simplest one was the trispastos, which had of a single-beam, a winch, a rope, and a block with three pulleys. It had had a mechanical advantage of 3:1, and single man operating the winch could raise 150 kg. The pentaspastos had five pulleys and the polyspastos had a set of three by five pulleys with two, three or four masts. The latter was worked by four men at both sides of the winch and could lift 3,000 kg. When the winch was replaced by a treadwheel, the load could be doubled to 6,000 kg with only half the crew, because the treadwheel had a larger diameter and thus a much bigger mechanical advantage.


What is the ideal ratio for a cement and sand mix for a strong and durable concrete structure?

The ideal ratio for a cement and sand mix for a strong and durable concrete structure is typically 1 part cement to 3 parts sand. This ratio helps ensure the concrete has the right balance of strength and durability for construction projects.


What is the ideal cement and sand ratio for creating a strong and durable concrete mixture?

The ideal cement and sand ratio for creating a strong and durable concrete mixture is typically 1 part cement to 3 parts sand. This ratio helps ensure the concrete has the right balance of strength and workability for various construction projects.


What is the ideal ratio of cement to sand for creating a strong and durable concrete mixture?

The ideal ratio of cement to sand for creating a strong and durable concrete mixture is typically 1 part cement to 3 parts sand. This ratio helps ensure the concrete has the right balance of strength and durability for various construction projects.


Formula of concrete ratio 1.2.4?

Formula of concrete ratio 1:2:4 means 1 part of cement, 2 parts of fine aggregate(sand) and 3 parts of coarse aggregate(gravel). Other examples of command concrete mixture ratio are 1:3:6 , 1:1.5:3 and 1:4:8. Water use in concrete mixture is based on water/cement ratio, for example 0.5 or 0.6.


What are the safer construction practices for cyclones?

the safer construction to prevent cyclones are: 1) the house must be built with a strong concrete 2) if budget for strong concrete is not available then dig an underground tunnel for vacating if there is disaster.