Thus, to cope with the applied pressure from vehicle wheels, it should be sufficiently stiff and to resist cracking exerted by other pressures, it should possess adequate flexural strength. Asphalt concrete is also called as asphalt, blacktop or pavement in North America, and tarmac or bitumen macadam or rolled asphalt in the United Kingdom and the Republic of Ireland.These are concrete that is placed and compacted with the help of earth moving equipment like heavy rollers. You will receive a link and will create a new password via email.Sorry, you do not have permission to ask a question, You must login to ask question.

These units have the advantage of acquiring speedy construction as only assemblage is necessary. The entrained air accounts for 3 to 6% of the concrete. The mixed concrete is brought to the site with the help of a truck-mounted transit mixer. This helps reduce hydroplaning, snow buildup and tire spray, making the pavements safer for pedestrians and drivers. All the water used for mixing is not required for hydration so it’s removed before hardening takes place. This will hence reduce the amount of polymer that is necessary to bind the aggregates used.Hence the aggregates are graded and mixed accordingly to achieve minimum voids hence maximum density.The concretes that have strength greater than 40MPa can be termed as high strength concrete.

Distinctive splashes of colored glass are incorporated in large format slabs used in flooring. Like other types of concrete, pervious concrete is made from a mixture of cement, water and coarse aggregates. The temperature is low even during the paving operations, ensuring safety for the working crew and earlier opening of the road for use.Cold mix asphalt is commonly used for roads with lighter vehicle traffic.

Aerated Concrete is a variety of extremely lightweight concrete ( density 480-800 Kg/m 3). VIP members get additional benefits.Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. This bond will control the strength and the durability factors of the concrete.Most of the mega concrete projects are carried out through prestressed concrete units. Once the concrete sets and harden, the structural unit will be put in compression.This phenomenon of prestressing will make the lower section of the concrete member to be stronger against the tension.The process of prestressing will require heavy equipment and labor skill (jacks and equipment for tensioning). Hence one such property of concrete to easily pump will result in the design of pumpable concrete.The concrete that is used for pumping must be of adequate workability so that it is easily conveyed through the pipe.

Over time, this coating increases the asphalt’s strength.Glass concrete is used to describe the integration of glass into exposed concrete, opening up a whole new set of It is used in residential as well as commercial applications in a variety of ways. Its production doesn’t require heating as it makes use of a specific bitumen emulsion.

These types of concrete will have 15 to 20% voids of the volume of the concrete when they are designed.The pervious concrete is created by unique mixing process, performance, application methods etc.

Use of meshes in concrete will give ferrocement.Whatever be the type of reinforcement used in concrete, it is very necessary to ensure proper bond between the concrete and the reinforcement. Details of these various types of concrete, their properties and applications are discussed.Properties and uses of different types of concrete mentioned above are explained briefly:The concrete that is obtained by mixing the basic ingredients cement, water and aggregate will give us normal strength concrete. 4000PSI concrete is used for heavy traffic pavement, heavy use floor slabs like shops and warehouses, and concrete footings designed to support heavy loads. The reason why ready-mix concrete is preferred over on-site concrete mixing is that it helps reduce worksite confusion and offers a mixture with high precision.However, construction sites are often too far from the factories where ready mix concrete is produced and mixed.

The normal strength concrete has an initial setting time of 30 to 90 minutes that is dependent on the cement properties and the weather conditions of the construction site.The plain concrete will have no reinforcement in it. While reinforcement, it is important to establish a close bond between the concrete and the reinforcement steel. To remove the water, vacuum pumps containing vacuum mats are commonly used.Not only is the final strength of the vacuum concrete improved by 25%, but its stiffening pace also improves such that the form-works can be removed within 30 minutes of casting even on high columns.