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up vote 5 down vote. If you have an interface or abstract class, it need to be implemented. A class that implements such an interface or class is called a concrete implementation (because only such an implemented class can be instantiated).

Workability is a property of raw or fresh concrete mixture. In simple words, workability means the ease of placement and workable concrete means the concrete which can be placed and can be compacted easily without any segregation. Workability is a vital property of .

Consequently, as the W/C ratio increases, the porosity of the cement paste in the concrete also increases. As the porosity increases, the compressive strength of the concrete decreases. STRENGTH OF CEMENT V/S STRENGTH OF CONCRETE. It is not possible to design a concrete mix of high strength with cement of low strength.

Nov 26, 2017· Concrete Creep Definition, Creep deformation Stages Design Strategies. Creep is a timedependent permanent (plastic) deformation under a certain applied load. Generally, creep occurs at high temperature (thermal creep) but can also happen at room temperature depending on the material ( lead or glass), although this happens at a much slower rate.

When concrete dries out, the suction forces developed when water evaporates from the pores in the concrete can actually crush weak cement paste. The longer the concrete remains moist, the greater its strength and the greater the resistance to the suction forces. .

What does this mean for slump measurements that are low by 1/4 inch? First of all, by all ASTM and AASHTO standards, the measurement of slump is to the nearest 1/4 inch, which is a tight measurement for such a crude test.

Concrete, usually Portland cement concrete, is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens over time—most frequently a limebased cement binder, such as Portland cement, but sometimes with other hydraulic cements, such as a calcium aluminate cement.

Jul 10, 2018· For efflorescence to happen, you need water and salt. The salt comes from a range of sources. First, it may already be present inside the , stone or concrete. Or, the source may be the grout or Portland cement holding surfaces together. If the surface, such as a retaining wall, is in contact with soil, efflorescence could form.

What is the difference between a concrete class and an abstract class? Ask Question 51. 29. ... Because of the definition: Concrete is "Existing in reality or in real experience; ... but what is the difference between normal derived class and concrete class? – coming out of void Jan 27 '10 at 18:19.

A concrete class is used to define a useful object that can be instantiated as an automatic variable on the program stack. The implementation of a concrete class is defined. The concrete class is not intended to be a base class and no attempt to minimize dependency on other classes in the implementation or behavior of the class. .

Lean concrete is made with low cementitious material content. This means that it does not have many of the heavy, highdensity rock and sand elements that normal concrete has. Instead, it can use a mixture of standard concrete materials, reclaimed and crushed concrete, discarded sand and recycled ash.

Reinforced concrete pipe definition, categories, type and other relevant information provided by All Acronyms. RCP stands for Reinforced concrete pipe

Mar 16, 2018· A common noun is a nonspecific noun, whereas a concrete noun is a physical thing (for lack of a more general term). Explanation: A common noun is a word that describes a type of object or concept(1) ( police, town, train, emotions, etc.), as opposed to proper nouns ( Lincoln).

Jun 01, 2012· Usually concrete is specified in terms of 28 day compressive strength, which is typically at least 3000 psi. How many sacks of cement are required per cubic yard of concrete is usually left to the concrete supplier to figure out, as long as they make the required compressive strength, the number of sacks of cement per yard is not critical,...

What is the abbreviation for concrete? Looking for the shorthand of concrete ? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: concrete .

C Grade Concretes. Grade C25, C30, C35, C40, C45, C50 concretes; conforming to BS 8110, Code of practice for the structural use of concrete. Classification