sir please solve this question. It is my assignment problem of 10 marks so pleas

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sir please solve this question. It is my assignment problem of 10 marks so please give answer like that sir i want detailed answer and all the part should answered and explain each and every part i am sending this question for the 2nd time last time i didnt get complete answer sir if u want to take time take ur time please give me best solution of it
Thankyou so mch

Part-A (10 marks) Preamble Over the years it has been observed that during heavy rainfall rigid pavement leads to splashing whereas flexible pavement experiences continuous seepage, ultimately giving rise to potholes and distresses Permeable pavement is a pavement with a base and sub base that allows the movement of storm water through the surface. One such example is porous concrete. In porous concrete, carefully controlled amounts of water and cementitious materials are used to create a paste that forms a thick coating around aggregate particles. A pervious concrete mixture contains little or no sand, creating a substantial void content. Using sufficient paste to coat and bind the aggregate particles together creates a system of highly permeable, interconnected voids that drains quickly. In the above context debate on the statement: "Porous concrete pavement is preferred over conventional pavements". Your report should include the following: A.1.1 Advantages and disadvantages of porous concrete pavement A.1.2 Advantages and disadvantages of rigid and flexible pavements A.1.3 Justification of the stance taken and Conclusion.

Explanation / Answer

The porous concrete is also known as Pervious concrete. Pervious concrete pavement is a unique and effective means to address important environmental issues and support green, sustainable growth. By capturing stormwater and allowing it to seep into the ground, porous concrete is instrumental in recharging groundwater, reducing stormwater runoff, and meeting U.S. Environmental Protection Agency (EPA) stormwater regulations. In fact, the use of pervious concrete is among the Best Management Practices (BMPs) recommended by the EPA — and by other agencies and geotechnical engineers across the country - for the management of stormwater runoff on a regional and local basis.

This pavement technology creates more efficient land use by eliminating the need for retention ponds, swales, and other stormwater management devices. In doing so, pervious concrete has the ability to lower overall project costs on a first-cost basis. In pervious concrete, carefully controlled amounts of water and cementitious materials are used to create a paste that forms a thick coating around aggregate particles. A pervious concrete mixture contains little or no sand, creating a substantial void content. Using sufficient paste to coat and bind the aggregate particles together creates a system of highly permeable, interconnected voids that drains quickly.

Typically, between 15% and 25% voids are achieved in the hardened concrete, and flow rates for water through pervious concrete are typically around 480 in/hr (0.34 cm/s, which is 5 gal/ft²/ min or 200 L/m²/min), although they can be much higher. Both the low mortar content and high porosity also reduce strength compared to conventional concrete mixtures, but sufficient strength for many applications is readily achieved. While pervious concrete can be used for a surprising number of applications, its primary use is in pavement. This site focuses on the pavement applications of the material, which also has been referred to as porous concrete, permeable concrete, no-fines concrete, gap-graded concrete, and enhanced-porosity concrete.

The advantages of pervious concrete are as follows:

The disadvantages of pervious concrete are:

Rigid pavements have a high compressive strength, which tends to distribute the load over a relatively wide area of soil. The advantages of rigid pavement are as follows:

The disadvantages of rigid pavement are:

High initial costs

Joints required for contraction and expansion

Generally rough riding quality

High repair costs

Flexible pavements consist of a series of layers, with the highest quality materials at or near the surface. The strength of a flexible pavement is a result of building up thick layers and thereby distributing the load over the sub grade; the surface material does not assume the structural strengths as with rigid pavements.The advantages of flexible pavement are as follows:

Adaptability to stage construction

Availability of low-cost types that can be easily built

Ability to be easily opened and patched

Easy to repair frost heave and settlement

Resistance to the formation of ice glaze

The disadvantages of flexible pavement are as follows:

Higher maintenance costs

Shorter life span under heavy use

Damage by oils and certain chemicals

Weak edges that may require curbs or edge devices

The above explanation gives out the result that the pervious pavement is better than conventional pavement as there are many advantages of the permeable pavement,but there are disadvantages too. But if we check the overall advantages as well as disadvantages,if shows us that the permeable pavement is quite beneficial to use where there is a problem of rain or snowfall.

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