Strata Global

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Gravel

What is gravel?

Gravel is any loose rock material characterized by its particle size. It may be classified as granular with particles ranging in diameter from 2 to 60 mm. Gravel forms through natural processes such as weathering and erosion, often occurring in deposits or produced by crushing larger stones at quarries.

Types of gravel

Gravel is available in various kinds which are applied to buildings as well as landscape designs in equal measure.

  • Pea gravel: It refers to pea gravel approximately 3/8 inches in diameter and is composed of small, smooth, and round aggregate stones. 
  • Crushed stone: Crushed stones are produced through the crushing of boulders and rocks. Its produced product proves useful in construction whenever there is a necessity for the application of strength.
  • Bank gravel: Bank run or river run gravel contains a natural mixture of sand, clay, and rock which can be found along streams, sides or banks. It can be used in many ways such as construction material or fillers for other materials like concrete.
  • Coarse gravel: Coarse gravel with particle sizes ranging from 20 mm up to 60mm is necessary in building drainage systems that work effectively; also serves as an unyielding foundation layer preventing settlement while giving support.
  • Fine gravel: Fine gravel consists of particles sized between 2mm – 8mm making it suitable for use on driveways, patios, garden paths etcetera. Smaller granules create a smooth surface finish which enhances both aesthetic appearance and walkability.

Uses and benefits of gravel

Pebbles are multifunctional and carry several advantages which is why they are commonly used for different purposes:

  • Drainage: The main function of pebbles is to drain well, which prevents water from accumulating and keeps buildings safe from dampness.
  • Beauty: Gravel comes in various colors and sizes that can be used to enhance the look of any landscape design.
  • Environmental friendly: It allows water to seep into the ground thereby recharging underground water hence it also acts as an eco-friendly surface option that reduces runoff.
  • Long lasting & easy to maintain: Being durable means it does not crack or split like other materials do therefore making them cost effective over time because they require less maintenance.

Where can we use gravel?

Gravel is such a versatile construction material and it is commonly used hence it has different benefits in civil engineering projects. This is how different civil engineering and construction applications take advantage of it:

  • Roads and driveways: The gravel acts as a flexible ground cover that makes up the base layer for roads and driveways to enhance drainage and accommodate temperature fluctuations, which will prevent cracking on the surface.
  • Foundations and base layers: Gravel is spread beneath walkways, patios, pavers, etc to help prevent differential settlement by evenly spreading the load.
  • Concrete production: It is important to include gravel as the main component of concrete because it increases its strength and durability, making it perfect for various building projects.
  • Landscaping and erosion control: Gravel helps soil retain its cohesion if the area is likely to erode while allowing water infiltration that mitigates runoff from being excessive.
  • Pipe bedding and drainage systems: In addition, gravel supports underground pipes as well as being an integral component of French drains or septic fields.

Environmental management

  • Drainage systems: In drainage systems, gravel serves as a prevention against accumulation of water which could cause erosion or damage to structures. French drains use it; dry wells use it; and it can even be used to line drainage ditches.
  • Water filtration: As water infiltrates through septic tanks or stormwater management systems; it acts as an organic filter by cleansing itself of impurities from liquid portions of these facilities and then getting into surrounding soils with the aid of gravels.

Why is gravel important in construction?

Gravel, therefore, can never be underestimated during construction since this brings not only structural advantages but also cost-effectiveness. It provides a firm foundation that makes it very stable and long-lasting for any erected structure on its surface. Also, being a good compacting agent, it serves as compacted base course material used in roads and pavements, hence distributing loads uniformly to reduce the cost of maintenance. Furthermore, the permeability of gravel helps in the effective drainage of water, which, in return, reduces the risk of water-related damage and erosion. It enhances the strength and durability of the final product in production of concrete. Also, aesthetically pleasing, colored gravels make it a perfect ground cover for landscaping and decorative purposes, giving it an extra layer of functionality on top of its already impressive list of benefits.

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Director, President – Glen Raven Technical Fabrics

Strata/Glen Raven tenure: 10 years/28 years
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MBA – Wake Forest University

 

Directs the strategic direction of Glen Raven’s automotive, protective apparel, military, geogrid, outdoor and logistic businesses.

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MBA – Georgia State University

 

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Director

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Phil McGoldrick

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Strata tenure: 7 years
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Civil & Geotechnical Engineer (First class)


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