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Development of Special Concretes

Study the basic properties and mix proportioning of ordinary concrete and special concretes in this free online course.

Publisher: NPTEL
Concrete is one of the most commonly used construction materials, but its use under certain circumstances presents unique challenges that require special skills to handle. This exciting free online course will equip you with these skills by first taking you through the basics of normal concrete and then introducing you to special concretes used in hot and cold weather and marine environments. So do not be left out, start the course today!
Development of Special Concretes
  • Duration

    10-15 Hours
  • Students

    13
  • Accreditation

    CPD

Description

Modules

Outcome

Certification

View course modules

Description

Concrete is a widely used construction material that is preferred for its strength, durability, and fire resistance, among numerous other advantages. Many engineers, contractors, and technicians are familiar with its use under normal circumstances. However, few have the technical expertise of concreting under unique conditions and environments. In this free online course, you will learn the skills needed to handle concreting under ordinary circumstances and the special concretes used in hot and cold weather conditions and underwater or marine environments. First, you will be introduced to normal concretes, their composition and the properties of materials that are mixed to make concrete. While this might appear simple, it is not. As you will discover, it takes special skills and expertise to determine the proportion of each ingredient that will be used. This is important because the resulting concrete mix must achieve the target strength, workability, and other characteristics. You will learn about the methods used for estimating these proportions and the ratios of the constituent materials. After that, you will study the properties of the concrete in both fresh and hardened state. While hardened concrete appears to be a very solid material, it is not entirely so, as it contains tiny spaces known as pores. This will be analyzed in detail.

Next, special concretes will be introduced to you, beginning with the additives, technically known as admixtures, which are added to ordinary concrete to improve its properties. This will be followed by a discussion about concreting in cold weather and its effect on concrete curing and strength development. The methods used to overcome these challenges will be explored. Concreting during hot weather and measures that are taken to minimise its adverse effect on concrete will be addressed. You will also realise the importance of using the correct methods and specifications, from mixing concrete to transport, placing, and compaction. The heat of hydration given out during curing and the challenges it poses, particularly with mass concrete, will be presented. This will pave the way for the discussion on the specially-formulated anti-washout underwater concrete and how it is prepared. As you will find out, specially-mixed concrete is used for the marine or aquatic environment. One of the most interesting procedures is placing the concrete and compacting it underwater. You will learn how this is done while ensuring that ocean waves and tides do not wash away the concrete.

Lastly, you will study the roller-compacted concrete and where it used. The methods used in preparing, placing, and consolidating it will be discussed too. Construction in unusual conditions and circumstances is increasing as more offshore structures are being built, from jetties to shipping docks to bridges connecting different places. Construction in predominantly hot and cold climatic regions is also occurring as buildings, roads, and bridges are being developed. Therefore, professionals in the construction industry are required to be versatile, well-versed and equipped with unique skills, particularly in concrete work, for these circumstances. This course will benefit anyone in the construction industry, from engineers to contractors and artisans, especially those seeking to expand and diversify their skillset or refresh their knowledge. Students and anyone aspiring to join the industry will also find this course fulfilling and inspiring as they embark on the exciting journey to expertise in the building and construction industry. So why wait? Start this course now!

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