The chemical action between cement and water, which results in the setting and hardening of concrete, is dependent on the presence of water. Although there is normally a sufficient quantity of water for full hydration when the concrete or mortar mix is prepared, it is important to ensure that the…
Bulk Cement – Storage and Transportation
The storage of bulk cement is an essential link in the cement processing industry. There are many ways to store cement, but the best way for long term storage is by using cement silos. The cement silos have the characteristics of good uniformity in the cement storage section. With the…
Cement – Storage and Transportation
Ordinary Portland Cement is a very finely ground chemical. It is hygroscopic in nature and therefore it can easily absorb moisture from the air. Cement should therefore be protected from dampness and high humidity as it can rapidly lose its strength and get transformed into lumps rendering it unsuitable for…
Honeycombs in Concrete – Its Causes and Remedies
Honeycombs are hollow spaces and cavities are left in concrete mass on the surface or inside the mass where concrete could not reach. These look like honey bees nest. Improper vibration and workability of concrete are the main causes of honeycombs in concrete. Honeycombs that are on sides are visible…
Segregation of Concrete – Causes, and Prevention
Segregation of concrete is the separation of cement paste & aggregates of concrete from each other during handling and placement. Segregation also occurs due to over-vibration or over compaction of concrete, in which cement paste comes to the top and aggregates settle at the bottom. Segregation of concrete affects strength…
Civil Engineering Interview Questions and Answers
The most important part of preparing for an interview for a job is to be aware of what kind of civil engineering interview questions might be thrown in your direction. That way, you will be in a great position to prepare your answer well in advance and feel confident that…
Atal Tunnel – World’s Longest Highway Tunnel
Atal Tunnel is a highway tunnel built under the Rohtang Pass in the eastern Pir Panjal Range of the Himalayas on the Leh-Manali highway in Himachal Pradesh, India. At 9.02 km length, it is the longest tunnel above 10,000 feet (3,048 m) in the world and is named after former…
Engineering Benefits of GGBS in Concrete
The significance of Ground Granulated Blast Furnace Slag (GGBS) lies in its greener way to become a substitute in concrete material. GGBS being a waste material, it needs a proper method for disposal. So incorporating this waste material of iron in concrete can reduce the depletion of conventional concrete components…
What is GGBS? Its Advantages and Disadvantages
What is Ground Granulated Blast Furnace Slag (GGBS)? The ground granulated blast furnace slag (GGBS) is a by-product of iron manufacturing which when added to concrete improves its properties such as workability, strength, and durability. This material is obtained by the heating of the iron ore, limestone, and coke at…
Chemical Properties and Physical Properties of Silica Fume
Silica fume, also known as microsilica, is an extremely fine non-crystalline polymorph of silica and is produced in electric arc furnace (EAFs) as a byproduct of silicon and ferrosilicon alloy production. While the first trials of silica fume as an additive in concrete were in the 1950s, at that time…
