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Concrete

This category contains 16 posts

Fly Ash in Civil Construction

It was an usual scorching summer day and I was to collect and despatch a few bags of fly ash for detailed testing in an off-site laboratory. It was an area where the mercury was habituated in fumbling around the 50┬ĄC mark, especially, during the pinnacle of the summer season. Sweating happily under the glaring … Continue reading

Shotcrete and Gunite

Shotcrete and gunite are important terminologies associated with the domain of civil construction. Shotcreting or guniting are techniques or processes that have proven to be of immense benefit in diverse subdomains of construction such as slope protection or stabilisation, pools, tunnels, fluid tanks, concrete repair works and many more. Many of us, including this author, … Continue reading

Prestressing of Concrete

Prestressing of concrete is a technique commonly adopted in diverse construction work in order to render concrete members or structures stronger, smaller in sections and thus lighter in weight, more economical as compared to ordinary reinforced concrete members. There are also a host of other benefit that come as a package with prestressed concrete. This … Continue reading

Joints in Concrete Structures – Part III

Contnd. from Part II ….. Construction joints and expansion joints (aka movement joints) were discussed in Part-I & II respectively. Isolation joints and contraction joints are discussed in this post. Isolation joint : In concrete structures isolation joints are provided in order to relieve the stresses developed due to differential movement of the adjacent members … Continue reading

Joints in Concrete Structures – Part II

Contnd. from Part I ….. Construction joint was discussed in Part – I. Discussion on the other three types ie, expansion joint, isolation joint and contraction joint is continued in Part – II & III. Expansion joint : Concrete structural members such as slabs, pavement, walls etc expand in hot environment. For members of smaller … Continue reading

Joints in Concrete Structures – Part I

Joints are usually part and parcel of structures made up of concrete, steel, masonry etc. Concrete structures usually call for a varieties of joints. The most commonly experienced among them are a) Construction joint b) Expansion joint c) Contraction joint and d) Isolation joint. Of these, expansion joint and isolation joint are sometimes found to … Continue reading

Concreting in Cold Weather

Hot weather concreting was discussed already in a couple of earlier posts. Like concreting in hot weather, concreting in cold weather too calls for special care. A brief discussion on the same finds place herein. When the temperature of a concrete mix is quit low the rate of setting or gaining strength for the concrete … Continue reading

Hot Weather Concreting – Part II

Contd. from Part I ….. ( https://civilconstructionresourcez.wordpress.com/2012/03/21/hot-weather-concreting-part-i ) In Part-I, definitions of hot weather concreting and a few typical problems associated with such concreting were discussed. In this post some useful measures that need to be taken in order to perform concreting in hot weather condition without compromising important quality parameters such as workability, strength, … Continue reading

Hot Weather Concreting – Part I

With the onset of summer in india and many parts of the globe construction personnel will need to take extra care or additional measures when it comes to concreting. In fact, some parts of the world remain hot throughout the year. These are situations when paying attention to a few simple yet very necessary points … Continue reading

Admixtures for concrete, Part – I

Admixtures are substances added to concrete mixes in order to modify one or more properties of the mixes to render them suitable for specific needs or requirements. For example, if a concrete mix is to be rendered suitable for easy pouring and compacting in a structure congested with reinforcement, an admixture that enhances workability is … Continue reading