Types of Formwork (Shuttering) for Concrete Construction: Timber Formwork: Timber for formwork should satisfy the following requirement: It should be well seasoned light in weight easily workable with nails without splitting free from loose knots Timber used for shuttering for exposed concrete...
Showing posts with label building metrials. Show all posts
Showing posts with label building metrials. Show all posts
Compressive Strength Definition
Compressive Strength Definition Compressive strength is the ability of material or structure to carry the loads on its surface without any crack or deflection. A material under compression tends to reduce the size, while in tension, size elongates. ...
Cement and History of cement
Cement A cement is a binder, a substance used in construction that sets and hardens and can bind other materials together. The most important types of cement are used as a component in the production of mortar in masonry, and of concrete, which is a combination of cement...
Lime Production
Lime Production When limestone (calcium carbonate) is heated, at about 1000 °C it undergoes thermal decomposition. It loses carbon dioxide and turns into quicklime (calcium oxide). The reaction is carried out in specially constructed lime kilns(a kiln is a high temperature oven). Limestone is added at the top and quicklime is removed from the bottom in a continuous process. Lime Cycle Lime Production ...
FACTORS AFFECTING CONCRETE ADMIXTURES PERFORMANCE
The various factors which affect the performance of concrete admixtures are: 1. Type of super-plasticizer: The admixture will be more effective if molecular weight of the super-plasticizer is high. 2. Dosage: The quantity of admixture should be optimum. Excess of admixture may...
What are the reasons of establishing minimum area of reinforcement and maximum area of reinforcement?
Beams may be designed to be larger than required for strength consideration owing to aesthetics or other reasons. As such, the corresponding steel ratio is very low and the moment capacity of pure concrete section based on the modulus of rupture is...
