Pumped concrete is the concrete which is transported to heights by means of pumping using concrete pumps. This method is used where large quantity of concrete work is involved at greater height, where other means of transporting is not easy to do. Concrete pumps have been known for more than 50 years. In modern times,(…)
There are various types of concrete for different purpose. Information on roller compacted, magnesium phosphate, polymer cement, green concrete, sulphate resistant, cold weather, self compacting concrete is provided.
No-fines concrete is a concrete from which the fine aggregate fraction has been omitted. This concrete is made up of only coarse aggregate, cement and water.
Mix design proportioning methods for Roller Compacted Concrete RCC: Mix design proportioning methods for no slump concrete applicable for Roller Compacted Concrete. Materials Used in RCC mix design a) Cementitious materials: Cement content is generally low (typically 70 to 130 kg/m3). Any kind of Portland Cement (but low heat cement is a preferred type when(…)
Damp proof course (DPC) is a barrier of impervious material built into a wall or pier to prevent moisture from moving to any part of the building. Following are the materials generally used for damp proofing of structures: 1) Flexible Materials: The materials, which do not crack and deform their shape when subjected to loading,(…)
Types of concrete with applications for different structural components like beams, columns, slabs, foundations are explained here. Special concrete with uses.
Water-cement ratio is detrimental for concrete. We always try to restrict the water-cement ratio in order to achieve higher strength. The chemical reaction of cement with water requires a water-cement ratio of less than 0.38, whereas the adopted water-cement ratio is much more than that mainly because of the requirement of workability. Workability is also(…)
Aerated concrete is made by introducing air or gas into a slurry composed of Portland cement or lime and finely crushed siliceous filler so that when the mix sets and hardens, a uniformly cellular structure is formed. Though it is called aerated concrete it is really not a concrete in the correct sense of the(…)
Applications of Reinforced Concrete is mainly due to its versatility, adaptability and resistance to fire and corrosion resulting in negligible maintenance costs.