Concrete Technology

Circular Column Design

Circular reinforced columns have higher strength than square or rectangular columns. Circular cross-section columns are more resistant to buckling as compared to a rectangular cross-section. Furthermore, circular sections will have uniform torsion characteristics. circular column design spreadsheet example The difference between the strength of two different types of columns: Columns having shear reinforcement in form of spirals gives better …

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Concrete Mix – Download Spreadsheet to Estimate Quantities of cement, sand, stone

To make concrete there are four basic materials you need: portland cement, sand, aggregate (stone), and water. The ratio of aggregate to sand to cement is an important factor in determining the compressive strength of the concrete mixture. The mixing process is the fact that the better you mix the concrete, the stronger it will …

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3 Types of Concrete Joints in Building Structures

Concrete joints are used to compensate when concrete expands or shrinks with changes in temperature. Concrete joints are normally used to prevent cracks when the concrete shrinks, by creating forming, tooling, sawing and placing joint formers. The pre-planned cracks will provide a better finish concrete product and will be formed in specific locations where those …

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Specification for Transporting and Placing Concrete

Concrete drop during vertical placement shall not exceed 2.5m. For heights greater than 2.5m, the Contractor shall pour concrete through enclose chutes or access hatches, details of which shall be approved by the Engineer. This must comply with four main requirements, namely: It must be rapid so that the concrete does not dry out, lose …

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