Types & Functions Of Bearings for Bridges

Pin Bearing

Types & Functions Of Bearings for Bridges Function Of Bearings Bridge bearings are used to transfer forces from the superstructure to the substructure, allowing the following types of movements of the superstructure: Translation movements; are displacements in vertical and horizontal directions due to in-plane or out-of-plane forces like wind and self weight. Rotational movements; cause … Read more

What are the Selection Criteria for Bridge Site?

Selection Criteria For Bridge Site

Selection Criteria For Bridge Site The choice of the right site is a crucial decision in the planning and designing of a bridge. It may not be possible always to have a wide choice of sites for a bridge. This is particularly so in case of bridges in urban areas and flyovers. For river bridges … Read more

Steps Involved in Mix Proportioning as per IS 10262:2009 (with solved example)

Mix Proportioning as per IS 10262:2009

Steps Involved in Mix Proportioning as per IS 10262:2009 (with solved example)   General Steps Involved in Mix Proportioning Step 1. Choice of Slump Stiffest possible consistency that can be easily placed and compacted without segregation Pumping are typically designed for 100 mm to 150 mm slump Step 2. Choice of Max. Size of Aggregate … Read more

Factors affecting the choice of mix proportions

Factors affecting the choice of mix proportions

Factors affecting the choice of mix proportions   Factors affecting the choice of mix proportions Compressive strength Workability Durability Maximum nominal size of aggregate Fineness Modulus and zone of aggregate Quality Control Significance of Max. w/c Ratio & Min. Cement Content Water Cement Ratio Strength Criteria Durability Criteria Durability decreases with increase in w/c ratio … Read more

IS Codes Used In Mix Proportioning & their Uses

IS Codes Used In Mix Proportioning IS 456 : 2000 Code of Practice for Plain & Reinforced Concrete Exposure Conditions Table 5 – Minimum Cement Content & Max. w/c ratio IS 10262: 2009 Mix Proportioning – Guidelines Table 1 – Standard Deviation Table 2 – Max. Water Content Table 3 – Vol. fraction of Coarse … Read more

General Considerations for Workability of Concrete

workability of concrete

General Considerations for Workability of Concrete Workability Workability represents consistency & cohesiveness of concrete General Considerations for Workability Water content The higher the water content, the higher will be the fluidity of concrete, which is one of the important factors affecting workability. a/c Ratio The higher the aggregate/cement ratio, the leaner is the concrete In … Read more

Various Strands of Mix Designing, Significance & Specific Principles

Specific Principles

Mix Proportioning & Strands of Mix Design Mix Proportioning Concrete Mix Proportioning is the science of deciding relative proportions of ingredients of concrete, to achieve the desired properties in the most economical way. Strands Of Proportioning Absolute Volume Methods IS Method ACI Method Road Note No. 4 Method DOE Method Weight Methods USBR Method Trial … Read more

Concrete as a Structural Material | Advantages | Types

Concrete Material

Concrete as a Structural Material Concrete Concrete is an artificial conglomerate stone made essentially of Portland cement, water, and aggregates. It is a Composite material that consists essentially of a binding medium within which aggregates are embedded Binder is formed from a mixture of hydraulic cement and water. Concrete as a Structural Material Most widely … Read more

Green Buildings for Quality Living | Merits | Criteria

Green Building

Green Buildings for Quality Living Introduction Green buildings are eco-friendly, resource efficient and are very energy efficient and are designed and commissioned to ensure they are healthy for its occupants. They are more comfortable and easier to live with due to low operating and owning costs. Merits Lower operating costs (by 30%- 40%) Improve occupant … Read more