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

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

Flood Routing by Reservoir | Various flood routing Strategies

Flood Routing by Reservoir Safety Inspection of Dams The dams are national property – constructed for the development of the national economy and in which large investments and other resources have been deployed. The safety of the dam is a very important aspect for safeguarding the national investment and the benefits derived by the nation … Read more

Pavement Design (with examples) | Complete Data

pavement purpose

Pavement Design (with examples) Outline Pavement Purpose Pavement Significance Pavement Condition Pavement Types Flexible Rigid Pavement Design Example Pavement Purpose Load support Smoothness Drainage Pavement Significance How much pavement? –        3.97 million Centerline miles in U.S. –        2.5 million miles (63%) are paved –        8.30 million lane-miles total –        Largest single use of HMA and … Read more