Fracture critical bridge inspection

Pack Rust

Cross section loss of a steel girder due to pack rust corrosion is another defect that can be found in an FC bridge inspection. The pack rust occurs between two mating surfaces and is a volume of rust formed over the original steel. The pack rust may create localized distortion, and possibly cracking and loss of cross section.

Modern Mapping of Conditions

One of the most recently developed pieces of GPR equipment emerging in today’s market is the multi-array (fitted with multiple antennae) bridge inspection unit (BIU). Although typically linked to bridge inspections, this device can map the arrangement and condition of any horizontal structure, providing specific information on reinforcement cover depth, delamination, voiding, and relative moisture content. Its use does not have to be limited to concrete either. The technology allows for scanning through asphalt and other masonry types, such as brick and stone pavers; however, it was specifically developed with structural health assessments in mind.

The Difference Between Curing and Drying Concrete

The terms curing and drying are frequently used interchangeably with regard to the moisture condition of new concrete slabs. The following definitions clarify these terms.

Why would an inclined column be designed any differently than a vertical column?

Why would an inclined column be designed any differently than a vertical column? 

If it is a gravity column then it is pinned-pinned and has essentially axial load only. It would obviously throw some additional lateral load on the lateral system, but that's not of concern for the design of the actual inclined column (again, assuming it is a gravity column). If it is a lateral column, again, why would the design be any different?

Diagonal cracking in wall pier masonry

Diagonal cracking in wall pier masonry is typical damage of shear seismic forces. It's different if cracks appear in wall pier masonry or in sill masonry:

Construction of Arch Bridge

 

Construction of Arch Bridge

How tower cranes erected themselves

Ever wonder how cranes that build high-rise buildings get built? 
They can build themselves upwards!

Tunnel Excavation & Methods of Construction

Tunnel Excavation & Methods of Construction

How to use casing in borehole for pile foundation

This construction briefly explains how to apply casing in bore hole for pile foundation. Here Length of Casing points to 5m and usefully it is maintained among 5 to 10m. In order to set exact position of casing, it is most suitably to assign 2 point from the reference of center point of casing and get the equivalent distance of both the points from that reference point. When the casting will be put into bore hole, the distance will be calculated from both points to casting for maintaining the perfectness.

Bad behavior and unsafe condition place

Bad behavior and unsafe condition place

Useful of slump test on concrete

Purpose of Test:
Slump test is initiated to evaluate the conformity of concrete mix. Generally it is undertaken to verify either the adaptability of concrete mix is up to the standard or not.

Tools Utilized:

Slab analysis using hand methods

For 1.00 m wide slab strip:
Self-weight: go=0.15m×1.00m×25.00 kN/m3= 3.75 kN/m, Covering load: ge=1.00 kN/m (given),

Usefulness of construction formulas and equations for building projects

The formulas & equations are essential for construction professionals to work out the quantities as well as cost & subtotals of building material. These formulas can be used in a wide array of construction projects and design applications which range from reinforced concrete, bridge construction, highway design etc.