7 Factors that Affect the Workability of Concrete

Leave a Comment / Concrete Technology / March 3, 2020

By Definition, Workability means the property of the concrete, which measures how easily a concrete can be mixed, transported, placed, compacted and finished. In other words, it indicates the degree of plasticity. The word ‘workability’ assumes the full significance of the type of work, the thickness of the section, the extent of reinforcement and mode of compaction.
For a concrete technologist, he/she should have a comprehensive knowledge of workability to design a mix. Workability is a parameter, a mix designer is required to specify in the mix design process, with a full understanding of the type of work, distance of transport, loss of slump, method of placing, and many other parameters involved. Assumption of right workability with proper understanding backed by experience will make the concreting operation economical and durable.

Magnetic Crack Detector as NDT Test of Concrete

Magnetic Crack Detector as NDT Test of Concrete

Leave a Comment / Building Construction, Concrete Technology, Lab Reports / January 3, 2020

Electroflux Magnetic Crack Detector equipment is designed for non-destructive testing (NDT Test) of ferrous iron and steel parts. Electroflux equipment will locate cracks and other defects in parts which can be magnetized. When properly used, Electroflux will locate such defects as fatigue cracks, heat cracks, grinding checks, forgings laps, shrinks and tears in castings, improper welds and inherent defects in metal such as seams and inclusions as well as cracks due to over stressing of parts. These defects may not be visible to the naked eye but can be located rapidly and accurately with this equipment.

Compaction Factor Test

Compacting Factor Test to Determine it’s Workability

Leave a Comment / Concrete Technology, Lab Reports / January 3, 2020

The compacting factor is defined as the ratio of the weight of partially compacted concrete to the weight of fully compacted concrete. It shall be stated to the nearest second decimal place. Compacting factor test is adopted to determine the workability of concrete where the nominal size of the aggregate does not exceed 40 mm. It is based on the definition, that workability is that property of concrete, which determines the amount of work required to produce full compaction. The test consists essentially of applying a standard amount of work to a standard quantity of concrete and measuring the resulting compaction.

How to Improve the Bearing Capacity of Soil

How to Improve the Bearing Capacity of Soil?

Leave a Comment / Building Construction, Geotechnical Engineering / December 7, 2019

The ultimate bearing power or ultimate bearing capacity of a soil is the minimum load per unit area, which causes failure to the soil. It is known that a load of any structure is finally transmitted to the soil lying below the foundation of the structure. Hence it is very essential to know the strength and behaviour of the underlying soil. Bearing capacity of the soil is its ability to support the load coming over it per unit area without causing excessive settlement and displacement.

Quantity analysis for Materials In 1 cu.m Cement Concrete

Quantity analysis for Materials In 1 cu.m Cement Concrete

Leave a Comment / Concrete Technology / November 22, 2019

Concrete is basically a heterogeneous mixture, which consists of cement, sand, stone aggregates and water. For a big project, where the higher grade of concrete is used, mix design is must to determine the quantities of the materials required to maintain the grade. But when a lesser grade of concrete is used, quantity analysis for Cement, Sand And Aggregate is done by some basic calculation.

Behavior of Cement Concrete Using Recycled Concrete Aggregates

Leave a Comment / Concrete Technology, Project & Presentation / November 8, 2019

The requirement of concrete aggregate in India is large. Corresponding to the current annual production of cement of 300 million tons, total requirement of coarse and fine aggregate for use in cement concrete, mortar and plasters of about 1500 metric tons per year is a safe estimate. There is difficulty in obtaining natural aggregates within economic distances. Search for alternate sources of aggregates thus assumes importance. One such alternative is recycled concrete aggregate derived from construction and demolition wastes, which allow conservation of natural resources and land.