Chemical prestressing, Civil Engineering

Assignment Help:

Chemical prestressing

In prestressed concrete, normally tendons are stretched and are retained in a stretched condition by concrete. Consequently, concrete comes under compression. In the method of chemical prestressing or self-stressing, special types of cements, called 'Expanding cements', are used in concrete. A typical expanding cement may consist of around 75% Portland cement, 15% High-alumina cement and 10% gypsum. Using this cement, a linear expansion of around 3-4% may be achieved in concrete. When concrete expands, the tendons also expand in length and tensile prestresses are introduced in tendons. These tensile stresses are transferred to concrete in the form of compressive stresses. 


Related Discussions:- Chemical prestressing

Write short note on skv process of thermit welding, Q. Write short note on...

Q. Write short note on SKV  process of thermit welding? This term is used for welding by Alumino thermic process with short preheat time. The time required for preheat with pet

Remedial proposal to rectify situation, Question During deep excavatio...

Question During deep excavation , neighbouring ground water table is drawn down that might affect settlement of nearby buildings. What is remedial proposal to rectify situatio

Show the probable type of clay mineral, The liquid limit and plastic limit ...

The liquid limit and plastic limit of clay are 100% and 25%, respectively. From a hydrometer analysis it has been found that the clay soil having of 50% of particles smaller than 0

Assignment, I need to find support reactions at O for the beam with a distr...

I need to find support reactions at O for the beam with a distributed load, a 6 kN moment couple at A and a 3 kN axial load as shown in picture.

Define the both inside clearance and outside clearance, The inner diameters...

The inner diameters of a sampling tube and that of a cutting edge are 70 mm and 68 mm correspondingly, their outer diameters are 72 and 74 mm respectively. Verify the inside cle

Define Statically indeterminate structures, Statically indeterminate struct...

Statically indeterminate structures a. Fall into two categories: 1.  Beam problems with additional supports/restraints 2.  Axial bar members subjected to temperature/forc

Define emerging trends in bearings, Define Emerging Trends in Bearings? ...

Define Emerging Trends in Bearings? New innovations have taken place in the area of bridge bearings, notable among them are: (1) Shock Transmission Unit (STU) or Lock Up Dev

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd