Chemical prestressing, Civil Engineering

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. 

Posted Date: 10/4/2013 2:46:57 AM | Location : United States

Related Discussions:- Chemical prestressing, Assignment Help, Ask Question on Chemical prestressing, Get Answer, Expert's Help, Chemical prestressing Discussions

Write discussion on Chemical prestressing
Your posts are moderated
Related Questions
definition for double type scaffolding

cross section diagram of urban roan in embankment,in cut,in eight lane,in conjusted area,divided hihgway

Question What are the major functions of following features observed in a typical manhole ? Answer (i) Groove near benching, (ii) R.S.J. (iii) double seal manhole cove

Question What is key function of packing resources in joint of concrete pipes in pipe jacking ? Answer Packing resources are about 10 to 20mm broad and are usually mad

Q. Explain Remote sensing technique? Remote sensing is a science or an art of obtaining the information about an object, area or a phenomenon through analysis of data acquired

Question While designing water storage tank , has movement joints be installed? Answer While designing water storage tanks , group joints can be set up in similar w

Define Problems in turbid water - underwater inspection of bridge? There are three main problems, which limit the viewing performance of an underwater camera. These are: -

Explain Designation of bearings. Calculate included angle from bearings

cold driven rivet