0
exceed mixing and compacting
Webster Bednar
Add your answer:
Earn +20 pts
What are the Causes of bleeding in fresh concrete?
exceed mixing and compacting
What is bleeding in concrete?
Bleeding in concrete is sometimes referred as water gain. It is a particular form of segregation, in which some of the water from the concrete comes out to the surface of the concrete, being of the lowest specific gravity among all the ingredients of concrete. Bleeding is predominantly observed in a highly wet mix, badly proportioned and insufficiently mixed concrete. In thin members like roof slab or road slabs and when concrete is placed in sunny weather show excessive bleeding.Due to bleeding, water comes up and accumulates at the surface. Sometimes, along with this water, certain quantity of cement also comes to the surface. When the surface is worked up with the trowel, the aggregate goes down and the cement and water come up to the top surface. This formation of cement paste at the surface is known as "Laitance". In such a case, the top surface of slabs and pavements will not have good wearing quality. This laitance formed on roads produces dust in summer and mud in rainy season.
How can i avoid honeycombing in concrete?
By means of proper compactionBy adopting appropriate water-cement ratiosegregation and bleeding should be prevented
What is the effect of hydration on strength of a concrete?
Excess water (over hydration) causes weak concrete. The water in concrete is there to start a chemical process which results in the hardening process. The excess water is not used in the chemical process and results in a weakened concrete.
What is meant by Workability of Concrete?
In case of long haul involved in delivering ready-mixed concrete to the site of work, concrete is mixed intermittently to reduce the bad effect of continuous mixing. A pertinentpoint to note in this connection is that when the concrete is mixed or agitated from time to time with a short interval, the normal rule of initial setting time is not becoming applicable.The concrete that is kept in agitation, does not exactly follow the setting time rule as applicable to concrete kept in an unagitated and quiescent condition.workability is the ease and homogenity with which the concrete can be mixed , transported , poured , consolidated and finishedThe more the water cement ratio the more workable the concrete will be , but it does not mean that we should keep on increasing water cement ratio because it will decrease the strength and will cause bleeding and segregation of concrete 08ce69 quaid e awam university nawabshah
What are the Causes of bleeding in fresh concrete?
exceed mixing and compacting
What are the causes of bleeding when you purge?
The erosion of the esophagus is what causes the bleeding when you purge.
Where do you find information about the causes of bleeding diathesis?
Information about Bleeding Diathesis can be found on the wikipedia article which has reliable information and the causes. Some of the causes for bleeding diathesis are excessive bleeding and a lack of clotting.
What causes external bleeding?
Bleeding occurring outside the body.
Define vibration of concrete and its importance?
Vibration is a process by which fully compacted concrete is achived.Importance:Prevents honeycombingPrevents segregation and bleeding of concreteExpuls air from concrete.
What is intestinal bleeding What causes black pooh?
Intestinal bleeding may happen if someone has bleeding in their intestines. It can also happen in the stomach, which then causes black stool at times.
What are the causes of gastrointestinal bleeding?
There are many causes of gastrointestinal bleeding. They include colitis, which is inflammation of the bowel, as well as parasites and irritation.
What are the most common causes of bleeding gums?
Some of the most common causes of bleeding gums is lack of flossing and gingivitis.
What vitamin cause bleeding gum?
no vitamin causes bleed gum it is the deficiency sign that causes bleeding gum..
Definition segregation and bleeding concrete mixture?
The separation of constituents in a heterogeneous mixture creating a non-uniform distribution of concrete mixture.
What causes venous bleeding?
Bleeding from a vein. bleeding from the vein. usually a dark red slow bleed.
What causes bleeding in the digestive tract?
periods
