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What are the effects of non potable water on concrete quality?
Non potable water can chemicals such as Chlorides, Sulfates and Alkalies which can chemically attack the concrete.
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.
Is wet concrete heavier then dry concrete?
Concrete is made of a mixture of cement, aggregate (small stones), fine aggregate (sand), water and other chemical additives. When mixed the wet concrete will remain so for Most people assume that set concrete has no water in it, this is not so, as the water content helps bond the aggregates and cement, this process is known as Hydration. Concrete with no water in it would crumble to dust. Adding more water to the mix will make a concrete that is easier to work, while less water will produce a stronger, more durable concrete. After initial setting of the concrete, a slow amount of water loss is expected due to the concrete drying, it can take anything up to a year for water to stop evaporating slowly out of the concrete. So for this reason the answer to your question is yes, dry, set concrete will weigh less than wet concrete, but for anything up to a year it will keep getting lighter, due to waterloss.
What is added to cement to make concrete?
You would have: 1 part cement 5 parts of Ballast (Sand, gravel mix) And then add water till you get the disired mix quality
Will Water damage concrete?
Not generally. If the concrete has a sealent on it no, but if you have a massive amount of water on unsealed concrete, the concrete will absorb the water and can make it swell and possibly crack. Answer The answer given above is totally incorrect. As far as only concrete is concerned i.e. plain concrete, the effect of water seepage is very little (depending upon the grade of concrete) whereas for RCC (reinforced cement concrete) water that seeps in corrodes the reinforcement and thus reduces the life of the structure. The defects that water seepage induces in concrete are as follows: 1) induces capillary formation (due tothe detiorating characteristics of water) 2) With this capillaries the concrete starts spalling out i.e the places where capillaries are formed, with even slight amount of stress that portion comes out and exposes the steel to the atmosphere 3) Concrete has a pH of about 12 -13. Thus it also reduces the pH of the concrete when salty water or when the concrete is exposed to marshy areas. 4) Reduces the overall strength of concrete 5) Reduces durability 6) Reduces permeabitlity to further water seepage 7) Results in ageing of structures
What effect has the quantity of mixing water have upon the quality of concrete?
the strength of concrete is effected by water /cement ratio as the water/cement ratio increases the strength of the concrete decreases
What are the effects of non potable water on concrete quality?
Non potable water can chemicals such as Chlorides, Sulfates and Alkalies which can chemically attack the concrete.
What are the effects of non-potable water on concrete quality?
Non potable water can chemicals such as Chlorides, Sulfates and Alkalies which can chemically attack the concrete.
What can effect the strength of concrete?
The water/concrete ratio, not mixing it well enough, quality of raw materials, the age of the concrete, and the temperature and humidity of the area surrounding the concrete.
PH of water for making concrete?
The pH of water used in concrete mixing should ideally be between 6 to 8. Water with a pH outside of this range can affect the setting time and strength development of concrete. It is important to use clean water with the appropriate pH to ensure the quality and durability of the concrete.
What is the ratio for vdf flooring?
The Vacuum Dewatered Flooring or VDF Flooring is a system for laying high quality concrete floors where the key is Dewatering of Concrete by Vacuum Process wherein surplus water from the concrete is removed immediately after placing and vibration, thereby reducing the water: cement ratio to the optimum level.
How much time take to set the concrete?
Rockbottom period is 7 days once quality concreting is done and meticulous watering the concrete , otherwise normally 21 days is recokened as the period for curing the concrete( that is, setting the concrete) to take care of failure to adhere to correct processing of laying concrete and curing with water .
What has the author American Concrete Institute written?
American Concrete Institute. has written: 'Guide for concrete inspection' -- subject(s): Concrete, Quality control, Inspection
What has the author Ralph P Andrew written?
Ralph P. Andrew has written: 'Proceedings of a Symposium of Concrete Quality, London, November 1964' -- subject(s): Concrete, Concrete construction, Congresses, Quality control
What are the advantage of precast concrete?
Quality control would be high on the list, for concrete may be made with minimum water under factory conditions. Concrete pipes for example are made from aggregate that appears only slightly damp! - But with steam curing, a quality product results. Accurate, repeatable products are another advantage. And factory manufacture produces the quality product at good speed. Freedom from weather and site conditions would be another.
What happens to concrete if it is soaked in salt water?
Concrete is corroded by salted water.
What is pavement quality concrete used in cocrete roads?
it is durable and hard thats why concrete pavement is used
