Materials using mixed concrete.
1. Cement, cement used in construction must be a cement bag that contained the standard M.a.k. or stored in a cement manufacturer's packaging is not permitted for example, cement, cement deteriorate coagulation capture a chunk.
2. Sand, using sand mixed concrete must be fit by a resolution Fineness Modulus between 2.3 and 3.1 to 2.3 if less detailed manner to clean sand or dust is not too much junk associate.
3. We use plain rude and small stones and gravel and a rude mass. Depending on the difficulty in finding material easy. Engineers are usually described in terms that apply to any The tasks must wait for the material to always because they may not regularly. Materials from the same source. And may be a strange thing as rock or stone decay other than with quality.
4. The water requirements must be able to use clean drinking water. Which most often refers to water. If you are unable to find clean water. Require clear water in mixing concrete. To make clear before the fine. The cement may be used 1 liter per 200 liters of water mud mixed with 5 minutes left until the silt settle out. However, water must be tested before the other features used. 5. Some requirements specified mixture to add some substance such as chemicals seep กัน spreading restrain bubbles and put substance to form a substance accelerating the tasks must be added to see if mixture used must match. type was Approved by responsible engineers. Mixing concrete In small construction projects. May make the mixed concrete construction. May be mixed by hand. Or concrete mixer. If using a concrete mixer with a capacity of less than 1 cubic meter or take at least 1.5 minutes long, mixed and added to the mixed phase every 15 seconds to increase the capacity of 0.5 cubic meters of material put before the dry mixture and mix. dry materials. Then enter the water gradually to approximately 10% in mixed The materials and the remaining water gradually Other regularly, and put 10 percent last gradually fill material to enter the mix after all. The mixer rotation speeds consistent according to the manufacturer set the fastest rates of mixing concrete. It will take many slug. This allows the mix should be discrepancies Kaba stone measuring sand.
Successful mixed concrete (Ready Mixed Concrete).
Major road construction which is good enough for truck access. The construction of concrete mix is often used because they want to quickly send at once. Quality control can be fixed with concrete to make certain that quality. Free area and pile material such as sand, cement and stone water. In addition, the percentage loss in the concrete mix during transport. And only small decrease. Entire building is clean, not sloppy. What a job either a control should not neglect is not considered ready-mix concrete, must always good to know because if the lack of building contractor concrete technology. It may be the wrong order, as the case of delays in transportation. When the concrete to construction to show that water evaporates very concrete relentless. May only work in the mill, mixed with water to be blind to the situation that will cause the concrete. Are low in some cases to volume, such as plaster base large Which requires the Local Mix Concrete Plant If multiple communications media, or not well defined. May cause misunderstanding. Case has occurred. Concrete submitted a maximum compressed capacity (Crushing Strength) and cause the same damage. Especially if not carefully controlled enough. Not reviewed. Let the sand and are a combination of different quality into. Will cause doubt in the quality of concrete. Must be proven. Finally, may conclude that knocking out all This is a waste of time and money. So in this case, the tasks must be attentive.
Outstanding features of the concrete mix.
1. Raw materials used in the production of quality concrete construction standards.
2. The control portion of the concrete mix. By weigh concrete mix to make a correct and consistent course.
3. Ready-mix concrete plants have been developed from advances in technology. Concrete and can produce from 30 -150 Lb.m. / time scale. Can do to help the sand quickly. And reduce the number of workers in the mixed concrete and cement significantly.
4. To construction problems that have limited construction area. Can not be stored or mound of sand in construction work to change the location of sand all the time like the canal road.
5. To issue a construction volume of concrete to use more time, or to use a concrete time scattered, not worthwhile to invest in the stored material mixed use.
6. In the construction of relatively slow rate bond can be solved by skill mix concrete fill to extend the duration of a feature of the concrete form.
7. The concrete mix will be more expensive. Own concrete mix in a little. But can replace with good quality and consistency of concrete. And, importantly, save time in construction.
8. Is a manufacturer of concrete mix to ensure the quality of the concrete mix. Completed delivery to the agency under the construction conditions are such as compressed Pralai. The sink.
Suggestions to use ready-mix concrete.
1. To the fresh concrete. Distance from the plant construction should not exceed 15 kilometers.
2. Car to reach concrete unit easily. Road construction to agencies must be not less than 3 meters wide cable or phone lines that hinder other side should be higher from the floor, no less than 4 meters.
3. If the vehicle mix concrete, will not reach the area. Kaba size should provide capacity to support concrete Lb.m. 0.5-1.0.
4. To do a performance bond and continued agency should order Concrete volume in the right way to work.
5. To concrete quality, concrete should be used up within 1 hour after the car came to mix concrete unit.
6. To facilitate the delivery of concrete plot should show the location of the rear unit. Create detailed Send to a ready-mix concrete plant prior to start using.
Ref : http:www.civilclub.net
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