(1) RCC:Reinforced cement concrete. (2) PCC:Plain cement concrete
Introduction: Reinforced cement concrete consist on five type of materials such as cement ,aggregates, steel, sand and water. During preparation of concrete should need suitable tempreture.This suitable temperature is 18 degree centigrade to 21 degree centigrade. First of all we prepare the frame of structure according to given design. Second we lay the steel of frame and third we preparation of concrete.
Answer: First of all we check the specification of materials. Are they materials according to specification. Then we pile material on clean place. First we aggregates lay on place according to volume then add sand, cement and after that mix with water according to given ratio. We can also mixing by machine or hands. If we have a large work then concrete mix by machine otherwise we can mix by hand. At last passing after that process we require the concrete. Now concrete is ready to lay on the frame work. After a day we should do curing of concrete.
When the temperature fall into freezing point that time we use accelerators for quick setting of concrete. So concrete set on time and durable so as when the temperature will be very hot in summer season that time, the water of concrete hydrate before the setting of concrete. Such as it's strength will be reduce. Therefore, we use many type of retarders to achieve quality of strength. Some of retarders and accelerators are given under.
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| RCC WORK |
Q1.What is the procedure of preparation concrete?
Q1.What is the procedure of preparation concrete?
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| CONCRETE |
Q2. How we can achieve good strength of concrete?
Answer: We has achieve nearly 50 person strength concrete placing after 3 days from total days of 28.7 days after It has achieve 70 person strength. It has understood that 28 days after strength has been completed.
Q3.Why we use retarders and accelerators and give their names?
When the temperature fall into freezing point that time we use accelerators for quick setting of concrete. So concrete set on time and durable so as when the temperature will be very hot in summer season that time, the water of concrete hydrate before the setting of concrete. Such as it's strength will be reduce. Therefore, we use many type of retarders to achieve quality of strength. Some of retarders and accelerators are given under.Retarders Accelerators
1.LiquatNitrogen 1.Calshiamcloride 2. Carbonic Acid Gas 2. Potassium Carbonate
3.Lignosulfonic 3. Calcium Nitrate
4. Carbohydrate 4. Sodium Nitrate
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