Fabrication of a Reinforced Concrete Beam Lab Report

Fabrication of a Reinforced Concrete Beam - Lab Report ExampleThirdly this gives sufficient space for the master(prenominal) reinforcement to develop full stressing and strength, which consequently prevents slipping of the meters. Lastly a sufficient cover gives a smooth lift which improves the aesthetics of the component as well. 3. 4. Bar codes are on the schedule so that the reader must understand that how the steel bar is is to be bended and what angles and shapes are to be made. In addition to this the reader butt joint easily calculate the length of the bar, and consequently by using the diameter and the type of bar the total weight of the bar can be calculated and finally the total weight of the reinforcement. 5. The cover can be maintained by different methods. One method can be made by placing Metal plastic tipped bar chairs under the reinforcement so that a specified height can be maintained between the bottom surface and reinforcement. Then another method is to give sp acer blocks, these can be small marble pieces or concrete plates. some other method used for very heavy reinforcement is the employment of Plastic strip bar chairs. 6. a) coarse aggregative = 122.4 Kg b) fine aggregate = 81.6 Kg c) cement = 40 Kg d) water = 22 Kg 7. Water cement ratio of the concrete is (weight of water / weight of cement ) is w/c = 22/40 = 0.55 SSD or saturated surface dry is a condition of the aggregate when all the surface pores of aggregate are fully fill up and there is no excess water on its surface. In addition no more water leave be absorbed by the aggregate when immersed in water. This aspect is important because if the aggregate is not saturated then it will start absorbing the water of the concrete which was supposed to be consumed in the hydration of the concrete. If there is less water in the concrete than required the concrete will not acquire the desired strength and the concrete will fork up microscopic cracks further weakening the concrete and this will also disturb the desired water cement ratio. Then this state helps in finding the ducking value of aggregates and also the specific gravity of aggregate. Lastly the aggregate must be saturated surface dry as the dry surface will help and ensure a good bond between the concrete and aggregate. 8. A clean beam form is important because presence of any secrete material will attach on the surface of the beam and when the beam is subjected to bending the concrete around this loose material and the loose material it ego will spall off. Hence the cover would be compromised and there is a chance that the steel reinforced will be naked and prone to purlieu resulting into its rusting and corrosion. 9. The indication of completion of the compaction is that the firstly there is no decrease/ decay in volume or height of the concrete and the gallery of aggregates due to vibration in the concrete will very low. In addition the final indication is that the water will come on the surfa ce of the concrete and it must be noted that as soon as the water film appears on the surface of the concrete the vibrator must be pulled unwrap of the concrete or else the concrete will segregate, resulting into separation of cement paste and aggregate. 10. The compaction of concrete is very important for its acquisition of desired strength, In event compaction is the process in which the entrapped air is released from the