How will trucks be checked on-site when receiving concrete?
Ticket Checked for Concrete Batching time and Slump Value at the plant.
Temperature Test (32 C maximum @ Site).
Min Concrete temp is 10 degree, and Max is 32 degrees
Cubes or 4 Cylinders should be taken per 50cum
Is concrete stronger with more cement ?
The strength of the concrete is inversely proportional to the water/cement ratio. In other words, the more water you use to mix the concrete, the weaker the concrete mix. The less water you use to mix the concrete, the stronger the concrete mix. … To make the concrete stronger, add more cement or less sand.
What is plasticizer ?
Usually applied at a low water-cement ratio concrete to make it workable.
A plasticizer is a substance that is added to a material to make it softer and more flexible, to increase its plasticity, to decrease its viscosity, or to decrease friction during its handling in manufacture.
What happens if you don’t add enough water to concrete ?
If there is too much water, the resulting concrete will be weak and will have poor surface qualities. If there is not enough water, the concrete will be hard to work into place. Concrete that is too dry on the left, and too wet on the right.
Max and min slope of chutes used in pouring concrete?
Max slope is 1:2 (Vertical to Horizontal), Min slope is 1:3
What are the reasons behind the cracks ?
Poor Curing Practice, Poor design, Poor Vibration which results in segregation, less rebar covering, poor quality of concrete, movement of falsework or forms, higher water-cement ratio, Severe atmospheric attack which shows the effect on the heat of hydration with water initially
What is a zero slump concrete ?
concrete of stiff or extremely dry consistency showing no measurable slump after removal of the slump cone. (See also slump and no-slump concrete.)