What is concrete consistency strength?
consistency of concrete changes from stiff to very fluid. The. maximum values of compressive strength are realized when. the degree of filling of the cavities in the aggregate that can. be considered as optimal is within the relatively narrow.
What is the constant of cement?
Every time we calculate the concrete or cement mortar calculation, We use a 1.54 constant to get a dry volume of ingredients.
What is void ratio of cement?
25% to 32%
The void ratio is to be found in range of 25% to 32%, which is sufficient for pervious concrete. Similarly, permeability of pervious concrete decrease using small size of aggregate. Based on study it was found that with using 0.3 w/c ratio and Mix (50%) aggregate gives better result for pervious concrete.
What are the quality parameters for cement?
Cement Quality Parameters Cement has a light grey color; in case there is a change of colour it should be rejected. Cement should be smooth while rubbing. A coarse texture indicates adulteration with sand. When one puts his hand in the cement bag it should feel cool.
What is the standard consistency?
Consistency is referred to as the ability by a flow of a freshly mixed cement paste or mortar. The consistency of cement is also called as a standard consistency or normal consistency. This is the minimum quantity of water required to initiate the chemical reaction between water and cement content.
What consistency is normal?
The normal consistency or standard consistency of a cement is defined as that consistency which will permit the Vicat plunger of 10 mm diameter to penetrate to a point 5 mm to 7 mm from the bottom of the Vicat mould when the cement paste is tested as described in procedure.
What is the difference between PCC and RCC?
The main difference between PCC and RCC is that RCC contains steel rods or reinforcement within it but PCC does not contain reinforcement within it. So, RCC can bear the maximum tensile load on it.
What is void ratio of aggregate?
In soil mechanics, the void ratio describes the relationship between the volume of voids, or spaces, in the soil or aggregate to the volume of solid constituents, or grains. Algebraically, e = Vv /Vs, where e represents the void ratio, Vv represents the volume of voids and Vs represent the volume of solid grains.
Is standard consistency 4031?
Definition of Consistency: Consistency is the percentage of water required to the cement to penetrate the VICAT plunger to a point 5 mm to 7 mm from the bottom of the VICAT mould.
What is consistency of cement and how it is tested?
The standard consistency of cement is that consistency, which permit the vicat plunger to penetrate to a point 5 to 7mm from the bottom of the vicat mould when tested. Procedure to determine the quantity of water required to produce a cement paste of standard consistency is described below.