precaution during batching of concrete

Batching, Mixing, Placing and Compaction of Concrete

Batching is the process of measuring concrete mix ingredients either by volume or by mass and introducing them into the mixture. Traditionally batching is done by volume but most specifications require that batching be done by mass rather than volume. Percentage of accuracy for measurement of concrete materials as follows.When the quantity of cement to be batched exceeds 30% of scale capacity, the measuring accuracy should be within 1% of required mass. If measuring quantity is less than 30%

Learn More

What precautions should we take when casting slabs? - Quora

2017/08/03 · Precautions should be taken while casting slabs :- * We Ensure that the position of the cover blocks is intact and not disturbed during concreting operations. * In case concrete is made at the site, closely supervise proper batching

Learn More

Precautions of Concreting | Concrete Technology

2017/12/18 · The concrete should be placed quickly and the top surface of the concrete be covered with an insulating material. 3. Before placing any concrete, all ice, snow and frost should be removed from the form work and reinforcement etc., and the temperature be raised as close as practicable to the temperature of the fresh concrete to be placed.

Learn More

What are the precaution to be taken in a mass concrete work

2014/03/19 · Rajeev Kumar: To avoid shrinkage cracks in mass concrete, try to cast concrete in the evening or night and also avoid direct sun light and high temperature. Sprinkle water after the initial setting time but even then, impression on

Learn More

Mixing and Transporting Concrete

This site will define, analyze, and demonstrate the importance of each in the overall process of placing concrete. 2.0 Batching and Mixing Concrete. Mixing 

Learn More

What Precautions Should You Take When Pouring Concrete

2012年1月4日 — The aggregates in the mix can be heated, or you can heat the mixing water added to the cement. When heating water, the water temperature 

Learn More

Precautions for Cold-Weather Concreting - NPCA

• Monitor and record concrete temperatures during curing. Most important cold-weather considerations. Among the most important cold-weather production considerations are the following: • Concrete must attain a compressive strength of 500 psi or greater and must be protected from freezing until this minimum strength level is met.

Learn More

Safe operating procedure - Concrete mixer

CONCRETE MIXER. DO NOT use this machine unless a teacher has instructed you in its safe use and Safety glasses must be worn at all times in work areas.

Learn More

10 PRECAUTIONS TO BE TAKEN DURING PLACING OF

2015/08/06 · Following precautions should be taken during placing of concrete. The formwork or the surface which is to receive the fresh concrete should be properly cleaned, prepared and well watered. It is desirable to deposit concrete as near as practicable to its final position. The large quantities of concrete should not be deposited at a time.

Learn More

WHAT TO CHECK WHILE CASTING SLABS?

Checking of Concrete Slabs Ensure that the position of the cover blocks is intact and not disturbed during concreting operations. In case concrete is made at the site, closely supervise proper batching of ingredients, the water content, and the mixing and testing of fresh concrete. Make sure the beams are first cast in layers and []

Learn More

Inquiry