What are recommended practices when placing concrete?

What are recommended practices when placing concrete?

To provide durable concrete, it should be free of segregation and the mortar should be in close contact with the coarse aggregate, reinforcement, and any adjacent faces to which it is to be bonded. Concrete should be deposited, as nearly as practicable, in its final position.

What should I check before casting concrete?

Ensure that wooden pieces, paper, nails, etc. are removed from the beam before casting. Ensure that the shuttering, supporting, and the scaffolding are firm and proper. Ensure that all joints in the formwork are properly sealed.

What do you understand by placing of concrete?

Concrete placement is an important process in the construction that determine the success of the structure and its life. Technical and environmental conditions are taken into strict consideration while placing the concrete. The concrete is transported, poured, vibrated, matured, form removed and cured.

What should be paid attention to before and during concrete pouring?

Concrete Setting Time : It is required to pay attention to the initial and final setting times during the concrete pouring. In general, the initial setting time of concrete is around 45-60 minutes. However, it can be modified by adding admixtures.

What are the checks that must be carried out on reinforcement and formwork before placing concrete for a RC slab?

Checks for Fixing Reinforcements in Formworks of Concrete Structural Members

• Check for Formwork Condition.
• Checking Condition of Reinforcement.
• Checking Steel Bar Accuracy in Bending.
• Checking Installation of Services.
• Checking Joints and Dowel Bars.
• Check Reinforcement from Previous Works.

What is concrete placing and finishing?

The Essentials of Concrete Placing and Finishing A strike off or screeding is when the operator cuts off the excess concrete that protrudes from the slab in order to achieve the right grade. A finishing machine is used to float the concrete so that voids, humps, and imperfections are removed.

What is the main objective of concrete placing?

Controlling concrete placing and curing temperatures is the key to success. When developing a cold weather concreting plan, consider three primary objectives: protect the concrete from early-age freezing, protect to ensure adequate strength gain, and protect from thermal shock and cracking.

What is Post concrete inspection?

Post concrete inspection involves both eye inspection and testing of concrete to achieve its goals. The post concrete inspection of buildings may be conducted by site engineer or foreman. The report produced would serve as a guide for site engineer to repair defects prior to full acceptance of the structure.

What is a pre pour inspection?

A pre-pour inspection is basically a visual inspection of the bare bones of the home, before the concrete slab is poured. We inspect the form boards, post tension cables, rebar, plumbing, and more.

What is poured concrete construction?

Site-poured concrete is building material that is poured, molded, and cured onsite. Pouring concrete onsite is a common practice in trenchless construction. Site-poured concrete is also known as in-situ concrete or cast-in-place concrete.

What are the precautions for the placement of concrete?

Concrete must be placed on the formwork as early as possible. #9. During placement of the concrete, it should be seen that all edges and corners of concrete surface remains continuous, sharp and straight in line. #10. The placement of concrete should be carried out constantly between construction joints.

What are the prior checks of The Concretes?

The prior checks of the concretes should be carried out just before placing the concrete. Temperature check and slump test are two such tests to be performed.

What is the best way to place concrete?

In general, concrete should be placed in walls, thick slabs, or foundations in horizontal layers of uniform thick- ness; each layer should be thoroughly consolidated before the next is placed. The rate of placement should be rapid enough so that previously placed concrete has not yet set when the next layer of concrete is placed upon it.

How thick do you have to be to finish concrete?

Placing and Finishing Concrete. from placing freshly mixed concrete on concrete past initial set. Layers should be about 150 to 500 mm (6 to 20 in.) thick for reinforced members and 380 to 500 mm (15 to 20 in.) thick for mass work; the thickness will depend on the width between forms and the amount of reinforcement.