Making vibrating concrete mortar is a process that uses vibrating equipment to improve the density and strength of concrete. Here are the detailed steps and precautions:

1. Material preparation

The following materials are required to make vibrating concrete mortar:

Cement: ordinary Portland cement or special cement.

Sand: medium sand or coarse sand with moderate fineness modulus.

Water: clean and unpolluted water.

Aggregate (optional): add fine aggregate (such as crushed stone) as required.

Admixture (optional): such as water reducer, thickener, etc. to improve performance.

2. Mix ratio design

Design the mix ratio of concrete mortar according to project requirements to ensure strength and workability:

The typical ratio of cement: sand: water is 1:2:0.4~0.5 (weight ratio).

Adjust the amount of admixture as needed.

3. Mixing

Dry mixing: Pour cement and sand into the mixer and mix evenly.

Add water and mix: gradually add water and mix until the mixture is uniform and free of lumps.

Addition of admixtures: If admixtures are needed, add them according to the instructions and mix them evenly.

4. Vibration compaction

Casting: Pour the mixed concrete mortar into the mold or construction area.

Inserting vibration equipment:

Use the internal vibrator (vibration rod) to insert into the mortar and slowly lift it from the bottom.

Or use the external vibrator (vibration table) to vibrate the mold.

Vibration time: vibrate for about 10~20 seconds at each point until the mortar surface is slurry and no bubbles emerge.

Avoid over-vibration: Over-vibration will cause aggregate sinking and mortar stratification.

5. Maintenance

Cover after initial setting: After the mortar is initially set, cover the surface with a wet cloth or plastic film.

Keep it moist: Sprinkle water regularly for maintenance for 7~14 days.

Avoid rapid drying: Prevent cracking and strength loss.

6. Precautions

Selection of vibration equipment: Select appropriate vibration equipment according to the construction scale.

Vibration frequency and amplitude: Adjust to the fluidity of the mortar.

Layered pouring: For thicker mortar layers, pour and vibrate in layers.

Safe operation: Wear protective equipment to avoid injury from vibrating equipment.

7. Application scenarios

Vibrating concrete mortar is widely used in:

Building structures: such as walls, floors, beams and columns, etc.

Repair projects: such as crack repair and surface repair.

Prefabricated components: such as concrete bricks, pipes, etc.

Summary

The key to making vibrating concrete mortar lies in reasonable mix ratio, uniform mixing and effective vibration compaction. Through the vibration process, the density and strength of the mortar can be significantly improved, which is suitable for a variety of construction engineering scenarios.

Article Title: How to make a vibrating concrete screed
Author:Xingaonai
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