Construction of concrete is the most important task in construction of superstructure. CMC consulting design and construction in Nha Trang, Khanh Hoa aggregate concrete construction principles and other requirements related to construction concrete as follows:

1 . Requirements for materials

Use coarse sand and medium sized (with modules from 2 to 3.3 magnitude) will give concrete more durable type of sand -sized particles.

Stone or gravel aggregate: Must have larger grade of concrete fabrication marking at least 1.5 times. Largest stone size must be less than 1/3 of the minimum thickness of the concrete structure.

Water use and maintenance of concrete mix: Use fresh, clean . Do not use dirty water, brackish water, saline, alkaline …

2 . The principle of making mortar

Weighing, grading was right proportion of concrete grade was selected. The materials must be clean.

Quick Mix mortar ingredients so that they’re consistent.

Only for moderate to mortar mixing water with sufficient flexibility during the construction. For many countries will be less dense concrete. For less water will dry hard mortar dress, wool.

3 . Concrete mixing machine

Concrete grout should be mixed by machine for higher productivity, better quality, saving labor and cement. Normally after which the entire material into mortar mixer, mixing drum is turning 20 rounds.

4 . Concrete mortar mixed by manual methods

First dry sand mixed with cement until all color. Laying stone or a thin layer of aggregate 10 ÷ 15 cm. Scoop mixture of sand – cement evenly on top, then use the water for irrigation part shovels and rakes mix. Then just mix just rules out water for irrigation. Right mix for concrete homogeneous mixture. Mixing time manually mixed concrete from the wet mix should not be longer than 20 minutes for a batch.

5. Concreting

Formwork assembly firm, tight enough to withstand the vibrations flowing dress and not dehydrated cement concrete mortar.

List of reinforced steel placed upright bearing  tie straightened before.

Pour into a continuous concrete block, poured concrete if the user manually cut dress too viscous tattoo quickly and thoroughly for dense concrete blocks , not inside the pore. The use of machine dress (dress table, vibrator) to increase the volume of dense concrete.

6 . Maintenance of moisture for concrete

Concrete formed after completion of covering the surface with a moistened sheet materials such as sacks, broken clockwork … or with water proof materials like nylon, canvas … to avoid dehydration caused sudden cracking of concrete.

After 6 to 10 hours, must be watered regularly moisturizing , water can soak the concrete surface as possible. Maintenance time is about 2 weeks.

7 . The duration of discharge formwork

In good condition maintenance, concrete is poured concrete formwork can be lifted after 3 weeks.

8 . Notes on using cement

Do not direct contact with cement. When mixing mortar to wear masks, gloves, rubber boots.

When cement was shot in the eye with clean water to wash, then drops eyedrops. Severe cases have brought to health facilities for treatment.