What is the self-compacting concrete construction process?

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Self-compacting concrete construction process is equivalent to the construction process of conventional pumped concrete. This method generally involves processes such as formwork construction and pre-cast construction.

I. Formwork construction. Self-compacting concrete fluidity, concrete can produce large lateral pressure before setting, so the template should have enough strength, rigidity and stability. According to the height of concrete pouring, calculate the maximum lateral pressure generated by the concrete, and firmly reinforce the template.

Two, pre-embedded construction. Work embedded parts construction, including grouting pipe, exhaust pipe, cooling water pipe, water stopper, gold knot embedded parts construction, which water stopper, gold knot embedded parts construction should be carried out according to the design requirements.

1, grouting pipe

Narrow space hole structure is generally irregular special closed structure. Although the use of self-compacting concrete, it is likely to be localized overhead. In addition, due to the higher cement content of self-compacting concrete, the shrinkage of self-compacting concrete is larger than that of ordinary concrete, and quality defects such as de-voiding between the concrete and the contact surface may exist. Therefore, backfill and contact grouting systems should be arranged and post grouting should be used to compensate for possible localized concrete defects.

2, cooling water pipe arrangement

Self-compacting concrete contains a large amount of cement, and the heat of hydration of concrete increases greatly. In order to reduce the temperature rise of concrete, water cooling is required, cooling water pipe should be densely arranged, the spacing is 1.0 meters, the length of each cooling water pipe should not exceed 200 meters.

3, exhaust pipe layout

Self-compacting concrete usually contains a large amount of air and foam, in order to ensure that the top layer of concrete poured dense, generally set up exhaust pipe or vent.

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