There is a problem with the brick chimney, how to maintain and repair it?

There is a problem with the brick chimney, how to maintain and repair it?

The chimney has high anti-pollution performance and has the effect of pulling out fire and smoke. There are many new chimney construction projects. The new construction of chimneys is also complicated and has been improved for a long time. However, there are still some problems with chimneys, and we should find them in time. If there is a problem, take timely measures to maintain and repair it. Today we will analyze the specific situation in detail!

Phenomenon 1. The main reinforcement, auxiliary reinforcement or stirrups inside the concrete are exposed on the surface of the structural member

Prevention measures:

1. When pouring concrete, ensure that the position of the steel bar and the thickness of the protective layer are correct, and strengthen the inspection and inspection. When the steel bar is dense, the stone of appropriate particle size should be selected to ensure the accurate mix ratio and good workability of the concrete; the formwork should be fully moistened and carefully Block the gaps well; Vibrating concrete is strictly prohibited from hitting the steel bars. During operation, avoid stepping on the steel bars. If there is stepping or tripping, adjust the straightness in time; the protective layer concrete should be vibrated and compact; Damaged corners.

2. For the leaking ribs on the surface, after brushing and cleaning, apply 1:2 or 1:2.5 cement mortar on the surface, and smooth the parts that are full of leaking ribs; chisel the weak concrete and protruding particles with deep leaking ribs, and wash them clean After that, it is filled and compacted with fine stone concrete that is one level higher than the original.

Phenomenon 2. There is a lack of slurry and many small pits and pits on the local surface of the concrete, forming a rough surface, but no steel bars are exposed.

Prevention measures:

The surface of the formwork should be cleaned, and there should be no dry hard cement mortar and other debris. Before pouring concrete, the formwork should be fully moistened with water, and the gaps of the formwork should be tightly blocked with linoleum paper and putty. Brush evenly and do not leak; the concrete should be evenly vibrated and compacted in layers until air bubbles are removed.