Reasons and solutions for the ground not to shine on the watered grindstone
Many people think that after the construction of cast-in-place terrazzo floor should have a certain degree of gloss, but I do not know that there is a lot of learning. The brightness of cast terrazzo depends on many factors, more than ten years of teachers may have their own solutions to this problem, but just contact with cast terrazzo people may have a headache on this issue, the following by the small answer to the causes of cast terrazzo ground is not bright and the solution.
Cast-in-place terrazzo why not bright reasons
1. The grinding piece is not used in order
Some of the construction team in order to catch up with the schedule or economic considerations will jump the number of use of abrasive, with 50 mesh diamond abrasive directly with 200 mesh diamond abrasive, the result is that the cast-in-place terrazzo ground will leave a lot of scratches, scratches more cast-in-place terrazzo ground no luster, resulting in brightness on not go.
Solution
The normal should be 50 mesh diamond abrasive, 80 diamond abrasive, or 100 mesh diamond abrasive to open the surface, and then 50 mesh resin abrasive, 100 mesh resin abrasive to eliminate scratches, and then 400 mesh resin abrasive, 800 resin abrasive, 1500 mesh resin abrasive, or even 2000 mesh, 3000 mesh to increase the cast-in-place terrazzo ground low light
2. Holes are not filled
Cast-in-place terrazzo floor will leave a lot of holes after grinding, these holes are large and small, such as not timely and effective treatment, the light will be absorbed, the brightness of light naturally can not go up. Some construction teams will use the brush slurry method to fill the slurry, this method will only form a layer of the film above and below the hole, after polishing the hole still exists, will still lead to cast terrazzo floor brightness is low.
Solution
The use of concrete sealing agent can seal the pores of the terrazzo ground, so that it becomes a dense whole, and then use professional grinding machine multi-level grinding, you can make the ground show a marble-like luster. And will increase with the use of time, the luster will also increase.
3. Aggregate is not evenly exposed
This point is more important, many teachers who have done more than ten years of cast terrazzo floor can not solve the problem, aggregate with more or less, its brightness will naturally be different.
Solution
In the choice of cast-in-place terrazzo ground aggregate needs to consider the brightness of the problem, some aggregate itself has a certain light-absorbing effect. If you have strict requirements on brightness, you can choose glass, white quartzite, and other aggregates with a certain lightening effect.
4. Curing agent, crystallizing agent use the uneven amount
This is a more difficult problem, if dry scrubbing curing agent, the crystallizing agent will be difficult to ensure the uniformity of oxalic acid in the ground. After scrubbing, the cleanliness of the cast terrazzo floor is not consistent, with too much left on the surface will affect the brightness, with less cast terrazzo floor surface hardness is not achieved.
Solution
The construction team needs to have some patience, in the use of curing agent, crystallizing agent is best to choose when spraying type, which can also maximize the cast-in-place terrazzo surface everywhere is evenly sprayed too.
Most of the cast terrazzo ground is not bright because of the above four problems caused, as long as the construction in accordance with the solution can completely avoid these problems.
