How to quickly improve the surface strength of concrete?

You can try the ash and sand treatment agent or concrete surface rebound enhancer produced by our company.

This product can quickly penetrate into the interior of concrete, through the reaction between the two components and the reaction with the unhydrated cement and cement hydration by-products such as calcium hydroxide in the concrete, to generate a large number of branch-like calcium stone crystals, block the pores and form a three-dimensional network structure, increase the compactness of concrete, greatly improve the strength and hardness of the concrete surface, and form a long-term stable and closed, strong and wear-resistant, dust-free, water-resistant and chemical-resistant surface.

Performance characteristics: 1.Rapid penetration: Generally, it can penetrate to 2-3cm below the surface layer of concrete after three days.

2.Continuous and stable enhancement and reduction of carbonization: the simple use of this product can increase the strength of concrete by 10-30%, up to 40%. And the strength is stable for a long time. At the same time, this product can reduce the carbonization value of concrete.

3.Rapid onset of action: the effect is obvious after 3 days, and the optimal value is reached after one week.

4.Maintain appearance: There is no change in the appearance and interface properties of concrete, and it does not affect other secondary construction.

5.Green environmental protection: no formaldehyde, no heavy metals, non-toxic, non-flammable, non-volatile, TVOC is far lower than international standards, safe construction.

6.Easy to use: direct spraying, saving time and labor.

Surface strength is mainly hardness,

The first method is to plaster the surface with high mortar (this can be self-equipped with cement poly mortar).

Method 2: Improve the hardness and compactness of the surface sand itself, (special cement curing material, hydrate calcium silicate and Ca(OH)2 on the surface, and convert it into a material based on silicon dioxide and calcium silicate).

Carbonize the concrete.

Brush, concrete surface enhancer, simple and fast, colorless.

Beijing Oudijia.

Early strengthening agent during concrete construction.

1. Choose cement with high strength grade. According to the calculation, the purchase of cement with a certain cement strength can improve the concrete strength;

2. Quality control of fine aggregates. Usually, the fine aggregate in the concrete is the sand quarrel, and the liter number is divided into coarse sand, medium sand and fine sand according to the fineness modulus. It should be noted that the sand is too coarse, which is easy to cause water leakage in the fresh concrete, which affects the workability of the concrete.

It can be seen that when the workability requirements of concrete are constant, in order to save cement and improve the strength of concrete, medium coarse sand with good gradation should be selected;

3. Quality control of coarse aggregates. Usually the coarse aggregate in concrete is stone. The use of artificial gravel can increase the strength of the concrete compared to the use of natural pebbles;

4. The selection of appropriate admixtures is to improve the strength of concrete.

The main measures to improve the strength of concrete are:

1. Improve the compactness of concrete, control the water-cement ratio and ensure sufficient cement dosage, which is the key to ensure the compactness of concrete and improve the durability of concrete, within a certain range, the smaller the water-cement ratio, the higher the concrete strength, on the contrary, the larger the water-cement ratio, the more water consumption, and the more pores left by the evaporation of excess water, so as to reduce the strength.

2. Improve the particle gradation of coarse and fine aggregates, the particle gradation of sand refers to the situation that the sand particles with different particle sizes are matched with each other, and the sand with good gradation has a small porosity, which can not only save cement, but also improve the workability of the concrete mixture, and improve the compactness, strength and durability of the concrete.

3. Reasonable selection of cement varieties, but there are many varieties of cement, so the choice of cement must be cautious, once the cement stone is damaged, the durability of the concrete is destroyed, so the selection of cement needs to pay attention to the specific performance of cement varieties, choose small alkali content, low heat of hydration, small dry shrinkage, heat resistance, water resistance, corrosion resistance, good frost resistance of cement, and choose according to the specific situation.

The main factors affecting the compressive strength of concrete are cement strength and water-cement ratio, to control the quality of concrete, the most important thing is to control the cement quality and the water-cement ratio of concrete. In addition, there are other factors that cannot be ignored that affect the strength of concrete.

The main measures to improve the strength of concrete are as follows:

1. You can use cement with a higher strength value.

2. It can reduce the water-core pin-to-ash ratio of concrete.

3. In the curing, steam, damp heat and other methods can be selected, which can effectively enhance the strength of concrete.

4. When blending, mechanical stirring and strong vibration can be used, which can not only reduce its water-cement ratio, improve construction efficiency, but also enhance its strength.

What to pay attention to in concrete construction.

1. When deploying concrete, it must be operated in accordance with its proportion and construction requirements, and cannot be deployed at will, so as not to affect its construction intensity. When it is mixed, it should be used up as soon as possible, if it is not used for a long time, the concrete will have problems such as partial condensation, and there will be problems such as cold joints in pouring.

2. If the concrete is poured many times, the time of pouring before and after is not too short, at least more than one and a half hours, and for the place where they are handed over, it is necessary to use a vibrating rod to continuously stir, which can enhance its strength.

3. When pouring concrete into the formwork, do not pour it all at once, but pour it slowly. If the pouring height of the concrete is greater than two meters, it is necessary to use the string drum and slip to change the tube to cut the material. When pouring, it should also be noted that the direct distance between the discharge nozzle and the pouring layer should not be greater than meters.