1) Use or increase the dosage of water reducing agent, or use a more efficient water reducing agent to reduce the water cement ratio of concrete;
2) When the water-binder ratio is constant, part of cement is replaced by lime, and the dosage of water reducer is adjusted;
3) The total water consumption is unchanged, and the dosage of water reducer is adjusted by adding fly ash or mineral powder (as upstairs said, the water-binder ratio is actually reduced).
Question 2: How to increase the strength of cement, add steel bars and fibers, and use high-strength cement to ensure the humidity and temperature during the 28-day curing period. Generally, the humidity is controlled at 95% and the temperature is around 25℃.
Question 3: How to increase the strength of cement is mainly related to cement raw materials, such as silicate or fly ash, volcanic ash and so on. Meanwhile, some physical and mechanical indexes are also important factors, such as fineness.
I think you have to find out the reason and principle of cement strength before you can talk about how to improve it.
Question 4: Hello! Excuse me, which curing agent can be added to cement brick to improve its strength! It takes more than ten hours to finalize the design. If you apply quick-drying paint, it won't last. Juwo JW-G0 1A component liquid multifunctional concrete strong silicon sealing curing agent is recommended.
JW-G0 1A component liquid multifunctional concrete strong silicon sealing curing agent is an environmentally friendly, non-toxic and non-combustible high-tech water-based chemical tackifier. Its main components are water and polysilicate compounds. JW-G0 1A component liquid multifunctional concrete strong silicon sealing curing agent can completely penetrate into concrete and react with calcium and magnesium plasma in concrete to generate hard crystalline substances. A network structure is formed in three-dimensional space, which increases and strengthens the gel structure in cement, solidifies all components in concrete into a compact whole, reduces the gel gap in concrete, blocks the pores of concrete and increases the density of concrete, thus greatly improving the strength, hardness and wear resistance of concrete floor and achieving the functions of dust prevention, hardness, wear resistance and easy cleaning. JW-G0 1A component liquid multifunctional concrete strong silicon sealing curing agent can prevent solid and liquid impurities from entering the concrete, but at the same time allow gaseous water to flow freely, so that your concrete can keep its "breathing" function. The rapid improvement of concrete performance can produce luster and excellent hardening, impermeability, wear resistance and dustproof effects; Resistant to water, industrial chemicals, oil and food stains; It is a miracle to renovate the ground.
JW-G0 1A component liquid multifunctional concrete strong silicon sealing curing agent can:
1, shrinkage of concrete pores, effective inhibition of external pollutants into concrete.
2. Enhance the surface hardness and wear resistance of new and old concrete floors.
3. Improve the compressive strength of the old and new concrete floors.
4, inhibit the erosion of chemical substances.
5. React with chemicals in concrete to form gel in its pores.
6, prevent concrete peeling, peeling.
7. Seal the concrete to increase its density.
8. Marble luster will appear on the treated concrete floor. The longer it is used, the better the luster will be.
Question 5: How to increase the strength of cement board? Improving the strength of concrete is something that everyone is thinking about when doing concrete engineering.
From a macro point of view, concrete is nothing more than stone, sand, cement and water, or adding some additives and mastering the best mixture ratio can achieve high strength, reasonable materials and convenient construction;
But from the microscopic analysis, it is related to the construction cost and convenience. To solve the problem of concrete slump, there is no small debate. Large slump brings convenience to construction, but it affects the shrinkage, creep and strength of concrete. Small slump is good for concrete strength, but it brings a lot of trouble to construction.
Everyone engaged in concrete engineering knows that once cement and water generate hydration heat in concrete, it will directly affect the strength of concrete; The intensity of hydration heat reaction is directly related to the amount of water in concrete; Reducing water quantity is the key.
There is a term called "grading" in civil engineering theory, which means that many large stones are put together, and the gap in the middle is filled with small stones, and the small stones also have gaps, so smaller stones are filled. . . . . . This is in theory, the laboratory can do it, but it is difficult to do it in practice, especially in the construction site, the original materials are more and more expensive, and the delay in construction period is the material.
Regarding the durability design of concrete, there are many suggestions in recent codes, all of which sacrifice the strength of concrete to improve durability. Durability is to reduce the shrinkage and creep of concrete and prevent excessive hydration heat (by reducing the amount of cement); Another point is to increase the protective layer of steel bars (increase the amount of steel bars) and increase the heat dissipation measures for mass concrete structures. . . . . .
Question 6: How to improve the strength difference of cement wall and increase the surface hardness by brushing curing agent materials?
Cement repair expert
Question 7: How to increase the strength of a very thin cement board so as not to be brittle? I am a worker. Let me answer you. Although I don't know the specific size of the cement board you made. But the general process is as follows. First of all, you need mixed sand (river stone+sand). Second, you need to weave a reinforced wall (tailor-made according to the size of your cement slab, just one layer, no need for three-dimensional, but remember to tie the reinforced bar with tie wires before. ) cement in the third site. Fourth, you need a mold to fix the shape, size and volume of your cement board. With these things, hard cement slabs can be made. Tell you how to do it: mix sand with cement water, remember to do it in proportion, but forget the specific proportion. Not too thin and not too dry. Viscosity is the best. Put the completed concrete into a fixed mold, first hit half, and place the reinforced wall. Hit the other half. The surface is pressed out with a clay plate. Then wait for him to solidify. It will take 2-3 hours (in the sun) to dismantle the mold. Don't touch him on the first day In the next few days, you need water to pour the cement board. Cement lives on water. Cement board has its own curing period. Watering with water is called keeping in good health. Water both sides for one day. It will take about 10 days to end the medical insurance. It was very hard at that time. If you don't stay healthy. Under the exposure of the sun, the cement board will be crisp, fall off when touched, and crack when stepped on. Therefore, water will be used to increase the strength of cement board.
Question 8: How to improve the later strength of cement? The early strength of cement clinker is determined by C3S and C3A. If they are higher, the early strength will be higher. The later strength is determined by C2S and C4AF, and the higher the two, the higher the later strength. When C3S is high, the early and late strength will be high.
Question 9: How to improve the strength of concrete? The two main points are: improving the strength of cement in concrete.
Reduce the water-cement ratio of concrete
Secondly, there are factors such as raw materials, construction, feeding, age and mixture ratio.
Question 10: How to improve the strength of cement products and cement consumption?
It depends on your intensity level. What about the raw materials?