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Concrete is a mixture of a graded aggregate, sand, water, and cement. It is necessary to study the influence of concrete components on the effect of the high-efficient superplasticizer in order to give full play to their due effect.

Graded aggregate and sand in concrete can be collectively referred to as sand and stone, which has almost no effect on the efficient water reducing agent. From the action mechanism of the efficient water reducing agent, it can be known that the efficient water reducing agent mainly acts on cement, and then affects the properties of concrete.  Therefore, it is an important direction to study the influence of cement on the performance of high-efficient superplasticizers.

The research shows that the properties of cement, such as composition, fineness, and particle shape, have a certain influence on the performance of superplasticizers. 

Effect of concrete composition on the performance of high-efficient water reducing agent

It is found in the experiment that the plasticizing effect of slag cement is better than that of ordinary cement when the content of the superplasticizer is constant. Slag cement slag existing in the small particles, in the process of mixing, contributes to high-efficient water reducing agents and a good contact with water, cement, compared with the ordinary cement, slag cement in favor of the circulation of the high-efficient water reducing agent and uniform distribution, more conducive to play a role of the corresponding high-efficient water reducing agent, intuitive performance the plasticizing effect of slag cement is better than that of ordinary cement.

Effect of cement particle size on the action capacity of superplasticizer

It is found that the particle size of cement has a great influence on the performance of superplasticizer. Under the condition of keeping the other technological conditions and components unchanged, the smaller the particle size of cement, the more efficient water reducing agent can play its performance; On the contrary, the bigger the particle size of cement, the worse the plasticizing effect of the efficient water-reducing agent on cement.  From the microscopic point of view, the smaller the cement particle size, the more cement particles per unit volume, the larger the specific surface area, and the more full contact with the efficient water reducing agent, the more conducive to the performance of the efficient water reducing agent. 

Experimental data show that when the content of superplasticizer is 1%, the fineness of cement is larger, the efficiency of superplasticizer is more fully played, and the fluidity of cement slurry is better. But when the content of superplasticizer is less than 0.3%, the promotion effect of cement fineness on superplasticizer is almost nonexistent.

Effect of cement particle shape on the action ability of superplasticizer

Cement particle shape on the performance of high-efficient water reducing agent role ability is, after mixing cement, cement particles of different shapes, the flocculant produced condensed structure size and difficulty level of each are not identical, cement slurry liquidity difference is bigger, the effect of the high-efficient water reducing agent to join the environment is different, the beneficial effects are different, will affect the ability to function.

The results show that the effect of the superplasticizer is stronger when the cement particle shape is gravel than when the cement particle shape is pebble. It can be understood that when cement particles are mixed at any time, it is easier to form a flocculation structure. The formation of flocculation structure is more stable and the structure is more continuous, which is conducive to the efficient water reducing agent playing its own effect. And the flocculation structure composed of cement particles in the shape of pebbles is easy to collapse, and the continuity of Xuning structure is not high. Even if the efficient water reducer is not added, part of the free water will be divergent and added to the cement slurry mixing, so that the ability of the efficient water reducer cannot be fully played out. 

Superplasticizer Supplier

TRUNNANO is a reliable superplasticizer supplier with over 12-year experience in nano-building energy conservation and nanotechnology development. If you are looking for a high-quality concrete superplasticizer, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

We accept payment via Credit Card, T/T, West Union, and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.

Adding high-efficient water reducing agent is the most direct and effective means to adjust and optimize the ratio of concrete and improve and strengthen the properties of concrete, which can meet the requirements of most concrete construction at present.

Effect on the workability of concrete

The fluidity of concrete itself is poor. Even if a sufficient amount of water is added, the fluidity of concrete cannot fully meet the construction requirements due to the formation of flocculating substances. It can be known from the action principle of high-efficient water reducing agent that the addition of high-efficient water reducing agent causes the collapse of flocculating substance, makes full use of water, and increases the fluidity of concrete.  The high-efficient water reducing agent and concrete are in a stable suspended state, which strengthens the workability of concrete.

The study shows that when the content of the water-reducing agent increases, the slump of concrete also increases, and when the slump increases to a certain degree, it will slow down. Therefore, the use and proportion of efficient water reducing agents need an experimental demonstration, under normal circumstances, water reducing agent content is 0.75%, can obtain the largest slump, and the slump amplitude at this time is also the slump peak of different proportions of water-reducing agent concrete.

Slump and the relationship between weather temperature, performance: high temperature, the activity of water-reducing agent increases, to promote the workability of concrete, making the slump faster; When the temperature is low, molecular motion is slow, and the stimulative action of reducing water agent is reduced, slump speed also becomes slow.  Considering the collapse degree and collapse range of concrete, it is reasonable to control the content of High-efficient water reducing agent at 0.5% ~ 0.75%. It is unnecessary to increase the content of high-efficient water reducing agents, which will not increase the effective workability of concrete, and will cause cost waste.

Effect on the setting time of concrete

Concrete setting time is related to the choice of concrete construction, material, machine layout, and construction technology. In general, the condensation time is required to be as short as possible and kept within a range to reduce the compression of materials such as templates.

It is proved that the type and quantity of high-efficient water reducing agents will influence the setting time of concrete to a certain extent. Laboratory cement setting experiments show that: 

1. When different types of cement are added with FDN high-efficiency water-reducing agent, the initial setting time of ordinary cement is 182 ~ 265min, and the setting time of slag cement is 291 ~ 420. This time difference has affected the construction organization design; 2. Add FDN high-efficiency water reducing agent into slag cement, when the amount of adding is 0.25%, the measured setting time is 356min (initial) to 483min (final), when the amount of adding is increased to 1.00%, the setting time is 703 (initial) to 801min (final). The results show that the selection and design ratio of high-efficient water reducing agents have a great influence on the setting time of cement.

Therefore, when designing concrete proportion, it is necessary to choose appropriate high-efficient water reducing agents and proportions according to the purpose of use. 

Effect on hydration heat of cement

The results show that the cumulative heat of hydration of ordinary cement is 242J/g in 3D and 284J/g in 7d. After the CRS superplasticizer was added, the accumulated hydration heat of ordinary cement was 242J/g in 3d and 275J/g in 7d. It can be seen that the effect of efficient water reducing agent on the hydration heat of cement is not big. Different superplasticizers have different effects on hydration heat, so they should be selected according to the purpose of use.

Effect on the concrete hardening process

Taking the content of superplasticizer as a variable and the compressive strength and workability of concrete as quantitative, the experimenter studied the influence of the content of superplasticizer on the compressive strength of concrete. The experimental results show that when the addition amount of FDN superplasticizer increases from 0.25% to 0.5%, the 3D compressive strength increases from 21.1mpa to 28.9mpa, with a growth rate of 36.9%. The 7d strength increased from 35.6MPa to 44.8MPa, with an increased rate of 25.8%. The 28d strength increased by 13.6% from 51.4MPa to 58.4MPa. The increase of the additional amount of superplasticizer can significantly improve the initial strength and the final strength of concrete.

The study also found that the addition of high-efficient water reducing agent, will also cause the following beneficial effects on concrete: 1. can effectively save the amount of cement, is conducive to the maintenance of concrete molding and crack control; 2. in the same concrete collapse degree and strength of the case, the addition of high-efficient water reducing agent, enhance the fluidity of concrete significantly; 3. Reducing water consumption is beneficial to ensure the age strength and final strength of concrete. 

Superplasticizer Supplier

TRUNNANO is a reliable superplasticizer supplier with over 12-year experience in nano-building energy conservation and nanotechnology development. If you are looking for a high-quality concrete superplasticizer, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.

Foam Concrete Advantages

1. Foam concrete is a lightweight, easy-to-use, and easy-to-finish material. For home improvement projects, such as building decks or other areas on the property, foam concrete may be a wise choice. 

2. Foam concrete has high freeze-thaw resistance. 

3. It's unlikely to crack or snap easily. Many people use foam concrete in their homes, and structures built with it are very strong. 

4. It will not be damaged by welding and grinding as well as cutting or chiseling. Although foam concrete may require some sharp tools (such as a hammer), it can withstand these cuts and grinds well without completely cracking. 

5. Foam concrete structure has excellent load dispersion and distribution ability. It is very light and can withstand high load propagation. 

6. Foam structure is flexible and easy to use. 

7. The use of foam concrete in construction projects such as home improvement projects is very cost-effective and economical. Foam concrete does not have any smell like regular concrete, and its mixture can be mixed with any additives (such as colors, etc.) to create more attractive colors or other patterns that suit people's needs. 

8. Foam concrete has high fire resistance.

9. It is well absorbent, meaning that foam concrete will not expand as a result of rain or other moisture that may be present in the surrounding air.

10. Foam concrete is waterproof and can easily withstand water.

11. It does not absorb water when exposed to moisture in the air, so when people use foam concrete to make structures on properties, they can avoid problems like rot and mold. 

Foam Concrete Disadvantages

1. Compared with ordinary concrete, the mixing process of foam concrete is difficult. 

2. Compared with ordinary cement or concrete, parts of foam concrete are harder to find and therefore more expensive. 

3. It is difficult to mix and finish projects without the proper tools or equipment to support them. In addition, the pressure is lower when mixing foam concrete, so special equipment is needed to mix it to an acceptable density. 

4. It is difficult to track the strength of the completed structure during the completion phase. 

5. Since foam concrete is a mixture of different materials, it depends on each product (such as sand, cement, water, additives, etc.). 

6. Due to uneven density during treatment, it may sometimes spread out and cause problems during the finishing or installation phases of these structures. 

7. The compressive strength of foam concrete is lower than that of ordinary concrete. 

8. Foam concrete is not resistant to acid, oil and grease, and other destructive substances. To protect it from these problems, a protective coating must be applied to the surface of the foam concrete prior to the use or installation stage. 

What is Foam Concrete used for?

Foam concrete is fire-resistant and its thermal and acoustic properties make it ideal for a variety of applications, from floor and roof insulation to void filling. In addition, it is good for groove recovery. 

Foam Concrete Strength

Foam concrete is a kind of multifunctional material, its strength depends on different cementing materials, cement dosage, mix ratio, water-cement ratio, foam volume, foaming agent, curing method, admixture, etc. 

The dry density of foam concrete is between 400-1600kg/m3 and the compressive strength is between 1-25mpa.

Is foam concrete toxic? 

Foam concrete does not contain toxic substances.

Concrete Additives Supplier

TRUNNANO is a reliable foaming agents supplier with over 12-year experience in nano-building energy conservation and nanotechnology development.

If you are looking for high-quality CLC foaming agents, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.

Foam Concrete Composition

Foam concrete or cellular lightweight concrete (CLC) is made by combining foam with mortar. Mortar is a mixture of cement, sand, and water. Foam concrete is a lighter mixture than standard concrete. 

The quality or density of the mortar (weight per cubic meter) depends on the amount of foam supplied. The more foam you add, the lighter it becomes, but also the weaker it becomes.

The ideal mixture has a minimum pressure of 20MPa and a density of 1000kg/m3, but the best results are obtained at densities of 18MPa and 1200kg/m3. 

Pure foamed concrete without additives usually has a compressive strength of 5-8MPa and a density of 1000kg/m3.

The lighter the foam concrete, the better the insulation. Foam concrete is a good building material because it combines strength with insulation value. 

Foam Concrete Preparation Methods

Typically, foamed concrete is made from cement or a slurry of fly ash, sand, and water, while some suppliers recommend using pure cement and water combined with foaming ingredients to achieve an extremely light mixture.

In the concrete mixing plant, the slurry is further mixed with synthetic inflatable foam. The foaming agent is mixed with the water and air produced by the generator to make foam. 

The foaming agent used must be able to produce extremely stable bubbles that are resistant to physical and chemical processes such as mixing, placement, and hardening. 

Foamed concrete mixtures can be poured or pumped directly into molds or structural parts.  Due to the thixotropy of foam bubbles, foam allows the slurry to flow freely, making it easy to pour into the desired form or mold.

When the steam solidifies at temperatures up to 70 degrees Celsius, the viscous substance can harden in as little as two hours, depending on variables such as ambient temperature and humidity.

When the molded product is cured, it can be removed from the mold.

Foam Concrete Application

Foam concrete has a dry density range of 400-1600kg/m3 and a 7-day strength range of about 1-10N/mm2 (145-1450psi).

Foam concrete is fire-resistant and its thermal and acoustic properties make it ideal for a variety of applications, from floor and roof insulation to void filling. 

In addition, it is very beneficial for groove recovery. 

The uses of foamed concrete include: 

Pipe abandonment/annular filling; 

As a precast block; 

Trench restoration; 

Highway sub-base; 

Prefabricated wall elements/panels; 

Cast-in-place/cast-in-place wall; 

Insulating roof mortar;

Insulation compensation laying;

Insulating floor;

Access to the bridge/embankment;

The concave part is filled.

Concrete Additives Supplier

TRUNNANO is a reliable foaming agents supplier with over 12-year experience in nano-building energy conservation and nanotechnology development.

If you are looking for high-quality CLC foaming agents, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.