Answers

  • 0
  • 0

Influence of Cement Foaming Agent on Foam Concrete(1)

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net



The latest forecast from consulting firm AlixPartners is that the chip shortage may cost the global auto industry $110 billion; it will reduce global auto concrete foaming agent.

The cement foaming agent is the key to the quality of foamed concrete. A good cement foaming agent can be made into high-quality foamed concrete. The following is a talk about how each performance index of cement foaming agent affects the quality of foamed concrete.

 

1.    The more uniform the better, the bubble diameter should be the same size 

 

The more narrow the ideal pore size distribution the better, that is, the pore size of the pore is as consistent as possible, the difference is not too big. The corresponding requirements of the foam should be uniform, not different sizes. The bubble diameter of the foam cannot be the same but should be similar, the bubble diameter range as small as possible, and the difference between the maximum and minimum bubble diameter is not too big. It is required that the pores formed by the foam be uniform, which can avoid the concentration of compressive stress in the bullae and reduce the compressive strength. If the size of the foam is not uniform, the stress is concentrated in the bullae, which is very easy to cause it to become a weak link and crack first when under pressure. 

 

2.    The higher the foam stability, the better; the longer the stable bubble time, the better 

 

Foam with good stability has tough liquid film and good mechanical strength, which is not easy to burst or excessive deformation under slurry extrusion. In addition, it has self-retaining water, the water on the liquid film is not easy to be lost under the action of gravity and surface tension, and can keep the thickness and integrity of the foam liquid film for a long time so that the foam can stay for a long time without bursting. 

 

The stability of foam has three influences on the porosity: it can make most of the foam not disappear, and it is fixed in the foam concrete after the initial setting of the slurry to form the porosity. If the foam stability is not good, most or a small part of the foam will burst after pouring, forming few pores, and even make the slurry collapse soon after pouring, which is commonly known as collapse mold, resulting in complete failure of pouring. 

 

Foam with good stability, the slurry is not easy to be deformed too much under extrusion, and has certain pressure resistance to keep itself approximately spherical, which can eventually form spherical pores with good shape; 

 

Foam with good stability, the liquid film is not easy to burst in the slurry body, and it is not easy to form connected holes formed by gas collusion after bursting. Therefore, it eventually forms an ideal closed hole. The less stable the foam, the fewer closed holes, and the more connected holes. Therefore, the stability of foam should not only not collapse after pouring as the standard, but should not collapse after pouring, the final formation of pores approximately spherical, disconnected three indicators as the standard. Most people take no collapse after pouring as the standard to measure foam stability, which is a misunderstanding in understanding and the lowest standard of foam stability. 

 

When there is no standard measuring instrument to measure the foam stability, the foam stability time can be used to measure the foam stability. The foam stabilization time should meet the initial setting needs of the cementitious materials used. After the initial coagulation of the slurry, it can fix the foam, retain the shape of the foam, and make it into an st. 

 

As we know, any cementing material, including cement and magnesite, has an initial setting time, especially the most widely used ordinary Portland cement, the initial setting is mostly later than 45min. If the foam stability is poor, cement and other cementing materials have not set, the foam has burst, then the foam cannot form pores in concrete. In general, the minimum requirement for foam stability is to make the foam stability time longer than the initial setting time of the gelled material of 10 ~ 20min. As the initial setting time of various cementitious materials is not consistent, the foam stability time is also different. In general, the foam stability time for fast gel setting materials can be shorter, while the foam stability time for slow gel setting materials should be as long as possible. Even if the same cementitious material, temperature ma is different, its initial setting time is different, the change is quite big. For example, put Si cement needs 40min to set in summer, and in the winter of 5 below, 80min will not set in the beginning. Therefore, the stabilization time of bubbles cannot have a constant specific standard, should be determined according to the situation. To make the foam adapt to the needs of various use conditions, it should be stabilized for as long as possible.

 

Generally speaking, the stabilization time of bubbles should meet the following requirements:

1. When used in Portland cement and without coagulant, the stability time should be greater than 60min; The ideal maximum is greater than 3h; 

2. When used in sulphoaluminate cement, high alumina cement, ferric aluminate cement, fast setting Portland cement, and other fast setting cement, the stability time should be greater than 30min, preferably greater than 60min; 

3. When used in magnesium cement, the foam stability time should be greater than 40min and preferably greater than 80min;

4. When used for cementitious materials mixed with a large amount of filler or active waste slag such as fly ash, the foam stability time should be extended. The larger the amount of filler or active waste residue is, the longer the foam stabilization time should be.

 

The specific bubble stability time should be determined by a small test, so as to not collapse after pouring, not connected after the formation of pores, and not excessive deformation as the principle.  The big rule is that the longer the bubble, the better. 

 

Suppliers of Concrete Additives

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.


The day after the shooting at a Texas elementary school, the National Rifle Association issued a statement saying it "extends its deepest sympathies to the families and victims involved in this terrible and evil crime," adding it would "reflect on these events and pray for the victims."  

It comes just days before the National Rifle Association's annual convention in Houston, Texas.  Houston is less than five hours away. Texas Governor Tony Abbott, Senator Ted Cruz, and others are scheduled to attend the event, which has also caused a lot of controversies.  

Texas Democratic gubernatorial candidate Mark O 'Rourke took to social media to call on Abbott to pull out of the convention, urging that it be held outside Texas. Many American netizens also took to social media to express their dissatisfaction. "I wish the NRA's annual meeting was held three days after 19 children and two adults were massacred," said one. "The school shooting was not a lone Wolf, but with the help of the NRA."

Between 2000 and 2020, US gun manufacturers produced more than 139 million guns for the civilian market, according to the Justice Department report. The NATIONAL Rifle Association (NRA) is one of the leading gun rights advocates with more than 5m members and deep pockets. The United States has not passed major gun control laws for more than two decades, blocked by gun interests.

The concrete foaming agent price is predicted to increase in the next few days.

Inquiry us

High Purity Iron powder Fe Powder CAS 7439-89-6, 99%

High Purity Tungsten Carbide WC Powder Cas 12070-12-1, 99%

High Purity Spherical Graphite C Powder CAS 7782-42-5, 99.9%

High Purity Copper Oxide CuO powder CAS 1317-38-0, 99.9%

High Purity Colloidal Gold Nano Gold Solution CAS 7440-57-5

How to determine the optimum dosage of concrete superplasticizer

Factors affecting the effect of concrete superplasticizer

Why should polycarboxylate superplasticizer be added to concrete

What Role Do Early Strength Agents Play?

What is the 3D Printing Metal Powder

What are Ni-Ti Alloys?

What are Commonly Used Milling Cutter Coatings?

What Is Graphite Lubricant?

The rising price of coke also has a certain impact on the price of the automatic cut to length line

How does Concrete Superplasticizer Change the Strength of Concrete?

Researchers Developed Graphene-based Foam Composites For Efficient Water Filtration

What is Manganese Dioxide MnO2 Used For?

What is Boron Carbide Used For?

What are Molecular Sieves Used For?

What is Nano Silica Used For?

Our Latest Answers

What is a polycarboxylate superplasticizer

In 2023, the China Greater Bay Area Concrete Industry High-Quality Development Seminar and the Expo on Concrete Equipment and Technology will take place at the Guangzhou Canton Fair Complex. Guangzhou Canton Fair Complex. The conference's theme will…

What is Molybdenum disulfide MoS2 powder

Description of Molybdenum diulfide Molybdenum disulfide (also known as MoS2) is a transition metal sulfide. It is dark grey, or black, solid. The layers of the crystal structure are made of alternately arranged molybdenum-sulfur atoms. Molybdenum d…

Why does properly poured concrete end up cracking

It is very easy to cause concrete cracking if the construction or maintenance are not done correctly. What are then the five main causes of cracking concrete? 1. The cement proportion problem: Some workers in construction will add more water for a mo…