Contact Us

Shenyang Hualun Lubricant Additive Co.,Ltd

ADD: Room 8, Floor 25,Block A, No.1 Jianshezhong Road, Tiexi District, Shenyang, Liaoning, China

Contacts: Sylvia yu

Tel: 86-24-85611296  

Mobile: 86-15004099845

Fax: 86-24-85611282


Home > News > Content
Super Overbased Synthetic Magnesium Sulfonate The Method Is Simple And Easy To Apply Aug 03, 2017

Super Overbased Synthetic Magnesium Sulfonate The mineral composition in cement is the main reason for the loss of concrete slump. Many scholars use the cement in the single ore to a certain concentration of water-reducing agent to do the adsorption test, the results: cement C3A, C4AF, C2S, C3S on the water-reducing agent selective adsorption.

When the concentration of water reducing agent is 0.4%, the adsorption capacity of C3A is 150mg / g, C4AF is 280mg / g, C3S is 22mg / g, C2S is 1.9mg / g in the absence of gypsum,Super Overbased Synthetic Magnesium Sulfonate The adsorption amount of C3A was 15 mg / g and X4AF was 40 mg / g. From the above test results can be seen, because a large number of water-reducing agent is C3A, C4AF adsorption. Accounting for more cement components C3S, C2S appears to be insufficient adsorption, so the dynamic potential decreased significantly, the concrete slump loss is great.

The so-called stagnant water doping method and after mixing method, namely: sand, stone, cement, water (some or all of the water) after mixing with water-reducing agent, this method to resist the loss of concrete slump loss has a significant effect.

The main reason is that C3A and C4AF can produce C3AH8 and C4AFH10 rapidly after the cement is in water. In the gypsum environment, the AFm phase is mainly produced. C3A and C4AF are significantly reduced in the system. When the water-reducing agent is added, C3A, C4AF The consumption of water is also significantly reduced,Super Overbased Synthetic Magnesium Sulfonate a large number of water-reducing agent can be more fully C3S, C2S adsorption, cement particles significantly increased the dynamic potential, and in a certain period of time to maintain a more stable electric potential, directly as concrete workability Better, slump loss is small.

This method is simple and easy to use, is currently widely used in concrete. But the role of this method has a certain limit, the use of a certain degree of limitations.

Can inhibit the loss of concrete slump loss of admixtures more, can be divided into inorganic and organic two categories. Whether it is inorganic or organic matter, they have a common ground, can be different degrees of delay in the concrete coagulation time.

Inorganic substances are: gypsum, phosphate, polyphosphoric acid and its salts, boric acid and its salts, polycarbonate and its salts and other substances. Which use more gypsum and polyphosphate (referred to as N salt). The effect of the role of gypsum, has been mentioned in front, do not go into here. The author made a lot of experiments on N salt, that N salt to inhibit the loss of concrete slump loss, have a better effect. And the price is relatively cheap, the study suggests that when the N-salt is added to the fresh concrete,Super Overbased Synthetic Magnesium Sulfonate the surface tension and the critical micelle state of the hydration system can be obviously reduced. In addition, the N salt has a certain adsorption effect on AL2O3, and selectively exchanges with the water-reducing agent adsorbed on the surface of AL2O3. The exchanged water-reducing agent remarkably improves the solubility of the water-reducing agent in the solution, which is C3S, C2S Adsorption provides sufficient water reducing agent,Super Overbased Synthetic Magnesium Sulfonate effectively suppressing slump loss. However, in the use of N salt should be strictly controlled dosage, mixed with too little to suppress slump loss effect is not obvious, mixed with too much to suppress the loss of concrete slump has a good effect, but the impact of concrete early strength. I have more reasonable use of concrete in the N salt, and in which complex triethanolamine or yuan powder and other early strength components, and achieved good results. Organic substances are more, can be divided into two types: one is directly involved, one is the reaction to participate in the type. Directly involved in the main characteristics are: hydroxycarboxylic acid (such as: tartaric acid citric acid and its salts, etc.), polyhydroxy carbohydrates (such as: molasses, polyols, oxygen-containing organic acids, etc.). These substances have a significant retardation effect on concrete. Therefore,Super Overbased Synthetic Magnesium Sulfonate in the general concrete is used as a retarder. Because these substances are mostly surface active role, the cement particles have a strong adsorption on the surface, can effectively inhibit the cement particles cohesion. So to suppress slump loss has a certain effect.