As we all know: when pumping cement and other mixtures, the purpose of appropriately adding air-entraining agents, water reducing agents and admixtures is to gradually improve the rheological properties of the cement mixture, thereby reducing the consumption of raw materials. , without affecting the quality. Of course, in addition to this, we also need to reduce the amount of concrete adsorbing cement, steel bars and other raw materials and improve the quality of the cement mixture so that cement and other related raw materials can be pumped to designated locations. Admixtures such as waterproofing agents, air-entraining agents and rust inhibitors are used to improve their durability. What is the purpose of mud inhibitor for concrete?
There are only two main measures for admixtures to deal with the problem of mud: one is to wash the sand with water, and the other is to over-mix polycarboxylate water-reducing agent. Although water-washed sand can control the mud content of the sand from the source, it adds a process and the cost is unbearable for most companies. The use of over-admixing may lead to a series of more serious quality accidents, because the amount of over-admixing cannot be accurately controlled. Once over-admixed, the concrete will take too long to set or even not set. It can be seen that neither of these two methods can effectively solve the adverse effects of mud content on polycarboxylate superplasticizer.
The specific dosage of mud-blocking agent must be confirmed based on trial mixing experiments.
1. If it comes into contact with eyes or skin, rinse immediately with clean water. If serious, seek medical help.
2. If you accidentally swallow it, you can drink a lot of water, vomit it out, and then seek medical help.
At present, the country’s environmental protection requirements for the mining of sand and gravel mineral resources are constantly increasing, and the production cost of high-quality aggregates has increased significantly. At the same time, concrete, as a building structure material in our country, has become increasingly popular with the deepening of national infrastructure construction. , the demand continues to increase, and the contradiction between supply and demand has resulted in the large number of applications of low-quality aggregates in concrete production. These aggregates often contain higher powder and mud content, and their compositions are also different. Research by Wang Zhi and others believed that aggregate mud is mainly composed of kaolin, illite and montmorillonite, and analyzed the molecular structures of three different clays. At present, due to the relatively immature testing technology of mud components, the specific mud The composition of mud cannot be accurately determined. It is generally believed that mud is a mixture of three types of clay minerals.
Additional amount and instructions for use
1. For polycarboxylate superplasticizer with 10% solid content per ton, it is recommended to add 10~30kg of this product. Equivalent or excessive replacement of ether masterbatch. For example, under the same dosage conditions, 30kg of mud inhibitor can replace about 60kg of ether masterbatch (40% concentration) in the compound. Or equivalently replace part of the ether masterbatch.
2. Add and mix together with other materials during compounding, including slump retaining agent, ether masterbatch, retardant, etc., so that each functional additive can eliminate the influence of mud. , give full play to their respective roles.
3. For floor materials with higher mud content or ground ash containing more inactive materials, the dosage should be increased. The specific economic dosage is determined by concrete trial mix and actual project needs due to differences in floor materials.
4. Since there are many types of domestic air-entraining agents, this product may appear flocculent or turbid when combined with the air-entraining agent. In this case, no or less domestic air-entraining agent may be added. This product already contains an appropriate amount of air-entraining components. The details are subject to testing.
The above is the purpose of mud inhibitor for concrete. I hope everyone will pay attention to the specific dosage when using it, so as to better solve it.
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