concrete admixture is a cutting-edge technology in concrete technology. it has many types and small dosage. it plays a key role in toughening concrete. concrete admixtures often have what classification? qingdao dingchang new materials explains for you:
classified according to (gb8075-87), concrete admixtures can be divided into four categories according to their key functions
1. water-reducing agents that improve the mixing properties of concrete: including various types of water-reducing agents, air-entraining agents and pumping agents.
2. water-reducing agents that adjust the initial setting time of concrete and hardening properties: including retarder, retardant, accelerating agent, etc.
3. water-reducing agents that improve the performance of concrete: including air-entraining agents, waterproof coatings, and rust inhibitors.
4. improve other characteristics of concrete water reducing agent: including air entraining agent, expansion agent, antifreeze agent, colorant, waterproof coating and pumping agent, etc.
according to the naming and definition of (gb8075-87) water-reducing agents, water-reducing agents can be divided into 16 names, and their respective definitions are given
1. general water-reducing agent: a water-reducing agent that can reduce the mixing water requirement under the same conditions as the concrete slump;
2. slow n coagulant: a water-reducing agent that accelerates the initial strength transformation of concrete;
3. retarder: a water-reducing agent that increases the initial setting time of concrete;
4. air-entraining agent: a water-reducing agent that can introduce a large number of jointly distributed, smooth and open fine bubbles in the concrete mixing process;
5. high-efficiency water-reducing agent: a water-reducing agent that can drastically reduce the water demand of the mixture under consistent conditions of concrete collapse;
6. early-strength water-reducing agent: a water-reducing agent that has both early-strength and water-reducing effects;
7. delay condensing water-reducing agent: a water-reducing agent that has both retarding and water-reducing effects;
8. air-entraining water-reducing agent: it has both air-entraining and water-reducing properties. water reducing agent;
9. waterproof coating: water reducing agent that can reduce the water absorption of concrete under hydrostatic pressure;
's processing technology, quality management, application technology, and type selection are very important compared with other construction materials. concrete admixtures are widely used. at this stage, water-reducing admixtures have been called concrete admixtures. the sixth constituent material of soil.
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