Using Admixture Should Be Attentive Matters

Concrete admixture is one of must be considered matter when use concrete mixers and concrete mixing plants. The correct use of admixture is very important.
During the test and practice, it has been found that although add admixture in concrete can improve the technical performance of concrete to obtain significant economic effect. However, correct and reasonable use has important effects on economic effect of admixtures. If use improperly, it can lead to accidents. Therefore, when you are using additives, should pay attention to the following several points:
(1) The selection of admixture
Admixture variety many, the effect varies, especially different effects to varieties of cement. When you are selecting admixture, should be based on project needs, material conditions on the ground, and refer to relevant information, determined through testing.
(2) Determination of admixture proportion
Concrete admixture all has the appropriate amount, the mixing amount is too small, often fall short of the desired effect; quantity is too large, it may cause the waste, sometimes affect concrete quality, or even cause quality accidents. Therefore, it should determine the best proportion through the test.
(3) Adulteration method of admixture
Different admixture adulteration into concrete method, the effect is different. For example water reducer used latter adulteration is better than fore and together adulteration, its mix quality is half of two other methods. So-called fore mixed method is that put water reducer agent and cement mixing then mixed with aggregates and water mixed together; same mixing is reducing agent dissolves in water to form solution before joining in the mix mixed together; latter adulteration refers to the concrete mix to placement site, joins the reducing agent to pour and stir again. Therefore, when you use the additive based on project characteristics, materials and conditions to determine through testing.