Concrete admixture and cement adaptability

The adaptation and incompatibility between the so-called concrete admixture and cement can be considered as follows: When formulating concrete (or mortar), according to the technical specifications of concrete admixture application, a certain admixture that has been tested to meet the relevant standards can be added to the regulations. If the cement using the admixture of the variety can produce the desired effect, the cement is compatible with the admixture. On the contrary, if the effect is not produced, the cement and the admixture are not Compatible.

With the continuous growth of the concrete admixture team and the continuous improvement of performance, there is a practical problem in front of people, that is, there is sometimes an incompatibility between the admixture and the cement, and this unsuitable condition sometimes leads to serious Engineering accidents and immeasurable economic losses. The reasons for the incompatibility between the admixture and the cement are complicated. At present, more than 80% of China's cement is mixed with a certain amount of mixed materials, such as volcanic ash, fly ash, slag powder and coal gangue. Due to the variety, nature and dosage of the mixed materials, the effect of the water reducing agent is also Not the same. The development of admixtures has been more than 60 years old. The successful application of admixtures has brought a real revolution to the development of concrete technology, because the application of admixtures can not only affect the construction of concrete in the new mixing stage, but also from the microscopic At the sub-micro level, the structure of the hardened concrete body is improved, so that the concrete can be modified by means of adding an admixture to meet various requirements in terms of construction performance, mechanical properties and durability.