High performance concrete (HPC) aims to achieve high durability and long service life by selecting raw materials and designing mix proportions、 taking into account the flowability of the mixture、 construction technology、 and other aspects、 in order to obtain concrete with high durability and strength. In recent years、 in the preparation of concrete、 finely ground inorganic mineral materials are often used to replace some of the cement、 which has become the sixth component in concrete except for cement、 sand、 stones、 water、 and additives. This inorganic mineral material is called admixture. Admixtures have become a necessary component of high-performance concrete and an important additive for improving the performance of ordinary concrete and extending its service life. External admixtures have the effects of filling、 densifying、 fluidizing、 enhancing、 and improving the durability of concrete. The types of admixtures can be divided into two categories: active admixtures and non active admixtures. The so-called active admixtures mean that these materials contain certain active components、 which can interact with alkaline substances or sulfates under the condition of water supply to generate stable compounds with gelling properties、 such as C-S-H gel and aluminate salt. Granulated blast furnace slag、 volcanic ash、 high-quality fly ash、 burnt shale、 natural zeolite rock、 etc. are all active admixtures、 and materials that do not contain or only contain a small amount of active components are called non active admixtures P>
Function of testing report:
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