According to a large amount of data and practice, the blockage of pump pipeline is the most common problem in super high-rise structure concrete pumping.
In order to ensure the environmental protection of the quarry, equipment investors or operators usually take a variety of ways to improve the environment of the quarry. This article will introduce common environmental protection measures in quarries.
The complete sand production system can produce manufactured sand for high-performance concrete. It must have the following five indicators
Bulk materials are sieved through a process in which one or more layers of screen surfaces are divided into different sizes. The screening of materials on the screen of the vibrating screen can be roughly divided into two processes.
In view of the above characteristics of the sand and aggregate processing plant, the key to the process design is to make a comparison of various plans. Designed from the perspectives of the stability of production and operation (dry method, wet method and combination of dry and wet), product quality stability (selection of auxiliary equipment such as crushing, screening, sand making equipment, conveying equipment), investment cost and operating cost Develop the optimal process plan.
High-strength concrete has a low water-binder ratio and a large amount of cementitious materials, which leads to an increase in hydration temperature, so plastic shrinkage and self-shrinkage. Although high-strength concrete has a higher tensile strength, it has a high elastic modulus, which will cause higher tensile stress under the same shrinkage and deformation, so the risk of cracking in the early stage and during use cannot be ignored.
Manufactured sand（M-sand） is also called machine-made sand, which is made by mechanical crushing and screening. Rocks, mine tailings or industrial waste slag particles with a particle size of less than 4.75 mm.
The shape characteristics of aggregate directly affect the performance of concrete. The crushing equipment is the main factor that produces these shape characteristics.
Mud content refers to the content of fine particles with a particle size of less than 75μm in sand, its mineral composition and chemical composition are different from those of the parent rock, and with relatively strong adsorption.
In crushing plant, vibrating screen is very important auxiliary equipment. In this article, we mainly introduce factors to affect the reliability of a vibrating screen.