Preparation process of hydraulic anti-crack low-shrinkage high-performance concrete and preparation device

Abstract

The invention relates to the technical field of concrete, and particularly discloses a preparation process of hydraulic anti-crack low-shrinkage high-performance concrete and a preparation device. The preparation device comprises a bottom machine frame, a top end machine frame, a stirring and mixing device, an aggregate screening and quantitative discharging device, a cement quantitative feeding device, an auxiliary material quantitative feeding device and a control machine cabinet, the top end machine frame is arranged at one end of the upper surface of the bottom machine frame, and the stirring and mixing device is fixedly mounted on the bottom machine frame. The prepared concrete has the excellent characteristics of low shrinkage rate and high crack resistance, meanwhile, the concrete preparation device has the functions of screening fine aggregate and accurately weighing the fine aggregate, a redesigned stirring assembly can fully stir all components of the concrete, and the property of the prepared concrete is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of concrete, and specifically discloses a preparation process and a preparation device for hydraulic crack-resistant low-shrinkage high-performance concrete. Background technique [0002] In recent years, with the increasing investment in infrastructure construction of water conservancy projects, the commercial concrete currently on the market has high shrinkage and poor crack resistance. There is a difference between the actual ratio of the components and the theory; at the same time, the concrete is uneven during the mixing process, which makes the concrete vulnerable to the influence of the external environment during use, which leads to the expansion of concrete micro-cracks, and the intrusion of harmful substances causes concrete deterioration , reduce the durability of concrete and affect the service life of concrete structures. [0003] The invention patent with the application number of 202011067218...

AI Technical Summary

Problems solved by technology

In this invention, a water tank is provided on the top side of the mixing tank, and a water distribution block is provided at the bottom of the water tank. The bottom of the water distribution block is slid and connected to a water distribution pipe in the vertical direction through a return spring, and a driving folding rod is fixedly connected to the middle of the water distribution pipe. The water distribution pipe is provided with a connection hole on the side above the driving folding rod. The total motor drives the end face cam to rotate through the third belt transmission structure. The water tank can intermittently provide the water required for the mixing process through the water distribution pipe and the water inlet pipe, so that the concrete is fully mixed and the main properties of the concrete are greatly improved; however, the concrete mixing device does not have a precise control of the weight of raw materials The components need to be manually weighed by the operator, resulting in a deviation between the actual ingredients and the theory. Moreover, the mixing effect of the mixing device is average. It takes a long time to mix thoroughly to achieve uniform mixing, which reduces the production efficiency of concrete.

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