C250 reactive powder concrete capable of preventing high-temperature burst as well as preparation method and molding maintenance method of C250 reactive powder concrete

Abstract

The invention discloses C250 reactive powder concrete capable of preventing high-temperature burst as well as a preparation method and a molding maintenance method of the C250 reactive powder concrete. The invention belongs to the field of civil engineering. The technical problems that existing concrete is low in strength, a preparation method of high-strength concrete is immature, and high-temperature burst is likely to happen are solved. The product is prepared by stirring cement, silica fume, slag, quartz sand, quartz powder, steel fibers, a water reducing agent and water. The molding maintenance method is carried out by adopting a mode of steam maintenance and dry heat maintenance in sequence. The compressive strength of the C250 reactive powder concrete can reach 250 MPa, the C250 reactive powder concrete has wide application value in dome structures and arch structures mainly under pressure, the structural span can be obviously increased, and the structural manufacturing cost isreduced. The water content is lower than 0.4-0.5%, RPC high-temperature bursting can be effectively avoided, and the fire safety of the structure is obviously improved. In addition, the maintenance time is saved, the construction cost is reduced, and application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a high-temperature burst-proof C250 active powder concrete and a preparation and molding maintenance method thereof. Background technique [0002] With the large concentration of modern urban population and the rapid economic development, super high-rise and super-long-span building structures have been built and used in large numbers. my country is in the stage of rapid urbanization, and the construction industry is booming, but now there is a shortage of building materials such as river sand and coarse aggregate. The vertical load borne by the frame columns on the ground floor is increasing. In order to avoid problems such as excessively large frame column sections, excessive usable area, and short columns with a shear-span ratio of less than 2 due to the use of ordinary concrete, the use of super High-strength and high-performance materials can significantly improve...

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problems that the existing concrete strength is low, the preparation method of high-strength concrete is immature and prone to high-temperature bursting, and provides a high-temperature bursting-resistant C250 active powder concrete and its preparation and molding maintenance method