Steel pipe gypsum mortar and waste concrete combined column and preparation method thereof

Abstract

The invention discloses a steel pipe gypsum mortar and waste concrete combined column. The steel pipe gypsum mortar and waste concrete combined column is characterized by comprising a steel pipe, and gypsum mortar and a waste concrete block which are filled into the steel pipe, wherein the two ends of the steel pipe are sealed by end plates; a plurality of tamping holes are arrayed on a side wall of the steel pipe; a plurality of longitudinal steel bars are uniformly distributed in the circumference of the inner wall of the steel pipe. The invention further discloses a method for preparing the steel pipe gypsum mortar and waste concrete combined column. The steel pipe gypsum mortar and waste concrete combined column prepared by the invention has the characteristics of rapid hardening and early strengthening, and can rapidly reach a bearing capability; the strength of a member is mainly provided by a waste concrete block framework, so that the material cost can be reduced; furthermore, the gypsum mortar is only used as a cementing material and a joint filling material, and the outer part is restrained by the steel pipe, so that the determination of a weak interface between the gypsum mortar and the waste concrete block can be weakened, and the strength and ductility of the member are greatly improved.

Description

technical field [0001] The invention relates to a steel pipe gypsum mortar waste concrete composite column and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, the demolition, reconstruction and repair of villages and towns, the continuous development and large-scale construction of new urban areas and residential quarters, and the new construction of municipal public facilities will generate a large amount of construction waste. In addition, some building structures in our country are about to reach the design service life. According to statistics, my country's annual demolition projects account for 40% of the total construction projects, and every 10,000 square meters of demolition projects will generate 7,000-12,000 tons of construction waste. Using crushed construction waste as recycled aggregate can not only solve the shortage of natural aggregate resources, realize the regeneration and recycling of co...

AI Technical Summary

Problems solved by technology

The current waste concrete composite columns are generally filled with waste concrete blocks, cement, coal ash and other materials in steel pipes. This kind of composite columns has disadvantages such as slow setting speed and poor early strength, and the bonding strength between filling materials and steel pipes is poor.

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