FRP restrained pipe regenerated mixed concrete combination column

Abstract

The invention discloses an FRP (Fiber Reinforced Plastic) restrained pipe regenerated mixed concrete combination column, which comprises an FRP pipe, a steel pipe and a mixture inner core, wherein the mixture inner core comprises regenerated concrete blocks and fresh concrete which are mutually stirred into a whole; the mixture inner core is positioned in the steel pipe; and the steel pipe is positioned in an inner hole of the FRP pipe. The combination column has the following advantages that 1, the compressive strength and the ductility are high; 2, the bending strength and the ductility are high; 3, the durability is high; and 4, the construction is convenient.

Description

technical field [0001] The invention relates to an FRP constrained tube recycled mixed concrete composite column. Background technique [0002] At present, there is a new type of concrete recycling and reuse method, which is to break waste concrete into large-sized concrete blocks and directly mix and vibrate with fresh concrete to form "recycled mixed concrete". This recycling method has the following advantages: (1) The recycling process is simple, efficient, economical and environmentally friendly. Traditional recycled aggregates consume a lot of manpower, material resources and energy during the preparation process, and are accompanied by secondary pollution such as noise; while this new recycling method only needs to break waste concrete into large-sized concrete blocks, which has low energy consumption and lower Carbon friendly. (2) High recovery rate. A large amount of unusable fine aggregate (<3mm) will be produced in the traditional recycled aggregate preparat...

AI Technical Summary

Problems solved by technology

A large amount of unusable fine aggregate (<3mm) will be produced in the traditional recycled aggregate preparation process, and the recovery rate is low; however, this new recycling method produces very little waste fine aggregate, and most of the sand, gravel and Mortar can be recycled

However, the composite columns made by the above-mentioned new concrete recycling method have the following defects: 1. The interface between new and old concrete is relatively weak; 2. The strength of waste concrete is usually low and uneven, which increases the recycled mixing unevenness of concrete

These all lead to poor strength of the composite column

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