Method for calculating carbonization depth of recycled coarse aggregate concrete under load

Abstract

The invention discloses a method for calculating the carbonization depth of recycled coarse aggregate concrete under a load, which comprises the following steps of: 1, judging whether the stress borneby the recycled coarse aggregate concrete is tensile stress or compressive stress according to a structure construction drawing; 2, determining the stress ratio of the recycled coarse aggregate concrete according to the dead load and live load data of the structure; 3, determining the carbonization time of the recycled coarse aggregate concrete; 4, obtaining basic parameters of the environment where the movable recycled coarse aggregate concrete is located through data measurement; and 5, predicting the carbonization depth of the recycled coarse aggregate concrete under the load through a calculation formula of the carbonization depth of the recycled coarse aggregate concrete. According to the method for calculating the carbonization depth of the recycled coarse aggregate concrete under the load, the influence of the combined action of the load and carbonization on the carbonization depth of the recycled coarse aggregate concrete is considered, and the carbonization depth of the recycled coarse aggregate concrete under the action of the load can be accurately and effectively predicted.

Description

technical field [0001] The invention relates to the technical field of evaluating recycled coarse aggregate concrete, in particular to a method for calculating carbonation depth of recycled coarse aggregate concrete under load. Background technique [0002] As a new type of environmentally friendly building material, recycled concrete is gradually being used in construction projects. At the same time, recycled concrete has good social and environmental benefits, and has attracted widespread attention. Due to the defects of recycled concrete itself, its structural performance and durability are lower than those of ordinary concrete with the same water-cement ratio and the same mix ratio, especially the carbonation resistance in the durability performance. In actual construction projects, most concrete structures are subjected to various loads, and there is basically no no-load state, and the load and carbonation of the building occur simultaneously. Academician Sun Wei once ...

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Problems solved by technology

"Academician Wu Zhongwei also pointed out: "Durability research itself has shortcomings, such as the habit of single damage factor research experiment, which is out of touch with the combined effect of multiple factors in actual engineering, lack of organization and connection in work, and a lot of duplication of labor; using incorrect simplification, Extrapolation, induction or even exaggeration methods, no useful conclusions can be obtained

At present, it is unanimously recognized that the carbonation depth of ordinary concrete is proportional to the square root of the carbonation time, but the carbonation depth prediction model of recycled concrete is still inconclusive

In addition, there are few studies on the prediction model of carbonation depth of recycled coarse aggregate concrete under load.

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