Technological method for improving performance of coral aggregate based on pre-slurry-wrapping method

Abstract

The invention discloses a technological method for improving the mechanical performance of coral aggregate based on a pre-slurry-wrapping method. The technological method comprises the steps: with the water-binder ratio, the mixing amount of admixtures and the cementing time after slurry wrapping being considered, measuring the apparent density, the water absorption rate and the crushing index of the same batch of coral aggregates; and grouping the same batch of coral aggregates and pre-wrapping the coral aggregates by adopting wrapping slurries with different water-binder ratios, determining the apparent density, the water absorption rate and the crushing index of the coral aggregates again after the slurries and the aggregates are bonded for 7 days and 14 days, and comparing with corresponding data of the original coral aggregates so as to detect whether the pre-slurry-wrapping method improves the mechanical properties of the coral aggregates or not. The invention provides a whole set of technological method for improving the mechanical performance of the coral aggregate based on the pre-slurry-wrapping method, and the technological method has important significance in using the coral aggregate as concrete aggregate and applying the concrete aggregate to ocean island reef reinforced concrete engineering construction.

Description

technical field [0001] The invention relates to the field of reinforced concrete engineering construction on oceanic islands and reefs, in particular to a process for improving the performance of coral aggregates based on a pre-coating grouting method. Background technique [0002] Studies have shown that when the density of coral aggregates is comparable to ordinary aggregates, coral aggregates become the weakest area in concrete, rather than the aggregate-matrix interface transition area in traditional concrete; when the density of coral aggregates is much smaller than When ordinary aggregate is used, even if the water-binder ratio is small, the 28-day compressive strength of concrete is still low. [0003] The pre-coating method can better improve the mechanical properties of coral aggregates in all aspects. The principle is to pre-coat the aggregates by preparing a suitable proportion of slurry to increase the apparent density of coral aggregates and reduce the density o...

AI Technical Summary

Problems solved by technology

However, the coral aggregate has many micropores, the pores are connected and tortuous, and the slurry is not easy to enter the inside of the aggregate, which affects the coating effect.

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