Modified aggregate, preparation method thereof and concrete applying modified aggregate

Abstract

The invention relates to the field of concrete, in particular to modified aggregate, a preparation method thereof and concrete applying the modified aggregate. The modified aggregate comprises aggregate and an ionic liquid-like phase change energy storage modifier, and the ionic liquid-like phase change energy storage modifier is located in pores in the surface of the aggregate; and the ionic liquid-like phase change energy storage modifier comprises an ionic liquid-like material with a phase change temperature range of 20-38 DEG C. The preparation method comprises the following steps: dipping: dipping the aggregate in a liquid ionic liquid-like phase change energy storage modifier to enable the ionic liquid-like phase change energy storage modifier to enter gaps of the aggregate, taking out the aggregate, and cooling the aggregate to a saturated surface dry state; slurry wrapping: wrapping the surface of the aggregate in the saturated surface dry state with cement-based slurry, forming a layer of shell, and preparing the modified aggregate. Concrete prepared from the modified aggregate has good heat preservation and energy storage effects, and a concrete product prepared from the modified aggregate has good strength.

Description

technical field [0001] The application relates to the field of concrete, in particular to a modified aggregate, a preparation method and concrete using the same. Background technique [0002] With the continuous acceleration of urbanization in my country, high-rise and super high-rise buildings have gradually become mainstream buildings. More and more high-rise buildings not only require building concrete to have lower bulk density, higher specific heat capacity than ordinary materials, excellent thermal insulation and heat storage capacity, but also low cost and low energy loss. [0003] When the building concrete has a certain thermal insulation and heat storage capacity, the wall panels or roofs made of it can have a certain thermal insulation effect on the building, so that the house has a certain effect of warming in winter and cooling in summer. When the outdoor is too cold, it can slow down the heat transfer between the indoor and outdoor, so that the heat transferre...

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Problems solved by technology

[0004] At present, the research on building energy saving in my country started relatively late, and among the currently known materials, phase change energy storage materials have better thermal insulation and heat storage capacity, but the phase change energy storage building materials for building energy saving are still at the exploratory stage. At this stage, most scientific research institutions still mainly focus on the research of some physical and chemical properties of phase change materials.

Moreover, the existing research results of phase change energy storage materials have not been widely applied and industrialized in buildings because of their durability, economy, and energy storage.

For example, at present, liquid paraffin and solid paraffin are used to modify the aggregate to improve its thermal insulation and heat storage capacity, but the thermal insulation and heat storage capacity of the prepared concrete is not high enough to meet the high thermal insulation and heat storage requirements.

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