Phase change concrete and preparation method thereof

By performing three-stage surface modification on phase change aggregates to form a three-dimensional encapsulation structure, the problems of phase change material leakage and poor interfacial bonding performance in phase change concrete are solved, achieving high stability and high strength of phase change concrete, which is suitable for large-scale application.

CN121318299APending Publication Date: 2026-01-13SHANGHAI CONSTRUCTION GROUP CO LTD
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Patent Information

Application Number
CN202511493888.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-20
Publication Date
2026-01-13

AI Technical Summary

Technical Problem

In the preparation process of existing phase change concrete, the phase change material is prone to leakage and has poor interfacial bonding performance, resulting in reduced compressive strength and durability problems, making it difficult to achieve large-scale application.

Method used

By performing three-stage surface modification on phase change aggregates, a three-dimensional encapsulation structure is formed, including an adsorbed paraffin cloud concrete stone, an inner ultra-high performance mortar layer, a foam mortar layer, and an outer ultra-high performance mortar layer, thereby improving interfacial compatibility and stability.

Benefits of technology

It effectively prevents leakage of phase change materials, improves the overall strength and durability of phase change concrete, and is suitable for large-scale application.

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Abstract

The invention relates to phase change concrete and a preparation method thereof. The concrete comprises the following components by kg / m < 3 >: 450-650 of Yunnan concrete stone; 200 to 400 parts of phase change aggregate; 450 to 550 parts of cement; 40-60 parts of silica fume; 600 to 800 parts of common sand; 5-7 parts of a high-efficiency water reducing agent; and 120 to 140 parts of water. The method comprises the following steps: 1, drying cloud concrete stone needing to pre-adsorb a phase change material in a drying oven until the weight is constant; 2, drying the paraffin phase change material into a liquid state, putting the cloud concrete stone into the liquid paraffin, and carrying out vacuum adsorption; 3, performing third-time modification on the cloud concrete stone after paraffin adsorption by using ultra-high-performance cement mortar twice and foam mortar once respectively; 4, performing saturated surface dry water absorption treatment on the unadsorbed phase-change material cloud concrete stone; and 5, pouring the Yunnan concrete stone, the phase-change aggregate, the cement, the silica fume and the common sand into a concrete mixer, and uniformly mixing to obtain the phase-change concrete.
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