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Early-strength cement-based phase-change energy storage mortar and preparation method thereof

A phase-change energy storage mortar and cement-based technology, which is applied in the field of civil engineering materials, can solve the problems of poor heat storage capacity and slow growth rate of phase-change energy storage mortar strength, achieve stable strength growth, realize storage and release, and solve Good working effect

Active Publication Date: 2020-06-26
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide an early-strength cement-based phase change energy storage mortar, which solves the problems of slow strength growth rate and poor thermal storage capacity of phase change energy storage mortar in the prior art

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  • Early-strength cement-based phase-change energy storage mortar and preparation method thereof

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preparation example Construction

[0028] The preparation method of early-strength cement-based phase change energy storage mortar is specifically implemented according to the following steps:

[0029] Step 1, according to the sum of the mass percentages being 100%, respectively weigh 67.8%-72.7% of the phase change energy storage mortar base material, 10.9%-17.0% of the fixed phase change material, and 15.2%-16.4% of the mixing water, and pour into the mud In the mortar mixer, stir for 3-5 minutes to obtain a uniformly mixed early-strength cement-based phase-change energy storage mortar material;

[0030] Step 2: Pour the early-strength cement-based phase-change energy storage mortar material into the trial mold for molding, and cure it to the specified age under standard conditions.

[0031] The preparation process of the phase change energy storage mortar base material is as follows:

[0032] Weigh 49.9% of fast-hardening sulfoaluminate cement with a strength grade of 42.5, 49.9% of quartz sand with a finen...

Embodiment 1

[0038] Step 1: Weigh 49.9% of quick-hardening sulfoaluminate cement with a strength grade of 42.5, 49.9% of quartz sand with a fineness modulus of 2.5, 0.03% of polycarboxylate superplasticizer (powder), 0.03% of polycarboxylate superplasticizer (powder), and Lithium 0.11%, boric acid 0.06%, poured into the cement mortar mixer, stirred for 3 minutes, mixed evenly, and obtained the dry powder material of the phase change energy storage mortar base material;

[0039] Weigh respectively 38.4% of low-density polyethylene, 57.7% of phase-change paraffin wax at 20°C, and 3.9% of flake graphite powder according to mass percentage, and pour them into a beaker, and put the beaker into an oil bath of a heat-collecting magnetic stirrer for Heating, set the temperature of the heat-collecting magnetic stirrer to 170°C, and adjust the heat-collecting magnetic stirrer to a low-speed stirring state, wait for the temperature to rise to 170°C and keep it for 20 minutes, then adjust to a high-spe...

Embodiment 2

[0043] Step 1, weigh 49.9% of quick-hardening sulfoaluminate cement with a strength grade of 42.5, 49.9% of quartz sand with a fineness modulus of 2.6, 0.03% of polycarboxylic acid superplasticizer (powder), 0.03% of polycarboxylate superplasticizer (powder), and Lithium 0.11%, boric acid 0.06%, poured into the cement mortar mixer, stirred for 4 minutes, mixed evenly, and obtained the dry powder material of the phase change energy storage mortar base material;

[0044] Weigh respectively 38.4% of low-density polyethylene, 57.7% of phase-change paraffin wax at 20°C, and 3.9% of flake graphite powder according to mass percentage, and pour them into a beaker, and put the beaker into an oil bath of a heat-collecting magnetic stirrer for Heating, set the temperature of the heat-collecting magnetic stirrer to 175°C, and adjust the heat-collecting magnetic stirrer to a low-speed stirring state, wait for the temperature to rise to 175°C and keep it for 23 minutes, then adjust to a high...

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Abstract

The invention discloses early-strength cement-based phase-change energy-storing mortar which is composed of, by mass, 67.8-72.7% of a phase-change energy-storing mortar base material, 10.9-17.0% of ashaping phase-change material, and 15.2-16.4% of blending water, the sum of the mass percentage ratios of the components being 100%. The invention also discloses a preparation method of the mortar. The preparation method includes the steps of: weighing the phase-change energy-storing mortar base material, the shaping phase-change material and the blending water according to ratio, pouring the components into an earth scrap sand stirrer to stir the components to obtain uniformly mixed early-strength cement-based phase-change energy-storing mortar material; pouring the material into a test mouldto shape the material, and maintaining the material under a standard condition to specified age to obtain the phase-change energy-storing mortar. The early-strength cement-based phase-change energy-storing mortar solves the problems of low strength increase speed and poor heat storage capacity of phase-change energy-storing mortar in the prior art.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, and relates to an early-strength cement-based phase-change energy storage mortar, and also relates to a preparation method of the energy storage mortar. Background technique [0002] Phase change energy storage materials have become a research hotspot in the field of building energy-saving materials, among which solar heating buildings are one of the most valuable fields of phase change materials in the construction industry. The reasonable application of phase change materials in solar building envelopes can improve the building's heat storage and thermal regulation capabilities, thereby improving the building's indoor thermal environment quality and reducing building energy consumption. It has performance advantages that traditional building materials cannot match. . Cement concrete and cement mortar are the most used building materials in construction, so it is easier to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B24/36
Inventor 桑国臣曹艳洲刘奉银王文康樊敏朱轶韵赵钦张睿简政
Owner XIAN UNIV OF TECH