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Heat-conducting gypsum self-leveling mortar as well as preparation method and application thereof

A self-leveling mortar and gypsum technology, which is applied in the direction of construction, building structure, floor, etc., to achieve the effects of improving thermal conductivity, saving raw material costs, and improving strength

Inactive Publication Date: 2020-09-01
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report of using phosphogypsum instead of cement to produce thermally conductive gypsum self-leveling mortar

Method used

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  • Heat-conducting gypsum self-leveling mortar as well as preparation method and application thereof
  • Heat-conducting gypsum self-leveling mortar as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 1000g of phosphogypsum (pH = 3.2) with 200g of sintered red mud (pH = 10.5) (the pH of the mixture is about 6.8), calcinate at 140°C for 0.5 hours, and then ball mill in a ball mill to obtain Blaine Specific surface area up to 5000cm 2 / g of powder, then add 100g of alumina powder with a particle size of 50-100nm, 200g of blast furnace slag powder of 40 mesh and 80 mesh, 0.8g of sodium citrate, 1.0g of polydimethylsiloxane, 1.0 g of hydroxypropyl methylcellulose ether, 0.5 g of polycarboxylate superplasticizer and 5 g of redispersible latex powder were fully mixed to obtain gypsum mortar powder.

Embodiment 2

[0030] Mix 1000g of phosphogypsum (pH value = 3.2) with 150g of sintered red mud (pH value = 10.5) (the pH of the mixture is about 6.5), calcinate at 120°C for 1 hour, and then ball mill in a ball mill to obtain Blaine Specific surface area up to 4500cm 2 / g powder, and then add 80g of silicon carbide powder with a particle size of 50-100nm, 220g of blast furnace slag powder of 40 mesh and 80 mesh, 0.6g of sodium tartrate, 1.0g of polydimethylsiloxane, hydroxypropyl 0.8 g of methyl cellulose ether, 0.5 g of polycarboxylate superplasticizer and 5 g of redispersible latex powder were fully mixed to obtain gypsum mortar powder.

Embodiment 3

[0032] Mix 1000g of phosphogypsum (pH = 3.2) with 100g of sintered red mud (pH = 10.5) (the pH of the mixture is about 6.2), calcinate at 130°C for 0.5 hours, and then ball mill in a ball mill to obtain Blaine Specific surface area up to 4000cm 2 / g powder, and then add 100g of zinc oxide powder with a particle size of 50-100nm, 240g of blast furnace slag powder of 40 mesh and 80 mesh, 0.6g of citric acid, 1.0g of polydimethylsiloxane, hydroxy 0.8 g of propyl methyl cellulose ether, 0.5 g of polycarboxylate superplasticizer and 5 g of redispersible latex powder were fully mixed to obtain gypsum mortar powder.

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Abstract

The invention discloses heat-conducting gypsum self-leveling mortar as well as a preparation method and application thereof. Raw materials for preparing the heat-conducting gypsum self-leveling mortarcomprise phosphogypsum, red mud and a heat-conducting material, and do not comprise cement. The preparation method comprises the following steps: mixing the phosphogypsum with the red mud, performingcalcining and ball-milling; and mixing the ball-milled phosphogypsum and red mud with the heat conducting material, aggregate, a retarder, a defoaming agent, a water retaining agent, a water reducingagent and redispersible latex powder. The heat-conducting gypsum self-leveling mortar disclosed by the invention realizes resource reutilization of solid wastes, namely the phosphogypsum and red mudon the premise of ensuring good performance, has good heat-conducting performance, can be used for gap filling and upper-layer covering of floor heating pipelines, and greatly saves the raw material cost of a floor heating system.

Description

technical field [0001] This article relates to the field of inorganic building materials, especially a heat-conducting gypsum self-leveling mortar and its preparation method and application. Background technique [0002] Phosphogypsum is an industrial by-product gypsum produced in the production of phosphoric acid. In recent years, its output has been increasing rapidly, and its stockpile is huge. Under the situation that gypsum resources are increasingly depleted, this chemical gypsum will be an important gypsum in the future. Replace new resources and provide sufficient raw materials for future gypsum building materials. [0003] The ground radiant heating (floor heating) system has the advantages of good thermal stability, energy saving and high efficiency, high safety performance, and does not occupy indoor area. In recent years, it is gradually replacing the traditional wall-mounted heating method. market. Floor heating pipe gap filling and upper cladding require floo...

Claims

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Application Information

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IPC IPC(8): C04B28/14E04F15/00
CPCC04B28/143C04B2201/32C04B2201/50E04F15/00C04B18/0409C04B14/303C04B18/142C04B24/06C04B24/42C04B24/383C04B24/24C04B2103/0057C04B14/324C04B14/30
Inventor 朱清玮雷月王苗苗白风华肖文韬李帆陈红霞杨正波
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED