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Gypsum self-leveling material with high water-retaining property and preparation method thereof

A self-leveling and water-retaining technology, applied in the field of building materials and mortar, can solve the problems of poor mortar water retention, low mortar strength, poor mortar cohesion, etc., achieve good water retention and workability, stable mortar system, and ensure construction sexual effect

Active 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

[0004] The water retention of gypsum self-leveling mortar is an important performance index of mortar. If the water retention rate of mortar is poor, bleeding will occur in the mortar, and the mortar will be delaminated after adding water and stirring, resulting in poor cohesion and poor operability of the mortar; due to the gypsum itself Air-hardness characteristics, bleeding has a great influence on the strength of the mortar, the mortar is bleeding, the mortar strength is low after drying, and it is prone to ash and sand loss

Method used

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  • Gypsum self-leveling material with high water-retaining property and preparation method thereof

Examples

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Effect test

Embodiment 1

[0053] Take 40 parts by weight of high-strength gypsum, 15 parts by weight of 40-70 mesh river sand, 20 parts by weight of 70-140 mesh river sand, 8 parts by weight of heavy calcium with a particle size of 400 meshes, and 8 parts by weight of slag Portland cement with a strength grade of 32.5 , 7 parts by weight of nano ultrafine calcium carbonate with a particle size of 0.1 μm, and 2 parts by weight of Wacker Chemical 5010N rubber powder; 0.02 parts by weight of the produced cellulose ether water-retaining agent MH300P2, 0.008 part by weight of the retarder 200P produced by Sika, and 0.04 part by weight of the defoamer P8850 produced by AGITAN, Germany, were used to form the admixture. Mix the main material and the admixture evenly to prepare a gypsum self-leveling material with good water retention, and mix the prepared gypsum self-leveling material with water in a weight ratio of 1:0.23 to make a gypsum self-leveling mortar with good water retention .

Embodiment 2

[0055] Take 45 parts by weight of building gypsum, 10 parts by weight of 40-70 mesh ore sand, 20 parts by weight of 70-140 mesh ore sand, 10 parts by weight of 300 mesh heavy calcium, and 5 parts by weight of ordinary Portland cement with a strength grade of 42.5. 9 parts by weight of nanometer ultrafine calcium carbonate with a diameter of 0.02 μm and 1 part by weight of Wacker Chemical 5044N rubber powder are the main ingredients; 0.10 part by weight of polycarboxylic acid water reducing agent LonS-P(H) produced by Zhejiang Longsheng Company , 0.04 parts by weight of cellulose ether water-retaining agent MH300P2 produced by Shin-Etsu Company of Japan, 0.010 parts by weight of retarder PE produced by SICIT 2000 Company of Italy, and 0.04 parts by weight of antifoaming agent P88566 produced by AGITAN, Germany to form admixtures. Mix the main material and the admixture evenly to prepare a gypsum self-leveling material with good water retention, and mix the prepared gypsum self-l...

Embodiment 3

[0057] Take 25 parts by weight of high-strength gypsum, 25 parts by weight of building gypsum, 9 parts by weight of 40-70 mesh sand, 21 parts by weight of 70-140 mesh sand, 8 parts by weight of 300 mesh heavy calcium, and a common silicate with a strength grade of 52.5 6 parts by weight of cement, 7 parts by weight of nano-ultrafine calcium carbonate with a particle size of 0.05 μm, and 1 part by weight of Wacker Chemical 5010N rubber powder are the main ingredients; the polycarboxylate water-reducing agent LonS-P produced by Zhejiang Longsheng Company is taken as the main ingredients. (H) 0.15 parts by weight, cellulose ether water-retaining agent MH300P20.05 parts by weight produced by Shin-Etsu Corporation of Japan, 0.012 parts by weight of retarder P produced by Italian SICIT 2000 company, and 0.06 parts by weight of defoamer P8856 produced by AGITAN, Germany admixtures. Mix the main material and the admixture evenly to prepare a gypsum self-leveling material with good wat...

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Abstract

The invention provides a gypsum self-leveling material with high water-retaining property and a preparation method thereof. Raw materials of the gypsum self-leveling material comprise nanometer ultrafine calcium carbonate; the particle size of the nanometer ultrafine calcium carbonate is 0.02-0.1 micrometers. Optionally, the gypsum self-leveling mortar comprises the following raw materials of: gypsum clinker, sand, coarse whiting, cement, nanometer ultrafine calcium carbonate, rubber powder, a water reducing agent, a water retaining agent, a retarder and a defoaming agent. When the gypsum self-leveling material is used for preparing gypsum self-leveling mortar, the weight ratio of the gypsum self-leveling mortar to water is 1: (0.23-0.28); the self-leveling mortar material provided by theinvention endows mortar with good flexibility, so that a mortar system is more stable, and the fluidity of the mortar in a stirring process and the smoothness of construction are improved. Besides, moisture in the mortar is not easy to lose and is gradually released within a long period of time, so that the mortar is endowed with a good water-retaining property and workability.

Description

technical field [0001] The present application relates to the technical field of building materials and the technical field of mortar, and in particular, to a high water-retention gypsum self-leveling material and a preparation method thereof. Background technique [0002] The traditional artificial floor construction is to chisel the concrete floor and then manually level it or use cement self-leveling mortar to level it. Manual leveling has high labor cost and low construction efficiency; cement self-leveling mortar has high energy consumption, high mortar weight and rigidity, resulting in large building load and poor comfort, and mortar is prone to cracking. [0003] Gypsum self-leveling mortar is a new type of mortar product in China. It is made of gypsum as the base material, compounded with fillers, aggregates and admixtures. It has good fluidity, dimensional stability and comfort, and can overcome cement The disadvantage of mortar is the best choice for building leve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/146C04B28/147C04B2111/00008C04B2201/50C04B14/068C04B14/28C04B7/14C04B2103/0045C04B24/24C04B24/383C04B2103/22C04B2103/50C04B14/06C04B7/02C04B22/143
Inventor 张晓菲陈红霞杨潇刘文君葛俊巧冉秀云
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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