Gypsum-based machine-sprayed mortar and preparation method thereof, and gypsum-based machine-sprayed mortar

A machine-sprayed mortar and gypsum-based technology, which is applied in the field of gypsum-based machine-sprayed mortar and its preparation, and gypsum-based machine-sprayed fabric slurry, which can solve the problems of low cement-based mortar adhesion, peeling off of the plaster layer, and hollow walls, etc. , to achieve high strength, delayed setting time, and good sound insulation performance

Active Publication Date: 2021-09-21
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its own material defects, cement-based plastering mortar often has quality problems such as wall hollowing, cracking, and peeling off of the plaster layer. At the same time, due to the low adhesion of cement-based mortar, it is necessary to apply interface agents or Shotcrete treatment is labor-intensive and time-consuming

Method used

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  • Gypsum-based machine-sprayed mortar and preparation method thereof, and gypsum-based machine-sprayed mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) 100g of α high-strength gypsum (80 mesh) prepared from desulfurized gypsum, 10g of 32.5# ordinary Portland cement, 0.15g of hydroxypropyl methylcellulose ether, high-efficiency gypsum-based retarder Retardan P (purchased from German TRICOSAL company) 0.01g, water reducer R+D Melflux ECO 5691F (purchased from BASF) 0.03g, redispersible latex powder 5010N (purchased from Wacker Company) 1g, Class II fly ash 5g, river sand 50g, (NH 4 ) 2 SO 4 0.05g, 90-100mm standard consistency of mortar, mixing water.

[0060] (2) During construction, put the above-mentioned premixed powder components (other substances except the coagulation-adjusting enhancer and mixing water) into the mixer and mix for 2-3 minutes, and then put them into mechanical spraying equipment; (NH 4 ) 2 SO 4 Use an appropriate amount of mixing water to dissolve and prepare a coagulation-adjusting enhancer solution; when it is about to spray, add the coagulation-adjusting enhancer solution and the re...

Embodiment 2

[0063] (1) 100g of α high-strength gypsum (80 mesh) prepared from desulfurized gypsum, 20g of 32.5# ordinary Portland cement, 0.15g of hydroxypropyl methylcellulose ether, high-efficiency gypsum-based retarder Retardan P (purchased from German TRICOSAL company) 0.01g, water reducer R+D Melflux ECO 5691F (purchased from BASF) 0.05g, redispersible latex powder 5010N (purchased from Wacker Company) 1g, Class II fly ash 5g, river sand 60g, (NH 4 ) 2 SO 4 0.05g, 90-100mm standard consistency of mortar, mixing water.

[0064] (2) During construction, put the above-mentioned premixed powder components into a mixer and mix and stir for 2-3min, then put them into mechanical spraying equipment; put the (NH 4 ) 2 SO 4 Use an appropriate amount of mixing water to dissolve and prepare a coagulation-adjusting enhancer solution; when it is about to spray, before the premixed powder passes through the nozzle of the mechanical spraying equipment, add the coagulation-adjusting enhancer s...

Embodiment 3

[0067] (1) 100g of α high-strength gypsum (80 mesh) prepared from desulfurized gypsum, 30g of 42.5# ordinary Portland cement, 0.15g of hydroxypropyl methylcellulose ether, high-efficiency gypsum-based retarder Retardan P (purchased from German TRICOSAL company) 0.01g, water reducer R+D Melflux ECO 5691F (purchased from BASF) 0.04g, redispersible latex powder 5010N (purchased from Wacker Company) 1g, Class II fly ash 5g, river sand 80g, CaSO 4 2H 2 O 0.05g, mixing water of standard consistency of 90-100mm mortar.

[0068] (2) During construction, put the above-mentioned premixed powder components into a mixer and mix and stir for 2-3min, then put into mechanical spraying equipment; 4 2H 2 O Dissolve with an appropriate amount of mixing water to prepare a coagulation-adjusting enhancer solution; when it is about to spray, add the coagulation-adjusting enhancer solution and the remaining mixing water to the premixed powder, and spray it through the nozzle after mixing evenly ...

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Abstract

The application discloses a gypsum-based machine-sprayed mortar and a preparation method thereof, and a gypsum-based machine-sprayed mortar. The gypsum-based machine-blast mortar includes desulfurized gypsum, setting-adjusting enhancer, cement, water-retaining agent, retarder, water-reducing agent, latex powder, fly ash and aggregate; the preparation method includes: removing the setting-adjusting enhancer Mix other components except the agent to obtain premixed powder; prepare the coagulation-adjusting enhancer with water into a solution; add the coagulation-adjusting enhancer solution and water before the premixed powder passes through the nozzle of the mechanical spraying equipment; the gypsum-based machine spray The rendering slurry comprised the gypsum-based machine-blasted mortar described above and water. The setting time of the gypsum-based machine-sprayed mortar of the present application can be delayed to the greatest extent before passing through the nozzle, and it can be quickly condensed after passing through the nozzle. Good compatibility, easy to adjust and control.

Description

technical field [0001] The present application relates to, but not limited to, the technical field of new building materials, and particularly relates to, but not limited to, a gypsum-based machine-sprayed mortar, a preparation method thereof, and a gypsum-based machine-sprayed plastering surface slurry prepared from the gypsum-based machine-sprayed mortar. Background technique [0002] Plastering mortar can be divided into two categories: cement-based and gypsum-based according to the main cementitious material. Due to its own material defects, cement-based plastering mortar often has quality problems such as wall hollowing, cracking, and peeling off of the plaster layer. At the same time, due to the low adhesion of cement-based mortar, it is necessary to apply interface agents or Shotcrete treatment is labor-intensive and time-consuming. Gypsum-based plastering mortar usually refers to ready-mixed dry-mixed mortar with gypsum as the main cementitious material, mainly incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/00017C04B2201/20C04B2201/50C04B7/02C04B24/383C04B2103/22C04B2103/0057C04B18/08C04B14/06C04B22/142C04B22/143C04B28/14
Inventor 王丽
Owner BEIJING NEW BUILDING MATERIALS PLC
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