Gypsum-base hydraulicity composite gel material and preparation method thereof

A composite cementitious material and water-based technology, which is applied in the field of building materials, can solve the problems of poor water resistance of gypsum and limited application range of gypsum materials, and achieve the effects of increased strength, good water resistance, and convenient operation

Inactive Publication Date: 2008-07-09
HARBIN INST OF TECH
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the application range of gypsum materials is severely limited due to the poor water resistance of gypsum although the natural gypsum reserves in my country are abundant; and a kind of gypsum-based hydraulic composite gelling material and its preparation method are provided

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific Embodiment 1: The gypsum-based hydraulic composite gelling material of this embodiment is composed of 60-80 parts of dihydrate gypsum, 15-35 parts of active mineral admixture and 4-6 parts of alkaline activator according to the ratio of parts by weight. .

[0009] Carry out water resistance test to the gypsum-based hydraulic composite cementitious material of the present embodiment:

[0010] Refer to the test method of cement, and place the molded specimen in the air for moisturizing and curing. The formwork was removed after one day, and the flexural strength and compressive strength were tested for one day. The rest of the specimens were immersed in water, and were taken out of the water at 3 days, 7 days, and 28 days respectively, and the surface water was wiped off to test the compressive strength of the corresponding ages. The test results are shown in Table 1. It can be seen that the gypsum-based hydraulic composite gelling material of this embodiment h...

specific Embodiment approach 2

[0014] Specific embodiment 2: The gypsum-based hydraulic composite gelling material of this embodiment is composed of 65-75 parts of dihydrate gypsum, 20-30 parts of active mineral admixture and 4.5-5.5 parts of alkaline activator in parts by weight .

specific Embodiment approach 3

[0015] Embodiment 3: The gypsum-based hydraulic composite gelling material of this embodiment is composed of 70 parts of dihydrate gypsum, 25 parts of active mineral admixture and 5 parts of alkaline activator in parts by weight.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

Disclosed are gypsum based hydraulic composite cementing material and a process for preparing the material, which relate to inorganic hydraulic cementing material and a process for preparing the material. The invention resolves the problem that natural gypsum reserve is rich in China, but range of application of the gypsum material is limited badly due to bad water resistance of the gypsum. The gypsum based hydraulic composite cementing material of the invention is composed of dehydrate gypsum, active mineral admixtures and alkali-excitant. The process for preparing the material comprises as follows: firstly, drying the natural gypsum and the industrial waste gypsum and removing free water below 80-105 DEC G, second, obtaining the dehydrate gypsum, the active mineral admixtures and the alkali-excitant, then abrading respectively the dehydrate gypsum, the active mineral admixtures and the alkali-excitant till specific surface area reaching 350-400m2 / kg and mixing the dehydrate gypsum, the active mineral admixtures and the alkali-excitant uniformly, thereby achieving the gypsum based hydraulic composite cementing material. The invention has the advantages of simple process, convenient operation, cost-saving, and effective use of the natural gypsum, and the product of the invention has sound water resistance.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to an inorganic hydraulic gelling material and a preparation method thereof. Background technique [0002] Gypsum (CaSO 4 2H 2 O or CaSO 4 1 / 2H 2 O) is a traditional air-hardening gelling material. Due to its main component CaSO 4 2H 2 O or CaSO 4 1 / 2H 2 O is soluble in water, causing the material to have poor water resistance and cannot be used in water or in a humid environment. my country has abundant reserves of natural gypsum, but the application range of gypsum materials is severely limited due to the poor water resistance of gypsum. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the application range of gypsum material is severely limited due to the poor water resistance of gypsum although the natural gypsum in my country is rich in reserves; and to provide a gypsum-based hydraulic composite gelling material and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): C04B28/14C04B14/36C04B22/06
Inventor马新伟
OwnerHARBIN INST OF TECH