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Thickening time control agent used for gypsum mortar, and preparation method thereof

A technology of gypsum mortar and coagulation regulator, which is applied in the field of gypsum mortar admixture, can solve problems such as unfavorable construction operations, and achieve the effect of convenient preparation and application and simple mortar ratio

Active Publication Date: 2014-01-01
俞锡贤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to developing and producing various building mortars with desulfurized gypsum as the cementitious material is to solve the problems of quick setting, fast hardening, and unfavorable construction operations

Method used

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  • Thickening time control agent used for gypsum mortar, and preparation method thereof
  • Thickening time control agent used for gypsum mortar, and preparation method thereof
  • Thickening time control agent used for gypsum mortar, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, a kind of gypsum mortar coagulant, it is made up of the composition of following weight content:

[0035] Anhydrous citric acid 25%, anhydrous sodium pyrophosphate 20%, hydroxypropyl methylcellulose ether (HPMC) 7.5%, sodium tripolyphosphate 5%, pregelatinized starch (modified starch) 10%, sodium base Bentonite 20%, polycarboxylate superplasticizer 10%, inorganic magnesium aluminum silicate gel 2.5%.

[0036] Its preparation method is:

[0037] 1) Put sodium-based bentonite in a heating container and heat to 50-60°C, add hydroxypropyl methylcellulose ether (HPMC) and blend evenly, so as to achieve graft modification of sodium-based bentonite and obtain water-retaining bentonite Modified powder;

[0038] 2) Water-retaining bentonite modified powder, anhydrous citric acid, anhydrous sodium pyrophosphate, sodium tripolyphosphate, pregelatinized starch (modified starch), polycarboxylate superplasticizer and inorganic magnesium aluminum silicate The gel is u...

Embodiment 2

[0039] Embodiment 2, a kind of gypsum mortar coagulation regulator, it is made up of the composition of following weight content:

[0040] Anhydrous citric acid 26.7%, anhydrous sodium pyrophosphate 18%, hydroxypropyl methylcellulose ether (HPMC) 7%, sodium tripolyphosphate 4.5%, pregelatinized starch (modified starch) 10.8%, sodium base Bentonite 21.8%, polycarboxylate superplasticizer 9%, inorganic magnesium aluminum silicate gel 2.2%.

[0041] The preparation method is identical to Example 1.

Embodiment 3

[0042] Embodiment 3, a kind of gypsum mortar coagulant, it is made up of the composition of following weight content:

[0043] Anhydrous citric acid 23.2%, anhydrous sodium pyrophosphate 22%, hydroxypropyl methyl cellulose ether (HPMC) 8%, sodium tripolyphosphate 5.5%, pregelatinized starch (modified starch) 9.2%, sodium base Bentonite 18.3%, polycarboxylate superplasticizer 11%, inorganic magnesium aluminum silicate gel 2.8%.

[0044] The preparation method is identical to Example 1.

[0045] In order to verify the performance of the present invention, the inventor did an experimental test on the gypsum mortar coagulation agent (taking the proportion of gypsum mortar for plastering the bottom layer of M4.0 interior wall plastering as an example), and the results are as follows:

[0046]1. Raw materials and admixtures for testing

[0047] 1. Desulfurization plaster powder

[0048] 2. Heavy calcium powder

[0049] 3. 20-40 mesh machine-made sand

[0050] 4. 40-80 mesh mach...

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Abstract

The invention relates to an additive of gypsum mortar and a preparation method of the additive, and more specifically discloses a thickening time control agent used for gypsum mortar. The thickening time control agent comprises following ingredients, by weight, 23 to 27% of anhydrous citric acid, 18 to 22% of anhydrous sodium pyrophosphate, 7 to 8% of hydroxy propyl methyl cellulose ether, 4.5 to 5.5% of sodium tripolyphosphate, 9 to 11% of pregelatinized starch, 18 to 22% of sodium bentonite, 9 to 11% of polycarboxylate superplasticizer and 2.2 to 2.8% of inorganic aluminum magnesium silicate gel. The thickening time control agent is added into gypsum mortar which is prepared by taking desulfurated gypsum powder as a gelling material, so that thickening time of gypsum mortar can be adjusted by adjustment of the amount of the thickening time control agent according to the difference of construction environment and temperature, and operation time can be prolonged appropriately according to requirements.

Description

technical field [0001] The invention relates to a gypsum mortar additive, in particular to a gypsum mortar coagulation regulator and a preparation method thereof. Background technique [0002] Over the past 30 years of reform and opening up, my country's urban infrastructure construction and new rural construction have been changing with each passing day and achieved remarkable results. In particular, housing construction, which is related to people's living and working in peace and contentment, is unique in ancient and modern China and abroad. Its large scale, wide scope, long duration and huge investment are not comparable to other countries. [0003] For such a huge amount of construction, the materials used are naturally cement, mortar and concrete. As we all know, cement production not only consumes a lot of energy, produces a lot of dust, but also emits a lot of carbon dioxide, which leads to the deterioration of human living environment and serious greenhouse effect,...

Claims

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Application Information

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IPC IPC(8): C04B24/38
Inventor 俞锡贤
Owner 俞锡贤
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