Inulin-containing wet-mixed mortar admixture and application thereof

A wet-mix mortar and admixture technology, which is applied in the application field of inulin as a retarder in wet-mix mortar admixtures, can solve the problems of reduced strength, poor water retention, and increased mortar consistency, and achieve reduced shrinkage deformation, Wide range of sources, good water retention effect

Active Publication Date: 2019-10-25
山东翰辰石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many types of mortar retarders, currently commonly used are sodium lignosulfonate and its derivatives; low molecular weight cellulose and its derivatives; A layer of insoluble film is formed on the surface of the particles, which is difficult to act as a barrier to the hydration of cement mortar and hinders the normal hydration of cement mortar. normal clotting time
In practical engineering applications, it will be found that the setting time of mortar is faster, and sometimes micro-hardening occurs, and a common phenomenon is that after adding a retarder, the consistency of the mortar increases, the setting time becomes longer, the water retention is poor, and the strength decreases.
But the existing retarder can not meet the needs of industry

Method used

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  • Inulin-containing wet-mixed mortar admixture and application thereof
  • Inulin-containing wet-mixed mortar admixture and application thereof
  • Inulin-containing wet-mixed mortar admixture and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Configure the mortar cementitious material according to Table 1, and configure the admixture according to Table 2;

[0034] Test method: mix the admixture into the concrete;

[0035] Result detection: According to the methods in JGJ / T223-2010 and JG / T230-2007 standards, various performance tests are carried out, and the test results are shown in Table 3.

[0036] Table 1 The mix ratio of mortar gel material

[0037]

[0038] Table 2 admixture ratio

[0039]

[0040] The above embodiment performance detection of table 3

[0041]

[0042] Table 3 shows that after adding inulin to the retarder, the operability is significantly enhanced, and the opening time is extended from 24 hours to 37 hours, which fully shows that inulin has strong water retention and stability. It can be seen that inulin can partially replace the retarder in the prior art and be used in wet-mixed concrete.

Embodiment 2

[0043] Example 2 In order to better prove the performance of the inulin of the present invention as a retarder, the retarder of the present invention is used in the patent embodiment 1 scheme whose application number is 201510551349.9, to replace the retarder therein, and then carry out detection. which is:

[0044] Take 100g of papermaking black liquor (Shandong Gaotang Kelin Environmental Protection Technology Co., Ltd.), adjust the pH to 9, heat to 55°C while stirring, add 1g of ferric sulfite, 2g of Russian wood sodium, after cooling, add 2g of dimethyl silicone oil , 10 g of guar gum, 24 g of retarder (sodium pyrophosphate, inulin and calcium lignosulfonate at a mass ratio of 1:1:1) were evenly mixed to obtain a tan lignin-based mortar admixture product. During construction, pour 240g of Portland cement, 218g of fly ash, 1928g of sand and 9g of the above-mentioned lignin-based mortar admixture into a clean mixer, add water while stirring, and follow the basic performance...

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Abstract

The invention discloses an inulin-containing wet-mixed mortar admixture and application thereof, and relates to wet-mixed mortar admixtures. The admixture comprises a retarder, wherein the retarder comprises inulin. It is shown through experimental results that the inulin-added wet-mixed mortar has an operation time of up to 37 hours, needs of the wet-mixed mortar for long-term storage at a construction site are met, and the early strength is not reduced; and prepared mortar is loose and soft, and has good water retention properties, and the water retention rate can reach 98.4%.

Description

technical field [0001] The invention relates to a wet-mix mortar admixture, in particular to a wet-mix mortar admixture containing inulin and its application, that is, the application of inulin as a retarder in the wet-mix mortar admixture. Background technique [0002] Wet-mixed mortar refers to the reasonable preparation of various raw materials (including water), and after factory production, it is transported to the construction site by means of transportation (usually closed tank trucks). Ordinary wet-mixed mortar is transported from the production point to the site for use. Like ready-mixed concrete, it has high requirements on its working performance. It is necessary to ensure a certain operable time (that is, the opening time). After the mortar is mixed with water, it will In the past, it was necessary to have good enough workability, to be able to carry out normal construction and operation, and to meet the requirements of engineering structures for mechanical prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B22/16C04B24/38C04B24/18C04B24/24C04B24/20C04B24/383C04B28/04
Inventor 刘丽超
Owner 山东翰辰石油科技有限公司
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