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Alkali-free and chlorine-free liquid concrete accelerating agent as well as preparation method and application thereof

A technology for concrete and quick-setting admixture, applied in the field of concrete quick-setting admixture, can solve the problems of late strength loss, long-term delamination, etc., and achieve the effects of low equipment requirements, low cost, and simple preparation method

Active Publication Date: 2011-11-02
BEIJING ZHONGYANYI ENG TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to overcome the shortcomings of the existing powder accelerators and alkaline accelerators, and solve the problems of long-term stratification and strength loss of the non-alkali liquid accelerators on the market, the present invention provides an Alkali-free and chlorine-free liquid concrete quick-setting agent with low strength and no loss or less loss in the later period

Method used

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  • Alkali-free and chlorine-free liquid concrete accelerating agent as well as preparation method and application thereof
  • Alkali-free and chlorine-free liquid concrete accelerating agent as well as preparation method and application thereof
  • Alkali-free and chlorine-free liquid concrete accelerating agent as well as preparation method and application thereof

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preparation example Construction

[0085] Determine the preparation method of alkali-free and chlorine-free liquid concrete quick-setting agent of the present invention according to above-mentioned test result, wherein optimize following steps:

[0086] 1. The rate of addition of the inorganic acid in step 3) should be controlled within a certain period of time. If the addition time is too short, the dissolution of the aluminum salt will not be complete. If the addition time is too long, the corresponding cost will be increased. Therefore, the addition of the inorganic acid in step 3) The dropping speed control is 1-3 hours;

[0087] 2. In step 4), the complexing agent, alcohol amine, and organic alcohol need to be added to the reaction solution in sequence. Reversing the order of addition will easily destroy the realization of the reaction process. Therefore, in step 4), the complexing agent, alcohol amine must be sequentially added to the reaction solution and organic alcohols;

[0088] 3. The reaction tempe...

Embodiment 1-7

[0089] Embodiment 1-7, formula and preparation of liquid concrete quick-setting agent

[0090] The formula of embodiment 1-7 liquid concrete quick-setting agent of the present invention is as shown in table 3, is prepared by aforementioned method, and wherein important parameter is listed in table 3:

[0091] Table 3 Preparation Example 1-7 liquid concrete quick-setting agent (unit: part)

[0092]

[0093] After testing, the alkali-free and chlorine-free liquid concrete accelerator of the present invention is a colorless transparent liquid, acidic, with a solid content of 15%-50%, a pH value of 2-3, and a density of 1.1-1.4g / cm 3 (related to the solid content of the product).

[0094] Test 2. Test of the effect of liquid concrete quick-setting agent on the setting time of cement paste

[0095] According to the requirements of the Chinese building materials industry standard JC477-2005 "Accelerator for Shotcrete", the liquid concrete accelerator prepared in Examples 1-7 wa...

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Abstract

The invention discloses an alkali-free and chlorine-free liquid concrete accelerating agent as well as a preparation method and an application thereof. The product disclosed by the invention comprises the following components in parts by weight: 34-41 parts of aluminum salt, 0-5 parts of inorganic acid, 2-10 parts of organic alcohol, 0.2-2 parts of alcohol amine, 0.2-2 parts of coordination agentand 9-59 parts of water. The alkali-free and chlorine-free liquid concrete accelerating agent disclosed by the invention plays an important role in engineering such as sprayed concrete and sprayed mortar of various wells, tunnels, culverts, supports and other underground engineering, concrete emergency repair engineering, anchoring, sealing and plugging engineering and the like, and has wide application prospects.

Description

technical field [0001] The invention belongs to the concrete quick-setting agent in the field of building materials, in particular to a non-alkali and chlorine-free liquid concrete quick-setting agent and its preparation method and application. Background technique [0002] In recent years, disasters such as landslides, mudslides, and tunnel collapses have occurred frequently. The problems of pre-disaster prevention and post-disaster rapid repair have attracted the attention of the government and more scholars. The use of shotcrete technology for slope repair, surrounding rock support, roadway repair and reinforcement, leakage plugging, and rapid road repair and reinforcement is undoubtedly the best way to solve this problem. [0003] Shotcrete is a kind of quick-setting concrete. The accelerator has an important influence on the setting speed of concrete. It is an indispensable additive in the construction method of shotcrete. The quality of its effect directly affects the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12
CPCC04B40/0039C04B2103/0086C04B22/148C04B24/023C04B24/122C04B22/085C04B22/16C04B24/02C04B24/123
Inventor 马忠诚汪澜
Owner BEIJING ZHONGYANYI ENG TECH DEV CENT
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