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L-A-S-H nanogel precursor for inhibiting alkali-aggregate reaction, preparation method and application thereof

A technology of L-A-S-H and nano gel, which is applied in the research field of inhibiting alkali-aggregate reaction, can solve the problems of affecting the development of slurry strength and insufficient ability to inhibit the expansion of cement slurry, and achieves mature and stable preparation methods, stable dimensions, and no The effect of secondary pollution

Pending Publication Date: 2021-09-07
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of L-A-S-H nanogel precursor and preparation method and application for inhibiting the alkali-aggregate reaction, aiming to solve the problem of existing lithium saline-alkali aggregate inhibitor. , Insufficient ability to inhibit the expansion of cement paste and the problem of affecting the development of paste strength

Method used

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  • L-A-S-H nanogel precursor for inhibiting alkali-aggregate reaction, preparation method and application thereof
  • L-A-S-H nanogel precursor for inhibiting alkali-aggregate reaction, preparation method and application thereof
  • L-A-S-H nanogel precursor for inhibiting alkali-aggregate reaction, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Taking water than 0.5, cement and standard sand mass (glue ratio) 1: 3, does not incorporate the lash nanogel precursor, prepared cement mortar; in the control group, the ingredients, the ingredients, such as shown in Table 1, reference The expansion rate test method (JCT313-2009) is expanded to the cement mortar test piece, the test age is 7d, 14d, 28d, and the test results are shown in Table 2; in the control group, refer to ordinary concrete mechanical performance test method The standard GB / T50081-2016, the mechanical properties of cement mortar test parts, the test age is 7d, 14d, 28d, and the test results are shown in Table 3.

Embodiment 2

[0055] Take water as average ratio 0.5, cement and standard sand mass (glue ratio) 1: 3, incorporated in Lash nanogel precursor with 1% percentage of diamonds, preparing cement mortar, ingredients, such as Table 1 The expansion rate test of the cement mortar test piece (JCT313-2009) is used to expand the cement mortar test piece (JCT313-2009), the test age is 7d, 28d, the test results are shown in Table 2; refer to normal concrete mechanical performance test method GB / T50081 -2016, a mechanical properties of cement mortar test pieces, the test age is 7d, 14d, 28d, and the test results are shown in Table 3.

Embodiment 3

[0057] Taking water than 0.5, cement and standard sand mass (glue ratio) 1: 3, incorporates a lash nanogel precursor with a percentage of diarotes of diamonds, preparing cement mortar, ingredients, such as shown in Table 1 The expansion rate test of the cement mortar test piece (JCT313-2009) is used to expand the cement mortar test piece (JCT313-2009), the test age is 7d, 28d, the test results are shown in Table 2; refer to normal concrete mechanical performance test method GB / T50081 -2016, a mechanical properties of cement mortar test pieces, the test age is 7d, 14d, 28d, and the test results are shown in Table 3.

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Abstract

The invention discloses an L-A-S-H nanogel precursor for inhibiting an alkali-aggregate reaction, a preparation method and application thereof. The L-A-S-H nanogel precursor is prepared from the following components in parts by mass: 15 to 30 parts of lithium hydroxide; 20 to 40 parts of nano silicon dioxide; 20 to 35 parts of nano aluminum oxide; 500 to 1000 parts of deionized water; and 100 to 200 parts of absolute ethyl alcohol. According to the invention, a hydrothermal synthesis method is adopted for preparation, so that the preparation method is mature and stable, the reaction process is simple, operation is convenient, energy consumption is low, treatment is easy, and secondary pollution is avoided; and the L-A-S-H nanogel precursor can effectively inhibit concrete alkali-aggregate reaction, can also effectively inhibit development of microcracks in the concrete, can also play a role in repairing the part subjected to the alkali-aggregate reaction, enables the size of the part to be kept stable, and has important significance for improving the durability of the concrete.

Description

Technical field [0001] The present invention relates to inhibiting alkali - Reaction Field aggregate, in particular, relates to a method for inhibiting alkali - gel precursor aggregate and preparation method and application of the reaction L-A-S-H nanometers. Background technique [0002] Alkali - aggregate reaction caused detrimental swelling, cracking is caused by moving the main concrete dam aging because one of which is known incubation period of up to 60 years (UK Meantwrog dam), known as the "cancer" of concrete. This phenomenon is due to the instability generated aggregate swelling gel in alkaline systems, thereby causing concrete cracking, durability recession, worldwide there is no effective solutions, mainly focusing on prevention. International date engineering concrete base prevention - There are six kinds of measures damage aggregate reaction, from the starting point of the control base - content (alkali, activated silica, water) to provide aggregate reaction and the...

Claims

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Application Information

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IPC IPC(8): C04B24/02C04B22/06C04B14/06C04B14/30C04B22/00
CPCC04B40/0039C04B22/062C04B14/062C04B14/303C04B24/02C04B22/002
Inventor 汪峻峰方媛殷小红何克泽林琛鲁刘磊
Owner SHENZHEN UNIV
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