Novel foundation pit waterproof curtain additive material alkali-free liquid accelerator and preparation method thereof

A water-stop curtain and material-adding technology, which is applied in the field of building materials, can solve the problems of concrete cracking and loss of mechanical properties, and achieve the effects of fast setting speed, improved impermeability and waterproof performance, and good adaptability

Inactive Publication Date: 2018-08-03
江苏地基工程有限公司
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Problems solved by technology

The introduction of a large number of sulfate radicals will cause the formation of secondary ettringite in the concrete, which will form a huge expansion stress inside the concrete, which will lead to cracking and even loss of mechanical properties of the concrete.

Method used

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  • Novel foundation pit waterproof curtain additive material alkali-free liquid accelerator and preparation method thereof
  • Novel foundation pit waterproof curtain additive material alkali-free liquid accelerator and preparation method thereof

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Embodiment Construction

[0027] In order to deepen the understanding of the present invention, the present invention will be described in further detail below through examples, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0028] The silica sol used in the present invention is a silica sol modified by a silane coupling agent; the silane coupling agent is methyldodecyldimethoxysilane, and its molecular formula is CH 3 (CH 2 ) 11 Si(CH 3 )(OCH 3 ) 2 The mass fraction containing nano-silica in the silica sol is 32%; the aluminum hydroxide used is an industrial amorphous aluminum hydroxide with an alumina mass content of 60 to 65%; silica sol, silane coupling agent and The mass ratio of water is 1:20:35.

[0029] The formula of the novel foundation pit water-stop curtain additive material non-alkali liquid quick-setting agent in each embodiment of the present invention is as shown in table 1 below:

[0030] Table 1 is the compo...

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Abstract

The invention relates to a novel foundation pit waterproof curtain additive material alkali-free liquid accelerator and a preparation method thereof. The novel foundation pit waterproof curtain additive material alkali-free liquid accelerator comprises the following components in percentage by mass: 20-40% of aluminium hydroxide, 10-15% of silica sol, 3-10% of rosin, 1-5% of triisopropanolamine, 1-5% of diethylamine, 1-5% of phosphoric acid and 35-55% of water. The silica sol is silica sol modified by a silane coupling agent; the silane coupling agent is an alkyl alkoxy silane coupling agent and has a structural formula of YRnSiX3. The novel foundation pit waterproof curtain additive material alkali-free liquid accelerator has a stable solution system, does not contain any sulfate ion, alkali metal ion, chloride ion or any other corrosive substance and is stable in quality, excellent in adaptability, low in doping amount, high in condensation rate and high in strength; even if stored at a normal temperature for six months, the accelerator does not have a layering phenomenon.

Description

technical field [0001] The present invention relates to the technical field of building materials, in particular to the technical field of foundation pit water-stop curtain material, and in particular to a novel base-pit water-stop curtain additive material non-alkali liquid quick-setting agent and its preparation method and application. Background technique [0002] Shotcrete is an important construction technology of concrete engineering. At present, the accelerators used for shotcrete in my country are still mainly high-alkali powder accelerators. Accelerators are admixtures that make cement concrete harden quickly. They are mainly used in In tunnel shotcrete construction and mortar repair construction; this type of powder accelerator will cause great damage to the environment and cause serious physical injury to construction workers. With the further improvement of technology, domestic high alkali, Low-cost new foundation pit water-stop curtain additive material non-alkali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/34C04B103/12
CPCC04B40/0039C04B2103/12C04B22/06C04B24/34C04B24/122C04B24/121C04B22/165C04B14/062
Inventor 周曙东尚学伟陈家冬杨伟文
Owner 江苏地基工程有限公司
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