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A kind of microcrystalline waterproofing agent for concrete and its application

A waterproofing agent and concrete technology, which is applied in the field of concrete additives, can solve the problems of poor bonding, cracks on the plugging surface, and the overall shedding of the waterproof layer wall, and achieve the effects of good dispersion and retention, enhanced defoaming, and enhanced waterproofing ability

Active Publication Date: 2022-05-27
南京派尼尔科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Moreover, the waterproofing agent and the cement material are both metal oxides or non-metal oxides, which have the same chargeability, and the degree of bonding is relatively poor during use. It is easy to delaminate and fall off when the base surface is wet and the base surface has a high osmotic pressure.
Especially when the waterproofing agent is added to the shotcrete and constructed on the vertical wall, when the water seepage point is blocked by the shotcrete, the plugging material at the water seepage point will bear a certain water pressure, and the blocked water will have a strong impact on the surrounding cracks. The pressure generated by the rock mass makes the volume of the rock mass around the cracks compressed, the cracks increase, the plugging surface is prone to pull cracks, and even the whole wall between the waterproof layer and the original wall falls off

Method used

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  • A kind of microcrystalline waterproofing agent for concrete and its application
  • A kind of microcrystalline waterproofing agent for concrete and its application
  • A kind of microcrystalline waterproofing agent for concrete and its application

Examples

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Effect test

Embodiment 1

[0038] A kind of application of microcrystalline waterproofing agent for concrete as concrete additive, and its preparation method comprises the steps:

[0039] Step 1. Modification of silica particles: drying the silica particles in a muffle furnace, then uniformly dispersing in the added absolute ethanol, and then adding γ-mercapto which accounts for 27% of the total mass of the silica particles propyltriethoxysilane, heated to 55°C under low pressure, stirred for 3h, and finally the mixture was filtered, dried and ground. The microcrystalline particle size of the modified silica powder is larger than 400 meshes, and the specific surface is 210-250 cm 2 / g.

[0040] Step 2. Weigh 2kg of defoamer, 4kg of modified silica powder and 1kg of water reducing agent according to the formula, then mix the defoaming agent, modified silica powder waterproofing agent and water reducing agent to 60°C and heat up to 60°C. Stir for 30min to obtain component A; then mix 600kg of concrete (...

Embodiment 2

[0045] A kind of application of microcrystalline waterproofing agent for concrete as additive, the preparation method of which comprises the following steps:

[0046] Step 1. Modification of silica particles: drying the silica particles in a muffle furnace, then uniformly dispersing in the added absolute ethanol, and then adding γ-mercapto which accounts for 15% of the total mass of the silica particles propyltriethoxysilane, heated to 45°C under low pressure, stirred for 5h, and finally the mixture was filtered, dried and ground. The microcrystalline particle size of the modified silica powder is larger than 400 meshes, and the specific surface is 210-250 cm 2 / g.

[0047] Step 2. Weigh 1kg of defoamer, 2kg of modified silica powder and 0.5kg of water reducing agent according to the formula, then mix the defoaming agent, modified silica powder waterproofing agent and water reducing agent to 60°C, And stir for 30min to obtain component A; then mix 1000kg of concrete (the mas...

Embodiment 3

[0053] A kind of microcrystalline waterproofing agent for concrete is used as the application that should be a bulk concrete additive, and its preparation method comprises the following steps:

[0054] Step 1. Modification of silica particles: drying the silica particles in a muffle furnace, then uniformly dispersing in the added absolute ethanol, and then adding γ-mercapto which accounts for 40% of the total mass of the silica particles propyltriethoxysilane, heated to 60°C under low pressure, stirred for 2h, and finally the mixture was filtered, dried and ground. The microcrystalline particle size of the modified silica powder is larger than 400 meshes, and the specific surface is 210-250 cm 2 / g.

[0055] Step 2. Weigh 5kg of defoamer, 4kg of modified silica powder and 1.5kg of water reducing agent according to the formula, then mix the defoamer, modified silica powder waterproofing agent and water reducing agent to 60°C, And stir 30min, obtain component A; Then mix 500kg...

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Abstract

The invention discloses a microcrystalline waterproofing agent for concrete and an application thereof, belonging to the field of concrete additives. In terms of parts by mass, it includes the following components: 1-5 parts of defoaming agent; 2-4 parts of modified silicon dioxide powder; 7-10 parts of waterproofing agent; 0.5-1.5 parts of water reducing agent. In the present invention, by adding a certain amount of defoamer to the microcrystalline waterproofing agent, microcapillary pores with relatively short length and small diameter are formed in the concrete, and at the same time, the surface of the modified silica powder particles has more hydrophobic Sexual groups further strengthen the defoaming and foam stabilizing effects, and reduce the volume of capillary pores that will be formed during the gas discharge process. The tension of the liquid on the surface of these micro pores can effectively prevent the liquid from entering the micro pores, thereby greatly enhancing the waterproof ability of concrete.

Description

technical field [0001] The invention belongs to the field of concrete additives, in particular to a microcrystalline waterproofing agent for concrete and its application. Background technique [0002] Microcrystalline water repellent is an anti-cracking and impermeable admixture successfully developed in recent years. Its main chemical component is amorphous aluminum silicate. After mixing with cement, the amorphous aluminum silicate component and the active calcium hydroxide produced by cement hydration combine to form calcium silicate gel. The gel has the function of filling and cutting capillary pores, and filling the leakage paths caused by micro pores and capillary pores. It is suitable for waterproof and moisture-proof of the ground, inner and outer walls, basements and pools of various buildings. [0003] However, the existing waterproofing agent generally achieves the effect of plugging the leakage through volume expansion by the heat of hydration of the material, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B24/38C04B28/00C08F251/02C08F220/06C08G77/46E04B1/66E04G21/02E04G21/24C04B103/65C04B103/30C04B103/22C04B111/27
CPCC04B40/0039C04B24/42C04B24/425C04B24/383C04B28/00C08F251/02C08G77/46E04B1/66E04G21/02E04G21/246C04B2103/65C04B2103/302C04B2103/22C04B2103/46C04B2111/27C04B2111/00146C04B2103/50C04B22/06C04B24/003C04B2103/0068C04B14/068C08F220/06Y02W30/91
Inventor 朱瑾叶德平
Owner 南京派尼尔科技实业有限公司
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