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Concrete fluidization reinforced waterproof compacting agent based on superfine fly ash micro-bead

An ultra-fine fly ash, waterproof and compact technology, which is applied in the field of building materials, can solve the problems of not being able to reflect fluid concrete and difficult to improve the quality of concrete, and achieve the effects of increasing compactness, significant water reduction effect, and reducing heat of hydration Effect

Inactive Publication Date: 2011-09-14
华新混凝土襄阳有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used fluidizing agents in the market only stop at improving the construction performance of concrete, but it is difficult to achieve a substantial improvement in the quality of concrete, so that it cannot reflect the performance of fluid concrete technology.

Method used

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  • Concrete fluidization reinforced waterproof compacting agent based on superfine fly ash micro-bead
  • Concrete fluidization reinforced waterproof compacting agent based on superfine fly ash micro-bead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, the fluidization of concrete based on superfine fly ash microbeads strengthens the waterproof compacting agent by superfine fly ash microbeads 74.07% (percentage by weight, the same below), polycarboxylate water reducer 1.48%, UEA expansion 22.62% agent, 0.74% sodium methyl siliconate, 0.74% polydimethylsiloxane, 0.34% ethylene glycol. After adding 5% of the amount of gel material in each square matrix concrete, and then stirring for 1-5 minutes, the prepared fluid concrete can be constructed on site. The liquid concrete prepared by the product and C40 matrix concrete has a slump of 23cm, a normal pressure bleeding rate ratio of 0, a pressure bleeding rate ratio of 10%, and a compressive strength of 16MPa for the 1d, 3d, 7d and 28d concrete respectively. 25MPa, 41MPa and 55MPa, the penetration height ratio is 30%, the 48h water absorption ratio is 60%, good freeze-thaw cycle resistance, and has a certain micro-expansion.

Embodiment 2

[0025] Example 2, Concrete Fluidization Enhanced Waterproof Compacting Agent Based on Ultrafine Fly Ash Microbeads 74.07% of ultrafine fly ash microspheres, 1.28% of polycarboxylate water reducer, 22.82% of UEA expansion agent, methyl silicon It is formulated with sodium alkoxide 0.74%, polydimethylsiloxane 0.74%, and ethylene glycol 0.34%. After adding 7% of the amount of gel material in each square matrix concrete, and then stirring for 1-5 minutes, the prepared fluid concrete can be constructed on site. The liquid concrete prepared by the product and C30 matrix concrete has a slump of 22.5cm, a normal pressure bleeding rate ratio of 0, a pressure bleeding rate ratio of 9%, and a compressive strength of 10MPa for 1d, 3d, 7d and 28d concrete respectively. , 19MPa, 35MPa and 50MPa, the penetration height ratio is 29%, the 48h water absorption ratio is 60%, the freeze-thaw cycle resistance is good, and it has a certain micro-expansion.

Embodiment 3

[0026] Example 3, Concrete Fluidization Enhanced Waterproofing Compacting Agent Based on Ultrafine Fly Ash Microbeads 74.07% of Ultrafine Fly Ash Microspheres, 1.08% of Polycarboxylate Water Reducer, 23.02% of UEA Expansion Agent, Methyl Silicon It is formulated with sodium alkoxide 0.74%, polydimethylsiloxane 0.74%, and ethylene glycol 0.34%. After adding 9% of the amount of gel material in each square matrix concrete, and then stirring for 1-5 minutes, the prepared fluid concrete can be constructed on site. The liquid concrete prepared by the product and C50 matrix concrete has a slump of 22cm, a normal pressure bleeding rate ratio of 0, a pressure bleeding rate ratio of 10%, and a compressive strength of 20MPa for 1d, 3d, 7d and 28d of concrete, respectively. 41MPa, 54MPa and 73MPa, the penetration height ratio is 25%, the 48h water absorption ratio is 55%, good freeze-thaw cycle resistance, and has a certain micro-expansion.

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a concrete fluidization reinforced waterproof compacting agent on the basis of ultrafine flay ash micro-balloons. The compacting agent consists of the ultrafine flay ash micro-balloons, polycarboxylic acid water reducing agent, UEA expanding agent, sodium methyl silanolate, dimethyl silicone polymer and ethylene glycol. With the compacting agent, the original concrete can reach the requirement of large liquidity efficiently and has excellent later strength reinforcing effect and water resistance; besides, the compacting agent makes the structure of the original concrete compact so that the requirement on excellent durability for the concrete is achieved. The compacting agent does not rust steel bars inside the concrete, and is widely applied to preparing fluid concrete in a reinforced concrete structure.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete fluidization-enhancing waterproof compacting agent based on ultrafine fly ash microbeads. Background technique [0002] At present, a large number of national infrastructure projects are in full swing. In many reinforced concrete projects, there are components or parts with dense steel bars or tendons. These parts have narrow sections and are difficult for vibrators to reach. One of the best solutions is to use fluid concrete. The preparation of the so-called fluid concrete is to pre-mix the concrete with a slump of 8-12cm, transport it to the construction site, add an appropriate fluidizing agent before pouring, and stir for 1-3min to make the concrete The slump suddenly increases to 24-26cm, and the slump expansion reaches 60-70cm, which can flow like water. Fluid concrete has good constructability, is convenient for transportation and pumpin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B18/08
CPCC04B40/0039C04B2111/27C04B2103/30C04B18/088C04B2103/44C04B28/02Y02W30/91C04B20/008C04B22/008C04B24/02C04B24/2641C04B24/42C04B2103/0006C04B2103/302C04B32/02
Inventor 孙振平陈柯柯蒋正武杨正宏高峰
Owner 华新混凝土襄阳有限公司