High-property water permeation concrete cementing agent and application thereof

A technology of permeable concrete and cement, which is applied in the field of permeable concrete additives, can solve problems such as poor alkali resistance, high price, and inconspicuous reinforcement effect, and achieve the goal of improving compression resistance, best reinforcement effect and durability, and prolonging construction operation time Effect

Inactive Publication Date: 2017-05-31
中建西部建设西南有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, although the organic cementing agent has a better reinforcing effect, its price is higher and the durability of permeable concrete is caused by poor alkali resistance; although the inorganic cementing agent is lower in price and has better durability of permeable concrete, but its reinforcing effect not obvious

Method used

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  • High-property water permeation concrete cementing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-performance permeable concrete binder, the raw materials of which are calculated by mass percentage: 68% of active silica powder, 18% of interface modifier, 10% of water reducer, 2% of coagulation regulator, and 2% of thickener.

[0023] In this example, SiO in active silica powder 2 The content is 92%, the 28d activity index is 105%, and the specific surface area is 20000m 2 / kg; the interfacial modifier consists of 50wt% powdered vinyl acetate and ethylene copolymer (minimum film-forming temperature 2°C) and 50wt% powdery vinyl acetate-ethylene-vinyl tert-carbonate copolymer (minimum film-forming temperature 2°C) ℃) compounded; the water reducer is an early-strength powder polycarboxylate high-efficiency water reducer with a water reducing rate of 28%; the coagulation regulator is 70wt% powdered sodium pyrophosphate (industrial grade) and 30wt% sodium phosphate (industrial grade) composite; the thickener is carboxymethyl cellulose (industrial grade).

Embodiment 2

[0025] A high-performance permeable concrete binder, the raw materials of which are calculated by mass percentage: 68% of active silica powder, 22% of interface modifier, 7% of water reducer, 3% of coagulation regulator, and 0% of thickener.

[0026] In this example, SiO in active silica powder 2 The content is 94wt%, the 28d activity index is 102%, and the specific surface area is 18000m 2 / kg; the interfacial modifier is compounded by 60wt% powdery acrylate-styrene copolymer (minimum film-forming temperature 5°C) and 40wt% powdery acrylate copolymer (minimum film-forming temperature 5°C); The agent is an early-strength powder polycarboxylate high-efficiency superplasticizer with a water reducing rate of 30%; the coagulation regulator is a compound of 20wt% sodium lignosulfonate and 80wt% sodium gluconate.

Embodiment 3

[0028] A high-performance permeable concrete binder, whose raw materials are calculated by mass percentage: 72% of active silica powder, 18% of interface modifier, 7% of water reducer, 2% of coagulation regulator, and 1% of thickener.

[0029] In this example, SiO in active silica powder 2 The content is 93wt%, the 28d activity index is 105%, and the specific surface area is 20000m 2 / kg; Interface modifier is 70wt% powdery styrene-butadiene copolymer (2 ℃ of minimum film-forming temperature) and 30wt% powdery vinyl acetate-ethylene copolymer (2 ℃ of minimum film-forming temperature); The water agent is a retarder powdery aliphatic high-efficiency water reducer, and the water reducing rate is 24%; the coagulation regulator is sodium gluconate (industrial grade); grade) and 50 wt% hydroxyethyl cellulose.

[0030]The preparation method of a kind of high-performance permeable concrete cement agent taking embodiment 1 as example, put 68kg active silicon dioxide powder into YLT-1...

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Abstract

The invention discloses a high-property water permeation concrete cementing agent. The high-property water permeation concrete cementing agent is prepared from the following raw materials in percentage by mass: 68 to 72% of activated silicon dioxide powder, 18 to 22% of interface modifier, 7 to 10% of water reducing agent, 2 to 4% of thickening time control agent, and 0 to 2% of thickener. The high-property water permeation concrete cementing agent has the advantages that by blending the cementing agent into water permeation concrete, the construction operation time can be obviously prolonged; the compressive and break strengths are improved, and the water permeation coefficient is increased.

Description

technical field [0001] The invention belongs to the field of permeable concrete additives, and in particular relates to a high-performance permeable concrete binder and its application. Background technique [0002] The hardened ground design of traditional urban roads and squares mainly focuses on its durability and other technical performance indicators and visual aesthetic requirements, so a large number of non-permeable pavements are used. However, this pavement method has obvious ecological and environmental defects, such as : (1) The road surface is impermeable, and the replenishment of groundwater by rainwater is blocked, which makes it difficult for the groundwater level in the city to rise; (2) Surface runoff is easy to occur during the rainy season, and a large amount of urban pollutants will be directly discharged to the local area through pipelines together with rainwater (3) The hardened road surface absorbs, stores and reflects the heat of the sun, which increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B14/06C04B24/2623C04B24/2688C04B2103/302C04B22/16C04B24/383C04B24/2676C04B24/2641C04B24/18C04B24/06C04B2103/44
Inventor 甘戈金陈景兰聪卢佳林祝云王晶晶
Owner 中建西部建设西南有限公司
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