CN201835429U

CN201835429U - Water-proof concrete slab

Info

Publication number: CN201835429U
Application number: CN2010205951119U
Authority: CN
Inventors: 张健
Original assignee: Third Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Current assignee: Third Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Priority date: 2010-11-04
Filing date: 2010-11-04
Publication date: 2011-05-18
Anticipated expiration: 2020-11-04

Abstract

The utility model discloses a water-proof concrete slab comprising a water-proof concrete slab body (1) and a water-proof layer (2) which is arranged on the outer surface of the water-proof concrete slab body (1). Through the water-proof layer coated on the surface of the water-proof concrete slab body, water dripped on the layer becomes small water beads and cannot penetrate into the concrete slab body so as to effectively block the water and harmful substances carried by the water from penetrating into the concrete slab body, effectively prohibit steel reinforcing bar rust and concrete corrosion, and improve the structural durability.

Description

The waterproof concrete plate

Technical field

The utility model relates to the concrete construction technical field, more particularly, relates to a kind of waterproof concrete plate.

Background technology

Structure durability is meant and is designing under definite environmental activity and maintenance, the service condition that structural element keeps the ability of its applicability and safety in design life.Concrete structure comprises plain concrete, steel concrete and prestressed reinforced concrete construction, and these three kinds of form of structure are most widely used form of structure in the infrastructure.The safety of concrete structure and endurance issues are concerning the masses' the security of the lives and property and the benefit of investment.

Correct architectural design theory should be to emphasize the design of life-cycle, is exactly to invest to economize most in total life cycle.The bridge design that China is early stage exists the problem of design concept and design cycle aspect.Early stage design is emphasized is that investment in the construction period economizes most, has ignored the design of durability, and existing now a large amount of concrete constructions are removed too early because of structure durability is not enough when being far from reaching design service life.

The infrastructure construction of China is located at and occupies higher proportion in the national economy, infrastructure is worth that to occupy ratio in the total wealth of Chinese society also very high, the large foundation facility involves great expense, expend a large amount of energy and resource, but usually because the structure durability deficiency, cause it will overhaul or dismounting when being far from reaching design service life.

Cause concrete structure durability reason not enough and performance degradation that chloride ion corrosion, graphitic corrosion, corrosion of steel bar, alkali one aggregate reaction, freeze-thaw damage etc. are arranged, and water and aggressivity hazardous substances are the necessary conditions that causes corrosion of steel bar and concrete destruction.Therefore, high-effective water-proof just becomes the important measures that improve concrete structure durability.But, do not have a kind of effective concrete water-proof measure at present.

The utility model content

In view of this, the utility model provides a kind of waterproof concrete plate, reaches the purpose of waterproof to realize concrete slab, makes concrete slab reach the requirement of structure durability.

For achieving the above object, the utility model provides following technical scheme:

A kind of waterproof concrete plate comprises the concrete slab body, also comprises the waterproofing course that is arranged on this this external surface of concrete slab.

Preferably, in above-mentioned waterproof concrete plate, described waterproofing course is a silane paste impregnating agent layer.

Preferably, in above-mentioned waterproof concrete plate, described silane paste impregnating agent layer is two-layer, is respectively the first silane paste impregnating agent layer that is coated in described this external surface of concrete slab, and the second silane paste impregnating agent layer that is coated in the described first silane paste impregnating agent layer external surface.

From above-mentioned technical scheme as can be seen, the utility model is by the surface-coated waterproofing course at the concrete slab body, make the water that drops in above it become droplet, can't penetrate into the concrete slab body interior, thereby effectively the entrained hazardous substances of resistance shelves moisture and moisture is infiltrated the concrete slab body interior, effectively suppress the generation of corrosion of steel bar and concrete erosion, improved its structure durability.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The structural representation of the waterproof concrete plate that Fig. 1 provides for the utility model embodiment;

The structural representation of the waterproof concrete plate that Fig. 2 provides for another embodiment of the utility model;

The construction flow chart of the waterproof concrete plate that Fig. 3 provides for the utility model embodiment.

The specific embodiment

The utility model discloses a kind of waterproof concrete plate, reach the purpose of waterproof, make concrete slab reach the requirement of structure durability to realize concrete slab.

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

See also Fig. 1 and Fig. 2, the structural representation of the waterproof concrete plate that the structural representation of the waterproof concrete plate that Fig. 1 provides for the utility model embodiment, Fig. 2 provide for another embodiment of the utility model.

The waterproof concrete plate that the utility model provides comprises concrete slab body 1, and the waterproofing course 2 that is arranged on this concrete slab body 1 external surface.Waterproofing course 2 is coated in the external surface of concrete slab body 1 for the material with hydrophobicity, therefore can make the water that drops in above it become droplet, can't penetrate into concrete slab body 1 inside, thereby effectively the entrained hazardous substances of resistance shelves moisture and moisture is infiltrated concrete slab body 1 inside, effectively suppress the generation of corrosion of steel bar and concrete erosion, improved its structure durability.

Waterproofing course 2 can be silane paste impregnating agent layer, and silane paste impregnating agent layer 2 can be sprayed at the surface of clean concrete slab body 1 with it when construction, can slowly liquefy and be penetrated into several millimeters depths of inside concrete.Under water and concrete alkali catalytic action, hydrolysis at first takes place and generates the silicon alkyl in silane, condensation reaction further takes place between the alkyl in silicon alkyl and concrete surface and capillary channel then generate netted organic siliconresin, by stable silica key, with the organosilicon molecule firm attached in concrete surface and the capillary channel.N-octyl stone hydrophobic group in the long chain alkyl silane molecule, they just are arranged in concrete surface and the capillary channel as countless Umbrellas, and original hydrophilic concrete surface and capillary hole wall become hydrophobic surface.The netted siloxanes molecular film of this repellency has very low surface tension, can be evenly distributed on the micro-pore wall of silicate base material of porous, rather than seal its capillary channel, water is 100 °～130 ° at the contact angle of capillary wall, make the water that drops in above it become droplet, can't penetrate into base material inside, infiltrate inside concrete, effectively suppress corrosion of steel bar and concrete erosion and take place thereby effectively hinder the entrained hazardous substances of shelves moisture and moisture.

As shown in Figure 2, silane paste impregnating agent layer can be for two-layer, be respectively the first silane paste impregnating agent layer 21 that is coated in described concrete slab body 1 external surface, and the second silane paste impregnating agent layer 22 that is coated in the described first silane paste impregnating agent layer, 21 external surface.Preferably, the spraying with the second silane paste impregnating agent layer 22 should be no less than 6 hours at interval with 21 spraying of the first silane paste impregnating agent layer.

Silane paste impregnating agent layer has the following advantages:

1. superior water resistance can make the water absorption rate of concrete structure descend more than 90%;

2. the hydrophobicity of organic silicon coat makes aqueous water be difficult to stop on domatic and facade, the hydrone of body of wall inside is easy to outside dissipation, make the volume body of wall of filming down keep the wet balance of doing of nature, moisture can't shed and cause bubbling or top layer decortication as totally-enclosed filming and can not cause;

3. permeance property is strong, lotion can rest on concrete structural surface for a long time, has improved the length of penetration of silane greatly, porous 3～4mm under the concrete surface, can effectively handle crack, can not lose the integral waterproofing ability because of the body structure surface wearing and tearing less than 0.2mm;

4. construction aspect can adopt several different methods constructions such as spraying, brushing, roller coating flexibly;

5. do not change the original outward appearance of works, be fit to the works outward appearance is had the engineering of specific demand;

6. good endurance, the silane paste impregnating agent protective agent life-span reached more than 30 years;

7. can be used with common coating, anticorrosion ability and coating effect are better;

8. compare with epoxy-coated reinforcement, 3 kinds of anticorrosion addition thereto of reinforcing bar corrosion inhibitor and cathodic protection, the silane paste protection is more reasonable economically, the cost performance height.

See also Fig. 3, the construction flow chart of the waterproof concrete plate that Fig. 3 provides for the utility model embodiment.

The construction of the waterproof concrete plate that the utility model embodiment provides mainly comprises following processing step;

101, main material is prepared;

Main material comprises silane paste impregnating agent, sand paper, low-pressure spray gun.Material should be stored in covering, and no sunlight straight shot places does not contact moist floor or ground, material should be stored in air-conditioned canopy or the container.Storage areas should be shown with suitable warning board, and satisfies all mandatory requirements to this veriety and the storage of danger classes material.

102, construction equipment;

Large-area construction is used airless spraying equipment, and the efficiency of construction height can reduce raw-material loss; The small size construction can be used brush or scraper; As raining suddenly, stop construction immediately, and carefully build construction member during construction, prevent to cause the silane active component before curing, to run off, influence construction effect because of drenching with rain.

103, surfacing;

3.1 for guaranteeing silane impregnation process effect, should repair concrete slab main body structure defective before the construction earlier in the back construction of 4 week of concrete component moulding, with wire brush, compressed air and fresh water flushing, the floating ash in surface, sewage, greasy dirt and other pollutants are removed totally, and kept dry tack free.

3.2 can not adopt the curing membrane maintenance on the surface that needs silane coating, do not having under the situation of other explanations, adopt the not water curing of chloride;

3.3 the cast-in-place member in being exposed to briny environment, seawater immerse preceding and in the demoulding 24 hours in the coating of constructing.Prefabricated units are finished the construction coating before lifting.

104, silane dipping spraying;

4.1 for concrete slab body 1 vertical plane, should adopt continuous spraying technology, upwards carry out from lowest part, the dipping that reaches capacity, treated zone should have " light face " effect in 5 seconds at least; For concrete slab body 1 horizontal plane or near the surface of level, should adopt the continuous spraying technology dipping that reaches capacity, make surperficial saturated dipping, treated zone should have " light face " effect in 5 seconds at least; To the spraying of concrete slab body 1 bottom surface, should adopt continuous spraying technology spraying, treated zone should have " light face " effect in 5 seconds at least.

4.2 all zones that need spray should spray two-layer silane, second layer spraying should be no less than 6 hours at interval with the first floor spraying.

4.3 use amount: for lotion silane waterproof agent, consumption is the highest can construct by 300g/m, and concrete consumption is determined according to designing requirement and concrete absorptive capacity; High performance concrete is because the compactness height, and it is slow to absorb liquid velocity, and the consumption of once constructing should not surpass 200g/m, if excessive spraying, can cause the lotion spraying application after, lotion can liquefy smoothly and but be difficult to be absorbed rapidly, causes the material sagging serious, the loss increasing.

105, inspect for acceptance;

The holiday part should spray again, and as adopting core boring sampling, back spraying silane should be repaired in the sampling rear.

Each embodiment adopts the mode of going forward one by one to describe in this manual, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. a waterproof concrete plate comprises concrete slab body (1), it is characterized in that, also comprises the waterproofing course (2) that is arranged on this concrete slab body (1) external surface.

2. waterproof concrete plate as claimed in claim 1 is characterized in that, described waterproofing course (2) is a silane paste impregnating agent layer.

3. waterproof concrete plate as claimed in claim 2, it is characterized in that, described silane paste impregnating agent layer is two-layer, be respectively the first silane paste impregnating agent layer (21) that is coated in described concrete slab body (1) external surface, and the second silane paste impregnating agent layer (22) that is coated in described first silane paste impregnating agent layer (21) external surface.