Polyurea Grouting Liquid

New generation modified polyurea grouting liquid, adopts strict environmental standards, using polyurea emulsion as the base material, a high-performance single-component leak-stop grouting agent processed scientifically. High solid content, micro-expansion, hydrophilic reaction makes the product's leak-stop performance superior to ordinary leak-stop products, while also having high adhesion tensile extensibility, can cover cracks, effectively solve seepage leakage (visible water) and re-leakage after grouting in deformation joints, expansion joints, junctions, etc., concrete structure cracks, an ideal new type of leak-stop grouting liquid.

Product Features

・Fully cures in water, good adhesion force to concrete on moist surfaces;

・Significantly improved fluidity, quick leak-stop water stopping;

・Curing is not sensitive to temperature, cures at high and low temperatures, does not shrink later;

・Has certain strength and elasticity, can reinforce and adapt;

・Single-component characteristics make operation simple and convenient, no ratio required, reduces labor costs;

・Resistant to water immersion, acid and alkali, high and low temperatures;

・Environmentally friendly non-toxic, harmless to humans.

Construction Process

1. Clean and wash cracks, clean surrounding debris and dust of cracks and joints, ensure gaps are clean free of foreign matter and dust;

2. Pre-bury grouting needles, spacing 10~15cm one, cross places of cracks add a grouting needle at 45° angle;

3. Water stopping reinforcement grouting, after the next grouting needle starts leaking, continue pressing for 2~3 seconds.

Note: Ensure cracks are fully grouted, areas where grouting is insufficient need supplementary nail and加注。

Scope of Application

Applicable to building construction, civil engineering, underground engineering, metro, tunnel, pipe gallery, etc., all concrete structure crack leakage grouting leak stopping.

Technical Parameters

Performance characteristics of polyurea grouting liquid in grouting leak stopping

1. Normal temperature curing time to react fully with water is about 25 minutes, bond strength on water-bearing surface or damp surface is greater than 1 Mpa, combined with material itself viscidity, hydrophilic insoluble in water and deep hole pressure injection, general crack seepage leakage can be directly pressure injected to stop leaks.

Can also add catalyst to speed up material curing rate, but may lose bond strength, generally not recommended. Encountering flowing water, sudden water can adopt drain and seal then grouting method to govern; 2. Adding no organic solvent nearly 100% solid content, guaranteeing no shrinkage later, but normal temperature material relatively thick, viscosity large, fine crack penetrability damaged, can reduce viscosity and use high power grouting machine to resolve by proper warming material;

3. Has about 0.4% extremely low water absorption rate water immersion resistance, can resist acid and alkali:

4. Environmentally friendly non-toxic, single component grouting operation simple quality stable;

5. Has good elasticity, break elongation rate can reach 400%, can very well adapt to crack continuous dynamic deformation;

6. Has certain tensile strength, after filling cracks completely, can improve tensile strength of defective concrete.

This single component polyurea grouting material, after curing becomes a elastic body with compact internal structure no bubbles, has strong bonding with concrete substrate strength, can stop water thoroughly once, can resist building displacement advantages.

Scope of Application

Applicable to such as underground engineering, metro, tunnel, culvert, underground integrated pipe gallery etc. all concrete structure leakage grouting leak stopping, especially shield segments, post-pour bands, deformation joints, expansion joints etc. vibration and deformation larger structure stop leakage grouting.

Product Features

1. Solve big water easy stop, small water hard cure problem: can fully cure in water, moisture surface or wateradhesion force with concrete is good; internal structure dense, waterproof property good; curing not sensitive to temperature, high and low temp both cureable.

2. Solve stopped leakage still not stop re-leak problem: has certain strength and elasticity, can reinforce yetadapt; late stage not shrink.

3. Good durability: water immersion resistant, acid and alkali resistant, high and low temperature resistant; environmentally friendly non-toxic, harmless to humans.

Feature Advantages

1. Traditional polyurethane grouting material after curing is brittle material with internal bubbles, cannot resist building thermal expansion contraction and vibration generated displacement, and large amount of bubbles easily lead to building re-leakage situation appearing, whereas this single component polyurea grouting material after curing becomes a compact type elastic body, can effectively make up for polyurethane grouting material shortcomings, improve leak stopping effect;

2. This polyurea grouting material is single component product, during construction process no need add other components, use convenient fast, additionally, single component product also reduces mix ratio inaccurate problem improves construction efficiency and quality;

3. This polyurea grouting material solid content high, can reduce product usage amount, lower cost; meanwhile, this product friendly to environment, will not pollute environment;

Usage Method

When using, first take polyurea grouting material dosage 3~5wt.% water mixed stirring with grouting material, to accelerate material curing time, then used for grouting leak stopping, from mixing stirto grouting finish time ≤30min.

For building small cracks, can pour polyurea grouting material into high pressure grouting machine, inject into cracks through grouting needles, wait material solidify then plays water stop effect; for building between deformation joints, expansion joints, settlement joints etc. this gap larger, can directly pour material into gap inside, wait material cure then plays water stop effect.

High solid content, no shrinkage, after curing generates high strength, high elongation rate elastic material, strong adhesion with substrate, reaches leak stopping, sealing function. Effectively solve deformation joint, expansion joint, junction joint etc. structural crack appearance seepage leakage problems,

Product Features

·Single component construction, operation simple.

·Slurry does not disperse in water, does not emulsify, no reaction foaming with water, no shrinkage after curing.

·Curing not sensitive to temperature, high and low temp both cureable.

·On moist surface or water bonding force with concrete is strong, internal structure dense, waterproof property good.

·High elongation rate, high resilience, adapt to thermal expansion contraction and external vibration, avoid re-leak.

·Does not contain pollutants dissolved in water, eco-environmental.

·Resist acid, alkali, salt etc. chemical corrosion, hydrolysis resistant.

Scope of Application

・Metro, railway, highway, municipal, building, tunnel, culvert, water conservancy, underground integrated pipe gallery etc. all concrete structure leakage grouting leak stopping.

·Shield segments, post-pour bands, deformation joints etc. vibration and deformation larger structures grouting leak stopping.

Usage Instructions

・Before using product open cover please shake well, after pouring out dosage please promptly close bucket lid, prevent moisture entering, open cover soon use up.

・To ensure leak stopping effect, recommend along cracks drill angled holes and straight holes (on-seam holes) combination grouting and note hole spacing and angle, blow out dust inside holes. If no grooving, during grouting ensure whole crack all pours out slurry. If grooving, first seal and drain, during grouting must ensure construction seam, deformation joint drainage pipeline all pours out slurry, avoid grouting insufficient leading to later re-leak.

·This product curing speed slightly slow, add catalyst accelerate curing, admixture amount 1~5%, catalyst admixture amount suggest formal use before first trial mix, confirm admixture amount.

·Discover grouting not full or insufficient, should supplement hole grouting, until base surface all dry, no leakage.

Precautions

・During construction, base material temperature must be greater than dew point temperature 3℃.

·Before product use, should conduct thorough stirring.

·Enclosed space construction, must maintain good ventilation.

·Using this product, must wear work clothes, wear goggles and gloves etc. protective gear.

Product Features

·Single component construction, operation simple.

·Slurry does not disperse in water, does not emulsify, no reaction foaming with water, no shrinkage after curing.

·Curing not sensitive to temperature, high and low temp both cureable.

·On moist surface or water bonding force with concrete is strong, internal structure dense, waterproof property good.

·High elongation rate, high resilience, adapt to thermal expansion contraction and external vibration, avoid re-leak.

·Does not contain pollutants dissolved in water, eco-environmental.

·Resist acid, alkali, salt etc. chemical corrosion, hydrolysis resistant.

Polyurea grouting liquid comprehensive performance excellent, it has environmentally friendly non-toxic, dense durable, bubble free no shrink, damp adhesive, elastic adaptable, and possesses higher strength, injection placement can greatly reduce re-leakage performance failures in grouting sealing and greatly extend leak-stopping life.. Features 1. Normal temperature fully react with water curing time about 25 minutes, water base surface or damp base surface bond strength greater than 1 Mpa, cooperate material own viscidity, hydrophilic insoluble in water and deep hole pressure injection, general crack seepage leakage can be directly pressure injected to stop leaks.

Polyurea Grouting Liquid Application Technology

Polyurea grouting liquid takes polyurea emulsion as main material, after scientific processing become high performance polymer single component leak stop and seam filling new type protective material. Its high solid content, no shrink and hydrophilic reaction and wear resistance, aging resistance, chemical corrosion resistance, excellent waterproof performance make this product's leak stop and seam filling effect compared to ordinary leak stop, seam filling materials more excellent and durable. It not only can bond concrete materials, but also can bond metal materials, can also glue concrete and metal two different materials friendly together together, effectively solved concrete leakage, deformation joint leakage, expansion joint leakage, junction joint leakage etc 're-leak' difficulties.

Polyurea grouting liquid belongs to friendly type material, non-toxic, no VOC, high weather resistance, high toughness, high adhesion, high anti-seepage, dry and moist base surface both can construct. In wear scouring, wear carbon resistance, anti-freeze, chemical corrosion resistance aspect have high adaptability, while high solid content gives it ability to form film quickly on concrete or metal surface, in ambient temperature -40℃-120℃ can maintain good effect, its single component convenient construction, whether grouting, or grouting or brushing, scraping all can. Ordinary single component grouting machine or high pressure grouting machine in implementation concrete leak stop, seam filling, concrete and metal connection craft, polyurea grouting liquid can completely胜任; moreover after molding has ultra-high tensile strength and elongation. This rare which can both reinforce and adapt change high elastic material for underground engineering, metro, tunnel, culvert, underground integrated pipe gallery etc concrete structure leakage grouting, especially shield segments, post-pour bands, deformation joints, expansion joints etc have vibration or deformation larger structure grouting leak stopping particularly effective, and no shrinkage, put an end to 're-leak' occurrence. Polyurea grouting liquid solid content generally >90%, tensile strength >15MPa, break elongation rate reaches 450%, with concrete adhesion 2.8-3MPa, with steel adhesion reaches 8MPa even higher, low temp resistance -45℃, instantaneous high temp reaching 120℃ right, therefore in temperature change amplitude relatively large environment, and has vibration and change area use polyurea grouting liquid particularly effective, can long time satisfy use requirement is road expansion joints and concrete leakage water stop excellent product, also concrete ordinary PU grouting liquid and road bridge asphalt mortar seam filling material substitute material.

Polyurea grouting liquid main use is concrete water stop grouting and concrete structure 'three seams' grouting seam filling anti-seepage. Concrete traditional anti-seepage water stop mainly uses PU, epoxy, acrylate, water glass etc leak stop materials; but often appear 're-leak' phenomenon. 'Re-leak' reason is many side factors, main reason these material shrinkage and water resistance poor, especially have vibration and structure change larger parts, synchronous change adaptability bad, cause grouting liquid short time fall off, water stop failure, generate 're-leak'. Polyurea grouting liquid high elastic, high elongation and good adhesion force, not only no shrinkage and synchronous concrete structure change, still adapt concrete structure local vibration. Polyurea grouting liquid grouting afterwards internal structure dense, water impervious property excellent, resist acid and alkalihigh and low temperature resistance, thoroughly solve concrete water seepage 're-leak' difficult complications. Single liquid polyurea grouting liquid grouting craft roughly as follows:

1. Clean concrete crack nearby and gap internal impurities and floating dust (no crack does not need), ensure gap internal no foreign matter and floating dust, cleaning method can wind blow or water wash all can.

2. Use hand gun cobalt (wind driven or electric driven all can) supporting 13 m spiral drill for drilling punching. Depth according to concrete thickness and grouting needle length decide, common grouting needle lengths have 10 cm, 15 cm etc, needle spacing according to experience can 10-15 cm drilling one, and along crack cross place 45° angle proceed. All holes must use compressed air blow clean, no any debris and floating dust.

3. Insert grouting needle into hole deep, use T-slot wrench tighten grouting needle, tightness degree according to experience, too loose will 'slurry leak' cause grouting incomplete, too tight will 'needle break' cause waste. Skilled master screwing grouting needle will naturally 'not tight not loose' 'just right' 'one needle position', can say leak stop grouting burrow needle is grouting effect critical step.

4. Grouting water stop. Pour single component polyurea grouting liquid stirred uniform after pour into grouting machine hopper, accurate docking hole eye and 'butterhead', start switch carry out grouting, control pressure (handheld small grouting machine generally pressure is 0.5MPa-5MPa). When concrete surface appear 'leaking slurry' then continue grouting 5S (guarantee grouting completeness) after stop grouting. Observe grouting incomplete area should need supplement needle加注, until concrete dry no leakage till end. Author reminds here, grouting needle should remove next day,不得 'grout remove immediately'.

With construction industry rapid development, polyurea grouting liquid in 'three seams (expansion joints, settlement joints, anti-seismic joints)' and some 'post-pour bands' anti-seepage, leak stop, water stop field application also get rapid growth, traditional asphalt oil sound and mortar seam filler gradually eliminated. Whether building concrete or road tunnel bridge, even sewage pool, underground pipe gallery etc, adopting polyurea grouting liquid seam filling can achieve long-term use effect, typical construction case, such as bridge expansion joint polyurea grouting liquid seam filling application. Traditional bridge expansion joints mostly with rubber water strip or asphalt mortar seam filling water stop anti-seepage, actual use process easily damage and need frequent clean gap groove. With sun rain exposure, vibration fatigue etc factor influence, cause water stop belt aging失效, rain cement slurry gradually penetrate bridge platform, cause concrete steel bar rust, bridge platform crack etc harm, directly to bridge safety use constitute threat. Therefore, choose one durability seam filling anti-seepage material become bridge expansion joint water stop anti-seepage, safe operation key, after bridge construction technology personnel continued exploration and practice, confirm polyurea grouting liquid is effective seam filling material. Polyurea grouting liquid belongs to single component material, construction simple convenient, can glue concrete structure, steel structure tightly connect together. After molding form has strong adhesion elastic body, no shrinkage, own structure dense, anti-seepage water resistant, very adapt bridge structure vibration and expansion contraction deformation; and no cracking, aging resistant, high solid content no VOC, effectively protect bridge expansion joint device reduce expansion joint groove garbage clean work, solved bridge expansion joint seepage water leakage difficulty, extend bridge service life. Bridge expansion joint injection polyurea grouting liquid specific craft as follows:

1. Expansion joint cleaning. Use broom and compressed air sweep blow clean expansion joint concave inside garbage, soil, sand stones and all debris, cleaning when retain original rubber strip, condition allow can use high pressure water flush, keep expansion joint internal clean no foreign matter.

2. Polish expansion joint steel profile. Use electric or wind driven polisher polish expansion sides steel profile (use grinding wheel disc), remove rust etc contaminants, reveal steel profile natural luster, and use compressed air blow clean floating dust and impurities, suggest use vacuum cleaner to suck expand joint concave residue clean clean, then use solvent wipe polished steel profile.

3. Press fill lining strip. Take prepared foam lining strip card into expansion joint, keep installed lining strip with steel profile contact tight, prevent polyurea grouting liquid flow into rubber water stop belt top, lining strip to flat no wrinkle, tight no gap.

4. Grouting fill seam. Use manual grouting apparatus slowly pour polyurea grouting liquid into expansion joint, grouting nozzle tight against lining strip, polyurea grouting liquid automatically flows level; or directly use with long duckbill ladle pour polyurea grouting liquid slowly tight against lining strip face pour, automatically flows level. Polyurea grouting liquid flows level after thickness guarantee in 10 mm right, grouting liquid upper plane slightly below steel profile plane 2mm right. Pouring when note have gluing leak or missing corner, have obvious depression, find problem timely supplement fill.

5. Curing and maintenance. Expansion joint polyurea grouting liquid pouring complete, 48 hours inner forbid contact other pollutants and water, do good protection measures, natural curing, drying, solidifying. Touch polyurea grouting liquid molded product surface, not sticky not tacky then can open use. Curing period if discover have bubbles, bulge and missing glue defect phenomena, should timely carry out repair treatment, treated expansion joint curing time should extend.

Polyurea grouting liquid successful application in bridge expansion joint anti-seepage water stop, for protecting environment, save economy, save resources, improve road management maintenance level has positive significance, for bridge operation safety and extend bridge service life more have important social significance.

Polyurea grouting liquid not only widely applied to various buildings, road bridge, tunnel, underground pipe gallery, sewage pool, dam and underground space etc project reinforcement, anti-seepage, leak stop water stop, in industry field also gradually show unique application advantage. Such as storage tank and pipeline crack, corrosion part repair and anti-corrosion, prevent medium leakage, guarantee industrial production safety. Buried tap water pipe and gas pipe in soil receive moisture, acid base substance and microbial erosion, use polyurea grouting liquid can block above substance invasion, extend pipe service life. Some chemical, petroleum, pharmaceutical etc workshop or warehouse floor use polyurea grouting liquid protection after can prevent floor crack, moreover wear-resistant, corrosion-resistant, thereby杜绝 hazardous waste leakage causing soil pollution. Polyurea grouting liquid can long term use outdoors no aging, no fading, this give us anti-corrosion outdoor beautification coating engineering provide more one kind choice. Polyurea grouting liquid own multiple excellent qualities, for its application expand space, author believes deeper wider application field will be discovered, and confer high economic and social value.

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