WHOLESUN 3000PSI Electric Pressure Washer 2.4GPM Power Washer 1600W High Pressure Cleaner Machine with 4 Nozzles Foam Cannon,Best for Cleaning Homes, Cars, Driveways, Patios (Blue)

 WHOLESUN 3000PSI Electric Pressure Washer 2.4GPM Power Washer 1600W High Pressure Cleaner Machine with 4 Nozzles Foam Cannon,Best for Cleaning Homes, Cars, Driveways, Patios (Blue)

 About this item

•     HIGH PRESSURE FOAMER CANNON: As a high pressure foamer, the polymer corrosion-resistant detergent bottle can loose tough stuff or remove deep stains.
•     HIGH PRESSURE CLEANER: Powerful 1600-Watt motor generates up to 3000 PSI/2.4 GPM.Perfect for siding, decks, cement, pavement, pools, outdoor furniture, cars, trucks, RVs, ATVs and more.
•     LEAKPROOF CONNECTIONS: Professional metal garden hose connector and 22mm metal water outlet. Comes with a 20ft high-pressure hose (metal connection) to avoid annoying water leakage.
•     TOTAL STOP SYSTEM: Power Pressure Washer Features Safety Automatic Total Stop System (TSS), which automatically shuts off the pump when trigger is not engaged to save energy and prolong pump life. We provide 33 ft power cord with inline GFCI for use on all exterior outlets.
•     CUSTOMER SUPPORT: We provide a 2 year warranty, if you have any problems with your high pressure cleaner, you can contact us at any time. If you are not satisfied, you can get a full refund within 30 days! !

How to remove blood stains from concrete surfaces

If you have an accident that results in injury, you may need to be prepared to remove blood stains from surfaces around your home. If allowed to sit, blood can easily cause unsightly marks on a variety of surfaces, from furniture to carpets, clothing, and more. If you accidentally end up with a blood stain on a concrete surface, acting quickly is one of the best ways to ensure that all traces can be removed properly. Read on for a short guide on how to do this.

Step 1: clean up fresh blood

If you can target the affected area immediately after the accident, the first thing to do is clean up any excess blood that may be accumulating on the ground. Use a clean cloth to rub it in and avoid rubbing as this could spread the stain. Continue until you have removed all excess liquid from the soil. Wear gloves while doing this and be very careful not to spread the blood and make the stain worse. Gloves are also important for your own safety, as someone else's blood may be contaminated and capable of spreading disease.

Step 2 - Scrub the dry areas

Use a stiff-bristled brush to scrub the bloody patch. The objective is to get the dry particles in the concrete to loosen and peel off. Continue to go over the stain for about 10 minutes or until the blood has completely come off.

Step 3: sweep up the debris

If all or some dried blood has come out, use a broom and dustpan to sweep it up. This will generally work well if the spill is older and has had a chance to dry completely on the concrete surface. However, it can be tricky if the accident just happened. Dispose of waste in a safe and healthy manner, following the legal guidelines regarding hazardous waste disposal in your area.

Step 4: apply a detergent mixture

In a small bowl, mix one part liquid dish detergent with three parts water and stir until the contents are completely combined. Pour a small amount of the solution onto the stained area and then continue scrubbing vigorously with the stiff bristle brush. See if the stain begins to appear or if you will need a stronger method. Wipe up the liquid with a clean cloth or paper towels if successful.

Step 5: treat with hydrogen peroxide

If the stain still persists after you've completed all of the above steps, pour a small amount of hydrogen peroxide on the area. Let it sit for about 15 minutes so it begins to break down the blood and then scrub it once more with the stiff bristle brush. Wipe off the peroxide with another clean cloth or paper towel. Re-examine the stain; if it's still there, treat it with another dollop of hydrogen peroxide and rub until it comes off.

How to remove dry cement

Cement is one of the most used materials in construction and home repair. Learn how to clean dry cement from tiles, how to remove cement from metal and clothing with these tips.

Cement is a somewhat complicated material to handle, especially if we are doing a project on our own at home. The problem with working with cement is that it can fall on unwanted surfaces, and if it dries it is difficult to remove. But don't worry, we have the best solutions and techniques on how to remove dry cement from your floors and even your clothes. Discover them below!

How to remove dry cement from tiles

You made repairs at home and are wondering how to remove cement residue from the floor? We are going to teach you how to clean dry cement on tiles step by step:
 Buy a cement remover product at a hardware store. The most common is the so-called RC-10.

•  Wear protective gloves and goggles when working with these types of chemical materials
•  Apply the product on the cement stains and let it act for 5 minutes.
•  Scrub the tiles with a brush to remove the now thinned cement.
•  Dry the area with a cotton cloth.
•  Repeat the process if necessary, until all the dry cement stains have been removed from your ceramic floor.
•  Lastly, clean the floor with a cloth dampened in clean water.

How to remove cement from metal

For metal surfaces, such as aluminum windows or doors, the cement removal process is similar.

If there are coarse cement residues on the metal, try removing them with a putty knife. Then use the cement remover liquid, let it work and wipe with a clean cloth

How to clean contact cement from clothing

Now that you know how to clean cement-stained ceramic floors, it's time you learned how to remove cement from clothing. Pay attention to these tips:

How to get cement out of clothes:

• If you stained your clothes with dry cement powder, don't get it wet!
• Using a stiff bristle brush, brush the garment on both sides to remove as much of the cement dust as possible.
• Wash the garment in the washing machine normally, but do not mix it with other clothes.
• In the case of wet cement stains, with a blunt knife or spatula, remove the cement from the fabric, and apply a few drops of cement remover to the fabric to remove the rest of the cement.
• Be careful when using these chemicals because they can damage fabrics. Try the product on an inconspicuous area of ​​the garment first.
• Wash the garment as usual.

Key steps:

• When working with cement, wear old clothes that you don't mind getting dirty. You will save yourself trouble.
• Cover all the surfaces in the areas where you use cement with a cloth or sheet, or prepare the cement outside your house.
• If you do get stained with cement, act fast to remove the stains effectively.

Westinghouse Outdoor Power Equipment Electric Pressure Washer 1500 MAX PSI 1.5 GPM with Anti-Tipping Technology, ePX2000, Foam Cannon with Adjustable Spray

 Westinghouse Outdoor Power Equipment Electric Pressure Washer 1500 MAX PSI 1.5 GPM with Anti-Tipping Technology, ePX2000, Foam Cannon with Adjustable Spray

 About this item

•     1500 max PSI of deep-cleaning water pressure and up to 1.5 GPM water flow - Adjustable spray wand with easy-coil nylon-braided 15' hose
•     Super compact and lightweight at 14” tall and 15 lb. for convenient storage and portability - Four Quick-Lock wheels with 360° steering design and low center of gravity engineered for anti-tipping design
•     Foaming soap cannon with 10 oz (300 mL) detachable bottle to add detergents/chemicals for versatile cleaning power on decks, driveways, garage floors, stairs, fencing, patio furniture, and vehicles
•     Pump automatically stops when trigger is not engaged to conserve energy, prolong pump life, and added safety
•     Backed by 3-Year Limited Manufacturer Service, Labor, and Parts Coverage

CLEANING CONCRETE SURFACES

Concrete stained surfaces can be cleaned, but to guarantee results you need to know the type of cleaning and the appropriate procedure in each case. To do this, nothing better than reading this article and others that will follow, as they contain everything there is to know on the subject.

Cleaning should be done in a way that removes dirt without neglecting the concrete. The structure and color of the cleaned surfaces must not differ from the untreated surfaces. In principle, three cleaning methods can be used: 1

• mechanical procedures (scraping, rubbing, brushing, etc.);
• cleaning by washing (softening of the dirt and its elimination with water);
• dissolution cleaning (dissolution, absorption).

Sometimes all three methods are combined or used one after the other.

Stains on concrete surfaces

Soot, dust, sand, rubber particles, greasy materials, etc. are deposited on concrete surfaces. Lime efflorescence is also frequently added to newly finished concrete elements, rust stains, microorganisms, plants, as well as products of the reaction of cement paste with compounds in the air.

Initially, these deposits usually only damage the appearance of concrete elements, but do not directly reduce the functional capacity or durability of the same. Even certain layers of dirt are transformed into protective layers (patina). However, these crusts can also contain contaminating materials that damage the materials they cover. The faster a stain is removed, the greater the chances of success. Old stains can spread on the surface or penetrate deeply and are often solidly bound to the hardened cement paste, with which they sometimes react, with effects that make cleaning more difficult. On the other hand, it sometimes happens that mixtures are formed with the stains that were already in the concrete before,

Criteria for choosing cleaning methods

In general, the procedure should be chosen that allows the desired effect to be obtained by the least aggressive means, and that does not attack, or that attacks very little, the hardened cement paste. In addition, care must be taken that other elements that are in the vicinity and are made of wood, glass, aluminum or plastic material, as well as the gasket materials, can be protected if they are at risk of being attacked. It goes without saying that the people doing the cleaning should always be out of danger, as well as other people, plants or animals in the immediate environment. The evacuation of water, sand, dust, etc., coming from cleaning, must be carried out in accordance with the provisions of the legislation. Before using a procedure to solve a cleaning problem for the first time, it will be necessary to test in an inconspicuous place. In the case of a wet test, the effectiveness of the procedure cannot be judged until at least one week later.

Procedures based on the use of a combination of solvents or chemicals, or even both, are well known as a way to remove many types of stains on concrete surfaces. This will be covered in the next issue.

The following list shows different cleaning procedures in order of increasing efficiency and, for unidentified stains, it is advisable to use the first one that achieves the desired effect.

• Dry rubbing with a stiff brush
• Surface wetting, dry rubbing with a hard brush, low pressure water jet washing
• Cleaning with a high pressure water jet or steam
• Cleaning chemicals (for example, acids or bases)
• Sandblasting or other abrasive
• Torch cleaning

At least the last two of these procedures erode the concrete to a greater or lesser extent, generally requiring a coating to be applied immediately or other measures to be taken. Some of the main non-chemical procedures for cleaning concrete surfaces are listed in Table 1.

For delicate concrete surfaces it is advisable to use procedures whose degree of aggressiveness increases more slowly:

• Water with a soft brush
• Mild soapy water
• Strong soapy water
• Stronger soapy water and ammonia
• Stronger soapy water and vinegar

If that does not work, it will be necessary to resort to stronger products.

Wet cleaning

Cleaning with water is one of the procedures that mistreat concrete the least. It is effective only when the stains are only on the concrete surface and have been fixed there by water-soluble compounds, such as gypsum (CaSo4.2 H2O). (Gypsum results from the reaction of calcium hydroxide [Ca (OH) 2] coming out of the water contained in the pores of concrete, with the sulfur dioxide [SO2] contained in the air.)

Here, different degrees of cleaning are also possible:

• Cold water cleaning without pressure
• Cleaning with cold water under pressure
• Pressureless hot water cleaning
• Cleaning with very hot water (steam)

For cleaning with water under pressure, flat nozzles and special discharge systems are commercially available.5 High pressure water jets can also be used to remove thicker or thin layers of concrete. The cleaning effect of the different procedures can be improved by the addition of soap or other surfactants (surface agents), particularly for the removal of greasy surface stains. When water is not enough to remove softened staining matter, brushing is often indicated.

Mechanical and thermal cleaning procedures

There are numerous variants of mechanical cleaning procedures. All cause a more or less great loss of matter, which damages the surface, and it is the case that it remains in such a way that it suffers new stains. Generally used: 2.6

Cleaning by hand with

• brush or broom
• cellular glass
• water resistant sandpaper

Mechanical cleaning with

• circular brush
• strawberries
• corundum discs

Spray cleaning with

• sand
• wet sand
• grain
• jet of water under pressure
• jet of water under pressure combined with sand
• thermal cleaning
• blowing with special nozzle

Many small stains can be removed by simply scrubbing with a stiff non-metallic brush, fine pumice stone, or cellular glass. This type of rubbing can also serve as an auxiliary means for cleaning by the wet method. If done properly, this rubbing does not damage the concrete surface at all. However, do not use mechanical brushes (steel or brass), because fine metal particles can cause color changes.

Sand blasting 2, 3, 7 lends itself to the removal of numerous impurities that have not penetrated deeply into the hardened cement paste. This abrasive treatment pulverizes and removes dirt particles as well as some of the surface layer. Since there are many abrasives available (blast furnace slag, silicon carbide, quartz sand, walnut shells, etc.), you can choose the blasting method that damages the substrate as little as possible. The blasting, however, is little appreciated as a cleaning procedure because, despite all the precautions, the loss of material is inevitable, the surfaces become rough and, therefore, more exposed to the influence of the environment. Also, this procedure generates a lot of dust and noise,

Wet blasting is less aggressive than dry blasting.2, 3, 7 Although some of the same abrasives are used as for dry blasting, the surface stresses are lower, and less dust is produced. With thermal cleaning, using a special 2.6 torch with an oxyacetylene flame, the concrete surface is subjected to such stress that the upper area disintegrates and partially separates. Rubber particles, as well as oil stains and other organic compounds are well removed as they burn.

Chemical cleaning procedures in general

The specialized literature informs us of a great variety of chemical products that allow removing certain stains from the concrete surface. We can add products that exist in the market and that have been perfected for certain applications.

This variety can have its risks, and requires great prudence on the part of users, as well as protection of the people who apply them; improper use can cause irreversible damage. To avoid this, it is necessary to call specialists, or inquire well in specialized publications. Inexperienced employees must be carefully updated on their new assignment.

The effect produced by chemicals on stains can be very diverse. In general, acids chemically react similarly with the surface of concrete. Often times, alkaline products and surfactants do not dissolve stains but emulsify them, that is, they give them a shape that allows them to be washed away.6

For many uses of chemicals, the procedure is almost always the same: the surface is carefully moistened so that the chemicals applied quickly by spray or brush do not penetrate too deeply. It is immediately rinsed with plenty of water, after a reaction time that should be as short as possible. It may be necessary to repeat these operations several times.

Acidic cleaning products

En el momento de utilizar ácidos, es particularmente importante el humedecimiento previo del concreto, ya que la mayor parte de los ácidos reaccionan con la pasta de cemento endurecido. Por la misma razón, una vez que ha terminado la limpieza, es necesario enjuagar hasta que el agua de lavado sea casi neutra. Las pruebas de neutralización con atomizador de las soluciones alcalinas no son aconsejables, pues es imposible conseguir una dosificación precisa.3

The most frequently used acids are the following: muriatic acid, phosphoric acid, sulfuric acid, oxalic acid, acetic acid and formic acid.7 If necessary, it must be taken into account that muriatic acid and sulfuric acid cause the formation of ions of chloride or sulfate, which promote corrosion of concrete. For safety reasons, the use of hydrofluoric acid should not be used.3 Acids generally help to eliminate efflorescence. It is advisable to use dilute muriatic acid. The use of phosphoric or formic acid at 15 percent is also possible. The acid is sprayed on the previously moistened support, or spread regularly with a sponge or brush. After three to five minutes (end of foaming), rinsed thoroughly and eventually brushed with a stiff brush. In the case of strong efflorescence, it may be necessary to repeat this treatment.3 Working with acids involves several disadvantages. For example, the concrete surface becomes rough and of a darker tint, even if chemicals are used sparingly. Acid that has penetrated the concrete and is not washed off will eventually dissolve the ferruginous minerals, which can cause brown spots on the concrete surface. even if chemicals are used sparingly. Acid that has penetrated the concrete and is not washed off will eventually dissolve the ferruginous minerals, which can cause brown spots on the concrete surface. even if chemicals are used sparingly. Acid that has penetrated the concrete and is not washed off will eventually dissolve the ferruginous minerals, which can cause brown spots on the concrete surface.

Construction elements that cannot stand coming into contact with acid must be protected.

Alkaline cleaning products

Alkaline cleaning products - mainly sodium and potassium hydroxide - have the advantage over acidic products that they do not react, or react very slowly, with the compounds of the hardened paste. This advantage is negated by the fact that such products attack glass and aluminum, and that they force users to wear protective glasses and clothing. It is also necessary to collect and neutralize the wash water.

Alkalis are especially suitable for removing oil or greasy stains, since they saponify fats and neutralize fatty acids. The reaction products can be removed by rinsing with water.

Protection of people and the environment

It has been mentioned several times in the course of this article that man runs risks when using chemicals. Employees, above all, have only some knowledge of chemistry and should not handle chemicals unless they have received sufficient instruction and are adequately protected. And, as necessary, the environment must also be protected against the action of chemicals.

Sun Joe SPX3000 2030 Max PSI 1.76 GPM 14.5-Amp Electric High Pressure Washer, Cleans Cars/Fences/Patios

 Sun Joe SPX3000 2030 Max PSI 1.76 GPM 14.5-Amp Electric High Pressure Washer, Cleans Cars/Fences/Patios

Brand     Sun Joe
Power Source     Corded-electric
Color     Cleans Cars/Fences/Patios
Item Dimensions LxWxH     15.6 x 13.5 x 33.9 inches
Maximum Pressure     1450 Pound per Square Inch
Item Weight     31 Pounds
Hose Length     20 Feet

 About this item

•     Power Source Type: Corded-Electric

HOW TO CLEAN CONCRETE SURFACES OF GREASE, OIL AND DIRT

In Concrete Surface Preparation - Part I , we discussed the detection, removal, and repair of unsound concrete. The next step is to remove the contaminants from the concrete. However, we cannot proceed directly to sandblasting, for the same reasons that steel sandblasting does not start immediately.
Dirt, dust,  and other  loose contaminants  will inhibit build-up and can be removed by first sweeping, vacuuming, blowing with air, or spraying with water.

Hydrophobic materials, such as  oil, grease,  and  stripping lubricants  also inhibit adhesion and must be removed. It's tempting to remove them by sandblasting the contaminated layer, but that can exacerbate the problem by spreading contaminants over previously uncontaminated areas. Recommended methods of removal are  scrubbing with a brush, water and detergent, steam cleaning, and low pressure washing (less than 5000 psi) . Some chemical cleaning methods are appropriate, but solvent cleaning is not. Unlike steel, concrete has pores and cracks that solvents can enter, which inhibits adhesion formation.

A detailed discussion of acceptable methods for surface cleaning can be found in SSPC SP 13 / NACE No. 6 - Concrete Surface Preparation.

Efflorescence

Efflorescence  is a powdery, crystalline deposit that slowly forms as moisture seeps soluble salts to the concrete surface.

Efflorescence is an aesthetic problem, not a structural one, but must be addressed when the concrete surface serves as a cover. If not done, efflorescence will cause unsightly stains under sealers and decorative finishes.

Being a soluble salt, efflorescence can be removed  by scrubbing with a brush and water, power washing, or with a light blast of abrasive steam . However, unless the underlying moisture problem is resolved, the efflorescence will return.

Humidity problems

If the relative humidity of the air is less than that of the cured concrete slab, the moisture will be drawn from under the slab to the surface, causing efflorescence, mold, and emulsion of flooring adhesives. Where sealants and other waterproof coatings block vapor flow, delaminations and blistering can occur. The solution is to install a vapor barrier under the slab.

There are two common tests for the relative humidity of concrete:

Plastic sheeting test. A plastic sheet is glued to the concrete surface and left for 16 hours or more, then removed and inspected for condensation. See ASTM D4263

Calcium chloride test. A plate with calcium chloride is weighed, placed on the concrete surface, and sealed under a dome. About sixty or seventy-two hours later, the plate is weighed again. The increased weight of the sample indicates the amount of moisture absorbed, which is used to calculate the moisture vapor emission rate (MVER).

Grout

Grout  is a weak, friable layer of cement and fine aggregate materials carried to the surface by water exiting the concrete. It is the result of excess water in the mix or excess water that has occurred during curing, and  is always present to some degree in new concrete.If grout is not removed, repairs, layers and coatings, because the friable layer has poor material strength. However, cement grout is tough enough to warrant removal by abrasive blasting, sandblasting, grinding, high pressure water blasting, or acid washing.

Grout appears when the concrete surface is scraped with a sharp object, leaving a dusty residue.

Curing compounds  are applied during the curing process to seal the concrete and retain water for cement hydration. By sealing the pores in concrete, curing compounds inhibit the adhesion of mortars and coatings. Adhesive layers and coatings above  present the same problem. The solution is to remove the concrete layer below the penetration level of the compound by abrasive blasting, shot blasting, high pressure water blasting, or by mechanical means.




With healthy, contaminant-free concrete, all that's left is to properly scrape the surface, but to what extent? In Part III of our series on Concrete Surface Preparation, we will discuss the specifications of structures and blasters to agree on the number of profiles needed, and examine the various concrete surface preparation methods, their advantages and disadvantages, and their applications.