January 24, 2013 - Posted by Jordan Goldman

Here’s some EXCELLENT information on Belgard Pavers.  

Here’s the original link.  http://www.belgardlanka.com/questions.html

Frequently Asked Question

Q : IS IT CONCRETE OR CEMENT AND SAND?
A : BELGARD paving is a concrete product and not a cement and sand block.
Q : IS IT STRONG ENOUGH TO WITHSTAND HEAVY LOADS?
A : BELGARD interlock paving blocks are suitable for all normal traffic conditions and vehicle loads. It performs well for Driveways, Garages, Walkways, Bus terminals, Parking areas, Loading bays, Filling stations, Container terminals ect. Where abnormal vehicle loads or solid tyred vehicles are to be used, special precautions should be taken. The soil base compaction plays an important role in its long term performance. Hence, base need to be well compacted to prevent sinking of blocks. BELGARD representative will guide you regarding soil condition and suitable compaction material and method for your site.
Q : DOES THE COLOR GO ALL THE WAY THROUGH BELGARD PAVERS?
A : All BELGARD pavers have color throughout. Those manufactured with our exclusive Paver-Shield™ process have an extra concentration of cement and pigment on the wear layer providing deep rich colors and a smooth, dense wear layer.
Q : WILL THE COLOR OF MY BELGARD PAVEMENT FADE?
A : We use synthetic iron oxide pigments, in all our BELGARD pavers, which are very stable and fade resistant. A perception of fading can occur when the phenomenon called efflorescence takes place. Efflorescence results when water soluble salts within the pavers are brought to the surface by moisture, then react with air to form small crystals on the paver surface. Efflorescence can manifest itself as a slight haze or a white powder like coating. The phenomenon is quite common in most concrete products and some clay products especially those which incorporate mortar in their structure. Efflorescence is not harmful in any way and it is recommended that you allow the weathering process to effect removal. If for some reason you wish to hasten the process, you may follow the procedures listed in the section on cleaning.
Q : CAN PAVING BE INSTALLED ON TOP OF AN EXISTING CONCRETE FLOOR?
A : Can be done. However blocks with specific height may have to be specially made to match the heights of existing floors.
Q : HOW DO PAVERS COMPARE WITH PATTERNED CONCRETE?
A : Patterned concrete pavements are slabs of concrete. Therefore, they are prone to the same problems with thaw cycles, namely cracking and spalling. Also, unlike BELGARD  pavers, patterned concrete pavements don’t allow access to underground utilities or the ability to make repairs. At virtually the same price installed per square foot, BELGARD Pavers are clearly a superior choice.
Q : HOW CAN I REMOVE MOSS OR MOLD FROM MY PAVERS?
A : Generally Belgard Smoot Paver range has been treated for moss prior to installation. However if it appears, try liquid bleach diluted in water (10 parts water to one part bleach). Be careful not to get it on plant material. Keep in mind that there is nothing that will keep moss and mold from reappearing in a shady, damp area.
Q : I HAVE WHITE DEPOSITS ON MY PAVERS WHAT IS IT?
A : You are probably referring to efflorescence, a natural and common occurrence in many concrete products. Efflorescence occurs when natural salts come to the surface and leave behind a white deposit that can normally be brushed off. This is not a product defect or harmful to pavers and walls and BELGARD accepts no liability for its occurrence. It will usually weather away with time.
Q : WHAT CAN I DO IF MY PAVERS ARE STAINED OR DAMAGED?
A : Special products are available to clean different types of stains from concrete products.  If they are exceptionally stained or are damaged, individual units can be removed and replaced. Remove the sand around these pavers and use two flat head screwdrivers to lift the paver out. Rocking the paver gently in a back-and-forth motion will facilitate removal.
Q : WHAT METHODS TO USE WITH DIFFERENT TYPES OF STAINS?
A : Blood, Candy, Ketchup, Mustard, Food Stains - Apply liquid detergent full strength and allow it to penetrate for 20-30 minutes. Scrub and rinse with hot water. Removal is easier if you treat the stains immediately. Caulking and Chewing Gum - Chill with ice then scrape off as much as possible. Make a poultice (paste) of talcum powder and denatured alcohol. Scrub area with poultice and stiff brush then rinse with hot water and strong detergent. Clay Soil - Scrape off dry material then scrub with detergent and rinse with hot water. Leaf, Wood Rot and Tobacco- Apply household bleach and scrub with stiff bristled brush and rinse. Cement Mortar - Let harden then carefully remove hardened spots with a trowel, putty knife or chisel. Then clean with sulfuric acid (more commonly known as battery acid). Oil and Grease - Mop up excess with rags or paper towels. Then clean it with sulfuric acid (more commonly known as battery acid). Paint, fresh - Sop up all paint possible without wiping. If the paint is water based latex, soak and then scrub the area with hot water, scouring powder and a stiff brush until improvement ceases. Let dry and treat as for dried paint. Paint, dried -  A commercial paint remover may be used. Apply a liberal coat and allow to sit for 20-30 minutes. Gently scrub area to loosen paint. Do not rub loosened paint into paver surface or allow to spread. Blot up loosened paint and remover. Tire Marks - Scrub black area with water, detergent and scouring powder. Rinse with water. If tire marks remain after several attempts, treat area with sulfuric acid (more commonly known as battery acid)
Q : WILL WEEDS GROW BETWEEN MY PAVERS?
A : Weeds and grass between pavers occur when seeds or spores lodge in the joints between pavers. They will not grow from underneath. This can be minimized by using polymeric sand or mixing a pre-emergent granular weed killer into the joint sand. If weeds do appear, a spot vegetation killer (such as Round-Up™) can be used and will not damage the pavers.
Q : HOW DEEP DOWN DO YOU NEED TO GO IN ORDER TO MAKE THE BASE SUITABLE FOR INSTALLING BELGARD PAVING?
A : It depends on the type of ground. BELGARD representative will be able to guide you on this issue.
Q : WHAT MATERIALS DO YOU USE AS FOUNDATIONS?
A : We generally use quarry dust. However, with the type of ground conditions in certain sites may require mixture of quarry dust and medium size aggregates. In extreme cases, small   amount of cement is also to be mixed with quarry dust. Alternatively you could also use river sand or sea sand.
Q : HOW LONG WILL IT TAKE?
A : Every site is different and we would therefore need to assess the work involved before giving an accurate time estimate.

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