Fri, Sep 25, 2020

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Paver Clean­ing & Seal­ing Day­tona Beach Area (386) 8433833

Under­stand­ing Brick Paver Instal­la­tion Methods

When it comes to brick paver instal­la­tion, what’s under the pavers is just as impor­tant as the paver itself. A proper brick paver instal­la­tion will have the fol­low­ing com­po­nents, with each hav­ing it own pur­pose within your inter­lock­ing brick paver system.

1. Brick Pavers

2. Bed­ding Sand– Bed­ding sand is usu­ally 1″-2″ thick, and acts as a “fil­ter” to help pre­vent the base mate­r­ial residue from leech­ing up through the paver sys­tem. Leech­ing and upwelling of the base mate­ri­als is a com­mon issue when lit­tle or no bed­ding sand is used.

3. Com­pacted Base Material

4. Land­scape Fabric

5. Com­pacted Soil

6. Paver Edge Restraint

7. Land­scap­ing Spikes (if not a poured con­crete edge restraint)

Brick Paver Installation

Efflo­res­cence in Brick Pavers

Efflo­res­cence is a nat­ural and ran­dom occur­rence inher­ent in con­crete prod­ucts. It can mate­ri­al­ize at any time fol­low­ing the com­ple­tion of a project and it does not mean that the prod­uct is defec­tive or dam­aged.
Cal­cium in the con­crete is car­ried to the sur­face by mois­ture and when it reacts to car­bon diox­ide in the air it can leave a white haze on the prod­uct.
The struc­tural integrity of the prod­uct is not com­pro­mised by efflo­res­cence.
There are also spe­cially designed clean­ers to remove efflo­res­cence, but in most cases the rec­om­mended pro­ce­dure is to allow it to dis­si­pate over time.
Efflo­res­cence is not cov­ered under the C&D war­ranty, and cus­tomers should con­sult with their installers to dis­cuss the best rem­edy should it occur.
Efflo­res­cence is a whitish powder-​like deposit which can appear on con­crete prod­ucts. When cement hydrates (hard­ens after adding water), a sig­nif­i­cant amount of cal­cium hydrox­ide is formed. The cal­cium hydrox­ide is sol­u­ble in water and migrates by cap­il­lary action to the sur­face of the con­crete. A reac­tion occurs between the cal­cium hydrox­ide and car­bon diox­ide (from the
air) to form cal­cium car­bon­ate, then called efflo­res­cence. Efflo­res­cence does not affect the struc­tural per­for­mance or dura­bil­ity of con­crete pavers.
The reac­tion that takes place is the for­ma­tion of water sol­u­ble cal­cium bicar­bon­ate from cal­cium car­bon­ate, car­bon diox­ide and water. It may appear imme­di­ately or within months fol­low­ing instal­la­tion. Efflo­res­cence may reach its peak in as short as 60 days after instal­la­tion. It may remain for months and some of it may wear away. If instal­la­tion takes place dur­ing a dry period of the year, the next cycle of wet weather may some­times be nec­es­sary for efflo­res­cence to mate­ri­al­ize. If there is a need to remove deposits before they wear away, best results can be obtained by using a pro­pri­etary efflo­res­cence remover. The acid in pro­pri­etary clean­ing chem­i­cals is buffered and blended with other chem­i­cals to pro­vide effec­tive clean­ing with­out dam­age to the paver sur­face. Always refer to the chem­i­cal com­pany sup­ply­ing the chem­i­cals for rec­om­men­da­tions on proper dilu­tion and appli­ca­tion of chem­i­cals for removal of efflo­res­cence. They are gen­er­ally applied in sec­tions begin­ning at the top slope of the pave­ment. If the area is large, a sprayer is an effi­cient means to apply the cleaner. The chem­i­cals are scrubbed on the sur­face, and then rinsed away. Results can be ver­i­fied after let­ting the area dry
for at least 24 hours. In most instances one appli­ca­tion is suf­fi­cient. How­ever, in severe instances of efflo­res­cence, a sec­ond appli­ca­tion may be nec­es­sary. Con­tact the man­u­fac­turer of the clean­ing prod­uct to deter­mine if a sec­ond appli­ca­tion will not dis­color the pavers or expose some aggre­gates. Note: Pro­tec­tive cloth­ing, chem­i­cal resis­tant rub­ber boots and gloves, and eye gog­gles should be worn when apply­ing acid.

Accord­ing to the “ICPI” (Inter­lock­ing Con­crete Pave­ment Insti­tute), efflo­res­cence is a nat­ural process, in which a ran­dom white haze may appear on the sur­face of the brick, which is caused by lime or a water sol­u­ble cal­cium oxide that rises to the sur­face after repeated sat­u­ra­tions due to rain or sprin­klers. Efflo­res­cence does not affect the integrity of the bricks and will usu­ally resolve itself with time and expo­sure to the elements.”)

The proper seal­ing of con­crete brick pavers can either retard or stop com­pletely the efflo­res­cence process due to the mois­ture pro­tec­tion achieved by the seal­ing process. How­ever, this war­ranty does not state or imply that efflo­res­cence will stop as a result of the seal­ing process.

In addi­tion, oil based seal­ers will actu­ally pre­vent the efflo­res­cence from ris­ing to the sur­face of the brick paver and get trapped under the sealer. The only fix for this is to strip the pavers of all sealer using a sol­vent or strip­per to remove the sealer com­pletely. Water based seal­ers, such as Seal n Lock are a “breathe-​able” prod­uct, mean­ing that the efflo­res­cence can escape through the sealer and be sim­ply washed away with a gar­den hose.