PB-2 Polymer Modified Asphalt Waterproof Coating Construction Technical Requirements

Waterproofing is the second process in the bridge deck construction process, which is often ignored by novice owners and focuses on other componen.

Bridge waterproof layer construction

Technical indicators

PB waterproof coatings have been tested by authoritative testing institutions such as the Ministry of Communications, and all meet the standard technical requirements of the building materials industry standard of the Republic of China (JC/T975-2005) and the transportation industry standard of the People's Republic of China (JT/T535-200

Scope of use

PB polymer modified bitumen waterproof coating is suitable for bridge deck waterproofing of urban viaducts, overpasses, flyover bridges and highway bridg.

Coating characteristics

The paint does not contain tar, is non-toxic, has no peculiar smell, and is an environmentally friendly product;

The rubber in the modified asphalt forms a continuous network and penetrates each other, cross-linking, so that the modification exhibits polymer properties;

Good cold resistance, heat resistance, corrosion resistance and strong adhesion;

Strong shear resistance, can withstand the long-term load and compressive requirements of the bridge deck, and can prevent structural damage caused by water seepage;

Not only has good waterproof performance, but also can absorb the stress and noise of the road and bridge deck, as a stress absorption layer;

Because PB waterproof coating itself has certain elastic and plastic deformation ability, it can bear the load without being damag.

Fourth, the construction process

Cleaning the base layer (shot blasting) → key parts treatment → first waterproof layer → carcass reinforcement layer (non-woven fabric or alkali-free glass fiber) → second waterproof layer → third waterproof layer (can be carried out according to construction requirements Multiple spraying) → Waterproof layer maintenance → Paving asphalt concre.

Bridge deck waterproofing construction - bridge deck shot blasting

Construction method

It can be brushed, rolled or spray.

The latter pass should be cured in the previous pass to form a film and be carried out in the direction perpendicular to the previous pa.

The general interval is 4 h to 7 h (depending on the temperatur.

The thickness of the coating film is 0mm, and the total amount of coating is 5kg/m

Before paving asphalt, it can be used to spread alkali-free glass fiber on the surface of the waterproof layer to make a reinforcement layer to increase the toughness and shear force of the waterproof coating fi.

Set carcass reinforced fiberglass

Construction of PB waterproof coating for bridge deck waterproof layer

Recommended dosage

The general surface layer of PB-2 polymer-modified asphalt waterproof coating is 5-3kg/square meter, and it can be adjusted according to the engineering gra.

Seven, construction precautions

Before construction, the brown brush and the brush should be fully soaked to make it soft and smoo.

No construction is allowed when the temperature is below 0°C or higher than 35°C (high temperature construction should be avoide.

The storage and transportation temperature is 5℃～3

Select the construction in the weather without rain and snow within 4 hou.

The coating film is not dry or the asphalt is not paved as befo.

Rinse the construction tools with water immediately after use, for reu.

PB waterproof coating not only has the excellent elasticity, heat resistance and adhesion of high molecular polymer, but also has good affinity with petroleum asphalt products, and is suitable for construction under high temperature conditions of asphalt concre.

It is a polymer-modified asphalt water-based waterproof coating prepared by modifying asphalt and adding water with high-quality asphalt as the base materi.